Mercurial > cpython-lru_cache-weakref

annotate Modules/itertoolsmodule.c @ 82251:bb5a8564e186 2.7

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Issue #13153: Tkinter functions now raise TclError instead of ValueError when a unicode argument contains non-BMP character.
author Serhiy Storchaka <storchaka@gmail.com>
date Mon, 18 Feb 2013 13:00:08 +0200
parents 62f2d3f6015e
children d17d10c84d27
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1
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2 #include "Python.h"
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3 #include "structmember.h"
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4
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5 /* Itertools module written and maintained
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6 by Raymond D. Hettinger <python@rcn.com>
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7 Copyright (c) 2003 Python Software Foundation.
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8 All rights reserved.
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9 */
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10
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11
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12 /* groupby object ***********************************************************/
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13
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14 typedef struct {
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15 PyObject_HEAD
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16 PyObject *it;
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17 PyObject *keyfunc;
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18 PyObject *tgtkey;
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19 PyObject *currkey;
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20 PyObject *currvalue;
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21 } groupbyobject;
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22
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23 static PyTypeObject groupby_type;
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24 static PyObject *_grouper_create(groupbyobject *, PyObject *);
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25
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26 static PyObject *
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27 groupby_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
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28 {
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29 static char *kwargs[] = {"iterable", "key", NULL};
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30 groupbyobject *gbo;
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31 PyObject *it, *keyfunc = Py_None;
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32
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33 if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|O:groupby", kwargs,
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34 &it, &keyfunc))
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35 return NULL;
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36
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37 gbo = (groupbyobject *)type->tp_alloc(type, 0);
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38 if (gbo == NULL)
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39 return NULL;
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40 gbo->tgtkey = NULL;
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41 gbo->currkey = NULL;
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42 gbo->currvalue = NULL;
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43 gbo->keyfunc = keyfunc;
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44 Py_INCREF(keyfunc);
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45 gbo->it = PyObject_GetIter(it);
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46 if (gbo->it == NULL) {
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47 Py_DECREF(gbo);
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48 return NULL;
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49 }
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50 return (PyObject *)gbo;
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51 }
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52
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53 static void
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54 groupby_dealloc(groupbyobject *gbo)
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55 {
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56 PyObject_GC_UnTrack(gbo);
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57 Py_XDECREF(gbo->it);
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58 Py_XDECREF(gbo->keyfunc);
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59 Py_XDECREF(gbo->tgtkey);
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60 Py_XDECREF(gbo->currkey);
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61 Py_XDECREF(gbo->currvalue);
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62 Py_TYPE(gbo)->tp_free(gbo);
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63 }
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64
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65 static int
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66 groupby_traverse(groupbyobject *gbo, visitproc visit, void *arg)
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67 {
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68 Py_VISIT(gbo->it);
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69 Py_VISIT(gbo->keyfunc);
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70 Py_VISIT(gbo->tgtkey);
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71 Py_VISIT(gbo->currkey);
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72 Py_VISIT(gbo->currvalue);
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73 return 0;
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74 }
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75
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76 static PyObject *
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77 groupby_next(groupbyobject *gbo)
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78 {
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79 PyObject *newvalue, *newkey, *r, *grouper, *tmp;
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80
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81 /* skip to next iteration group */
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82 for (;;) {
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83 if (gbo->currkey == NULL)
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84 /* pass */;
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85 else if (gbo->tgtkey == NULL)
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86 break;
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87 else {
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88 int rcmp;
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89
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90 rcmp = PyObject_RichCompareBool(gbo->tgtkey,
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91 gbo->currkey, Py_EQ);
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92 if (rcmp == -1)
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93 return NULL;
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94 else if (rcmp == 0)
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95 break;
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96 }
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97
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98 newvalue = PyIter_Next(gbo->it);
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99 if (newvalue == NULL)
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100 return NULL;
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101
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102 if (gbo->keyfunc == Py_None) {
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103 newkey = newvalue;
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104 Py_INCREF(newvalue);
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105 } else {
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106 newkey = PyObject_CallFunctionObjArgs(gbo->keyfunc,
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107 newvalue, NULL);
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108 if (newkey == NULL) {
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109 Py_DECREF(newvalue);
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110 return NULL;
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111 }
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112 }
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113
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114 tmp = gbo->currkey;
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115 gbo->currkey = newkey;
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116 Py_XDECREF(tmp);
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117
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118 tmp = gbo->currvalue;
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119 gbo->currvalue = newvalue;
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120 Py_XDECREF(tmp);
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121 }
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122
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123 Py_INCREF(gbo->currkey);
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124 tmp = gbo->tgtkey;
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125 gbo->tgtkey = gbo->currkey;
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126 Py_XDECREF(tmp);
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127
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128 grouper = _grouper_create(gbo, gbo->tgtkey);
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129 if (grouper == NULL)
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130 return NULL;
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131
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132 r = PyTuple_Pack(2, gbo->currkey, grouper);
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133 Py_DECREF(grouper);
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134 return r;
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135 }
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136
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137 PyDoc_STRVAR(groupby_doc,
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138 "groupby(iterable[, keyfunc]) -> create an iterator which returns\n\
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139 (key, sub-iterator) grouped by each value of key(value).\n");
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140
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141 static PyTypeObject groupby_type = {
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142 PyVarObject_HEAD_INIT(NULL, 0)
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143 "itertools.groupby", /* tp_name */
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144 sizeof(groupbyobject), /* tp_basicsize */
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145 0, /* tp_itemsize */
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146 /* methods */
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147 (destructor)groupby_dealloc, /* tp_dealloc */
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148 0, /* tp_print */
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149 0, /* tp_getattr */
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150 0, /* tp_setattr */
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151 0, /* tp_compare */
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152 0, /* tp_repr */
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153 0, /* tp_as_number */
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154 0, /* tp_as_sequence */
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155 0, /* tp_as_mapping */
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156 0, /* tp_hash */
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157 0, /* tp_call */
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158 0, /* tp_str */
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159 PyObject_GenericGetAttr, /* tp_getattro */
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160 0, /* tp_setattro */
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161 0, /* tp_as_buffer */
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162 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
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163 Py_TPFLAGS_BASETYPE, /* tp_flags */
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164 groupby_doc, /* tp_doc */
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165 (traverseproc)groupby_traverse, /* tp_traverse */
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166 0, /* tp_clear */
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167 0, /* tp_richcompare */
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168 0, /* tp_weaklistoffset */
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169 PyObject_SelfIter, /* tp_iter */
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170 (iternextfunc)groupby_next, /* tp_iternext */
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171 0, /* tp_methods */
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172 0, /* tp_members */
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173 0, /* tp_getset */
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174 0, /* tp_base */
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175 0, /* tp_dict */
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176 0, /* tp_descr_get */
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177 0, /* tp_descr_set */
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178 0, /* tp_dictoffset */
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179 0, /* tp_init */
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180 0, /* tp_alloc */
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181 groupby_new, /* tp_new */
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182 PyObject_GC_Del, /* tp_free */
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183 };
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184
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185
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186 /* _grouper object (internal) ************************************************/
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187
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188 typedef struct {
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189 PyObject_HEAD
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190 PyObject *parent;
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191 PyObject *tgtkey;
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192 } _grouperobject;
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193
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194 static PyTypeObject _grouper_type;
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195
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196 static PyObject *
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197 _grouper_create(groupbyobject *parent, PyObject *tgtkey)
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198 {
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199 _grouperobject *igo;
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200
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201 igo = PyObject_GC_New(_grouperobject, &_grouper_type);
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202 if (igo == NULL)
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203 return NULL;
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204 igo->parent = (PyObject *)parent;
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205 Py_INCREF(parent);
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206 igo->tgtkey = tgtkey;
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207 Py_INCREF(tgtkey);
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208
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209 PyObject_GC_Track(igo);
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210 return (PyObject *)igo;
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211 }
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212
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213 static void
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214 _grouper_dealloc(_grouperobject *igo)
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215 {
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216 PyObject_GC_UnTrack(igo);
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217 Py_DECREF(igo->parent);
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218 Py_DECREF(igo->tgtkey);
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219 PyObject_GC_Del(igo);
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220 }
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221
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222 static int
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223 _grouper_traverse(_grouperobject *igo, visitproc visit, void *arg)
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224 {
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225 Py_VISIT(igo->parent);
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226 Py_VISIT(igo->tgtkey);
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227 return 0;
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228 }
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229
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230 static PyObject *
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231 _grouper_next(_grouperobject *igo)
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232 {
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233 groupbyobject *gbo = (groupbyobject *)igo->parent;
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234 PyObject *newvalue, *newkey, *r;
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235 int rcmp;
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236
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237 if (gbo->currvalue == NULL) {
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238 newvalue = PyIter_Next(gbo->it);
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239 if (newvalue == NULL)
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240 return NULL;
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241
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242 if (gbo->keyfunc == Py_None) {
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243 newkey = newvalue;
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244 Py_INCREF(newvalue);
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245 } else {
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246 newkey = PyObject_CallFunctionObjArgs(gbo->keyfunc,
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247 newvalue, NULL);
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248 if (newkey == NULL) {
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249 Py_DECREF(newvalue);
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250 return NULL;
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251 }
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252 }
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253
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254 assert(gbo->currkey == NULL);
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255 gbo->currkey = newkey;
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256 gbo->currvalue = newvalue;
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257 }
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258
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259 assert(gbo->currkey != NULL);
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260 rcmp = PyObject_RichCompareBool(igo->tgtkey, gbo->currkey, Py_EQ);
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261 if (rcmp <= 0)
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262 /* got any error or current group is end */
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263 return NULL;
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264
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265 r = gbo->currvalue;
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266 gbo->currvalue = NULL;
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267 Py_CLEAR(gbo->currkey);
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268
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269 return r;
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270 }
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271
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272 static PyTypeObject _grouper_type = {
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273 PyVarObject_HEAD_INIT(NULL, 0)
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274 "itertools._grouper", /* tp_name */
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275 sizeof(_grouperobject), /* tp_basicsize */
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276 0, /* tp_itemsize */
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277 /* methods */
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278 (destructor)_grouper_dealloc, /* tp_dealloc */
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279 0, /* tp_print */
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280 0, /* tp_getattr */
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281 0, /* tp_setattr */
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282 0, /* tp_compare */
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283 0, /* tp_repr */
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284 0, /* tp_as_number */
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285 0, /* tp_as_sequence */
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286 0, /* tp_as_mapping */
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287 0, /* tp_hash */
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288 0, /* tp_call */
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289 0, /* tp_str */
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290 PyObject_GenericGetAttr, /* tp_getattro */
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291 0, /* tp_setattro */
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292 0, /* tp_as_buffer */
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293 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */
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294 0, /* tp_doc */
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295 (traverseproc)_grouper_traverse,/* tp_traverse */
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296 0, /* tp_clear */
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297 0, /* tp_richcompare */
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298 0, /* tp_weaklistoffset */
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299 PyObject_SelfIter, /* tp_iter */
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300 (iternextfunc)_grouper_next, /* tp_iternext */
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301 0, /* tp_methods */
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302 0, /* tp_members */
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303 0, /* tp_getset */
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304 0, /* tp_base */
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305 0, /* tp_dict */
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306 0, /* tp_descr_get */
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307 0, /* tp_descr_set */
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308 0, /* tp_dictoffset */
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309 0, /* tp_init */
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310 0, /* tp_alloc */
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311 0, /* tp_new */
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312 PyObject_GC_Del, /* tp_free */
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313 };
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314
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315
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316
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317 /* tee object and with supporting function and objects ***************/
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318
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319 /* The teedataobject pre-allocates space for LINKCELLS number of objects.
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320 To help the object fit neatly inside cache lines (space for 16 to 32
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321 pointers), the value should be a multiple of 16 minus space for
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322 the other structure members including PyHEAD overhead. The larger the
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323 value, the less memory overhead per object and the less time spent
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324 allocating/deallocating new links. The smaller the number, the less
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325 wasted space and the more rapid freeing of older data.
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326 */
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327 #define LINKCELLS 57
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328
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329 typedef struct {
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330 PyObject_HEAD
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331 PyObject *it;
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332 int numread;
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333 PyObject *nextlink;
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334 PyObject *(values[LINKCELLS]);
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335 } teedataobject;
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336
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337 typedef struct {
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338 PyObject_HEAD
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339 teedataobject *dataobj;
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340 int index;
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341 PyObject *weakreflist;
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342 } teeobject;
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343
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344 static PyTypeObject teedataobject_type;
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345
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346 static PyObject *
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347 teedataobject_new(PyObject *it)
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348 {
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349 teedataobject *tdo;
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350
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351 tdo = PyObject_GC_New(teedataobject, &teedataobject_type);
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352 if (tdo == NULL)
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353 return NULL;
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354
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355 tdo->numread = 0;
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356 tdo->nextlink = NULL;
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357 Py_INCREF(it);
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358 tdo->it = it;
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359 PyObject_GC_Track(tdo);
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360 return (PyObject *)tdo;
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361 }
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362
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363 static PyObject *
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364 teedataobject_jumplink(teedataobject *tdo)
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365 {
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366 if (tdo->nextlink == NULL)
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367 tdo->nextlink = teedataobject_new(tdo->it);
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368 Py_XINCREF(tdo->nextlink);
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369 return tdo->nextlink;
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370 }
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371
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372 static PyObject *
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373 teedataobject_getitem(teedataobject *tdo, int i)
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374 {
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375 PyObject *value;
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376
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377 assert(i < LINKCELLS);
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378 if (i < tdo->numread)
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379 value = tdo->values[i];
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380 else {
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381 /* this is the lead iterator, so fetch more data */
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382 assert(i == tdo->numread);
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383 value = PyIter_Next(tdo->it);
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384 if (value == NULL)
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385 return NULL;
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386 tdo->numread++;
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387 tdo->values[i] = value;
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388 }
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389 Py_INCREF(value);
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390 return value;
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391 }
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392
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393 static int
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394 teedataobject_traverse(teedataobject *tdo, visitproc visit, void * arg)
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395 {
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396 int i;
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397 Py_VISIT(tdo->it);
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398 for (i = 0; i < tdo->numread; i++)
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399 Py_VISIT(tdo->values[i]);
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400 Py_VISIT(tdo->nextlink);
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401 return 0;
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402 }
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403
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404 static void
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405 teedataobject_safe_decref(PyObject *obj)
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406 {
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407 while (obj && Py_TYPE(obj) == &teedataobject_type &&
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408 Py_REFCNT(obj) == 1) {
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409 PyObject *nextlink = ((teedataobject *)obj)->nextlink;
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410 ((teedataobject *)obj)->nextlink = NULL;
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411 Py_DECREF(obj);
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412 obj = nextlink;
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413 }
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414 Py_XDECREF(obj);
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415 }
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416
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417 static int
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418 teedataobject_clear(teedataobject *tdo)
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419 {
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420 int i;
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421 PyObject *tmp;
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422
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423 Py_CLEAR(tdo->it);
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424 for (i=0 ; i<tdo->numread ; i++)
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425 Py_CLEAR(tdo->values[i]);
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426 tmp = tdo->nextlink;
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427 tdo->nextlink = NULL;
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428 teedataobject_safe_decref(tmp);
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429 return 0;
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430 }
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431
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432 static void
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433 teedataobject_dealloc(teedataobject *tdo)
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434 {
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435 PyObject_GC_UnTrack(tdo);
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436 teedataobject_clear(tdo);
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437 PyObject_GC_Del(tdo);
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438 }
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439
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440 PyDoc_STRVAR(teedataobject_doc, "Data container common to multiple tee objects.");
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441
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442 static PyTypeObject teedataobject_type = {
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443 PyVarObject_HEAD_INIT(0, 0) /* Must fill in type value later */
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444 "itertools.tee_dataobject", /* tp_name */
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445 sizeof(teedataobject), /* tp_basicsize */
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446 0, /* tp_itemsize */
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447 /* methods */
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448 (destructor)teedataobject_dealloc, /* tp_dealloc */
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449 0, /* tp_print */
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450 0, /* tp_getattr */
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451 0, /* tp_setattr */
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452 0, /* tp_compare */
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453 0, /* tp_repr */
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454 0, /* tp_as_number */
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455 0, /* tp_as_sequence */
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456 0, /* tp_as_mapping */
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457 0, /* tp_hash */
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458 0, /* tp_call */
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459 0, /* tp_str */
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460 PyObject_GenericGetAttr, /* tp_getattro */
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461 0, /* tp_setattro */
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462 0, /* tp_as_buffer */
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463 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */
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464 teedataobject_doc, /* tp_doc */
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465 (traverseproc)teedataobject_traverse, /* tp_traverse */
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466 (inquiry)teedataobject_clear, /* tp_clear */
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467 0, /* tp_richcompare */
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468 0, /* tp_weaklistoffset */
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469 0, /* tp_iter */
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470 0, /* tp_iternext */
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471 0, /* tp_methods */
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472 0, /* tp_members */
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473 0, /* tp_getset */
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474 0, /* tp_base */
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475 0, /* tp_dict */
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476 0, /* tp_descr_get */
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477 0, /* tp_descr_set */
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478 0, /* tp_dictoffset */
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479 0, /* tp_init */
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480 0, /* tp_alloc */
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481 0, /* tp_new */
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482 PyObject_GC_Del, /* tp_free */
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483 };
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484
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485
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486 static PyTypeObject tee_type;
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487
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488 static PyObject *
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489 tee_next(teeobject *to)
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490 {
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491 PyObject *value, *link;
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492
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493 if (to->index >= LINKCELLS) {
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494 link = teedataobject_jumplink(to->dataobj);
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495 if (link == NULL)
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496 return NULL;
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497 Py_DECREF(to->dataobj);
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498 to->dataobj = (teedataobject *)link;
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499 to->index = 0;
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500 }
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501 value = teedataobject_getitem(to->dataobj, to->index);
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502 if (value == NULL)
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503 return NULL;
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504 to->index++;
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505 return value;
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506 }
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507
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508 static int
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509 tee_traverse(teeobject *to, visitproc visit, void *arg)
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510 {
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511 Py_VISIT((PyObject *)to->dataobj);
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512 return 0;
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513 }
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514
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515 static PyObject *
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516 tee_copy(teeobject *to)
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517 {
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518 teeobject *newto;
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519
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520 newto = PyObject_GC_New(teeobject, &tee_type);
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521 if (newto == NULL)
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522 return NULL;
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523 Py_INCREF(to->dataobj);
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524 newto->dataobj = to->dataobj;
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525 newto->index = to->index;
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526 newto->weakreflist = NULL;
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527 PyObject_GC_Track(newto);
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528 return (PyObject *)newto;
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529 }
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530
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531 PyDoc_STRVAR(teecopy_doc, "Returns an independent iterator.");
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532
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533 static PyObject *
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534 tee_fromiterable(PyObject *iterable)
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535 {
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536 teeobject *to;
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537 PyObject *it = NULL;
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538
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diff changeset
539 it = PyObject_GetIter(iterable);
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diff changeset
540 if (it == NULL)
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541 return NULL;
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diff changeset
542 if (PyObject_TypeCheck(it, &tee_type)) {
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543 to = (teeobject *)tee_copy((teeobject *)it);
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diff changeset
544 goto done;
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545 }
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diff changeset
546
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diff changeset
547 to = PyObject_GC_New(teeobject, &tee_type);
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548 if (to == NULL)
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549 goto done;
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diff changeset
550 to->dataobj = (teedataobject *)teedataobject_new(it);
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551 if (!to->dataobj) {
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552 PyObject_GC_Del(to);
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diff changeset
553 to = NULL;
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diff changeset
554 goto done;
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555 }
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556
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557 to->index = 0;
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558 to->weakreflist = NULL;
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559 PyObject_GC_Track(to);
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3096fab2a19c Improve the implementation of itertools.tee().
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diff changeset
560 done:
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561 Py_XDECREF(it);
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562 return (PyObject *)to;
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563 }
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564
3096fab2a19c Improve the implementation of itertools.tee().
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parents: 30800
diff changeset
565 static PyObject *
3096fab2a19c Improve the implementation of itertools.tee().
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diff changeset
566 tee_new(PyTypeObject *type, PyObject *args, PyObject *kw)
3096fab2a19c Improve the implementation of itertools.tee().
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parents: 30800
diff changeset
567 {
61465
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568 PyObject *iterable;
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569
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570 if (!PyArg_UnpackTuple(args, "tee", 1, 1, &iterable))
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571 return NULL;
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572 return tee_fromiterable(iterable);
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573 }
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parents: 30240
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574
37248
00e9d59c23b4 Make itertools.tee and its internal teedataobject participate in GC. This
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575 static int
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576 tee_clear(teeobject *to)
00e9d59c23b4 Make itertools.tee and its internal teedataobject participate in GC. This
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diff changeset
577 {
61465
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578 if (to->weakreflist != NULL)
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579 PyObject_ClearWeakRefs((PyObject *) to);
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580 Py_CLEAR(to->dataobj);
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581 return 0;
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Thomas Wouters <thomas@python.org>
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582 }
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583
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584 static void
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585 tee_dealloc(teeobject *to)
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586 {
61465
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587 PyObject_GC_UnTrack(to);
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588 tee_clear(to);
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589 PyObject_GC_Del(to);
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590 }
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591
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592 PyDoc_STRVAR(teeobject_doc,
3096fab2a19c Improve the implementation of itertools.tee().
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593 "Iterator wrapped to make it copyable");
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594
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595 static PyMethodDef tee_methods[] = {
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596 {"__copy__", (PyCFunction)tee_copy, METH_NOARGS, teecopy_doc},
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597 {NULL, NULL} /* sentinel */
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598 };
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599
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600 static PyTypeObject tee_type = {
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601 PyVarObject_HEAD_INIT(NULL, 0)
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602 "itertools.tee", /* tp_name */
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603 sizeof(teeobject), /* tp_basicsize */
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604 0, /* tp_itemsize */
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diff changeset
605 /* methods */
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606 (destructor)tee_dealloc, /* tp_dealloc */
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607 0, /* tp_print */
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608 0, /* tp_getattr */
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609 0, /* tp_setattr */
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610 0, /* tp_compare */
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611 0, /* tp_repr */
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612 0, /* tp_as_number */
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613 0, /* tp_as_sequence */
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614 0, /* tp_as_mapping */
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diff changeset
615 0, /* tp_hash */
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616 0, /* tp_call */
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617 0, /* tp_str */
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618 0, /* tp_getattro */
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619 0, /* tp_setattro */
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620 0, /* tp_as_buffer */
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diff changeset
621 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */
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622 teeobject_doc, /* tp_doc */
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623 (traverseproc)tee_traverse, /* tp_traverse */
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624 (inquiry)tee_clear, /* tp_clear */
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625 0, /* tp_richcompare */
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diff changeset
626 offsetof(teeobject, weakreflist), /* tp_weaklistoffset */
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diff changeset
627 PyObject_SelfIter, /* tp_iter */
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628 (iternextfunc)tee_next, /* tp_iternext */
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diff changeset
629 tee_methods, /* tp_methods */
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diff changeset
630 0, /* tp_members */
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diff changeset
631 0, /* tp_getset */
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diff changeset
632 0, /* tp_base */
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diff changeset
633 0, /* tp_dict */
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diff changeset
634 0, /* tp_descr_get */
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635 0, /* tp_descr_set */
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636 0, /* tp_dictoffset */
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637 0, /* tp_init */
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638 0, /* tp_alloc */
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diff changeset
639 tee_new, /* tp_new */
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diff changeset
640 PyObject_GC_Del, /* tp_free */
30764
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diff changeset
641 };
b948e775a79e Added itertools.tee()
Raymond Hettinger <python@rcn.com>
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diff changeset
642
30900
3096fab2a19c Improve the implementation of itertools.tee().
Raymond Hettinger <python@rcn.com>
parents: 30800
diff changeset
643 static PyObject *
3096fab2a19c Improve the implementation of itertools.tee().
Raymond Hettinger <python@rcn.com>
parents: 30800
diff changeset
644 tee(PyObject *self, PyObject *args)
3096fab2a19c Improve the implementation of itertools.tee().
Raymond Hettinger <python@rcn.com>
parents: 30800
diff changeset
645 {
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diff changeset
646 Py_ssize_t i, n=2;
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647 PyObject *it, *iterable, *copyable, *result;
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648
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649 if (!PyArg_ParseTuple(args, "O|n", &iterable, &n))
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650 return NULL;
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651 if (n < 0) {
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652 PyErr_SetString(PyExc_ValueError, "n must be >= 0");
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653 return NULL;
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diff changeset
654 }
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655 result = PyTuple_New(n);
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656 if (result == NULL)
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657 return NULL;
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658 if (n == 0)
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659 return result;
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diff changeset
660 it = PyObject_GetIter(iterable);
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661 if (it == NULL) {
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662 Py_DECREF(result);
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663 return NULL;
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664 }
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665 if (!PyObject_HasAttrString(it, "__copy__")) {
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666 copyable = tee_fromiterable(it);
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667 Py_DECREF(it);
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668 if (copyable == NULL) {
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669 Py_DECREF(result);
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670 return NULL;
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671 }
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672 } else
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diff changeset
673 copyable = it;
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674 PyTuple_SET_ITEM(result, 0, copyable);
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675 for (i=1 ; i<n ; i++) {
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676 copyable = PyObject_CallMethod(copyable, "__copy__", NULL);
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677 if (copyable == NULL) {
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678 Py_DECREF(result);
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679 return NULL;
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680 }
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681 PyTuple_SET_ITEM(result, i, copyable);
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682 }
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683 return result;
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684 }
3096fab2a19c Improve the implementation of itertools.tee().
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685
3096fab2a19c Improve the implementation of itertools.tee().
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parents: 30800
diff changeset
686 PyDoc_STRVAR(tee_doc,
3096fab2a19c Improve the implementation of itertools.tee().
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parents: 30800
diff changeset
687 "tee(iterable, n=2) --> tuple of n independent iterators.");
3096fab2a19c Improve the implementation of itertools.tee().
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parents: 30800
diff changeset
688
3096fab2a19c Improve the implementation of itertools.tee().
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parents: 30800
diff changeset
689
28024
61fa6b55c1de User requested changes to the itertools module.
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690 /* cycle object **********************************************************/
61fa6b55c1de User requested changes to the itertools module.
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diff changeset
691
61fa6b55c1de User requested changes to the itertools module.
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692 typedef struct {
61465
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693 PyObject_HEAD
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694 PyObject *it;
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695 PyObject *saved;
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696 int firstpass;
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Raymond Hettinger <python@rcn.com>
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697 } cycleobject;
61fa6b55c1de User requested changes to the itertools module.
Raymond Hettinger <python@rcn.com>
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698
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Raymond Hettinger <python@rcn.com>
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699 static PyTypeObject cycle_type;
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700
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701 static PyObject *
61fa6b55c1de User requested changes to the itertools module.
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diff changeset
702 cycle_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
61fa6b55c1de User requested changes to the itertools module.
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parents: 27770
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703 {
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704 PyObject *it;
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705 PyObject *iterable;
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706 PyObject *saved;
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diff changeset
707 cycleobject *lz;
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diff changeset
708
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709 if (type == &cycle_type && !_PyArg_NoKeywords("cycle()", kwds))
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710 return NULL;
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diff changeset
711
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712 if (!PyArg_UnpackTuple(args, "cycle", 1, 1, &iterable))
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diff changeset
713 return NULL;
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714
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diff changeset
715 /* Get iterator. */
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diff changeset
716 it = PyObject_GetIter(iterable);
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717 if (it == NULL)
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718 return NULL;
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719
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720 saved = PyList_New(0);
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721 if (saved == NULL) {
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722 Py_DECREF(it);
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723 return NULL;
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724 }
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725
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726 /* create cycleobject structure */
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diff changeset
727 lz = (cycleobject *)type->tp_alloc(type, 0);
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728 if (lz == NULL) {
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729 Py_DECREF(it);
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730 Py_DECREF(saved);
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731 return NULL;
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732 }
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733 lz->it = it;
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734 lz->saved = saved;
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735 lz->firstpass = 0;
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736
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737 return (PyObject *)lz;
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parents: 27770
diff changeset
738 }
61fa6b55c1de User requested changes to the itertools module.
Raymond Hettinger <python@rcn.com>
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diff changeset
739
61fa6b55c1de User requested changes to the itertools module.
Raymond Hettinger <python@rcn.com>
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diff changeset
740 static void
61fa6b55c1de User requested changes to the itertools module.
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741 cycle_dealloc(cycleobject *lz)
61fa6b55c1de User requested changes to the itertools module.
Raymond Hettinger <python@rcn.com>
parents: 27770
diff changeset
742 {
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743 PyObject_GC_UnTrack(lz);
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744 Py_XDECREF(lz->saved);
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745 Py_XDECREF(lz->it);
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diff changeset
746 Py_TYPE(lz)->tp_free(lz);
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747 }
61fa6b55c1de User requested changes to the itertools module.
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748
61fa6b55c1de User requested changes to the itertools module.
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diff changeset
749 static int
61fa6b55c1de User requested changes to the itertools module.
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750 cycle_traverse(cycleobject *lz, visitproc visit, void *arg)
61fa6b55c1de User requested changes to the itertools module.
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parents: 27770
diff changeset
751 {
61465
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752 Py_VISIT(lz->it);
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753 Py_VISIT(lz->saved);
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754 return 0;
28024
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Raymond Hettinger <python@rcn.com>
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755 }
61fa6b55c1de User requested changes to the itertools module.
Raymond Hettinger <python@rcn.com>
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756
61fa6b55c1de User requested changes to the itertools module.
Raymond Hettinger <python@rcn.com>
parents: 27770
diff changeset
757 static PyObject *
61fa6b55c1de User requested changes to the itertools module.
Raymond Hettinger <python@rcn.com>
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diff changeset
758 cycle_next(cycleobject *lz)
61fa6b55c1de User requested changes to the itertools module.
Raymond Hettinger <python@rcn.com>
parents: 27770
diff changeset
759 {
61465
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diff changeset
760 PyObject *item;
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diff changeset
761 PyObject *it;
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diff changeset
762 PyObject *tmp;
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763
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diff changeset
764 while (1) {
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765 item = PyIter_Next(lz->it);
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diff changeset
766 if (item != NULL) {
61463
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diff changeset
767 if (!lz->firstpass && PyList_Append(lz->saved, item)) {
fd25030223b0 Untabify C files. Will watch buildbots.
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diff changeset
768 Py_DECREF(item);
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769 return NULL;
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diff changeset
770 }
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771 return item;
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772 }
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773 if (PyErr_Occurred()) {
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774 if (PyErr_ExceptionMatches(PyExc_StopIteration))
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775 PyErr_Clear();
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776 else
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777 return NULL;
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778 }
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779 if (PyList_Size(lz->saved) == 0)
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780 return NULL;
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781 it = PyObject_GetIter(lz->saved);
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782 if (it == NULL)
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783 return NULL;
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784 tmp = lz->it;
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785 lz->it = it;
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786 lz->firstpass = 1;
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787 Py_DECREF(tmp);
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788 }
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789 }
61fa6b55c1de User requested changes to the itertools module.
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790
61fa6b55c1de User requested changes to the itertools module.
Raymond Hettinger <python@rcn.com>
parents: 27770
diff changeset
791 PyDoc_STRVAR(cycle_doc,
61fa6b55c1de User requested changes to the itertools module.
Raymond Hettinger <python@rcn.com>
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diff changeset
792 "cycle(iterable) --> cycle object\n\
61fa6b55c1de User requested changes to the itertools module.
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diff changeset
793 \n\
61fa6b55c1de User requested changes to the itertools module.
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diff changeset
794 Return elements from the iterable until it is exhausted.\n\
61fa6b55c1de User requested changes to the itertools module.
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diff changeset
795 Then repeat the sequence indefinitely.");
61fa6b55c1de User requested changes to the itertools module.
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diff changeset
796
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797 static PyTypeObject cycle_type = {
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798 PyVarObject_HEAD_INIT(NULL, 0)
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diff changeset
799 "itertools.cycle", /* tp_name */
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diff changeset
800 sizeof(cycleobject), /* tp_basicsize */
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801 0, /* tp_itemsize */
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diff changeset
802 /* methods */
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diff changeset
803 (destructor)cycle_dealloc, /* tp_dealloc */
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804 0, /* tp_print */
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805 0, /* tp_getattr */
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806 0, /* tp_setattr */
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807 0, /* tp_compare */
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808 0, /* tp_repr */
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809 0, /* tp_as_number */
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810 0, /* tp_as_sequence */
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811 0, /* tp_as_mapping */
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812 0, /* tp_hash */
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813 0, /* tp_call */
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814 0, /* tp_str */
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815 PyObject_GenericGetAttr, /* tp_getattro */
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816 0, /* tp_setattro */
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817 0, /* tp_as_buffer */
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818 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
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819 Py_TPFLAGS_BASETYPE, /* tp_flags */
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diff changeset
820 cycle_doc, /* tp_doc */
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821 (traverseproc)cycle_traverse, /* tp_traverse */
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822 0, /* tp_clear */
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823 0, /* tp_richcompare */
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824 0, /* tp_weaklistoffset */
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825 PyObject_SelfIter, /* tp_iter */
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826 (iternextfunc)cycle_next, /* tp_iternext */
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827 0, /* tp_methods */
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828 0, /* tp_members */
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829 0, /* tp_getset */
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830 0, /* tp_base */
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831 0, /* tp_dict */
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832 0, /* tp_descr_get */
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833 0, /* tp_descr_set */
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834 0, /* tp_dictoffset */
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835 0, /* tp_init */
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836 0, /* tp_alloc */
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837 cycle_new, /* tp_new */
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838 PyObject_GC_Del, /* tp_free */
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839 };
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840
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841
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842 /* dropwhile object **********************************************************/
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843
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844 typedef struct {
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845 PyObject_HEAD
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846 PyObject *func;
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847 PyObject *it;
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848 long start;
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849 } dropwhileobject;
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850
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851 static PyTypeObject dropwhile_type;
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852
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853 static PyObject *
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854 dropwhile_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
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855 {
61465
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856 PyObject *func, *seq;
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857 PyObject *it;
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858 dropwhileobject *lz;
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859
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860 if (type == &dropwhile_type && !_PyArg_NoKeywords("dropwhile()", kwds))
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861 return NULL;
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862
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863 if (!PyArg_UnpackTuple(args, "dropwhile", 2, 2, &func, &seq))
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864 return NULL;
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865
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866 /* Get iterator. */
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867 it = PyObject_GetIter(seq);
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868 if (it == NULL)
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869 return NULL;
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870
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871 /* create dropwhileobject structure */
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872 lz = (dropwhileobject *)type->tp_alloc(type, 0);
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873 if (lz == NULL) {
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874 Py_DECREF(it);
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875 return NULL;
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876 }
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877 Py_INCREF(func);
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878 lz->func = func;
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879 lz->it = it;
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880 lz->start = 0;
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881
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882 return (PyObject *)lz;
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883 }
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884
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885 static void
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886 dropwhile_dealloc(dropwhileobject *lz)
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887 {
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888 PyObject_GC_UnTrack(lz);
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889 Py_XDECREF(lz->func);
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diff changeset
890 Py_XDECREF(lz->it);
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891 Py_TYPE(lz)->tp_free(lz);
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892 }
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893
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894 static int
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895 dropwhile_traverse(dropwhileobject *lz, visitproc visit, void *arg)
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896 {
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897 Py_VISIT(lz->it);
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898 Py_VISIT(lz->func);
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899 return 0;
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900 }
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901
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902 static PyObject *
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903 dropwhile_next(dropwhileobject *lz)
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904 {
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905 PyObject *item, *good;
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906 PyObject *it = lz->it;
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907 long ok;
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908 PyObject *(*iternext)(PyObject *);
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909
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910 iternext = *Py_TYPE(it)->tp_iternext;
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diff changeset
911 for (;;) {
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912 item = iternext(it);
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913 if (item == NULL)
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914 return NULL;
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915 if (lz->start == 1)
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916 return item;
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917
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918 good = PyObject_CallFunctionObjArgs(lz->func, item, NULL);
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919 if (good == NULL) {
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920 Py_DECREF(item);
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921 return NULL;
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922 }
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923 ok = PyObject_IsTrue(good);
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924 Py_DECREF(good);
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925 if (ok == 0) {
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926 lz->start = 1;
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927 return item;
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928 }
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929 Py_DECREF(item);
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930 if (ok < 0)
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931 return NULL;
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932 }
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933 }
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934
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935 PyDoc_STRVAR(dropwhile_doc,
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936 "dropwhile(predicate, iterable) --> dropwhile object\n\
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937 \n\
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938 Drop items from the iterable while predicate(item) is true.\n\
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939 Afterwards, return every element until the iterable is exhausted.");
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940
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941 static PyTypeObject dropwhile_type = {
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942 PyVarObject_HEAD_INIT(NULL, 0)
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943 "itertools.dropwhile", /* tp_name */
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944 sizeof(dropwhileobject), /* tp_basicsize */
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945 0, /* tp_itemsize */
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diff changeset
946 /* methods */
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diff changeset
947 (destructor)dropwhile_dealloc, /* tp_dealloc */
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diff changeset
948 0, /* tp_print */
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949 0, /* tp_getattr */
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950 0, /* tp_setattr */
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951 0, /* tp_compare */
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952 0, /* tp_repr */
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953 0, /* tp_as_number */
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954 0, /* tp_as_sequence */
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955 0, /* tp_as_mapping */
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956 0, /* tp_hash */
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957 0, /* tp_call */
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958 0, /* tp_str */
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959 PyObject_GenericGetAttr, /* tp_getattro */
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960 0, /* tp_setattro */
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961 0, /* tp_as_buffer */
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962 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
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963 Py_TPFLAGS_BASETYPE, /* tp_flags */
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964 dropwhile_doc, /* tp_doc */
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965 (traverseproc)dropwhile_traverse, /* tp_traverse */
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966 0, /* tp_clear */
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967 0, /* tp_richcompare */
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968 0, /* tp_weaklistoffset */
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969 PyObject_SelfIter, /* tp_iter */
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970 (iternextfunc)dropwhile_next, /* tp_iternext */
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971 0, /* tp_methods */
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972 0, /* tp_members */
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973 0, /* tp_getset */
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974 0, /* tp_base */
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975 0, /* tp_dict */
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976 0, /* tp_descr_get */
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977 0, /* tp_descr_set */
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978 0, /* tp_dictoffset */
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979 0, /* tp_init */
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980 0, /* tp_alloc */
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981 dropwhile_new, /* tp_new */
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982 PyObject_GC_Del, /* tp_free */
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983 };
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984
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985
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986 /* takewhile object **********************************************************/
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987
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988 typedef struct {
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989 PyObject_HEAD
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990 PyObject *func;
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991 PyObject *it;
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992 long stop;
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993 } takewhileobject;
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994
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995 static PyTypeObject takewhile_type;
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996
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997 static PyObject *
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998 takewhile_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
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999 {
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1000 PyObject *func, *seq;
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1001 PyObject *it;
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1002 takewhileobject *lz;
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1003
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1004 if (type == &takewhile_type && !_PyArg_NoKeywords("takewhile()", kwds))
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1005 return NULL;
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1006
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1007 if (!PyArg_UnpackTuple(args, "takewhile", 2, 2, &func, &seq))
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1008 return NULL;
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1009
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1010 /* Get iterator. */
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1011 it = PyObject_GetIter(seq);
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1012 if (it == NULL)
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1013 return NULL;
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1014
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1015 /* create takewhileobject structure */
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1016 lz = (takewhileobject *)type->tp_alloc(type, 0);
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1017 if (lz == NULL) {
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1018 Py_DECREF(it);
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1019 return NULL;
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1020 }
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1021 Py_INCREF(func);
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1022 lz->func = func;
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1023 lz->it = it;
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1024 lz->stop = 0;
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1025
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1026 return (PyObject *)lz;
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1027 }
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1028
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1029 static void
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1030 takewhile_dealloc(takewhileobject *lz)
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1031 {
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1032 PyObject_GC_UnTrack(lz);
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1033 Py_XDECREF(lz->func);
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1034 Py_XDECREF(lz->it);
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1035 Py_TYPE(lz)->tp_free(lz);
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1036 }
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1037
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1038 static int
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1039 takewhile_traverse(takewhileobject *lz, visitproc visit, void *arg)
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1040 {
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1041 Py_VISIT(lz->it);
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1042 Py_VISIT(lz->func);
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1043 return 0;
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1044 }
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1045
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1046 static PyObject *
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1047 takewhile_next(takewhileobject *lz)
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1048 {
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1049 PyObject *item, *good;
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1050 PyObject *it = lz->it;
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1051 long ok;
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1052
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1053 if (lz->stop == 1)
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1054 return NULL;
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1055
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1056 item = (*Py_TYPE(it)->tp_iternext)(it);
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1057 if (item == NULL)
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1058 return NULL;
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1059
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1060 good = PyObject_CallFunctionObjArgs(lz->func, item, NULL);
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1061 if (good == NULL) {
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1062 Py_DECREF(item);
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1063 return NULL;
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1064 }
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1065 ok = PyObject_IsTrue(good);
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1066 Py_DECREF(good);
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1067 if (ok > 0)
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1068 return item;
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1069 Py_DECREF(item);
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1070 if (ok == 0)
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1071 lz->stop = 1;
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1072 return NULL;
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1073 }
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1074
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1075 PyDoc_STRVAR(takewhile_doc,
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1076 "takewhile(predicate, iterable) --> takewhile object\n\
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1077 \n\
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1078 Return successive entries from an iterable as long as the \n\
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1079 predicate evaluates to true for each entry.");
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diff changeset
1080
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diff changeset
1081 static PyTypeObject takewhile_type = {
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1082 PyVarObject_HEAD_INIT(NULL, 0)
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1083 "itertools.takewhile", /* tp_name */
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diff changeset
1084 sizeof(takewhileobject), /* tp_basicsize */
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1085 0, /* tp_itemsize */
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1086 /* methods */
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diff changeset
1087 (destructor)takewhile_dealloc, /* tp_dealloc */
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1088 0, /* tp_print */
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1089 0, /* tp_getattr */
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1090 0, /* tp_setattr */
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1091 0, /* tp_compare */
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1092 0, /* tp_repr */
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1093 0, /* tp_as_number */
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1094 0, /* tp_as_sequence */
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1095 0, /* tp_as_mapping */
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1096 0, /* tp_hash */
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1097 0, /* tp_call */
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1098 0, /* tp_str */
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diff changeset
1099 PyObject_GenericGetAttr, /* tp_getattro */
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1100 0, /* tp_setattro */
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1101 0, /* tp_as_buffer */
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1102 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
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1103 Py_TPFLAGS_BASETYPE, /* tp_flags */
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diff changeset
1104 takewhile_doc, /* tp_doc */
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diff changeset
1105 (traverseproc)takewhile_traverse, /* tp_traverse */
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1106 0, /* tp_clear */
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1107 0, /* tp_richcompare */
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1108 0, /* tp_weaklistoffset */
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1109 PyObject_SelfIter, /* tp_iter */
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1110 (iternextfunc)takewhile_next, /* tp_iternext */
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1111 0, /* tp_methods */
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1112 0, /* tp_members */
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1113 0, /* tp_getset */
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1114 0, /* tp_base */
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1115 0, /* tp_dict */
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1116 0, /* tp_descr_get */
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1117 0, /* tp_descr_set */
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1118 0, /* tp_dictoffset */
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1119 0, /* tp_init */
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1120 0, /* tp_alloc */
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1121 takewhile_new, /* tp_new */
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1122 PyObject_GC_Del, /* tp_free */
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1123 };
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1124
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1125
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1126 /* islice object ************************************************************/
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1127
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1128 typedef struct {
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1129 PyObject_HEAD
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1130 PyObject *it;
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1131 Py_ssize_t next;
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1132 Py_ssize_t stop;
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1133 Py_ssize_t step;
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1134 Py_ssize_t cnt;
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1135 } isliceobject;
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1136
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diff changeset
1137 static PyTypeObject islice_type;
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1138
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diff changeset
1139 static PyObject *
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1140 islice_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
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1141 {
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1142 PyObject *seq;
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1143 Py_ssize_t start=0, stop=-1, step=1;
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1144 PyObject *it, *a1=NULL, *a2=NULL, *a3=NULL;
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1145 Py_ssize_t numargs;
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1146 isliceobject *lz;
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1147
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1148 if (type == &islice_type && !_PyArg_NoKeywords("islice()", kwds))
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1149 return NULL;
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1150
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1151 if (!PyArg_UnpackTuple(args, "islice", 2, 4, &seq, &a1, &a2, &a3))
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1152 return NULL;
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1153
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1154 numargs = PyTuple_Size(args);
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1155 if (numargs == 2) {
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1156 if (a1 != Py_None) {
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1157 stop = PyInt_AsSsize_t(a1);
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1158 if (stop == -1) {
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1159 if (PyErr_Occurred())
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1160 PyErr_Clear();
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1161 PyErr_SetString(PyExc_ValueError,
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1162 "Stop argument for islice() must be None or an integer: 0 <= x <= maxint.");
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1163 return NULL;
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1164 }
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1165 }
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1166 } else {
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1167 if (a1 != Py_None)
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1168 start = PyInt_AsSsize_t(a1);
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1169 if (start == -1 && PyErr_Occurred())
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1170 PyErr_Clear();
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1171 if (a2 != Py_None) {
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1172 stop = PyInt_AsSsize_t(a2);
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1173 if (stop == -1) {
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1174 if (PyErr_Occurred())
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1175 PyErr_Clear();
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1176 PyErr_SetString(PyExc_ValueError,
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1177 "Stop argument for islice() must be None or an integer: 0 <= x <= maxint.");
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1178 return NULL;
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1179 }
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1180 }
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1181 }
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1182 if (start<0 || stop<-1) {
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1183 PyErr_SetString(PyExc_ValueError,
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1184 "Indices for islice() must be None or an integer: 0 <= x <= maxint.");
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1185 return NULL;
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1186 }
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1187
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1188 if (a3 != NULL) {
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1189 if (a3 != Py_None)
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1190 step = PyInt_AsSsize_t(a3);
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1191 if (step == -1 && PyErr_Occurred())
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1192 PyErr_Clear();
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1193 }
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1194 if (step<1) {
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1195 PyErr_SetString(PyExc_ValueError,
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1196 "Step for islice() must be a positive integer or None.");
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1197 return NULL;
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1198 }
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1199
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1200 /* Get iterator. */
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1201 it = PyObject_GetIter(seq);
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1202 if (it == NULL)
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1203 return NULL;
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1204
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1205 /* create isliceobject structure */
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1206 lz = (isliceobject *)type->tp_alloc(type, 0);
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1207 if (lz == NULL) {
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1208 Py_DECREF(it);
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1209 return NULL;
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1210 }
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1211 lz->it = it;
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1212 lz->next = start;
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1213 lz->stop = stop;
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1214 lz->step = step;
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1215 lz->cnt = 0L;
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1216
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diff changeset
1217 return (PyObject *)lz;
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1218 }
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1219
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1220 static void
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1221 islice_dealloc(isliceobject *lz)
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diff changeset
1222 {
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1223 PyObject_GC_UnTrack(lz);
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1224 Py_XDECREF(lz->it);
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diff changeset
1225 Py_TYPE(lz)->tp_free(lz);
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diff changeset
1226 }
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diff changeset
1227
ba57c3daf6e9 Move itertools module from the sandbox and into production.
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diff changeset
1228 static int
ba57c3daf6e9 Move itertools module from the sandbox and into production.
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1229 islice_traverse(isliceobject *lz, visitproc visit, void *arg)
ba57c3daf6e9 Move itertools module from the sandbox and into production.
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diff changeset
1230 {
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1231 Py_VISIT(lz->it);
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1232 return 0;
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1233 }
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1234
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1235 static PyObject *
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1236 islice_next(isliceobject *lz)
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diff changeset
1237 {
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1238 PyObject *item;
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diff changeset
1239 PyObject *it = lz->it;
66549
ed4bfb75d28d Issue #10323: Predictable final state for slice().
Raymond Hettinger <python@rcn.com>
parents: 62237
diff changeset
1240 Py_ssize_t stop = lz->stop;
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diff changeset
1241 Py_ssize_t oldnext;
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1242 PyObject *(*iternext)(PyObject *);
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1243
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1244 iternext = *Py_TYPE(it)->tp_iternext;
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1245 while (lz->cnt < lz->next) {
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1246 item = iternext(it);
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1247 if (item == NULL)
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1248 return NULL;
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1249 Py_DECREF(item);
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1250 lz->cnt++;
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1251 }
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ed4bfb75d28d Issue #10323: Predictable final state for slice().
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1252 if (stop != -1 && lz->cnt >= stop)
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1253 return NULL;
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1254 item = iternext(it);
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1255 if (item == NULL)
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1256 return NULL;
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1257 lz->cnt++;
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diff changeset
1258 oldnext = lz->next;
72461
5a1cb8506cea Backport issue #12973 itertools fix from 3.x.
Mark Dickinson <mdickinson@enthought.com>
parents: 68256
diff changeset
1259 /* The (size_t) cast below avoids the danger of undefined
5a1cb8506cea Backport issue #12973 itertools fix from 3.x.
Mark Dickinson <mdickinson@enthought.com>
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diff changeset
1260 behaviour from signed integer overflow. */
5a1cb8506cea Backport issue #12973 itertools fix from 3.x.
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parents: 68256
diff changeset
1261 lz->next += (size_t)lz->step;
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diff changeset
1262 if (lz->next < oldnext || (stop != -1 && lz->next > stop))
ed4bfb75d28d Issue #10323: Predictable final state for slice().
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diff changeset
1263 lz->next = stop;
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1264 return item;
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1265 }
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1266
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1267 PyDoc_STRVAR(islice_doc,
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1268 "islice(iterable, [start,] stop [, step]) --> islice object\n\
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1269 \n\
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1270 Return an iterator whose next() method returns selected values from an\n\
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1271 iterable. If start is specified, will skip all preceding elements;\n\
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1272 otherwise, start defaults to zero. Step defaults to one. If\n\
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1273 specified as another value, step determines how many values are \n\
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1274 skipped between successive calls. Works like a slice() on a list\n\
ba57c3daf6e9 Move itertools module from the sandbox and into production.
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diff changeset
1275 but returns an iterator.");
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1276
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diff changeset
1277 static PyTypeObject islice_type = {
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1278 PyVarObject_HEAD_INIT(NULL, 0)
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1279 "itertools.islice", /* tp_name */
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diff changeset
1280 sizeof(isliceobject), /* tp_basicsize */
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diff changeset
1281 0, /* tp_itemsize */
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diff changeset
1282 /* methods */
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diff changeset
1283 (destructor)islice_dealloc, /* tp_dealloc */
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1284 0, /* tp_print */
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diff changeset
1285 0, /* tp_getattr */
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1286 0, /* tp_setattr */
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1287 0, /* tp_compare */
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diff changeset
1288 0, /* tp_repr */
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diff changeset
1289 0, /* tp_as_number */
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diff changeset
1290 0, /* tp_as_sequence */
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1291 0, /* tp_as_mapping */
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diff changeset
1292 0, /* tp_hash */
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diff changeset
1293 0, /* tp_call */
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diff changeset
1294 0, /* tp_str */
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diff changeset
1295 PyObject_GenericGetAttr, /* tp_getattro */
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diff changeset
1296 0, /* tp_setattro */
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diff changeset
1297 0, /* tp_as_buffer */
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diff changeset
1298 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
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diff changeset
1299 Py_TPFLAGS_BASETYPE, /* tp_flags */
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diff changeset
1300 islice_doc, /* tp_doc */
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diff changeset
1301 (traverseproc)islice_traverse, /* tp_traverse */
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diff changeset
1302 0, /* tp_clear */
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1303 0, /* tp_richcompare */
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diff changeset
1304 0, /* tp_weaklistoffset */
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diff changeset
1305 PyObject_SelfIter, /* tp_iter */
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diff changeset
1306 (iternextfunc)islice_next, /* tp_iternext */
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1307 0, /* tp_methods */
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1308 0, /* tp_members */
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diff changeset
1309 0, /* tp_getset */
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1310 0, /* tp_base */
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1311 0, /* tp_dict */
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1312 0, /* tp_descr_get */
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diff changeset
1313 0, /* tp_descr_set */
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diff changeset
1314 0, /* tp_dictoffset */
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1315 0, /* tp_init */
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1316 0, /* tp_alloc */
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diff changeset
1317 islice_new, /* tp_new */
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1318 PyObject_GC_Del, /* tp_free */
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1319 };
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1320
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1321
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1322 /* starmap object ************************************************************/
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1323
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1324 typedef struct {
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1325 PyObject_HEAD
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1326 PyObject *func;
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1327 PyObject *it;
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1328 } starmapobject;
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1329
29850
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1330 static PyTypeObject starmap_type;
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1331
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1332 static PyObject *
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1333 starmap_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
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1334 {
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1335 PyObject *func, *seq;
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1336 PyObject *it;
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1337 starmapobject *lz;
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1338
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1339 if (type == &starmap_type && !_PyArg_NoKeywords("starmap()", kwds))
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1340 return NULL;
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1341
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1342 if (!PyArg_UnpackTuple(args, "starmap", 2, 2, &func, &seq))
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1343 return NULL;
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1344
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1345 /* Get iterator. */
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1346 it = PyObject_GetIter(seq);
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1347 if (it == NULL)
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1348 return NULL;
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1349
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1350 /* create starmapobject structure */
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1351 lz = (starmapobject *)type->tp_alloc(type, 0);
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1352 if (lz == NULL) {
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1353 Py_DECREF(it);
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1354 return NULL;
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1355 }
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1356 Py_INCREF(func);
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1357 lz->func = func;
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1358 lz->it = it;
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1359
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1360 return (PyObject *)lz;
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1361 }
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1362
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1363 static void
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1364 starmap_dealloc(starmapobject *lz)
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1365 {
61465
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1366 PyObject_GC_UnTrack(lz);
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1367 Py_XDECREF(lz->func);
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1368 Py_XDECREF(lz->it);
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1369 Py_TYPE(lz)->tp_free(lz);
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1370 }
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1371
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1372 static int
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1373 starmap_traverse(starmapobject *lz, visitproc visit, void *arg)
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1374 {
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1375 Py_VISIT(lz->it);
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1376 Py_VISIT(lz->func);
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1377 return 0;
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1378 }
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1379
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1380 static PyObject *
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1381 starmap_next(starmapobject *lz)
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1382 {
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1383 PyObject *args;
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1384 PyObject *result;
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1385 PyObject *it = lz->it;
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1386
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1387 args = (*Py_TYPE(it)->tp_iternext)(it);
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1388 if (args == NULL)
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1389 return NULL;
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1390 if (!PyTuple_CheckExact(args)) {
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1391 PyObject *newargs = PySequence_Tuple(args);
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1392 Py_DECREF(args);
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1393 if (newargs == NULL)
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1394 return NULL;
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1395 args = newargs;
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1396 }
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1397 result = PyObject_Call(lz->func, args, NULL);
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1398 Py_DECREF(args);
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1399 return result;
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1400 }
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1401
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1402 PyDoc_STRVAR(starmap_doc,
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1403 "starmap(function, sequence) --> starmap object\n\
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1404 \n\
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1405 Return an iterator whose values are returned from the function evaluated\n\
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1406 with a argument tuple taken from the given sequence.");
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1407
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1408 static PyTypeObject starmap_type = {
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1409 PyVarObject_HEAD_INIT(NULL, 0)
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1410 "itertools.starmap", /* tp_name */
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1411 sizeof(starmapobject), /* tp_basicsize */
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1412 0, /* tp_itemsize */
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1413 /* methods */
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1414 (destructor)starmap_dealloc, /* tp_dealloc */
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1415 0, /* tp_print */
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1416 0, /* tp_getattr */
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1417 0, /* tp_setattr */
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1418 0, /* tp_compare */
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1419 0, /* tp_repr */
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1420 0, /* tp_as_number */
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1421 0, /* tp_as_sequence */
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1422 0, /* tp_as_mapping */
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1423 0, /* tp_hash */
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1424 0, /* tp_call */
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1425 0, /* tp_str */
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1426 PyObject_GenericGetAttr, /* tp_getattro */
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1427 0, /* tp_setattro */
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1428 0, /* tp_as_buffer */
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1429 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
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1430 Py_TPFLAGS_BASETYPE, /* tp_flags */
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1431 starmap_doc, /* tp_doc */
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1432 (traverseproc)starmap_traverse, /* tp_traverse */
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1433 0, /* tp_clear */
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1434 0, /* tp_richcompare */
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1435 0, /* tp_weaklistoffset */
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1436 PyObject_SelfIter, /* tp_iter */
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1437 (iternextfunc)starmap_next, /* tp_iternext */
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1438 0, /* tp_methods */
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1439 0, /* tp_members */
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1440 0, /* tp_getset */
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1441 0, /* tp_base */
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1442 0, /* tp_dict */
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1443 0, /* tp_descr_get */
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1444 0, /* tp_descr_set */
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1445 0, /* tp_dictoffset */
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1446 0, /* tp_init */
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1447 0, /* tp_alloc */
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1448 starmap_new, /* tp_new */
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1449 PyObject_GC_Del, /* tp_free */
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1450 };
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1451
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1452
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1453 /* imap object ************************************************************/
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1454
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1455 typedef struct {
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1456 PyObject_HEAD
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1457 PyObject *iters;
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1458 PyObject *func;
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1459 } imapobject;
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1460
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1461 static PyTypeObject imap_type;
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1462
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1463 static PyObject *
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1464 imap_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
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1465 {
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1466 PyObject *it, *iters, *func;
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1467 imapobject *lz;
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1468 Py_ssize_t numargs, i;
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1469
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1470 if (type == &imap_type && !_PyArg_NoKeywords("imap()", kwds))
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1471 return NULL;
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1472
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1473 numargs = PyTuple_Size(args);
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1474 if (numargs < 2) {
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1475 PyErr_SetString(PyExc_TypeError,
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1476 "imap() must have at least two arguments.");
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1477 return NULL;
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1478 }
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1479
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1480 iters = PyTuple_New(numargs-1);
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1481 if (iters == NULL)
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1482 return NULL;
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1483
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1484 for (i=1 ; i<numargs ; i++) {
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diff changeset
1485 /* Get iterator. */
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1486 it = PyObject_GetIter(PyTuple_GET_ITEM(args, i));
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1487 if (it == NULL) {
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1488 Py_DECREF(iters);
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1489 return NULL;
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1490 }
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1491 PyTuple_SET_ITEM(iters, i-1, it);
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1492 }
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1493
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1494 /* create imapobject structure */
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1495 lz = (imapobject *)type->tp_alloc(type, 0);
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1496 if (lz == NULL) {
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1497 Py_DECREF(iters);
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1498 return NULL;
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1499 }
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1500 lz->iters = iters;
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1501 func = PyTuple_GET_ITEM(args, 0);
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1502 Py_INCREF(func);
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1503 lz->func = func;
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1504
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1505 return (PyObject *)lz;
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1506 }
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1507
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1508 static void
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1509 imap_dealloc(imapobject *lz)
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1510 {
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1511 PyObject_GC_UnTrack(lz);
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1512 Py_XDECREF(lz->iters);
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1513 Py_XDECREF(lz->func);
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1514 Py_TYPE(lz)->tp_free(lz);
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1515 }
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1516
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1517 static int
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1518 imap_traverse(imapobject *lz, visitproc visit, void *arg)
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1519 {
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1520 Py_VISIT(lz->iters);
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1521 Py_VISIT(lz->func);
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1522 return 0;
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1523 }
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1524
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1525 /*
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1526 imap() is an iterator version of __builtins__.map() except that it does
941de791b17a SF bug #681003: itertools issues
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diff changeset
1527 not have the None fill-in feature. That was intentionally left out for
941de791b17a SF bug #681003: itertools issues
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diff changeset
1528 the following reasons:
941de791b17a SF bug #681003: itertools issues
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1529
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diff changeset
1530 1) Itertools are designed to be easily combined and chained together.
941de791b17a SF bug #681003: itertools issues
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diff changeset
1531 Having all tools stop with the shortest input is a unifying principle
941de791b17a SF bug #681003: itertools issues
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diff changeset
1532 that makes it easier to combine finite iterators (supplying data) with
941de791b17a SF bug #681003: itertools issues
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diff changeset
1533 infinite iterators like count() and repeat() (for supplying sequential
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diff changeset
1534 or constant arguments to a function).
941de791b17a SF bug #681003: itertools issues
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1535
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1536 2) In typical use cases for combining itertools, having one finite data
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1537 supplier run out before another is likely to be an error condition which
941de791b17a SF bug #681003: itertools issues
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1538 should not pass silently by automatically supplying None.
941de791b17a SF bug #681003: itertools issues
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1539
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1540 3) The use cases for automatic None fill-in are rare -- not many functions
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diff changeset
1541 do something useful when a parameter suddenly switches type and becomes
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diff changeset
1542 None.
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1543
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1544 4) If a need does arise, it can be met by __builtins__.map() or by
29535
c64687cd5b37 Minor updates:
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diff changeset
1545 writing: chain(iterable, repeat(None)).
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1546
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1547 5) Similar toolsets in Haskell and SML do not have automatic None fill-in.
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1548 */
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1549
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1550 static PyObject *
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1551 imap_next(imapobject *lz)
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1552 {
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1553 PyObject *val;
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1554 PyObject *argtuple;
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1555 PyObject *result;
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1556 Py_ssize_t numargs, i;
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1557
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1558 numargs = PyTuple_Size(lz->iters);
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1559 argtuple = PyTuple_New(numargs);
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1560 if (argtuple == NULL)
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1561 return NULL;
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1562
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1563 for (i=0 ; i<numargs ; i++) {
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1564 val = PyIter_Next(PyTuple_GET_ITEM(lz->iters, i));
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1565 if (val == NULL) {
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1566 Py_DECREF(argtuple);
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1567 return NULL;
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1568 }
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1569 PyTuple_SET_ITEM(argtuple, i, val);
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1570 }
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1571 if (lz->func == Py_None)
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1572 return argtuple;
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1573 result = PyObject_Call(lz->func, argtuple, NULL);
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1574 Py_DECREF(argtuple);
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1575 return result;
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1576 }
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1577
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1578 PyDoc_STRVAR(imap_doc,
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1579 "imap(func, *iterables) --> imap object\n\
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1580 \n\
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1581 Make an iterator that computes the function using arguments from\n\
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1582 each of the iterables. Like map() except that it returns\n\
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1583 an iterator instead of a list and that it stops when the shortest\n\
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1584 iterable is exhausted instead of filling in None for shorter\n\
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1585 iterables.");
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diff changeset
1586
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45dc33433323 SF patch #770521: make itertools type declarations static
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1587 static PyTypeObject imap_type = {
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1588 PyVarObject_HEAD_INIT(NULL, 0)
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1589 "itertools.imap", /* tp_name */
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1590 sizeof(imapobject), /* tp_basicsize */
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1591 0, /* tp_itemsize */
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1592 /* methods */
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1593 (destructor)imap_dealloc, /* tp_dealloc */
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1594 0, /* tp_print */
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1595 0, /* tp_getattr */
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1596 0, /* tp_setattr */
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1597 0, /* tp_compare */
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1598 0, /* tp_repr */
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1599 0, /* tp_as_number */
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1600 0, /* tp_as_sequence */
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1601 0, /* tp_as_mapping */
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1602 0, /* tp_hash */
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1603 0, /* tp_call */
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1604 0, /* tp_str */
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1605 PyObject_GenericGetAttr, /* tp_getattro */
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1606 0, /* tp_setattro */
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diff changeset
1607 0, /* tp_as_buffer */
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diff changeset
1608 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1609 Py_TPFLAGS_BASETYPE, /* tp_flags */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1610 imap_doc, /* tp_doc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1611 (traverseproc)imap_traverse, /* tp_traverse */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1612 0, /* tp_clear */
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parents: 57521
diff changeset
1613 0, /* tp_richcompare */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1614 0, /* tp_weaklistoffset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1615 PyObject_SelfIter, /* tp_iter */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1616 (iternextfunc)imap_next, /* tp_iternext */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1617 0, /* tp_methods */
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parents: 57521
diff changeset
1618 0, /* tp_members */
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parents: 57521
diff changeset
1619 0, /* tp_getset */
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parents: 57521
diff changeset
1620 0, /* tp_base */
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parents: 57521
diff changeset
1621 0, /* tp_dict */
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parents: 57521
diff changeset
1622 0, /* tp_descr_get */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1623 0, /* tp_descr_set */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1624 0, /* tp_dictoffset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1625 0, /* tp_init */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1626 0, /* tp_alloc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1627 imap_new, /* tp_new */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1628 PyObject_GC_Del, /* tp_free */
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1629 };
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1630
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1631
28024
61fa6b55c1de User requested changes to the itertools module.
Raymond Hettinger <python@rcn.com>
parents: 27770
diff changeset
1632 /* chain object ************************************************************/
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1633
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1634 typedef struct {
61465
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diff changeset
1635 PyObject_HEAD
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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diff changeset
1636 PyObject *source; /* Iterator over input iterables */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1637 PyObject *active; /* Currently running input iterator */
28024
61fa6b55c1de User requested changes to the itertools module.
Raymond Hettinger <python@rcn.com>
parents: 27770
diff changeset
1638 } chainobject;
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1639
29850
45dc33433323 SF patch #770521: make itertools type declarations static
Raymond Hettinger <python@rcn.com>
parents: 29535
diff changeset
1640 static PyTypeObject chain_type;
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1641
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1642 static PyObject *
45562
43e084847e53 Have itertools.chain() consume its inputs lazily instead of building a tuple of iterators at the outset.
Raymond Hettinger <python@rcn.com>
parents: 45547
diff changeset
1643 chain_new_internal(PyTypeObject *type, PyObject *source)
43e084847e53 Have itertools.chain() consume its inputs lazily instead of building a tuple of iterators at the outset.
Raymond Hettinger <python@rcn.com>
parents: 45547
diff changeset
1644 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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diff changeset
1645 chainobject *lz;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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diff changeset
1646
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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diff changeset
1647 lz = (chainobject *)type->tp_alloc(type, 0);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1648 if (lz == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1649 Py_DECREF(source);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1650 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1651 }
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parents: 57521
diff changeset
1652
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1653 lz->source = source;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1654 lz->active = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1655 return (PyObject *)lz;
45562
43e084847e53 Have itertools.chain() consume its inputs lazily instead of building a tuple of iterators at the outset.
Raymond Hettinger <python@rcn.com>
parents: 45547
diff changeset
1656 }
43e084847e53 Have itertools.chain() consume its inputs lazily instead of building a tuple of iterators at the outset.
Raymond Hettinger <python@rcn.com>
parents: 45547
diff changeset
1657
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1658 static PyObject *
28024
61fa6b55c1de User requested changes to the itertools module.
Raymond Hettinger <python@rcn.com>
parents: 27770
diff changeset
1659 chain_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1660 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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diff changeset
1661 PyObject *source;
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diff changeset
1662
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1663 if (type == &chain_type && !_PyArg_NoKeywords("chain()", kwds))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1664 return NULL;
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parents: 57521
diff changeset
1665
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1666 source = PyObject_GetIter(args);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1667 if (source == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1668 return NULL;
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diff changeset
1669
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1670 return chain_new_internal(type, source);
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1671 }
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1672
45563
7da36b49c9e5 Add alternate constructor for itertools.chain().
Raymond Hettinger <python@rcn.com>
parents: 45562
diff changeset
1673 static PyObject *
7da36b49c9e5 Add alternate constructor for itertools.chain().
Raymond Hettinger <python@rcn.com>
parents: 45562
diff changeset
1674 chain_new_from_iterable(PyTypeObject *type, PyObject *arg)
7da36b49c9e5 Add alternate constructor for itertools.chain().
Raymond Hettinger <python@rcn.com>
parents: 45562
diff changeset
1675 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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diff changeset
1676 PyObject *source;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1677
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1678 source = PyObject_GetIter(arg);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1679 if (source == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1680 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1681
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1682 return chain_new_internal(type, source);
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1683 }
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1684
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1685 static void
28024
61fa6b55c1de User requested changes to the itertools module.
Raymond Hettinger <python@rcn.com>
parents: 27770
diff changeset
1686 chain_dealloc(chainobject *lz)
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1687 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1688 PyObject_GC_UnTrack(lz);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1689 Py_XDECREF(lz->active);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1690 Py_XDECREF(lz->source);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1691 Py_TYPE(lz)->tp_free(lz);
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1692 }
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1693
27747
941de791b17a SF bug #681003: itertools issues
Raymond Hettinger <python@rcn.com>
parents: 27570
diff changeset
1694 static int
28024
61fa6b55c1de User requested changes to the itertools module.
Raymond Hettinger <python@rcn.com>
parents: 27770
diff changeset
1695 chain_traverse(chainobject *lz, visitproc visit, void *arg)
27747
941de791b17a SF bug #681003: itertools issues
Raymond Hettinger <python@rcn.com>
parents: 27570
diff changeset
1696 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1697 Py_VISIT(lz->source);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1698 Py_VISIT(lz->active);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1699 return 0;
27747
941de791b17a SF bug #681003: itertools issues
Raymond Hettinger <python@rcn.com>
parents: 27570
diff changeset
1700 }
941de791b17a SF bug #681003: itertools issues
Raymond Hettinger <python@rcn.com>
parents: 27570
diff changeset
1701
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1702 static PyObject *
28024
61fa6b55c1de User requested changes to the itertools module.
Raymond Hettinger <python@rcn.com>
parents: 27770
diff changeset
1703 chain_next(chainobject *lz)
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1704 {
61465
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diff changeset
1705 PyObject *item;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1706
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parents: 57521
diff changeset
1707 if (lz->source == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1708 return NULL; /* already stopped */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1709
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parents: 57521
diff changeset
1710 if (lz->active == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1711 PyObject *iterable = PyIter_Next(lz->source);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1712 if (iterable == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1713 Py_CLEAR(lz->source);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1714 return NULL; /* no more input sources */
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parents: 57521
diff changeset
1715 }
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diff changeset
1716 lz->active = PyObject_GetIter(iterable);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1717 Py_DECREF(iterable);
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parents: 57521
diff changeset
1718 if (lz->active == NULL) {
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parents: 57521
diff changeset
1719 Py_CLEAR(lz->source);
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parents: 57521
diff changeset
1720 return NULL; /* input not iterable */
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parents: 57521
diff changeset
1721 }
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diff changeset
1722 }
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diff changeset
1723 item = PyIter_Next(lz->active);
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parents: 57521
diff changeset
1724 if (item != NULL)
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parents: 57521
diff changeset
1725 return item;
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parents: 57521
diff changeset
1726 if (PyErr_Occurred()) {
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parents: 57521
diff changeset
1727 if (PyErr_ExceptionMatches(PyExc_StopIteration))
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parents: 57521
diff changeset
1728 PyErr_Clear();
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parents: 57521
diff changeset
1729 else
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diff changeset
1730 return NULL; /* input raised an exception */
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parents: 57521
diff changeset
1731 }
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diff changeset
1732 Py_CLEAR(lz->active);
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diff changeset
1733 return chain_next(lz); /* recurse and use next active */
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1734 }
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1735
28024
61fa6b55c1de User requested changes to the itertools module.
Raymond Hettinger <python@rcn.com>
parents: 27770
diff changeset
1736 PyDoc_STRVAR(chain_doc,
61fa6b55c1de User requested changes to the itertools module.
Raymond Hettinger <python@rcn.com>
parents: 27770
diff changeset
1737 "chain(*iterables) --> chain object\n\
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1738 \n\
28024
61fa6b55c1de User requested changes to the itertools module.
Raymond Hettinger <python@rcn.com>
parents: 27770
diff changeset
1739 Return a chain object whose .next() method returns elements from the\n\
61fa6b55c1de User requested changes to the itertools module.
Raymond Hettinger <python@rcn.com>
parents: 27770
diff changeset
1740 first iterable until it is exhausted, then elements from the next\n\
61fa6b55c1de User requested changes to the itertools module.
Raymond Hettinger <python@rcn.com>
parents: 27770
diff changeset
1741 iterable, until all of the iterables are exhausted.");
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1742
45563
7da36b49c9e5 Add alternate constructor for itertools.chain().
Raymond Hettinger <python@rcn.com>
parents: 45562
diff changeset
1743 PyDoc_STRVAR(chain_from_iterable_doc,
7da36b49c9e5 Add alternate constructor for itertools.chain().
Raymond Hettinger <python@rcn.com>
parents: 45562
diff changeset
1744 "chain.from_iterable(iterable) --> chain object\n\
7da36b49c9e5 Add alternate constructor for itertools.chain().
Raymond Hettinger <python@rcn.com>
parents: 45562
diff changeset
1745 \n\
7da36b49c9e5 Add alternate constructor for itertools.chain().
Raymond Hettinger <python@rcn.com>
parents: 45562
diff changeset
1746 Alternate chain() contructor taking a single iterable argument\n\
7da36b49c9e5 Add alternate constructor for itertools.chain().
Raymond Hettinger <python@rcn.com>
parents: 45562
diff changeset
1747 that evaluates lazily.");
7da36b49c9e5 Add alternate constructor for itertools.chain().
Raymond Hettinger <python@rcn.com>
parents: 45562
diff changeset
1748
7da36b49c9e5 Add alternate constructor for itertools.chain().
Raymond Hettinger <python@rcn.com>
parents: 45562
diff changeset
1749 static PyMethodDef chain_methods[] = {
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1750 {"from_iterable", (PyCFunction) chain_new_from_iterable, METH_O | METH_CLASS,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1751 chain_from_iterable_doc},
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1752 {NULL, NULL} /* sentinel */
45563
7da36b49c9e5 Add alternate constructor for itertools.chain().
Raymond Hettinger <python@rcn.com>
parents: 45562
diff changeset
1753 };
7da36b49c9e5 Add alternate constructor for itertools.chain().
Raymond Hettinger <python@rcn.com>
parents: 45562
diff changeset
1754
29850
45dc33433323 SF patch #770521: make itertools type declarations static
Raymond Hettinger <python@rcn.com>
parents: 29535
diff changeset
1755 static PyTypeObject chain_type = {
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1756 PyVarObject_HEAD_INIT(NULL, 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1757 "itertools.chain", /* tp_name */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1758 sizeof(chainobject), /* tp_basicsize */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1759 0, /* tp_itemsize */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1760 /* methods */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1761 (destructor)chain_dealloc, /* tp_dealloc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1762 0, /* tp_print */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1763 0, /* tp_getattr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1764 0, /* tp_setattr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1765 0, /* tp_compare */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1766 0, /* tp_repr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1767 0, /* tp_as_number */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1768 0, /* tp_as_sequence */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1769 0, /* tp_as_mapping */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1770 0, /* tp_hash */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1771 0, /* tp_call */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1772 0, /* tp_str */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1773 PyObject_GenericGetAttr, /* tp_getattro */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1774 0, /* tp_setattro */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1775 0, /* tp_as_buffer */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1776 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1777 Py_TPFLAGS_BASETYPE, /* tp_flags */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1778 chain_doc, /* tp_doc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1779 (traverseproc)chain_traverse, /* tp_traverse */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1780 0, /* tp_clear */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1781 0, /* tp_richcompare */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1782 0, /* tp_weaklistoffset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1783 PyObject_SelfIter, /* tp_iter */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1784 (iternextfunc)chain_next, /* tp_iternext */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1785 chain_methods, /* tp_methods */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1786 0, /* tp_members */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1787 0, /* tp_getset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1788 0, /* tp_base */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1789 0, /* tp_dict */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1790 0, /* tp_descr_get */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1791 0, /* tp_descr_set */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1792 0, /* tp_dictoffset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1793 0, /* tp_init */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1794 0, /* tp_alloc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1795 chain_new, /* tp_new */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1796 PyObject_GC_Del, /* tp_free */
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1797 };
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1798
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
1799
45425
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1800 /* product object ************************************************************/
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1801
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1802 typedef struct {
61465
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parents: 57521
diff changeset
1803 PyObject_HEAD
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1804 PyObject *pools; /* tuple of pool tuples */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1805 Py_ssize_t *indices; /* one index per pool */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1806 PyObject *result; /* most recently returned result tuple */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1807 int stopped; /* set to 1 when the product iterator is exhausted */
45425
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1808 } productobject;
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1809
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1810 static PyTypeObject product_type;
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1811
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1812 static PyObject *
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1813 product_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1814 {
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1815 productobject *lz;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1816 Py_ssize_t nargs, npools, repeat=1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1817 PyObject *pools = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1818 Py_ssize_t *indices = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1819 Py_ssize_t i;
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parents: 57521
diff changeset
1820
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parents: 57521
diff changeset
1821 if (kwds != NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1822 char *kwlist[] = {"repeat", 0};
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1823 PyObject *tmpargs = PyTuple_New(0);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1824 if (tmpargs == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1825 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1826 if (!PyArg_ParseTupleAndKeywords(tmpargs, kwds, "|n:product", kwlist, &repeat)) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1827 Py_DECREF(tmpargs);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1828 return NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1829 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1830 Py_DECREF(tmpargs);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1831 if (repeat < 0) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1832 PyErr_SetString(PyExc_ValueError,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 57521
diff changeset
1833 "repeat argument cannot be negative");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1834 return NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1835 }
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parents: 57521
diff changeset
1836 }
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parents: 57521
diff changeset
1837
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parents: 57521
diff changeset
1838 assert(PyTuple_Check(args));
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parents: 57521
diff changeset
1839 nargs = (repeat == 0) ? 0 : PyTuple_GET_SIZE(args);
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parents: 57521
diff changeset
1840 npools = nargs * repeat;
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parents: 57521
diff changeset
1841
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parents: 57521
diff changeset
1842 indices = PyMem_Malloc(npools * sizeof(Py_ssize_t));
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parents: 57521
diff changeset
1843 if (indices == NULL) {
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parents: 57521
diff changeset
1844 PyErr_NoMemory();
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parents: 57521
diff changeset
1845 goto error;
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parents: 57521
diff changeset
1846 }
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parents: 57521
diff changeset
1847
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diff changeset
1848 pools = PyTuple_New(npools);
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parents: 57521
diff changeset
1849 if (pools == NULL)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1850 goto error;
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parents: 57521
diff changeset
1851
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parents: 57521
diff changeset
1852 for (i=0; i < nargs ; ++i) {
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parents: 57521
diff changeset
1853 PyObject *item = PyTuple_GET_ITEM(args, i);
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parents: 57521
diff changeset
1854 PyObject *pool = PySequence_Tuple(item);
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parents: 57521
diff changeset
1855 if (pool == NULL)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1856 goto error;
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parents: 57521
diff changeset
1857 PyTuple_SET_ITEM(pools, i, pool);
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parents: 57521
diff changeset
1858 indices[i] = 0;
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parents: 57521
diff changeset
1859 }
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parents: 57521
diff changeset
1860 for ( ; i < npools; ++i) {
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parents: 57521
diff changeset
1861 PyObject *pool = PyTuple_GET_ITEM(pools, i - nargs);
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diff changeset
1862 Py_INCREF(pool);
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diff changeset
1863 PyTuple_SET_ITEM(pools, i, pool);
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parents: 57521
diff changeset
1864 indices[i] = 0;
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parents: 57521
diff changeset
1865 }
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parents: 57521
diff changeset
1866
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parents: 57521
diff changeset
1867 /* create productobject structure */
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parents: 57521
diff changeset
1868 lz = (productobject *)type->tp_alloc(type, 0);
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parents: 57521
diff changeset
1869 if (lz == NULL)
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diff changeset
1870 goto error;
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parents: 57521
diff changeset
1871
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parents: 57521
diff changeset
1872 lz->pools = pools;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1873 lz->indices = indices;
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parents: 57521
diff changeset
1874 lz->result = NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
1875 lz->stopped = 0;
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parents: 57521
diff changeset
1876
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parents: 57521
diff changeset
1877 return (PyObject *)lz;
45425
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1878
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1879 error:
61465
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diff changeset
1880 if (indices != NULL)
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parents: 57521
diff changeset
1881 PyMem_Free(indices);
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parents: 57521
diff changeset
1882 Py_XDECREF(pools);
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diff changeset
1883 return NULL;
45425
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Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1884 }
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1885
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1886 static void
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1887 product_dealloc(productobject *lz)
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1888 {
61465
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diff changeset
1889 PyObject_GC_UnTrack(lz);
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
1890 Py_XDECREF(lz->pools);
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diff changeset
1891 Py_XDECREF(lz->result);
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
1892 if (lz->indices != NULL)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
1893 PyMem_Free(lz->indices);
61465
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diff changeset
1894 Py_TYPE(lz)->tp_free(lz);
45425
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1895 }
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1896
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1897 static int
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1898 product_traverse(productobject *lz, visitproc visit, void *arg)
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
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diff changeset
1899 {
61465
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1900 Py_VISIT(lz->pools);
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diff changeset
1901 Py_VISIT(lz->result);
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diff changeset
1902 return 0;
45425
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Raymond Hettinger <python@rcn.com>
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diff changeset
1903 }
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
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diff changeset
1904
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1905 static PyObject *
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1906 product_next(productobject *lz)
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1907 {
61465
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diff changeset
1908 PyObject *pool;
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diff changeset
1909 PyObject *elem;
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diff changeset
1910 PyObject *oldelem;
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1911 PyObject *pools = lz->pools;
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diff changeset
1912 PyObject *result = lz->result;
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diff changeset
1913 Py_ssize_t npools = PyTuple_GET_SIZE(pools);
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1914 Py_ssize_t i;
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1915
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1916 if (lz->stopped)
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1917 return NULL;
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1918
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1919 if (result == NULL) {
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1920 /* On the first pass, return an initial tuple filled with the
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diff changeset
1921 first element from each pool. */
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1922 result = PyTuple_New(npools);
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1923 if (result == NULL)
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1924 goto empty;
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1925 lz->result = result;
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1926 for (i=0; i < npools; i++) {
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1927 pool = PyTuple_GET_ITEM(pools, i);
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1928 if (PyTuple_GET_SIZE(pool) == 0)
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1929 goto empty;
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1930 elem = PyTuple_GET_ITEM(pool, 0);
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1931 Py_INCREF(elem);
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1932 PyTuple_SET_ITEM(result, i, elem);
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1933 }
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1934 } else {
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1935 Py_ssize_t *indices = lz->indices;
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diff changeset
1936
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1937 /* Copy the previous result tuple or re-use it if available */
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1938 if (Py_REFCNT(result) > 1) {
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diff changeset
1939 PyObject *old_result = result;
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1940 result = PyTuple_New(npools);
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1941 if (result == NULL)
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1942 goto empty;
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1943 lz->result = result;
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1944 for (i=0; i < npools; i++) {
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1945 elem = PyTuple_GET_ITEM(old_result, i);
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1946 Py_INCREF(elem);
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1947 PyTuple_SET_ITEM(result, i, elem);
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1948 }
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1949 Py_DECREF(old_result);
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1950 }
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1951 /* Now, we've got the only copy so we can update it in-place */
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diff changeset
1952 assert (npools==0 || Py_REFCNT(result) == 1);
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diff changeset
1953
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1954 /* Update the pool indices right-to-left. Only advance to the
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diff changeset
1955 next pool when the previous one rolls-over */
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diff changeset
1956 for (i=npools-1 ; i >= 0 ; i--) {
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1957 pool = PyTuple_GET_ITEM(pools, i);
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1958 indices[i]++;
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1959 if (indices[i] == PyTuple_GET_SIZE(pool)) {
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diff changeset
1960 /* Roll-over and advance to next pool */
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1961 indices[i] = 0;
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1962 elem = PyTuple_GET_ITEM(pool, 0);
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1963 Py_INCREF(elem);
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1964 oldelem = PyTuple_GET_ITEM(result, i);
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1965 PyTuple_SET_ITEM(result, i, elem);
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diff changeset
1966 Py_DECREF(oldelem);
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diff changeset
1967 } else {
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1968 /* No rollover. Just increment and stop here. */
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diff changeset
1969 elem = PyTuple_GET_ITEM(pool, indices[i]);
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diff changeset
1970 Py_INCREF(elem);
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diff changeset
1971 oldelem = PyTuple_GET_ITEM(result, i);
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diff changeset
1972 PyTuple_SET_ITEM(result, i, elem);
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diff changeset
1973 Py_DECREF(oldelem);
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diff changeset
1974 break;
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1975 }
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diff changeset
1976 }
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diff changeset
1977
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diff changeset
1978 /* If i is negative, then the indices have all rolled-over
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diff changeset
1979 and we're done. */
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diff changeset
1980 if (i < 0)
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diff changeset
1981 goto empty;
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diff changeset
1982 }
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diff changeset
1983
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diff changeset
1984 Py_INCREF(result);
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diff changeset
1985 return result;
45425
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diff changeset
1986
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
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diff changeset
1987 empty:
61465
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diff changeset
1988 lz->stopped = 1;
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diff changeset
1989 return NULL;
45425
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diff changeset
1990 }
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
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diff changeset
1991
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
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parents: 44717
diff changeset
1992 PyDoc_STRVAR(product_doc,
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1993 "product(*iterables) --> product object\n\
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1994 \n\
45438
11a73fbbf86f Improve the implementation of itertools.product()
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parents: 45425
diff changeset
1995 Cartesian product of input iterables. Equivalent to nested for-loops.\n\n\
45425
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1996 For example, product(A, B) returns the same as: ((x,y) for x in A for y in B).\n\
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1997 The leftmost iterators are in the outermost for-loop, so the output tuples\n\
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1998 cycle in a manner similar to an odometer (with the rightmost element changing\n\
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
1999 on every iteration).\n\n\
51486
154e7c474aad Issue 5171: itertools.product docstring missing 'repeat' argument
Raymond Hettinger <python@rcn.com>
parents: 51164
diff changeset
2000 To compute the product of an iterable with itself, specify the number\n\
154e7c474aad Issue 5171: itertools.product docstring missing 'repeat' argument
Raymond Hettinger <python@rcn.com>
parents: 51164
diff changeset
2001 of repetitions with the optional repeat keyword argument. For example,\n\
154e7c474aad Issue 5171: itertools.product docstring missing 'repeat' argument
Raymond Hettinger <python@rcn.com>
parents: 51164
diff changeset
2002 product(A, repeat=4) means the same as product(A, A, A, A).\n\n\
45425
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
2003 product('ab', range(3)) --> ('a',0) ('a',1) ('a',2) ('b',0) ('b',1) ('b',2)\n\
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
2004 product((0,1), (0,1), (0,1)) --> (0,0,0) (0,0,1) (0,1,0) (0,1,1) (1,0,0) ...");
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
2005
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
2006 static PyTypeObject product_type = {
61465
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parents: 57521
diff changeset
2007 PyVarObject_HEAD_INIT(NULL, 0)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2008 "itertools.product", /* tp_name */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2009 sizeof(productobject), /* tp_basicsize */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2010 0, /* tp_itemsize */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2011 /* methods */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2012 (destructor)product_dealloc, /* tp_dealloc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2013 0, /* tp_print */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2014 0, /* tp_getattr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2015 0, /* tp_setattr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2016 0, /* tp_compare */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2017 0, /* tp_repr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2018 0, /* tp_as_number */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2019 0, /* tp_as_sequence */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2020 0, /* tp_as_mapping */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2021 0, /* tp_hash */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2022 0, /* tp_call */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2023 0, /* tp_str */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2024 PyObject_GenericGetAttr, /* tp_getattro */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2025 0, /* tp_setattro */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2026 0, /* tp_as_buffer */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2027 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2028 Py_TPFLAGS_BASETYPE, /* tp_flags */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2029 product_doc, /* tp_doc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2030 (traverseproc)product_traverse, /* tp_traverse */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2031 0, /* tp_clear */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2032 0, /* tp_richcompare */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2033 0, /* tp_weaklistoffset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2034 PyObject_SelfIter, /* tp_iter */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2035 (iternextfunc)product_next, /* tp_iternext */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2036 0, /* tp_methods */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2037 0, /* tp_members */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2038 0, /* tp_getset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2039 0, /* tp_base */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2040 0, /* tp_dict */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2041 0, /* tp_descr_get */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2042 0, /* tp_descr_set */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2043 0, /* tp_dictoffset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2044 0, /* tp_init */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2045 0, /* tp_alloc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2046 product_new, /* tp_new */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2047 PyObject_GC_Del, /* tp_free */
45425
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
2048 };
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
2049
3cc57fd87d0e First draft for itertools.product(). Docs and other updates forthcoming.
Raymond Hettinger <python@rcn.com>
parents: 44717
diff changeset
2050
45539
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2051 /* combinations object ************************************************************/
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2052
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2053 typedef struct {
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2054 PyObject_HEAD
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2055 PyObject *pool; /* input converted to a tuple */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2056 Py_ssize_t *indices; /* one index per result element */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2057 PyObject *result; /* most recently returned result tuple */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2058 Py_ssize_t r; /* size of result tuple */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2059 int stopped; /* set to 1 when the combinations iterator is exhausted */
45539
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2060 } combinationsobject;
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2061
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2062 static PyTypeObject combinations_type;
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2063
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2064 static PyObject *
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2065 combinations_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2066 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2067 combinationsobject *co;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2068 Py_ssize_t n;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2069 Py_ssize_t r;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2070 PyObject *pool = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2071 PyObject *iterable = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2072 Py_ssize_t *indices = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2073 Py_ssize_t i;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2074 static char *kwargs[] = {"iterable", "r", NULL};
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2075
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2076 if (!PyArg_ParseTupleAndKeywords(args, kwds, "On:combinations", kwargs,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2077 &iterable, &r))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2078 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2079
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2080 pool = PySequence_Tuple(iterable);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2081 if (pool == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2082 goto error;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2083 n = PyTuple_GET_SIZE(pool);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2084 if (r < 0) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2085 PyErr_SetString(PyExc_ValueError, "r must be non-negative");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2086 goto error;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2087 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2088
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2089 indices = PyMem_Malloc(r * sizeof(Py_ssize_t));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2090 if (indices == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2091 PyErr_NoMemory();
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2092 goto error;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2093 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2094
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2095 for (i=0 ; i<r ; i++)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2096 indices[i] = i;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2097
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2098 /* create combinationsobject structure */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2099 co = (combinationsobject *)type->tp_alloc(type, 0);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2100 if (co == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2101 goto error;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2102
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2103 co->pool = pool;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2104 co->indices = indices;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2105 co->result = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2106 co->r = r;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2107 co->stopped = r > n ? 1 : 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2108
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2109 return (PyObject *)co;
45539
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2110
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2111 error:
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2112 if (indices != NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2113 PyMem_Free(indices);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2114 Py_XDECREF(pool);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2115 return NULL;
45539
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2116 }
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2117
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2118 static void
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2119 combinations_dealloc(combinationsobject *co)
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2120 {
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2121 PyObject_GC_UnTrack(co);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2122 Py_XDECREF(co->pool);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2123 Py_XDECREF(co->result);
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2124 if (co->indices != NULL)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2125 PyMem_Free(co->indices);
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2126 Py_TYPE(co)->tp_free(co);
45539
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2127 }
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2128
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2129 static int
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2130 combinations_traverse(combinationsobject *co, visitproc visit, void *arg)
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2131 {
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2132 Py_VISIT(co->pool);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2133 Py_VISIT(co->result);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2134 return 0;
45539
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2135 }
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2136
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2137 static PyObject *
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2138 combinations_next(combinationsobject *co)
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2139 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2140 PyObject *elem;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2141 PyObject *oldelem;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2142 PyObject *pool = co->pool;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2143 Py_ssize_t *indices = co->indices;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2144 PyObject *result = co->result;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2145 Py_ssize_t n = PyTuple_GET_SIZE(pool);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2146 Py_ssize_t r = co->r;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2147 Py_ssize_t i, j, index;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2148
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2149 if (co->stopped)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2150 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2151
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2152 if (result == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2153 /* On the first pass, initialize result tuple using the indices */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2154 result = PyTuple_New(r);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2155 if (result == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2156 goto empty;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2157 co->result = result;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2158 for (i=0; i<r ; i++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2159 index = indices[i];
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2160 elem = PyTuple_GET_ITEM(pool, index);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2161 Py_INCREF(elem);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2162 PyTuple_SET_ITEM(result, i, elem);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2163 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2164 } else {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2165 /* Copy the previous result tuple or re-use it if available */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2166 if (Py_REFCNT(result) > 1) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2167 PyObject *old_result = result;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2168 result = PyTuple_New(r);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2169 if (result == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2170 goto empty;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2171 co->result = result;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2172 for (i=0; i<r ; i++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2173 elem = PyTuple_GET_ITEM(old_result, i);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2174 Py_INCREF(elem);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2175 PyTuple_SET_ITEM(result, i, elem);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2176 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2177 Py_DECREF(old_result);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2178 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2179 /* Now, we've got the only copy so we can update it in-place
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2180 * CPython's empty tuple is a singleton and cached in
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2181 * PyTuple's freelist.
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2182 */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2183 assert(r == 0 || Py_REFCNT(result) == 1);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2184
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2185 /* Scan indices right-to-left until finding one that is not
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2186 at its maximum (i + n - r). */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2187 for (i=r-1 ; i >= 0 && indices[i] == i+n-r ; i--)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2188 ;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2189
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2190 /* If i is negative, then the indices are all at
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2191 their maximum value and we're done. */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2192 if (i < 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2193 goto empty;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2194
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2195 /* Increment the current index which we know is not at its
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2196 maximum. Then move back to the right setting each index
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2197 to its lowest possible value (one higher than the index
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2198 to its left -- this maintains the sort order invariant). */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2199 indices[i]++;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2200 for (j=i+1 ; j<r ; j++)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2201 indices[j] = indices[j-1] + 1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2202
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2203 /* Update the result tuple for the new indices
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2204 starting with i, the leftmost index that changed */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2205 for ( ; i<r ; i++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2206 index = indices[i];
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2207 elem = PyTuple_GET_ITEM(pool, index);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2208 Py_INCREF(elem);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2209 oldelem = PyTuple_GET_ITEM(result, i);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2210 PyTuple_SET_ITEM(result, i, elem);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2211 Py_DECREF(oldelem);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2212 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2213 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2214
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2215 Py_INCREF(result);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2216 return result;
45539
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2217
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2218 empty:
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2219 co->stopped = 1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2220 return NULL;
45539
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2221 }
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2222
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2223 PyDoc_STRVAR(combinations_doc,
57345
f73d137cfbd0 Fix docstrings for itertools combinatoric functions.
Raymond Hettinger <python@rcn.com>
parents: 57036
diff changeset
2224 "combinations(iterable, r) --> combinations object\n\
45539
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2225 \n\
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2226 Return successive r-length combinations of elements in the iterable.\n\n\
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2227 combinations(range(4), 3) --> (0,1,2), (0,1,3), (0,2,3), (1,2,3)");
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2228
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2229 static PyTypeObject combinations_type = {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2230 PyVarObject_HEAD_INIT(NULL, 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2231 "itertools.combinations", /* tp_name */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2232 sizeof(combinationsobject), /* tp_basicsize */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2233 0, /* tp_itemsize */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2234 /* methods */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2235 (destructor)combinations_dealloc, /* tp_dealloc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2236 0, /* tp_print */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2237 0, /* tp_getattr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2238 0, /* tp_setattr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2239 0, /* tp_compare */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2240 0, /* tp_repr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2241 0, /* tp_as_number */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2242 0, /* tp_as_sequence */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2243 0, /* tp_as_mapping */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2244 0, /* tp_hash */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2245 0, /* tp_call */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2246 0, /* tp_str */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2247 PyObject_GenericGetAttr, /* tp_getattro */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2248 0, /* tp_setattro */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2249 0, /* tp_as_buffer */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2250 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2251 Py_TPFLAGS_BASETYPE, /* tp_flags */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2252 combinations_doc, /* tp_doc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2253 (traverseproc)combinations_traverse, /* tp_traverse */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2254 0, /* tp_clear */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2255 0, /* tp_richcompare */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2256 0, /* tp_weaklistoffset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2257 PyObject_SelfIter, /* tp_iter */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2258 (iternextfunc)combinations_next, /* tp_iternext */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2259 0, /* tp_methods */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2260 0, /* tp_members */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2261 0, /* tp_getset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2262 0, /* tp_base */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2263 0, /* tp_dict */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2264 0, /* tp_descr_get */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2265 0, /* tp_descr_set */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2266 0, /* tp_dictoffset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2267 0, /* tp_init */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2268 0, /* tp_alloc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2269 combinations_new, /* tp_new */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2270 PyObject_GC_Del, /* tp_free */
45539
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2271 };
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2272
ca45eb71f2d2 Add itertools.combinations().
Raymond Hettinger <python@rcn.com>
parents: 45526
diff changeset
2273
51097
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2274 /* combinations with replacement object *******************************************/
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2275
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2276 /* Equivalent to:
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2277
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2278 def combinations_with_replacement(iterable, r):
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2279 "combinations_with_replacement('ABC', 2) --> AA AB AC BB BC CC"
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2280 # number items returned: (n+r-1)! / r! / (n-1)!
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2281 pool = tuple(iterable)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2282 n = len(pool)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2283 indices = [0] * r
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2284 yield tuple(pool[i] for i in indices)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2285 while 1:
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2286 for i in reversed(range(r)):
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2287 if indices[i] != n - 1:
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2288 break
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2289 else:
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2290 return
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2291 indices[i:] = [indices[i] + 1] * (r - i)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2292 yield tuple(pool[i] for i in indices)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2293
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2294 def combinations_with_replacement2(iterable, r):
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2295 'Alternate version that filters from product()'
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2296 pool = tuple(iterable)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2297 n = len(pool)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2298 for indices in product(range(n), repeat=r):
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2299 if sorted(indices) == list(indices):
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2300 yield tuple(pool[i] for i in indices)
51097
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2301 */
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2302 typedef struct {
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2303 PyObject_HEAD
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2304 PyObject *pool; /* input converted to a tuple */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2305 Py_ssize_t *indices; /* one index per result element */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2306 PyObject *result; /* most recently returned result tuple */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2307 Py_ssize_t r; /* size of result tuple */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2308 int stopped; /* set to 1 when the cwr iterator is exhausted */
51097
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2309 } cwrobject;
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2310
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2311 static PyTypeObject cwr_type;
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2312
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2313 static PyObject *
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2314 cwr_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2315 {
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2316 cwrobject *co;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2317 Py_ssize_t n;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2318 Py_ssize_t r;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2319 PyObject *pool = NULL;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2320 PyObject *iterable = NULL;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2321 Py_ssize_t *indices = NULL;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2322 Py_ssize_t i;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2323 static char *kwargs[] = {"iterable", "r", NULL};
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2324
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2325 if (!PyArg_ParseTupleAndKeywords(args, kwds, "On:combinations_with_replacement", kwargs,
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2326 &iterable, &r))
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2327 return NULL;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2328
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2329 pool = PySequence_Tuple(iterable);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2330 if (pool == NULL)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2331 goto error;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2332 n = PyTuple_GET_SIZE(pool);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2333 if (r < 0) {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2334 PyErr_SetString(PyExc_ValueError, "r must be non-negative");
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2335 goto error;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2336 }
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2337
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2338 indices = PyMem_Malloc(r * sizeof(Py_ssize_t));
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2339 if (indices == NULL) {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2340 PyErr_NoMemory();
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2341 goto error;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2342 }
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2343
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2344 for (i=0 ; i<r ; i++)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2345 indices[i] = 0;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2346
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2347 /* create cwrobject structure */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2348 co = (cwrobject *)type->tp_alloc(type, 0);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2349 if (co == NULL)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2350 goto error;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2351
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2352 co->pool = pool;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2353 co->indices = indices;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2354 co->result = NULL;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2355 co->r = r;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2356 co->stopped = !n && r;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2357
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2358 return (PyObject *)co;
51097
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2359
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2360 error:
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2361 if (indices != NULL)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2362 PyMem_Free(indices);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2363 Py_XDECREF(pool);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2364 return NULL;
51097
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2365 }
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2366
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2367 static void
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2368 cwr_dealloc(cwrobject *co)
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2369 {
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2370 PyObject_GC_UnTrack(co);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2371 Py_XDECREF(co->pool);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2372 Py_XDECREF(co->result);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2373 if (co->indices != NULL)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2374 PyMem_Free(co->indices);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2375 Py_TYPE(co)->tp_free(co);
51097
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2376 }
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2377
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2378 static int
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2379 cwr_traverse(cwrobject *co, visitproc visit, void *arg)
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2380 {
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2381 Py_VISIT(co->pool);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2382 Py_VISIT(co->result);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2383 return 0;
51097
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2384 }
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2385
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2386 static PyObject *
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2387 cwr_next(cwrobject *co)
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2388 {
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2389 PyObject *elem;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2390 PyObject *oldelem;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2391 PyObject *pool = co->pool;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2392 Py_ssize_t *indices = co->indices;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2393 PyObject *result = co->result;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2394 Py_ssize_t n = PyTuple_GET_SIZE(pool);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2395 Py_ssize_t r = co->r;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2396 Py_ssize_t i, j, index;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2397
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2398 if (co->stopped)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2399 return NULL;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2400
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2401 if (result == NULL) {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2402 /* On the first pass, initialize result tuple using the indices */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2403 result = PyTuple_New(r);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2404 if (result == NULL)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2405 goto empty;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2406 co->result = result;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2407 for (i=0; i<r ; i++) {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2408 index = indices[i];
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2409 elem = PyTuple_GET_ITEM(pool, index);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2410 Py_INCREF(elem);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2411 PyTuple_SET_ITEM(result, i, elem);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2412 }
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2413 } else {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2414 /* Copy the previous result tuple or re-use it if available */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2415 if (Py_REFCNT(result) > 1) {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2416 PyObject *old_result = result;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2417 result = PyTuple_New(r);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2418 if (result == NULL)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2419 goto empty;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2420 co->result = result;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2421 for (i=0; i<r ; i++) {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2422 elem = PyTuple_GET_ITEM(old_result, i);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2423 Py_INCREF(elem);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2424 PyTuple_SET_ITEM(result, i, elem);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2425 }
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2426 Py_DECREF(old_result);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2427 }
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2428 /* Now, we've got the only copy so we can update it in-place CPython's
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2429 empty tuple is a singleton and cached in PyTuple's freelist. */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2430 assert(r == 0 || Py_REFCNT(result) == 1);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2431
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2432 /* Scan indices right-to-left until finding one that is not
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2433 * at its maximum (n-1). */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2434 for (i=r-1 ; i >= 0 && indices[i] == n-1; i--)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2435 ;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2436
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2437 /* If i is negative, then the indices are all at
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2438 their maximum value and we're done. */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2439 if (i < 0)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2440 goto empty;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2441
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2442 /* Increment the current index which we know is not at its
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2443 maximum. Then set all to the right to the same value. */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2444 indices[i]++;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2445 for (j=i+1 ; j<r ; j++)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2446 indices[j] = indices[j-1];
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2447
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2448 /* Update the result tuple for the new indices
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2449 starting with i, the leftmost index that changed */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2450 for ( ; i<r ; i++) {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2451 index = indices[i];
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2452 elem = PyTuple_GET_ITEM(pool, index);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2453 Py_INCREF(elem);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2454 oldelem = PyTuple_GET_ITEM(result, i);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2455 PyTuple_SET_ITEM(result, i, elem);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2456 Py_DECREF(oldelem);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2457 }
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2458 }
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2459
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2460 Py_INCREF(result);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2461 return result;
51097
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2462
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2463 empty:
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2464 co->stopped = 1;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2465 return NULL;
51097
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2466 }
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2467
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2468 PyDoc_STRVAR(cwr_doc,
57343
f152667200ae Fix docstrings for itertools combinatoric functions.
Raymond Hettinger <python@rcn.com>
parents: 57040
diff changeset
2469 "combinations_with_replacement(iterable, r) --> combinations_with_replacement object\n\
51097
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2470 \n\
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2471 Return successive r-length combinations of elements in the iterable\n\
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2472 allowing individual elements to have successive repeats.\n\
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2473 combinations_with_replacement('ABC', 2) --> AA AB AC BB BC CC");
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2474
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2475 static PyTypeObject cwr_type = {
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2476 PyVarObject_HEAD_INIT(NULL, 0)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2477 "itertools.combinations_with_replacement", /* tp_name */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2478 sizeof(cwrobject), /* tp_basicsize */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2479 0, /* tp_itemsize */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2480 /* methods */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2481 (destructor)cwr_dealloc, /* tp_dealloc */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2482 0, /* tp_print */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2483 0, /* tp_getattr */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2484 0, /* tp_setattr */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2485 0, /* tp_compare */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2486 0, /* tp_repr */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2487 0, /* tp_as_number */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2488 0, /* tp_as_sequence */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2489 0, /* tp_as_mapping */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2490 0, /* tp_hash */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2491 0, /* tp_call */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2492 0, /* tp_str */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2493 PyObject_GenericGetAttr, /* tp_getattro */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2494 0, /* tp_setattro */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2495 0, /* tp_as_buffer */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2496 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2497 Py_TPFLAGS_BASETYPE, /* tp_flags */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2498 cwr_doc, /* tp_doc */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2499 (traverseproc)cwr_traverse, /* tp_traverse */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2500 0, /* tp_clear */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2501 0, /* tp_richcompare */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2502 0, /* tp_weaklistoffset */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2503 PyObject_SelfIter, /* tp_iter */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2504 (iternextfunc)cwr_next, /* tp_iternext */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2505 0, /* tp_methods */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2506 0, /* tp_members */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2507 0, /* tp_getset */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2508 0, /* tp_base */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2509 0, /* tp_dict */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2510 0, /* tp_descr_get */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2511 0, /* tp_descr_set */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2512 0, /* tp_dictoffset */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2513 0, /* tp_init */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2514 0, /* tp_alloc */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2515 cwr_new, /* tp_new */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2516 PyObject_GC_Del, /* tp_free */
51097
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2517 };
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2518
b7ce675febb9 Promote combinations_with_replacement() from a recipe to a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 51045
diff changeset
2519
45675
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2520 /* permutations object ************************************************************
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2521
45675
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2522 def permutations(iterable, r=None):
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2523 'permutations(range(3), 2) --> (0,1) (0,2) (1,0) (1,2) (2,0) (2,1)'
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2524 pool = tuple(iterable)
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2525 n = len(pool)
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2526 r = n if r is None else r
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2527 indices = range(n)
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2528 cycles = range(n-r+1, n+1)[::-1]
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2529 yield tuple(pool[i] for i in indices[:r])
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2530 while n:
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2531 for i in reversed(range(r)):
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2532 cycles[i] -= 1
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2533 if cycles[i] == 0:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2534 indices[i:] = indices[i+1:] + indices[i:i+1]
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2535 cycles[i] = n - i
45675
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2536 else:
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2537 j = cycles[i]
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2538 indices[i], indices[-j] = indices[-j], indices[i]
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2539 yield tuple(pool[i] for i in indices[:r])
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2540 break
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2541 else:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2542 return
45675
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2543 */
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2544
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2545 typedef struct {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2546 PyObject_HEAD
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2547 PyObject *pool; /* input converted to a tuple */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2548 Py_ssize_t *indices; /* one index per element in the pool */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2549 Py_ssize_t *cycles; /* one rollover counter per element in the result */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2550 PyObject *result; /* most recently returned result tuple */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2551 Py_ssize_t r; /* size of result tuple */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2552 int stopped; /* set to 1 when the permutations iterator is exhausted */
45675
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2553 } permutationsobject;
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2554
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2555 static PyTypeObject permutations_type;
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2556
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2557 static PyObject *
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2558 permutations_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2559 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2560 permutationsobject *po;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2561 Py_ssize_t n;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2562 Py_ssize_t r;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2563 PyObject *robj = Py_None;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2564 PyObject *pool = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2565 PyObject *iterable = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2566 Py_ssize_t *indices = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2567 Py_ssize_t *cycles = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2568 Py_ssize_t i;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2569 static char *kwargs[] = {"iterable", "r", NULL};
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2570
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2571 if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|O:permutations", kwargs,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2572 &iterable, &robj))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2573 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2574
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2575 pool = PySequence_Tuple(iterable);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2576 if (pool == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2577 goto error;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2578 n = PyTuple_GET_SIZE(pool);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2579
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2580 r = n;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2581 if (robj != Py_None) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2582 r = PyInt_AsSsize_t(robj);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2583 if (r == -1 && PyErr_Occurred())
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2584 goto error;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2585 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2586 if (r < 0) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2587 PyErr_SetString(PyExc_ValueError, "r must be non-negative");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2588 goto error;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2589 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2590
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2591 indices = PyMem_Malloc(n * sizeof(Py_ssize_t));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2592 cycles = PyMem_Malloc(r * sizeof(Py_ssize_t));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2593 if (indices == NULL || cycles == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2594 PyErr_NoMemory();
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2595 goto error;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2596 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2597
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2598 for (i=0 ; i<n ; i++)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2599 indices[i] = i;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2600 for (i=0 ; i<r ; i++)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2601 cycles[i] = n - i;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2602
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2603 /* create permutationsobject structure */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2604 po = (permutationsobject *)type->tp_alloc(type, 0);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2605 if (po == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2606 goto error;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2607
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2608 po->pool = pool;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2609 po->indices = indices;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2610 po->cycles = cycles;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2611 po->result = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2612 po->r = r;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2613 po->stopped = r > n ? 1 : 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2614
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2615 return (PyObject *)po;
45675
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2616
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2617 error:
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2618 if (indices != NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2619 PyMem_Free(indices);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2620 if (cycles != NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2621 PyMem_Free(cycles);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2622 Py_XDECREF(pool);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2623 return NULL;
45675
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2624 }
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2625
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2626 static void
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2627 permutations_dealloc(permutationsobject *po)
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2628 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2629 PyObject_GC_UnTrack(po);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2630 Py_XDECREF(po->pool);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2631 Py_XDECREF(po->result);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2632 PyMem_Free(po->indices);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2633 PyMem_Free(po->cycles);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2634 Py_TYPE(po)->tp_free(po);
45675
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2635 }
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2636
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2637 static int
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2638 permutations_traverse(permutationsobject *po, visitproc visit, void *arg)
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2639 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2640 Py_VISIT(po->pool);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2641 Py_VISIT(po->result);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2642 return 0;
45675
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2643 }
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2644
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2645 static PyObject *
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2646 permutations_next(permutationsobject *po)
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2647 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2648 PyObject *elem;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2649 PyObject *oldelem;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2650 PyObject *pool = po->pool;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2651 Py_ssize_t *indices = po->indices;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2652 Py_ssize_t *cycles = po->cycles;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2653 PyObject *result = po->result;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2654 Py_ssize_t n = PyTuple_GET_SIZE(pool);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2655 Py_ssize_t r = po->r;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2656 Py_ssize_t i, j, k, index;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2657
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2658 if (po->stopped)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2659 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2660
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2661 if (result == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2662 /* On the first pass, initialize result tuple using the indices */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2663 result = PyTuple_New(r);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2664 if (result == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2665 goto empty;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2666 po->result = result;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2667 for (i=0; i<r ; i++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2668 index = indices[i];
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2669 elem = PyTuple_GET_ITEM(pool, index);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2670 Py_INCREF(elem);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2671 PyTuple_SET_ITEM(result, i, elem);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2672 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2673 } else {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2674 if (n == 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2675 goto empty;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2676
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2677 /* Copy the previous result tuple or re-use it if available */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2678 if (Py_REFCNT(result) > 1) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2679 PyObject *old_result = result;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2680 result = PyTuple_New(r);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2681 if (result == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2682 goto empty;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2683 po->result = result;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2684 for (i=0; i<r ; i++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2685 elem = PyTuple_GET_ITEM(old_result, i);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2686 Py_INCREF(elem);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2687 PyTuple_SET_ITEM(result, i, elem);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2688 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2689 Py_DECREF(old_result);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2690 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2691 /* Now, we've got the only copy so we can update it in-place */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2692 assert(r == 0 || Py_REFCNT(result) == 1);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2693
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2694 /* Decrement rightmost cycle, moving leftward upon zero rollover */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2695 for (i=r-1 ; i>=0 ; i--) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2696 cycles[i] -= 1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2697 if (cycles[i] == 0) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2698 /* rotatation: indices[i:] = indices[i+1:] + indices[i:i+1] */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2699 index = indices[i];
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2700 for (j=i ; j<n-1 ; j++)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2701 indices[j] = indices[j+1];
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2702 indices[n-1] = index;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2703 cycles[i] = n - i;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2704 } else {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2705 j = cycles[i];
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2706 index = indices[i];
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2707 indices[i] = indices[n-j];
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2708 indices[n-j] = index;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2709
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2710 for (k=i; k<r ; k++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2711 /* start with i, the leftmost element that changed */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2712 /* yield tuple(pool[k] for k in indices[:r]) */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2713 index = indices[k];
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2714 elem = PyTuple_GET_ITEM(pool, index);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2715 Py_INCREF(elem);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2716 oldelem = PyTuple_GET_ITEM(result, k);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2717 PyTuple_SET_ITEM(result, k, elem);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2718 Py_DECREF(oldelem);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2719 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2720 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2721 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2722 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2723 /* If i is negative, then the cycles have all
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2724 rolled-over and we're done. */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2725 if (i < 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2726 goto empty;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2727 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2728 Py_INCREF(result);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2729 return result;
45675
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2730
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2731 empty:
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2732 po->stopped = 1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2733 return NULL;
45675
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2734 }
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2735
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2736 PyDoc_STRVAR(permutations_doc,
47544
f4989516b4d6 #2536: fix itertools.permutations and itertools.combinations docstrings.
Georg Brandl <georg@python.org>
parents: 47527
diff changeset
2737 "permutations(iterable[, r]) --> permutations object\n\
45675
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2738 \n\
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2739 Return successive r-length permutations of elements in the iterable.\n\n\
47544
f4989516b4d6 #2536: fix itertools.permutations and itertools.combinations docstrings.
Georg Brandl <georg@python.org>
parents: 47527
diff changeset
2740 permutations(range(3), 2) --> (0,1), (0,2), (1,0), (1,2), (2,0), (2,1)");
45675
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2741
c197e18449b4 C implementation of itertools.permutations().
Raymond Hettinger <python@rcn.com>
parents: 45658
diff changeset
2742 static PyTypeObject permutations_type = {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2743 PyVarObject_HEAD_INIT(NULL, 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2744 "itertools.permutations", /* tp_name */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2745 sizeof(permutationsobject), /* tp_basicsize */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2746 0, /* tp_itemsize */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2747 /* methods */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2748 (destructor)permutations_dealloc, /* tp_dealloc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2749 0, /* tp_print */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2750 0, /* tp_getattr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2751 0, /* tp_setattr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2752 0, /* tp_compare */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2753 0, /* tp_repr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2754 0, /* tp_as_number */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2755 0, /* tp_as_sequence */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2756 0, /* tp_as_mapping */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2757 0, /* tp_hash */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2758 0, /* tp_call */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2759 0, /* tp_str */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2760 PyObject_GenericGetAttr, /* tp_getattro */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2761 0, /* tp_setattro */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2762 0, /* tp_as_buffer */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2763 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2764 Py_TPFLAGS_BASETYPE, /* tp_flags */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2765 permutations_doc, /* tp_doc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2766 (traverseproc)permutations_traverse, /* tp_traverse */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2767 0, /* tp_clear */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2768 0, /* tp_richcompare */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2769 0, /* tp_weaklistoffset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2770 PyObject_SelfIter, /* tp_iter */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2771 (iternextfunc)permutations_next, /* tp_iternext */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2772 0, /* tp_methods */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2773 0, /* tp_members */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2774 0, /* tp_getset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2775 0, /* tp_base */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2776 0, /* tp_dict */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2777 0, /* tp_descr_get */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2778 0, /* tp_descr_set */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2779 0, /* tp_dictoffset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2780 0, /* tp_init */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2781 0, /* tp_alloc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2782 permutations_new, /* tp_new */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2783 PyObject_GC_Del, /* tp_free */
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
2784 };
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
2785
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
2786
51045
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2787 /* compress object ************************************************************/
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2788
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2789 /* Equivalent to:
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2790
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2791 def compress(data, selectors):
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2792 "compress('ABCDEF', [1,0,1,0,1,1]) --> A C E F"
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2793 return (d for d, s in izip(data, selectors) if s)
51045
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2794 */
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2795
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2796 typedef struct {
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2797 PyObject_HEAD
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2798 PyObject *data;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2799 PyObject *selectors;
51045
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2800 } compressobject;
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2801
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2802 static PyTypeObject compress_type;
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2803
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2804 static PyObject *
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2805 compress_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2806 {
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2807 PyObject *seq1, *seq2;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2808 PyObject *data=NULL, *selectors=NULL;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2809 compressobject *lz;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2810 static char *kwargs[] = {"data", "selectors", NULL};
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2811
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2812 if (!PyArg_ParseTupleAndKeywords(args, kwds, "OO:compress", kwargs, &seq1, &seq2))
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2813 return NULL;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2814
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2815 data = PyObject_GetIter(seq1);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2816 if (data == NULL)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2817 goto fail;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2818 selectors = PyObject_GetIter(seq2);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2819 if (selectors == NULL)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2820 goto fail;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2821
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2822 /* create compressobject structure */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2823 lz = (compressobject *)type->tp_alloc(type, 0);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2824 if (lz == NULL)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2825 goto fail;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2826 lz->data = data;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2827 lz->selectors = selectors;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2828 return (PyObject *)lz;
51045
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2829
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2830 fail:
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2831 Py_XDECREF(data);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2832 Py_XDECREF(selectors);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2833 return NULL;
51045
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2834 }
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2835
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2836 static void
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2837 compress_dealloc(compressobject *lz)
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2838 {
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2839 PyObject_GC_UnTrack(lz);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2840 Py_XDECREF(lz->data);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2841 Py_XDECREF(lz->selectors);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2842 Py_TYPE(lz)->tp_free(lz);
51045
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2843 }
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2844
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2845 static int
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2846 compress_traverse(compressobject *lz, visitproc visit, void *arg)
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2847 {
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2848 Py_VISIT(lz->data);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2849 Py_VISIT(lz->selectors);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2850 return 0;
51045
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2851 }
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2852
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2853 static PyObject *
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2854 compress_next(compressobject *lz)
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2855 {
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2856 PyObject *data = lz->data, *selectors = lz->selectors;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2857 PyObject *datum, *selector;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2858 PyObject *(*datanext)(PyObject *) = *Py_TYPE(data)->tp_iternext;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2859 PyObject *(*selectornext)(PyObject *) = *Py_TYPE(selectors)->tp_iternext;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2860 int ok;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2861
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2862 while (1) {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2863 /* Steps: get datum, get selector, evaluate selector.
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2864 Order is important (to match the pure python version
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2865 in terms of which input gets a chance to raise an
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2866 exception first).
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2867 */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2868
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2869 datum = datanext(data);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2870 if (datum == NULL)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2871 return NULL;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2872
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2873 selector = selectornext(selectors);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2874 if (selector == NULL) {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2875 Py_DECREF(datum);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2876 return NULL;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2877 }
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2878
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2879 ok = PyObject_IsTrue(selector);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2880 Py_DECREF(selector);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2881 if (ok == 1)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2882 return datum;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2883 Py_DECREF(datum);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2884 if (ok == -1)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2885 return NULL;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2886 }
51045
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2887 }
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2888
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2889 PyDoc_STRVAR(compress_doc,
51715
748dfe9bb857 Add keyword arg support to itertools.compress().
Raymond Hettinger <python@rcn.com>
parents: 51665
diff changeset
2890 "compress(data, selectors) --> iterator over selected data\n\
51045
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2891 \n\
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2892 Return data elements corresponding to true selector elements.\n\
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2893 Forms a shorter iterator from selected data elements using the\n\
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2894 selectors to choose the data elements.");
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2895
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2896 static PyTypeObject compress_type = {
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2897 PyVarObject_HEAD_INIT(NULL, 0)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2898 "itertools.compress", /* tp_name */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2899 sizeof(compressobject), /* tp_basicsize */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2900 0, /* tp_itemsize */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2901 /* methods */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2902 (destructor)compress_dealloc, /* tp_dealloc */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2903 0, /* tp_print */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2904 0, /* tp_getattr */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2905 0, /* tp_setattr */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2906 0, /* tp_compare */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2907 0, /* tp_repr */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2908 0, /* tp_as_number */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2909 0, /* tp_as_sequence */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2910 0, /* tp_as_mapping */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2911 0, /* tp_hash */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2912 0, /* tp_call */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2913 0, /* tp_str */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2914 PyObject_GenericGetAttr, /* tp_getattro */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2915 0, /* tp_setattro */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2916 0, /* tp_as_buffer */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2917 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2918 Py_TPFLAGS_BASETYPE, /* tp_flags */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2919 compress_doc, /* tp_doc */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2920 (traverseproc)compress_traverse, /* tp_traverse */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2921 0, /* tp_clear */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2922 0, /* tp_richcompare */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2923 0, /* tp_weaklistoffset */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2924 PyObject_SelfIter, /* tp_iter */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2925 (iternextfunc)compress_next, /* tp_iternext */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2926 0, /* tp_methods */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2927 0, /* tp_members */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2928 0, /* tp_getset */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2929 0, /* tp_base */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2930 0, /* tp_dict */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2931 0, /* tp_descr_get */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2932 0, /* tp_descr_set */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2933 0, /* tp_dictoffset */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2934 0, /* tp_init */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2935 0, /* tp_alloc */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2936 compress_new, /* tp_new */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
2937 PyObject_GC_Del, /* tp_free */
51045
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2938 };
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2939
14ace205447b Promote compress() from a recipe to being a regular itertool.
Raymond Hettinger <python@rcn.com>
parents: 50754
diff changeset
2940
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
2941 /* ifilter object ************************************************************/
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
2942
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
2943 typedef struct {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2944 PyObject_HEAD
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2945 PyObject *func;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2946 PyObject *it;
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
2947 } ifilterobject;
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
2948
29850
45dc33433323 SF patch #770521: make itertools type declarations static
Raymond Hettinger <python@rcn.com>
parents: 29535
diff changeset
2949 static PyTypeObject ifilter_type;
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
2950
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
2951 static PyObject *
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
2952 ifilter_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
2953 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2954 PyObject *func, *seq;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2955 PyObject *it;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2956 ifilterobject *lz;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2957
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2958 if (type == &ifilter_type && !_PyArg_NoKeywords("ifilter()", kwds))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2959 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2960
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2961 if (!PyArg_UnpackTuple(args, "ifilter", 2, 2, &func, &seq))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2962 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2963
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2964 /* Get iterator. */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2965 it = PyObject_GetIter(seq);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2966 if (it == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2967 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2968
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2969 /* create ifilterobject structure */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2970 lz = (ifilterobject *)type->tp_alloc(type, 0);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2971 if (lz == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2972 Py_DECREF(it);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2973 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2974 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2975 Py_INCREF(func);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2976 lz->func = func;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2977 lz->it = it;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2978
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2979 return (PyObject *)lz;
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
2980 }
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
2981
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
2982 static void
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
2983 ifilter_dealloc(ifilterobject *lz)
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
2984 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2985 PyObject_GC_UnTrack(lz);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2986 Py_XDECREF(lz->func);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2987 Py_XDECREF(lz->it);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2988 Py_TYPE(lz)->tp_free(lz);
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
2989 }
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
2990
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
2991 static int
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
2992 ifilter_traverse(ifilterobject *lz, visitproc visit, void *arg)
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
2993 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2994 Py_VISIT(lz->it);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2995 Py_VISIT(lz->func);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
2996 return 0;
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
2997 }
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
2998
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
2999 static PyObject *
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3000 ifilter_next(ifilterobject *lz)
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3001 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3002 PyObject *item;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3003 PyObject *it = lz->it;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3004 long ok;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3005 PyObject *(*iternext)(PyObject *);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3006
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3007 iternext = *Py_TYPE(it)->tp_iternext;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3008 for (;;) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3009 item = iternext(it);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3010 if (item == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3011 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3012
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3013 if (lz->func == Py_None || lz->func == (PyObject *)&PyBool_Type) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3014 ok = PyObject_IsTrue(item);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3015 } else {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3016 PyObject *good;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3017 good = PyObject_CallFunctionObjArgs(lz->func,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3018 item, NULL);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3019 if (good == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3020 Py_DECREF(item);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3021 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3022 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3023 ok = PyObject_IsTrue(good);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3024 Py_DECREF(good);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3025 }
78603
ba1c48f8b571 Issue #15604: Update uses of PyObject_IsTrue() to check for and handle errors correctly.
Antoine Pitrou <solipsis@pitrou.net>
parents: 72461
diff changeset
3026 if (ok > 0)
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3027 return item;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3028 Py_DECREF(item);
78603
ba1c48f8b571 Issue #15604: Update uses of PyObject_IsTrue() to check for and handle errors correctly.
Antoine Pitrou <solipsis@pitrou.net>
parents: 72461
diff changeset
3029 if (ok < 0)
ba1c48f8b571 Issue #15604: Update uses of PyObject_IsTrue() to check for and handle errors correctly.
Antoine Pitrou <solipsis@pitrou.net>
parents: 72461
diff changeset
3030 return NULL;
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3031 }
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3032 }
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3033
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3034 PyDoc_STRVAR(ifilter_doc,
27769
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3035 "ifilter(function or None, sequence) --> ifilter object\n\
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3036 \n\
27769
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3037 Return those items of sequence for which function(item) is true.\n\
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3038 If function is None, return the items that are true.");
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3039
29850
45dc33433323 SF patch #770521: make itertools type declarations static
Raymond Hettinger <python@rcn.com>
parents: 29535
diff changeset
3040 static PyTypeObject ifilter_type = {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3041 PyVarObject_HEAD_INIT(NULL, 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3042 "itertools.ifilter", /* tp_name */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3043 sizeof(ifilterobject), /* tp_basicsize */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3044 0, /* tp_itemsize */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3045 /* methods */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3046 (destructor)ifilter_dealloc, /* tp_dealloc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3047 0, /* tp_print */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3048 0, /* tp_getattr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3049 0, /* tp_setattr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3050 0, /* tp_compare */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3051 0, /* tp_repr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3052 0, /* tp_as_number */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3053 0, /* tp_as_sequence */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3054 0, /* tp_as_mapping */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3055 0, /* tp_hash */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3056 0, /* tp_call */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3057 0, /* tp_str */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3058 PyObject_GenericGetAttr, /* tp_getattro */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3059 0, /* tp_setattro */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3060 0, /* tp_as_buffer */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3061 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3062 Py_TPFLAGS_BASETYPE, /* tp_flags */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3063 ifilter_doc, /* tp_doc */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3064 (traverseproc)ifilter_traverse, /* tp_traverse */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3065 0, /* tp_clear */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3066 0, /* tp_richcompare */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3067 0, /* tp_weaklistoffset */
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parents: 57521
diff changeset
3068 PyObject_SelfIter, /* tp_iter */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3069 (iternextfunc)ifilter_next, /* tp_iternext */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3070 0, /* tp_methods */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3071 0, /* tp_members */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3072 0, /* tp_getset */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3073 0, /* tp_base */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3074 0, /* tp_dict */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3075 0, /* tp_descr_get */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3076 0, /* tp_descr_set */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3077 0, /* tp_dictoffset */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3078 0, /* tp_init */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3079 0, /* tp_alloc */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3080 ifilter_new, /* tp_new */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3081 PyObject_GC_Del, /* tp_free */
27769
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3082 };
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3083
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3084
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3085 /* ifilterfalse object ************************************************************/
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3086
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3087 typedef struct {
61465
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diff changeset
3088 PyObject_HEAD
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parents: 57521
diff changeset
3089 PyObject *func;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3090 PyObject *it;
27769
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3091 } ifilterfalseobject;
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3092
29850
45dc33433323 SF patch #770521: make itertools type declarations static
Raymond Hettinger <python@rcn.com>
parents: 29535
diff changeset
3093 static PyTypeObject ifilterfalse_type;
27769
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3094
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3095 static PyObject *
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3096 ifilterfalse_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3097 {
61465
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diff changeset
3098 PyObject *func, *seq;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3099 PyObject *it;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3100 ifilterfalseobject *lz;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3101
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parents: 57521
diff changeset
3102 if (type == &ifilterfalse_type &&
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3103 !_PyArg_NoKeywords("ifilterfalse()", kwds))
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3104 return NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3105
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parents: 57521
diff changeset
3106 if (!PyArg_UnpackTuple(args, "ifilterfalse", 2, 2, &func, &seq))
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parents: 57521
diff changeset
3107 return NULL;
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parents: 57521
diff changeset
3108
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parents: 57521
diff changeset
3109 /* Get iterator. */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3110 it = PyObject_GetIter(seq);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3111 if (it == NULL)
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parents: 57521
diff changeset
3112 return NULL;
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parents: 57521
diff changeset
3113
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parents: 57521
diff changeset
3114 /* create ifilterfalseobject structure */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3115 lz = (ifilterfalseobject *)type->tp_alloc(type, 0);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3116 if (lz == NULL) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3117 Py_DECREF(it);
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parents: 57521
diff changeset
3118 return NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3119 }
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parents: 57521
diff changeset
3120 Py_INCREF(func);
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parents: 57521
diff changeset
3121 lz->func = func;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3122 lz->it = it;
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diff changeset
3123
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diff changeset
3124 return (PyObject *)lz;
27769
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3125 }
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3126
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3127 static void
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3128 ifilterfalse_dealloc(ifilterfalseobject *lz)
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3129 {
61465
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diff changeset
3130 PyObject_GC_UnTrack(lz);
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parents: 57521
diff changeset
3131 Py_XDECREF(lz->func);
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parents: 57521
diff changeset
3132 Py_XDECREF(lz->it);
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diff changeset
3133 Py_TYPE(lz)->tp_free(lz);
27769
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
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diff changeset
3134 }
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3135
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3136 static int
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3137 ifilterfalse_traverse(ifilterfalseobject *lz, visitproc visit, void *arg)
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3138 {
61465
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diff changeset
3139 Py_VISIT(lz->it);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3140 Py_VISIT(lz->func);
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parents: 57521
diff changeset
3141 return 0;
27769
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3142 }
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3143
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3144 static PyObject *
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3145 ifilterfalse_next(ifilterfalseobject *lz)
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3146 {
61465
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parents: 57521
diff changeset
3147 PyObject *item;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3148 PyObject *it = lz->it;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3149 long ok;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3150 PyObject *(*iternext)(PyObject *);
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parents: 57521
diff changeset
3151
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parents: 57521
diff changeset
3152 iternext = *Py_TYPE(it)->tp_iternext;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3153 for (;;) {
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parents: 57521
diff changeset
3154 item = iternext(it);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3155 if (item == NULL)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3156 return NULL;
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parents: 57521
diff changeset
3157
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parents: 57521
diff changeset
3158 if (lz->func == Py_None || lz->func == (PyObject *)&PyBool_Type) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3159 ok = PyObject_IsTrue(item);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3160 } else {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3161 PyObject *good;
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parents: 57521
diff changeset
3162 good = PyObject_CallFunctionObjArgs(lz->func,
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parents: 57521
diff changeset
3163 item, NULL);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3164 if (good == NULL) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3165 Py_DECREF(item);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3166 return NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3167 }
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parents: 57521
diff changeset
3168 ok = PyObject_IsTrue(good);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3169 Py_DECREF(good);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3170 }
78603
ba1c48f8b571 Issue #15604: Update uses of PyObject_IsTrue() to check for and handle errors correctly.
Antoine Pitrou <solipsis@pitrou.net>
parents: 72461
diff changeset
3171 if (ok == 0)
61465
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diff changeset
3172 return item;
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parents: 57521
diff changeset
3173 Py_DECREF(item);
78603
ba1c48f8b571 Issue #15604: Update uses of PyObject_IsTrue() to check for and handle errors correctly.
Antoine Pitrou <solipsis@pitrou.net>
parents: 72461
diff changeset
3174 if (ok < 0)
ba1c48f8b571 Issue #15604: Update uses of PyObject_IsTrue() to check for and handle errors correctly.
Antoine Pitrou <solipsis@pitrou.net>
parents: 72461
diff changeset
3175 return NULL;
61465
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diff changeset
3176 }
27769
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Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3177 }
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3178
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3179 PyDoc_STRVAR(ifilterfalse_doc,
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3180 "ifilterfalse(function or None, sequence) --> ifilterfalse object\n\
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3181 \n\
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3182 Return those items of sequence for which function(item) is false.\n\
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3183 If function is None, return the items that are false.");
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
3184
29850
45dc33433323 SF patch #770521: make itertools type declarations static
Raymond Hettinger <python@rcn.com>
parents: 29535
diff changeset
3185 static PyTypeObject ifilterfalse_type = {
61465
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diff changeset
3186 PyVarObject_HEAD_INIT(NULL, 0)
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parents: 57521
diff changeset
3187 "itertools.ifilterfalse", /* tp_name */
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parents: 57521
diff changeset
3188 sizeof(ifilterfalseobject), /* tp_basicsize */
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parents: 57521
diff changeset
3189 0, /* tp_itemsize */
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parents: 57521
diff changeset
3190 /* methods */
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parents: 57521
diff changeset
3191 (destructor)ifilterfalse_dealloc, /* tp_dealloc */
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parents: 57521
diff changeset
3192 0, /* tp_print */
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parents: 57521
diff changeset
3193 0, /* tp_getattr */
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parents: 57521
diff changeset
3194 0, /* tp_setattr */
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diff changeset
3195 0, /* tp_compare */
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diff changeset
3196 0, /* tp_repr */
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diff changeset
3197 0, /* tp_as_number */
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parents: 57521
diff changeset
3198 0, /* tp_as_sequence */
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parents: 57521
diff changeset
3199 0, /* tp_as_mapping */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3200 0, /* tp_hash */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3201 0, /* tp_call */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3202 0, /* tp_str */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3203 PyObject_GenericGetAttr, /* tp_getattro */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3204 0, /* tp_setattro */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3205 0, /* tp_as_buffer */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3206 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3207 Py_TPFLAGS_BASETYPE, /* tp_flags */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3208 ifilterfalse_doc, /* tp_doc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3209 (traverseproc)ifilterfalse_traverse, /* tp_traverse */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3210 0, /* tp_clear */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3211 0, /* tp_richcompare */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3212 0, /* tp_weaklistoffset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3213 PyObject_SelfIter, /* tp_iter */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3214 (iternextfunc)ifilterfalse_next, /* tp_iternext */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3215 0, /* tp_methods */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3216 0, /* tp_members */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3217 0, /* tp_getset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3218 0, /* tp_base */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3219 0, /* tp_dict */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3220 0, /* tp_descr_get */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3221 0, /* tp_descr_set */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3222 0, /* tp_dictoffset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3223 0, /* tp_init */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3224 0, /* tp_alloc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3225 ifilterfalse_new, /* tp_new */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3226 PyObject_GC_Del, /* tp_free */
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3227 };
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3228
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3229
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3230 /* count object ************************************************************/
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3231
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3232 typedef struct {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3233 PyObject_HEAD
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3234 Py_ssize_t cnt;
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3235 PyObject *long_cnt;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3236 PyObject *long_step;
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3237 } countobject;
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3238
51541
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments.
Raymond Hettinger <python@rcn.com>
parents: 51486
diff changeset
3239 /* Counting logic and invariants:
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments.
Raymond Hettinger <python@rcn.com>
parents: 51486
diff changeset
3240
51772
3e27d606d625 Fix keyword arguments for itertools.count().
Raymond Hettinger <python@rcn.com>
parents: 51718
diff changeset
3241 fast_mode: when cnt an integer < PY_SSIZE_T_MAX and no step is specified.
51541
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments.
Raymond Hettinger <python@rcn.com>
parents: 51486
diff changeset
3242
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3243 assert(cnt != PY_SSIZE_T_MAX && long_cnt == NULL && long_step==PyInt(1));
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3244 Advances with: cnt += 1
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3245 When count hits Y_SSIZE_T_MAX, switch to slow_mode.
51772
3e27d606d625 Fix keyword arguments for itertools.count().
Raymond Hettinger <python@rcn.com>
parents: 51718
diff changeset
3246
3e27d606d625 Fix keyword arguments for itertools.count().
Raymond Hettinger <python@rcn.com>
parents: 51718
diff changeset
3247 slow_mode: when cnt == PY_SSIZE_T_MAX, step is not int(1), or cnt is a float.
51541
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments.
Raymond Hettinger <python@rcn.com>
parents: 51486
diff changeset
3248
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3249 assert(cnt == PY_SSIZE_T_MAX && long_cnt != NULL && long_step != NULL);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3250 All counting is done with python objects (no overflows or underflows).
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3251 Advances with: long_cnt += long_step
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3252 Step may be zero -- effectively a slow version of repeat(cnt).
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3253 Either long_cnt or long_step may be a float, Fraction, or Decimal.
51541
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments.
Raymond Hettinger <python@rcn.com>
parents: 51486
diff changeset
3254 */
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments.
Raymond Hettinger <python@rcn.com>
parents: 51486
diff changeset
3255
29850
45dc33433323 SF patch #770521: make itertools type declarations static
Raymond Hettinger <python@rcn.com>
parents: 29535
diff changeset
3256 static PyTypeObject count_type;
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3257
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3258 static PyObject *
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3259 count_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3260 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3261 countobject *lz;
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3262 int slow_mode = 0;
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3263 Py_ssize_t cnt = 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3264 PyObject *long_cnt = NULL;
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3265 PyObject *long_step = NULL;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3266 static char *kwlist[] = {"start", "step", 0};
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3267
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3268 if (!PyArg_ParseTupleAndKeywords(args, kwds, "|OO:count",
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3269 kwlist, &long_cnt, &long_step))
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3270 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3271
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3272 if ((long_cnt != NULL && !PyNumber_Check(long_cnt)) ||
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3273 (long_step != NULL && !PyNumber_Check(long_step))) {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3274 PyErr_SetString(PyExc_TypeError, "a number is required");
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3275 return NULL;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3276 }
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3277
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3278 if (long_cnt != NULL) {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3279 cnt = PyInt_AsSsize_t(long_cnt);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3280 if ((cnt == -1 && PyErr_Occurred()) || !PyInt_Check(long_cnt)) {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3281 PyErr_Clear();
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3282 slow_mode = 1;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3283 }
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3284 Py_INCREF(long_cnt);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3285 } else {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3286 cnt = 0;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3287 long_cnt = PyInt_FromLong(0);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3288 }
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3289
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3290 /* If not specified, step defaults to 1 */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3291 if (long_step == NULL) {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3292 long_step = PyInt_FromLong(1);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3293 if (long_step == NULL) {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3294 Py_DECREF(long_cnt);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3295 return NULL;
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3296 }
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3297 } else
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3298 Py_INCREF(long_step);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3299
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3300 assert(long_cnt != NULL && long_step != NULL);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3301
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3302 /* Fast mode only works when the step is 1 */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3303 if (!PyInt_Check(long_step) ||
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3304 PyInt_AS_LONG(long_step) != 1) {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3305 slow_mode = 1;
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3306 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3307
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3308 if (slow_mode)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3309 cnt = PY_SSIZE_T_MAX;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3310 else
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3311 Py_CLEAR(long_cnt);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3312
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3313 assert((cnt != PY_SSIZE_T_MAX && long_cnt == NULL && !slow_mode) ||
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3314 (cnt == PY_SSIZE_T_MAX && long_cnt != NULL && slow_mode));
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3315 assert(slow_mode ||
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3316 (PyInt_Check(long_step) && PyInt_AS_LONG(long_step) == 1));
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3317
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3318 /* create countobject structure */
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3319 lz = (countobject *)type->tp_alloc(type, 0);
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3320 if (lz == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3321 Py_XDECREF(long_cnt);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3322 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3323 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3324 lz->cnt = cnt;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3325 lz->long_cnt = long_cnt;
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3326 lz->long_step = long_step;
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3327
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3328 return (PyObject *)lz;
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3329 }
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3330
43458
333b052e9da9 itertools.count() no longer limited to sys.maxint.
Raymond Hettinger <python@rcn.com>
parents: 42333
diff changeset
3331 static void
333b052e9da9 itertools.count() no longer limited to sys.maxint.
Raymond Hettinger <python@rcn.com>
parents: 42333
diff changeset
3332 count_dealloc(countobject *lz)
333b052e9da9 itertools.count() no longer limited to sys.maxint.
Raymond Hettinger <python@rcn.com>
parents: 42333
diff changeset
3333 {
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3334 PyObject_GC_UnTrack(lz);
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3335 Py_XDECREF(lz->long_cnt);
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3336 Py_XDECREF(lz->long_step);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3337 Py_TYPE(lz)->tp_free(lz);
51660
0ebbcf5988db Add GC support to count() objects. Backport candidate.
Raymond Hettinger <python@rcn.com>
parents: 51622
diff changeset
3338 }
0ebbcf5988db Add GC support to count() objects. Backport candidate.
Raymond Hettinger <python@rcn.com>
parents: 51622
diff changeset
3339
51663
27d43d66bd09 fix compiler warnings
Benjamin Peterson <benjamin@python.org>
parents: 51660
diff changeset
3340 static int
51660
0ebbcf5988db Add GC support to count() objects. Backport candidate.
Raymond Hettinger <python@rcn.com>
parents: 51622
diff changeset
3341 count_traverse(countobject *lz, visitproc visit, void *arg)
0ebbcf5988db Add GC support to count() objects. Backport candidate.
Raymond Hettinger <python@rcn.com>
parents: 51622
diff changeset
3342 {
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3343 Py_VISIT(lz->long_cnt);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3344 Py_VISIT(lz->long_step);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3345 return 0;
43458
333b052e9da9 itertools.count() no longer limited to sys.maxint.
Raymond Hettinger <python@rcn.com>
parents: 42333
diff changeset
3346 }
333b052e9da9 itertools.count() no longer limited to sys.maxint.
Raymond Hettinger <python@rcn.com>
parents: 42333
diff changeset
3347
333b052e9da9 itertools.count() no longer limited to sys.maxint.
Raymond Hettinger <python@rcn.com>
parents: 42333
diff changeset
3348 static PyObject *
333b052e9da9 itertools.count() no longer limited to sys.maxint.
Raymond Hettinger <python@rcn.com>
parents: 42333
diff changeset
3349 count_nextlong(countobject *lz)
333b052e9da9 itertools.count() no longer limited to sys.maxint.
Raymond Hettinger <python@rcn.com>
parents: 42333
diff changeset
3350 {
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3351 PyObject *long_cnt;
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3352 PyObject *stepped_up;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3353
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3354 long_cnt = lz->long_cnt;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3355 if (long_cnt == NULL) {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3356 /* Switch to slow_mode */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3357 long_cnt = PyInt_FromSsize_t(PY_SSIZE_T_MAX);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3358 if (long_cnt == NULL)
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3359 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3360 }
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3361 assert(lz->cnt == PY_SSIZE_T_MAX && long_cnt != NULL);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3362
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3363 stepped_up = PyNumber_Add(long_cnt, lz->long_step);
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3364 if (stepped_up == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3365 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3366 lz->long_cnt = stepped_up;
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3367 return long_cnt;
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3368 }
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3369
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3370 static PyObject *
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3371 count_next(countobject *lz)
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3372 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3373 if (lz->cnt == PY_SSIZE_T_MAX)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3374 return count_nextlong(lz);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3375 return PyInt_FromSsize_t(lz->cnt++);
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3376 }
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3377
31890
848bce2215d3 Provide more information representations of repeat() and count().
Raymond Hettinger <python@rcn.com>
parents: 31675
diff changeset
3378 static PyObject *
848bce2215d3 Provide more information representations of repeat() and count().
Raymond Hettinger <python@rcn.com>
parents: 31675
diff changeset
3379 count_repr(countobject *lz)
848bce2215d3 Provide more information representations of repeat() and count().
Raymond Hettinger <python@rcn.com>
parents: 31675
diff changeset
3380 {
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3381 PyObject *cnt_repr, *step_repr = NULL;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3382 PyObject *result = NULL;
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3383
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3384 if (lz->cnt != PY_SSIZE_T_MAX)
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3385 return PyString_FromFormat("count(%zd)", lz->cnt);
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3386
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3387 cnt_repr = PyObject_Repr(lz->long_cnt);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3388 if (cnt_repr == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3389 return NULL;
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3390
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3391 if (PyInt_Check(lz->long_step) && PyInt_AS_LONG(lz->long_step) == 1) {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3392 /* Don't display step when it is an integer equal to 1 */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3393 result = PyString_FromFormat("count(%s)",
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3394 PyString_AS_STRING(cnt_repr));
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3395 } else {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3396 step_repr = PyObject_Repr(lz->long_step);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3397 if (step_repr != NULL)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3398 result = PyString_FromFormat("count(%s, %s)",
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3399 PyString_AS_STRING(cnt_repr),
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3400 PyString_AS_STRING(step_repr));
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3401 }
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3402 Py_DECREF(cnt_repr);
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3403 Py_XDECREF(step_repr);
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3404 return result;
31890
848bce2215d3 Provide more information representations of repeat() and count().
Raymond Hettinger <python@rcn.com>
parents: 31675
diff changeset
3405 }
848bce2215d3 Provide more information representations of repeat() and count().
Raymond Hettinger <python@rcn.com>
parents: 31675
diff changeset
3406
57517
1ff2c3edc13c Issue #7410: deepcopy of itertools.count() erroneously reset the count.
Raymond Hettinger <python@rcn.com>
parents: 57345
diff changeset
3407 static PyObject *
1ff2c3edc13c Issue #7410: deepcopy of itertools.count() erroneously reset the count.
Raymond Hettinger <python@rcn.com>
parents: 57345
diff changeset
3408 count_reduce(countobject *lz)
1ff2c3edc13c Issue #7410: deepcopy of itertools.count() erroneously reset the count.
Raymond Hettinger <python@rcn.com>
parents: 57345
diff changeset
3409 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3410 if (lz->cnt == PY_SSIZE_T_MAX)
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3411 return Py_BuildValue("O(OO)", Py_TYPE(lz), lz->long_cnt, lz->long_step);
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3412 return Py_BuildValue("O(n)", Py_TYPE(lz), lz->cnt);
57517
1ff2c3edc13c Issue #7410: deepcopy of itertools.count() erroneously reset the count.
Raymond Hettinger <python@rcn.com>
parents: 57345
diff changeset
3413 }
1ff2c3edc13c Issue #7410: deepcopy of itertools.count() erroneously reset the count.
Raymond Hettinger <python@rcn.com>
parents: 57345
diff changeset
3414
1ff2c3edc13c Issue #7410: deepcopy of itertools.count() erroneously reset the count.
Raymond Hettinger <python@rcn.com>
parents: 57345
diff changeset
3415 PyDoc_STRVAR(count_reduce_doc, "Return state information for pickling.");
1ff2c3edc13c Issue #7410: deepcopy of itertools.count() erroneously reset the count.
Raymond Hettinger <python@rcn.com>
parents: 57345
diff changeset
3416
1ff2c3edc13c Issue #7410: deepcopy of itertools.count() erroneously reset the count.
Raymond Hettinger <python@rcn.com>
parents: 57345
diff changeset
3417 static PyMethodDef count_methods[] = {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3418 {"__reduce__", (PyCFunction)count_reduce, METH_NOARGS,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3419 count_reduce_doc},
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3420 {NULL, NULL} /* sentinel */
57517
1ff2c3edc13c Issue #7410: deepcopy of itertools.count() erroneously reset the count.
Raymond Hettinger <python@rcn.com>
parents: 57345
diff changeset
3421 };
1ff2c3edc13c Issue #7410: deepcopy of itertools.count() erroneously reset the count.
Raymond Hettinger <python@rcn.com>
parents: 57345
diff changeset
3422
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3423 PyDoc_STRVAR(count_doc,
62237
7ef46a61dc97 Remove extra ] from itertools.count docstring.
Ezio Melotti <ezio.melotti@gmail.com>
parents: 61463
diff changeset
3424 "count(start=0, step=1) --> count object\n\
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3425 \n\
51772
3e27d606d625 Fix keyword arguments for itertools.count().
Raymond Hettinger <python@rcn.com>
parents: 51718
diff changeset
3426 Return a count object whose .next() method returns consecutive values.\n\
3e27d606d625 Fix keyword arguments for itertools.count().
Raymond Hettinger <python@rcn.com>
parents: 51718
diff changeset
3427 Equivalent to:\n\n\
51541
cbd53ff49557 Issue 5032: added a step argument to itertools.count() and allowed non-integer arguments.
Raymond Hettinger <python@rcn.com>
parents: 51486
diff changeset
3428 def count(firstval=0, step=1):\n\
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3429 x = firstval\n\
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3430 while 1:\n\
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3431 yield x\n\
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3432 x += step\n");
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3433
29850
45dc33433323 SF patch #770521: make itertools type declarations static
Raymond Hettinger <python@rcn.com>
parents: 29535
diff changeset
3434 static PyTypeObject count_type = {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3435 PyVarObject_HEAD_INIT(NULL, 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3436 "itertools.count", /* tp_name */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3437 sizeof(countobject), /* tp_basicsize */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3438 0, /* tp_itemsize */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3439 /* methods */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3440 (destructor)count_dealloc, /* tp_dealloc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3441 0, /* tp_print */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3442 0, /* tp_getattr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3443 0, /* tp_setattr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3444 0, /* tp_compare */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3445 (reprfunc)count_repr, /* tp_repr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3446 0, /* tp_as_number */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3447 0, /* tp_as_sequence */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3448 0, /* tp_as_mapping */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3449 0, /* tp_hash */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3450 0, /* tp_call */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3451 0, /* tp_str */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3452 PyObject_GenericGetAttr, /* tp_getattro */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3453 0, /* tp_setattro */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3454 0, /* tp_as_buffer */
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3455 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3456 Py_TPFLAGS_BASETYPE, /* tp_flags */
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3457 count_doc, /* tp_doc */
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3458 (traverseproc)count_traverse, /* tp_traverse */
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3459 0, /* tp_clear */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3460 0, /* tp_richcompare */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3461 0, /* tp_weaklistoffset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3462 PyObject_SelfIter, /* tp_iter */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3463 (iternextfunc)count_next, /* tp_iternext */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3464 count_methods, /* tp_methods */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3465 0, /* tp_members */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3466 0, /* tp_getset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3467 0, /* tp_base */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3468 0, /* tp_dict */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3469 0, /* tp_descr_get */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3470 0, /* tp_descr_set */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3471 0, /* tp_dictoffset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3472 0, /* tp_init */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3473 0, /* tp_alloc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3474 count_new, /* tp_new */
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3475 PyObject_GC_Del, /* tp_free */
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3476 };
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3477
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3478
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3479 /* izip object ************************************************************/
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3480
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3481 #include "Python.h"
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3482
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3483 typedef struct {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3484 PyObject_HEAD
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3485 Py_ssize_t tuplesize;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3486 PyObject *ittuple; /* tuple of iterators */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3487 PyObject *result;
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3488 } izipobject;
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3489
29850
45dc33433323 SF patch #770521: make itertools type declarations static
Raymond Hettinger <python@rcn.com>
parents: 29535
diff changeset
3490 static PyTypeObject izip_type;
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3491
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3492 static PyObject *
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3493 izip_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3494 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3495 izipobject *lz;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3496 Py_ssize_t i;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3497 PyObject *ittuple; /* tuple of iterators */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3498 PyObject *result;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3499 Py_ssize_t tuplesize = PySequence_Length(args);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3500
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3501 if (type == &izip_type && !_PyArg_NoKeywords("izip()", kwds))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3502 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3503
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3504 /* args must be a tuple */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3505 assert(PyTuple_Check(args));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3506
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3507 /* obtain iterators */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3508 ittuple = PyTuple_New(tuplesize);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3509 if (ittuple == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3510 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3511 for (i=0; i < tuplesize; ++i) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3512 PyObject *item = PyTuple_GET_ITEM(args, i);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3513 PyObject *it = PyObject_GetIter(item);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3514 if (it == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3515 if (PyErr_ExceptionMatches(PyExc_TypeError))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3516 PyErr_Format(PyExc_TypeError,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3517 "izip argument #%zd must support iteration",
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3518 i+1);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3519 Py_DECREF(ittuple);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3520 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3521 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3522 PyTuple_SET_ITEM(ittuple, i, it);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3523 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3524
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3525 /* create a result holder */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3526 result = PyTuple_New(tuplesize);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3527 if (result == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3528 Py_DECREF(ittuple);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3529 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3530 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3531 for (i=0 ; i < tuplesize ; i++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3532 Py_INCREF(Py_None);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3533 PyTuple_SET_ITEM(result, i, Py_None);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3534 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3535
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3536 /* create izipobject structure */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3537 lz = (izipobject *)type->tp_alloc(type, 0);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3538 if (lz == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3539 Py_DECREF(ittuple);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3540 Py_DECREF(result);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3541 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3542 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3543 lz->ittuple = ittuple;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3544 lz->tuplesize = tuplesize;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3545 lz->result = result;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3546
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3547 return (PyObject *)lz;
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3548 }
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3549
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3550 static void
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3551 izip_dealloc(izipobject *lz)
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3552 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3553 PyObject_GC_UnTrack(lz);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3554 Py_XDECREF(lz->ittuple);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3555 Py_XDECREF(lz->result);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3556 Py_TYPE(lz)->tp_free(lz);
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3557 }
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3558
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3559 static int
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3560 izip_traverse(izipobject *lz, visitproc visit, void *arg)
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3561 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3562 Py_VISIT(lz->ittuple);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3563 Py_VISIT(lz->result);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3564 return 0;
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3565 }
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3566
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3567 static PyObject *
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3568 izip_next(izipobject *lz)
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3569 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3570 Py_ssize_t i;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3571 Py_ssize_t tuplesize = lz->tuplesize;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3572 PyObject *result = lz->result;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3573 PyObject *it;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3574 PyObject *item;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3575 PyObject *olditem;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3576
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3577 if (tuplesize == 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3578 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3579 if (Py_REFCNT(result) == 1) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3580 Py_INCREF(result);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3581 for (i=0 ; i < tuplesize ; i++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3582 it = PyTuple_GET_ITEM(lz->ittuple, i);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3583 item = (*Py_TYPE(it)->tp_iternext)(it);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3584 if (item == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3585 Py_DECREF(result);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3586 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3587 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3588 olditem = PyTuple_GET_ITEM(result, i);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3589 PyTuple_SET_ITEM(result, i, item);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3590 Py_DECREF(olditem);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3591 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3592 } else {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3593 result = PyTuple_New(tuplesize);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3594 if (result == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3595 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3596 for (i=0 ; i < tuplesize ; i++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3597 it = PyTuple_GET_ITEM(lz->ittuple, i);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3598 item = (*Py_TYPE(it)->tp_iternext)(it);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3599 if (item == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3600 Py_DECREF(result);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3601 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3602 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3603 PyTuple_SET_ITEM(result, i, item);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3604 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3605 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3606 return result;
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3607 }
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3608
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3609 PyDoc_STRVAR(izip_doc,
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3610 "izip(iter1 [,iter2 [...]]) --> izip object\n\
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3611 \n\
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3612 Return a izip object whose .next() method returns a tuple where\n\
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3613 the i-th element comes from the i-th iterable argument. The .next()\n\
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3614 method continues until the shortest iterable in the argument sequence\n\
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3615 is exhausted and then it raises StopIteration. Works like the zip()\n\
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3616 function but consumes less memory by returning an iterator instead of\n\
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3617 a list.");
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3618
29850
45dc33433323 SF patch #770521: make itertools type declarations static
Raymond Hettinger <python@rcn.com>
parents: 29535
diff changeset
3619 static PyTypeObject izip_type = {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3620 PyVarObject_HEAD_INIT(NULL, 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3621 "itertools.izip", /* tp_name */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3622 sizeof(izipobject), /* tp_basicsize */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3623 0, /* tp_itemsize */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3624 /* methods */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3625 (destructor)izip_dealloc, /* tp_dealloc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3626 0, /* tp_print */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3627 0, /* tp_getattr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3628 0, /* tp_setattr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3629 0, /* tp_compare */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3630 0, /* tp_repr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3631 0, /* tp_as_number */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3632 0, /* tp_as_sequence */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3633 0, /* tp_as_mapping */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3634 0, /* tp_hash */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3635 0, /* tp_call */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3636 0, /* tp_str */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3637 PyObject_GenericGetAttr, /* tp_getattro */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3638 0, /* tp_setattro */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3639 0, /* tp_as_buffer */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3640 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3641 Py_TPFLAGS_BASETYPE, /* tp_flags */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3642 izip_doc, /* tp_doc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3643 (traverseproc)izip_traverse, /* tp_traverse */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3644 0, /* tp_clear */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3645 0, /* tp_richcompare */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3646 0, /* tp_weaklistoffset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3647 PyObject_SelfIter, /* tp_iter */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3648 (iternextfunc)izip_next, /* tp_iternext */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3649 0, /* tp_methods */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3650 0, /* tp_members */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3651 0, /* tp_getset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3652 0, /* tp_base */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3653 0, /* tp_dict */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3654 0, /* tp_descr_get */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3655 0, /* tp_descr_set */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3656 0, /* tp_dictoffset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3657 0, /* tp_init */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3658 0, /* tp_alloc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3659 izip_new, /* tp_new */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3660 PyObject_GC_Del, /* tp_free */
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3661 };
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3662
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3663
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3664 /* repeat object ************************************************************/
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3665
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3666 typedef struct {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3667 PyObject_HEAD
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3668 PyObject *element;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3669 Py_ssize_t cnt;
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3670 } repeatobject;
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3671
29850
45dc33433323 SF patch #770521: make itertools type declarations static
Raymond Hettinger <python@rcn.com>
parents: 29535
diff changeset
3672 static PyTypeObject repeat_type;
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3673
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3674 static PyObject *
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3675 repeat_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3676 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3677 repeatobject *ro;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3678 PyObject *element;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3679 Py_ssize_t cnt = -1;
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3680 static char *kwargs[] = {"object", "times", NULL};
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3681
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3682 if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|n:repeat", kwargs,
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
3683 &element, &cnt))
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3684 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3685
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3686 if (PyTuple_Size(args) == 2 && cnt < 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3687 cnt = 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3688
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3689 ro = (repeatobject *)type->tp_alloc(type, 0);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3690 if (ro == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3691 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3692 Py_INCREF(element);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3693 ro->element = element;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3694 ro->cnt = cnt;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3695 return (PyObject *)ro;
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3696 }
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3697
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3698 static void
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3699 repeat_dealloc(repeatobject *ro)
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3700 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3701 PyObject_GC_UnTrack(ro);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3702 Py_XDECREF(ro->element);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3703 Py_TYPE(ro)->tp_free(ro);
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3704 }
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3705
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3706 static int
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3707 repeat_traverse(repeatobject *ro, visitproc visit, void *arg)
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3708 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3709 Py_VISIT(ro->element);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3710 return 0;
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3711 }
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3712
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3713 static PyObject *
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3714 repeat_next(repeatobject *ro)
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3715 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3716 if (ro->cnt == 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3717 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3718 if (ro->cnt > 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3719 ro->cnt--;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3720 Py_INCREF(ro->element);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3721 return ro->element;
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3722 }
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3723
31890
848bce2215d3 Provide more information representations of repeat() and count().
Raymond Hettinger <python@rcn.com>
parents: 31675
diff changeset
3724 static PyObject *
848bce2215d3 Provide more information representations of repeat() and count().
Raymond Hettinger <python@rcn.com>
parents: 31675
diff changeset
3725 repeat_repr(repeatobject *ro)
848bce2215d3 Provide more information representations of repeat() and count().
Raymond Hettinger <python@rcn.com>
parents: 31675
diff changeset
3726 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3727 PyObject *result, *objrepr;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3728
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3729 objrepr = PyObject_Repr(ro->element);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3730 if (objrepr == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3731 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3732
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3733 if (ro->cnt == -1)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3734 result = PyString_FromFormat("repeat(%s)",
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3735 PyString_AS_STRING(objrepr));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3736 else
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3737 result = PyString_FromFormat("repeat(%s, %zd)",
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3738 PyString_AS_STRING(objrepr), ro->cnt);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3739 Py_DECREF(objrepr);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3740 return result;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3741 }
31890
848bce2215d3 Provide more information representations of repeat() and count().
Raymond Hettinger <python@rcn.com>
parents: 31675
diff changeset
3742
35636
e22334b1da67 Convert iterator __len__() methods to a private API.
Raymond Hettinger <python@rcn.com>
parents: 35449
diff changeset
3743 static PyObject *
31501
14f860b03be2 Give itertools.repeat() a length method.
Raymond Hettinger <python@rcn.com>
parents: 31136
diff changeset
3744 repeat_len(repeatobject *ro)
14f860b03be2 Give itertools.repeat() a length method.
Raymond Hettinger <python@rcn.com>
parents: 31136
diff changeset
3745 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3746 if (ro->cnt == -1) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3747 PyErr_SetString(PyExc_TypeError, "len() of unsized object");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3748 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3749 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3750 return PyInt_FromSize_t(ro->cnt);
31501
14f860b03be2 Give itertools.repeat() a length method.
Raymond Hettinger <python@rcn.com>
parents: 31136
diff changeset
3751 }
14f860b03be2 Give itertools.repeat() a length method.
Raymond Hettinger <python@rcn.com>
parents: 31136
diff changeset
3752
36484
20f75d5e79e9 Renamed _length_cue() to __length_hint__(). See:
Armin Rigo <arigo@tunes.org>
parents: 36324
diff changeset
3753 PyDoc_STRVAR(length_hint_doc, "Private method returning an estimate of len(list(it)).");
35636
e22334b1da67 Convert iterator __len__() methods to a private API.
Raymond Hettinger <python@rcn.com>
parents: 35449
diff changeset
3754
e22334b1da67 Convert iterator __len__() methods to a private API.
Raymond Hettinger <python@rcn.com>
parents: 35449
diff changeset
3755 static PyMethodDef repeat_methods[] = {
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3756 {"__length_hint__", (PyCFunction)repeat_len, METH_NOARGS, length_hint_doc},
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3757 {NULL, NULL} /* sentinel */
31501
14f860b03be2 Give itertools.repeat() a length method.
Raymond Hettinger <python@rcn.com>
parents: 31136
diff changeset
3758 };
14f860b03be2 Give itertools.repeat() a length method.
Raymond Hettinger <python@rcn.com>
parents: 31136
diff changeset
3759
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3760 PyDoc_STRVAR(repeat_doc,
51718
d25fc0209295 Add keyword arg support to itertools.repeat().
Raymond Hettinger <python@rcn.com>
parents: 51715
diff changeset
3761 "repeat(object [,times]) -> create an iterator which returns the object\n\
d25fc0209295 Add keyword arg support to itertools.repeat().
Raymond Hettinger <python@rcn.com>
parents: 51715
diff changeset
3762 for the specified number of times. If not specified, returns the object\n\
28024
61fa6b55c1de User requested changes to the itertools module.
Raymond Hettinger <python@rcn.com>
parents: 27770
diff changeset
3763 endlessly.");
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3764
29850
45dc33433323 SF patch #770521: make itertools type declarations static
Raymond Hettinger <python@rcn.com>
parents: 29535
diff changeset
3765 static PyTypeObject repeat_type = {
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3766 PyVarObject_HEAD_INIT(NULL, 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3767 "itertools.repeat", /* tp_name */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3768 sizeof(repeatobject), /* tp_basicsize */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3769 0, /* tp_itemsize */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3770 /* methods */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3771 (destructor)repeat_dealloc, /* tp_dealloc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3772 0, /* tp_print */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3773 0, /* tp_getattr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3774 0, /* tp_setattr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3775 0, /* tp_compare */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3776 (reprfunc)repeat_repr, /* tp_repr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3777 0, /* tp_as_number */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3778 0, /* tp_as_sequence */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3779 0, /* tp_as_mapping */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3780 0, /* tp_hash */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3781 0, /* tp_call */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3782 0, /* tp_str */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3783 PyObject_GenericGetAttr, /* tp_getattro */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3784 0, /* tp_setattro */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3785 0, /* tp_as_buffer */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3786 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3787 Py_TPFLAGS_BASETYPE, /* tp_flags */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3788 repeat_doc, /* tp_doc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3789 (traverseproc)repeat_traverse, /* tp_traverse */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3790 0, /* tp_clear */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3791 0, /* tp_richcompare */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3792 0, /* tp_weaklistoffset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3793 PyObject_SelfIter, /* tp_iter */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3794 (iternextfunc)repeat_next, /* tp_iternext */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3795 repeat_methods, /* tp_methods */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3796 0, /* tp_members */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3797 0, /* tp_getset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3798 0, /* tp_base */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3799 0, /* tp_dict */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3800 0, /* tp_descr_get */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3801 0, /* tp_descr_set */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3802 0, /* tp_dictoffset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3803 0, /* tp_init */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3804 0, /* tp_alloc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3805 repeat_new, /* tp_new */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3806 PyObject_GC_Del, /* tp_free */
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3807 };
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
3808
40877
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3809 /* iziplongest object ************************************************************/
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3810
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3811 #include "Python.h"
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3812
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3813 typedef struct {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3814 PyObject_HEAD
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3815 Py_ssize_t tuplesize;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3816 Py_ssize_t numactive;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3817 PyObject *ittuple; /* tuple of iterators */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3818 PyObject *result;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3819 PyObject *fillvalue;
40877
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3820 } iziplongestobject;
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3821
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3822 static PyTypeObject iziplongest_type;
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3823
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3824 static PyObject *
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3825 izip_longest_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3826 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3827 iziplongestobject *lz;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3828 Py_ssize_t i;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3829 PyObject *ittuple; /* tuple of iterators */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3830 PyObject *result;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3831 PyObject *fillvalue = Py_None;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3832 Py_ssize_t tuplesize = PySequence_Length(args);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3833
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3834 if (kwds != NULL && PyDict_CheckExact(kwds) && PyDict_Size(kwds) > 0) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3835 fillvalue = PyDict_GetItemString(kwds, "fillvalue");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3836 if (fillvalue == NULL || PyDict_Size(kwds) > 1) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3837 PyErr_SetString(PyExc_TypeError,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3838 "izip_longest() got an unexpected keyword argument");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3839 return NULL;
40877
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3840 }
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3841 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3842
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3843 /* args must be a tuple */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3844 assert(PyTuple_Check(args));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3845
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3846 /* obtain iterators */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3847 ittuple = PyTuple_New(tuplesize);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3848 if (ittuple == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3849 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3850 for (i=0; i < tuplesize; ++i) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3851 PyObject *item = PyTuple_GET_ITEM(args, i);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3852 PyObject *it = PyObject_GetIter(item);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3853 if (it == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3854 if (PyErr_ExceptionMatches(PyExc_TypeError))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3855 PyErr_Format(PyExc_TypeError,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3856 "izip_longest argument #%zd must support iteration",
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3857 i+1);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3858 Py_DECREF(ittuple);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3859 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3860 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3861 PyTuple_SET_ITEM(ittuple, i, it);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3862 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3863
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3864 /* create a result holder */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3865 result = PyTuple_New(tuplesize);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3866 if (result == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3867 Py_DECREF(ittuple);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3868 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3869 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3870 for (i=0 ; i < tuplesize ; i++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3871 Py_INCREF(Py_None);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3872 PyTuple_SET_ITEM(result, i, Py_None);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3873 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3874
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3875 /* create iziplongestobject structure */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3876 lz = (iziplongestobject *)type->tp_alloc(type, 0);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3877 if (lz == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3878 Py_DECREF(ittuple);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3879 Py_DECREF(result);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3880 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3881 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3882 lz->ittuple = ittuple;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3883 lz->tuplesize = tuplesize;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3884 lz->numactive = tuplesize;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3885 lz->result = result;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3886 Py_INCREF(fillvalue);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3887 lz->fillvalue = fillvalue;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3888 return (PyObject *)lz;
40877
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3889 }
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3890
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3891 static void
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3892 izip_longest_dealloc(iziplongestobject *lz)
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3893 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3894 PyObject_GC_UnTrack(lz);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3895 Py_XDECREF(lz->ittuple);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3896 Py_XDECREF(lz->result);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3897 Py_XDECREF(lz->fillvalue);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3898 Py_TYPE(lz)->tp_free(lz);
40877
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3899 }
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3900
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3901 static int
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3902 izip_longest_traverse(iziplongestobject *lz, visitproc visit, void *arg)
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3903 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3904 Py_VISIT(lz->ittuple);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3905 Py_VISIT(lz->result);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3906 Py_VISIT(lz->fillvalue);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3907 return 0;
40877
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3908 }
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3909
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3910 static PyObject *
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3911 izip_longest_next(iziplongestobject *lz)
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3912 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3913 Py_ssize_t i;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3914 Py_ssize_t tuplesize = lz->tuplesize;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3915 PyObject *result = lz->result;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3916 PyObject *it;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3917 PyObject *item;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3918 PyObject *olditem;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3919
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3920 if (tuplesize == 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3921 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3922 if (lz->numactive == 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3923 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3924 if (Py_REFCNT(result) == 1) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3925 Py_INCREF(result);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3926 for (i=0 ; i < tuplesize ; i++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3927 it = PyTuple_GET_ITEM(lz->ittuple, i);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3928 if (it == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3929 Py_INCREF(lz->fillvalue);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3930 item = lz->fillvalue;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3931 } else {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3932 item = PyIter_Next(it);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3933 if (item == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3934 lz->numactive -= 1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3935 if (lz->numactive == 0 || PyErr_Occurred()) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3936 lz->numactive = 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3937 Py_DECREF(result);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3938 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3939 } else {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3940 Py_INCREF(lz->fillvalue);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3941 item = lz->fillvalue;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3942 PyTuple_SET_ITEM(lz->ittuple, i, NULL);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3943 Py_DECREF(it);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3944 }
57033
ed166ff7d952 Issue 7244: Fix indentation in C code. Fix test to not sent output to stdout.
Raymond Hettinger <python@rcn.com>
parents: 57022
diff changeset
3945 }
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3946 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3947 olditem = PyTuple_GET_ITEM(result, i);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3948 PyTuple_SET_ITEM(result, i, item);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3949 Py_DECREF(olditem);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3950 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3951 } else {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3952 result = PyTuple_New(tuplesize);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3953 if (result == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3954 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3955 for (i=0 ; i < tuplesize ; i++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3956 it = PyTuple_GET_ITEM(lz->ittuple, i);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3957 if (it == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3958 Py_INCREF(lz->fillvalue);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3959 item = lz->fillvalue;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3960 } else {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3961 item = PyIter_Next(it);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3962 if (item == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3963 lz->numactive -= 1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3964 if (lz->numactive == 0 || PyErr_Occurred()) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3965 lz->numactive = 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3966 Py_DECREF(result);
57033
ed166ff7d952 Issue 7244: Fix indentation in C code. Fix test to not sent output to stdout.
Raymond Hettinger <python@rcn.com>
parents: 57022
diff changeset
3967 return NULL;
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3968 } else {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3969 Py_INCREF(lz->fillvalue);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3970 item = lz->fillvalue;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3971 PyTuple_SET_ITEM(lz->ittuple, i, NULL);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3972 Py_DECREF(it);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3973 }
57033
ed166ff7d952 Issue 7244: Fix indentation in C code. Fix test to not sent output to stdout.
Raymond Hettinger <python@rcn.com>
parents: 57022
diff changeset
3974 }
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3975 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3976 PyTuple_SET_ITEM(result, i, item);
57036
da6ad98d5dae Fix space/tabs issue.
Raymond Hettinger <python@rcn.com>
parents: 57033
diff changeset
3977 }
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3978 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3979 return result;
40877
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3980 }
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3981
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3982 PyDoc_STRVAR(izip_longest_doc,
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3983 "izip_longest(iter1 [,iter2 [...]], [fillvalue=None]) --> izip_longest object\n\
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3984 \n\
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3985 Return an izip_longest object whose .next() method returns a tuple where\n\
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3986 the i-th element comes from the i-th iterable argument. The .next()\n\
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3987 method continues until the longest iterable in the argument sequence\n\
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3988 is exhausted and then it raises StopIteration. When the shorter iterables\n\
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3989 are exhausted, the fillvalue is substituted in their place. The fillvalue\n\
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3990 defaults to None or can be specified by a keyword argument.\n\
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3991 ");
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3992
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
3993 static PyTypeObject iziplongest_type = {
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3994 PyVarObject_HEAD_INIT(NULL, 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3995 "itertools.izip_longest", /* tp_name */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3996 sizeof(iziplongestobject), /* tp_basicsize */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3997 0, /* tp_itemsize */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3998 /* methods */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
3999 (destructor)izip_longest_dealloc, /* tp_dealloc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4000 0, /* tp_print */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4001 0, /* tp_getattr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4002 0, /* tp_setattr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4003 0, /* tp_compare */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4004 0, /* tp_repr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4005 0, /* tp_as_number */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4006 0, /* tp_as_sequence */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4007 0, /* tp_as_mapping */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4008 0, /* tp_hash */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4009 0, /* tp_call */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4010 0, /* tp_str */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4011 PyObject_GenericGetAttr, /* tp_getattro */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4012 0, /* tp_setattro */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4013 0, /* tp_as_buffer */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4014 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4015 Py_TPFLAGS_BASETYPE, /* tp_flags */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4016 izip_longest_doc, /* tp_doc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4017 (traverseproc)izip_longest_traverse, /* tp_traverse */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4018 0, /* tp_clear */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4019 0, /* tp_richcompare */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4020 0, /* tp_weaklistoffset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4021 PyObject_SelfIter, /* tp_iter */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4022 (iternextfunc)izip_longest_next, /* tp_iternext */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4023 0, /* tp_methods */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4024 0, /* tp_members */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4025 0, /* tp_getset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4026 0, /* tp_base */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4027 0, /* tp_dict */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4028 0, /* tp_descr_get */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4029 0, /* tp_descr_set */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4030 0, /* tp_dictoffset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4031 0, /* tp_init */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4032 0, /* tp_alloc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4033 izip_longest_new, /* tp_new */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4034 PyObject_GC_Del, /* tp_free */
40877
6fa0d682e1e5 Add itertools.izip_longest().
Raymond Hettinger <python@rcn.com>
parents: 40766
diff changeset
4035 };
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
4036
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
4037 /* module level code ********************************************************/
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
4038
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
4039 PyDoc_STRVAR(module_doc,
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
4040 "Functional tools for creating and using iterators.\n\
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
4041 \n\
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
4042 Infinite iterators:\n\
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
4043 count([n]) --> n, n+1, n+2, ...\n\
28024
61fa6b55c1de User requested changes to the itertools module.
Raymond Hettinger <python@rcn.com>
parents: 27770
diff changeset
4044 cycle(p) --> p0, p1, ... plast, p0, p1, ...\n\
28601
58db5fbd9c28 Fix docstring typo
Andrew M. Kuchling <amk@amk.ca>
parents: 28320
diff changeset
4045 repeat(elem [,n]) --> elem, elem, elem, ... endlessly or up to n times\n\
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
4046 \n\
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
4047 Iterators terminating on the shortest input sequence:\n\
51162
07ff281be02c Update itertools.__doc__ to include all tools.
Raymond Hettinger <python@rcn.com>
parents: 51097
diff changeset
4048 chain(p, q, ...) --> p0, p1, ... plast, q0, q1, ... \n\
51164
7cb351c9cf40 Fix typo.
Raymond Hettinger <python@rcn.com>
parents: 51162
diff changeset
4049 compress(data, selectors) --> (d[0] if s[0]), (d[1] if s[1]), ...\n\
51162
07ff281be02c Update itertools.__doc__ to include all tools.
Raymond Hettinger <python@rcn.com>
parents: 51097
diff changeset
4050 dropwhile(pred, seq) --> seq[n], seq[n+1], starting when pred fails\n\
07ff281be02c Update itertools.__doc__ to include all tools.
Raymond Hettinger <python@rcn.com>
parents: 51097
diff changeset
4051 groupby(iterable[, keyfunc]) --> sub-iterators grouped by value of keyfunc(v)\n\
27769
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
4052 ifilter(pred, seq) --> elements of seq where pred(elem) is True\n\
dc5e1d918055 C Code:
Raymond Hettinger <python@rcn.com>
parents: 27748
diff changeset
4053 ifilterfalse(pred, seq) --> elements of seq where pred(elem) is False\n\
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
4054 islice(seq, [start,] stop [, step]) --> elements from\n\
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
4055 seq[start:stop:step]\n\
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
4056 imap(fun, p, q, ...) --> fun(p0, q0), fun(p1, q1), ...\n\
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
4057 starmap(fun, seq) --> fun(*seq[0]), fun(*seq[1]), ...\n\
30900
3096fab2a19c Improve the implementation of itertools.tee().
Raymond Hettinger <python@rcn.com>
parents: 30800
diff changeset
4058 tee(it, n=2) --> (it1, it2 , ... itn) splits one iterator into n\n\
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
4059 takewhile(pred, seq) --> seq[0], seq[1], until pred fails\n\
51162
07ff281be02c Update itertools.__doc__ to include all tools.
Raymond Hettinger <python@rcn.com>
parents: 51097
diff changeset
4060 izip(p, q, ...) --> (p[0], q[0]), (p[1], q[1]), ... \n\
07ff281be02c Update itertools.__doc__ to include all tools.
Raymond Hettinger <python@rcn.com>
parents: 51097
diff changeset
4061 izip_longest(p, q, ...) --> (p[0], q[0]), (p[1], q[1]), ... \n\
57345
f73d137cfbd0 Fix docstrings for itertools combinatoric functions.
Raymond Hettinger <python@rcn.com>
parents: 57036
diff changeset
4062 \n\
f73d137cfbd0 Fix docstrings for itertools combinatoric functions.
Raymond Hettinger <python@rcn.com>
parents: 57036
diff changeset
4063 Combinatoric generators:\n\
f73d137cfbd0 Fix docstrings for itertools combinatoric functions.
Raymond Hettinger <python@rcn.com>
parents: 57036
diff changeset
4064 product(p, q, ... [repeat=1]) --> cartesian product\n\
f73d137cfbd0 Fix docstrings for itertools combinatoric functions.
Raymond Hettinger <python@rcn.com>
parents: 57036
diff changeset
4065 permutations(p[, r])\n\
f73d137cfbd0 Fix docstrings for itertools combinatoric functions.
Raymond Hettinger <python@rcn.com>
parents: 57036
diff changeset
4066 combinations(p, r)\n\
57343
f152667200ae Fix docstrings for itertools combinatoric functions.
Raymond Hettinger <python@rcn.com>
parents: 57040
diff changeset
4067 combinations_with_replacement(p, r)\n\
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
4068 ");
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
4069
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
4070
30900
3096fab2a19c Improve the implementation of itertools.tee().
Raymond Hettinger <python@rcn.com>
parents: 30800
diff changeset
4071 static PyMethodDef module_methods[] = {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4072 {"tee", (PyCFunction)tee, METH_VARARGS, tee_doc},
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4073 {NULL, NULL} /* sentinel */
30900
3096fab2a19c Improve the implementation of itertools.tee().
Raymond Hettinger <python@rcn.com>
parents: 30800
diff changeset
4074 };
3096fab2a19c Improve the implementation of itertools.tee().
Raymond Hettinger <python@rcn.com>
parents: 30800
diff changeset
4075
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
4076 PyMODINIT_FUNC
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
4077 inititertools(void)
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
parents:
diff changeset
4078 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4079 int i;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4080 PyObject *m;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4081 char *name;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4082 PyTypeObject *typelist[] = {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4083 &combinations_type,
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
4084 &cwr_type,
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4085 &cycle_type,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4086 &dropwhile_type,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4087 &takewhile_type,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4088 &islice_type,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4089 &starmap_type,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4090 &imap_type,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4091 &chain_type,
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 57519
diff changeset
4092 &compress_type,
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4093 &ifilter_type,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4094 &ifilterfalse_type,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4095 &count_type,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4096 &izip_type,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4097 &iziplongest_type,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4098 &permutations_type,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4099 &product_type,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4100 &repeat_type,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4101 &groupby_type,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4102 NULL
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4103 };
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4104
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4105 Py_TYPE(&teedataobject_type) = &PyType_Type;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4106 m = Py_InitModule3("itertools", module_methods, module_doc);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4107 if (m == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4108 return;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4109
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4110 for (i=0 ; typelist[i] != NULL ; i++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4111 if (PyType_Ready(typelist[i]) < 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4112 return;
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Antoine Pitrou <solipsis@pitrou.net>
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4113 name = strchr(typelist[i]->tp_name, '.');
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parents: 57521
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4114 assert (name != NULL);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
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4115 Py_INCREF(typelist[i]);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
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4116 PyModule_AddObject(m, name+1, (PyObject *)typelist[i]);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
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4117 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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4118
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4119 if (PyType_Ready(&teedataobject_type) < 0)
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diff changeset
4120 return;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
diff changeset
4121 if (PyType_Ready(&tee_type) < 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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diff changeset
4122 return;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 57521
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4123 if (PyType_Ready(&_grouper_type) < 0)
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diff changeset
4124 return;
27570
ba57c3daf6e9 Move itertools module from the sandbox and into production.
Raymond Hettinger <python@rcn.com>
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4125 }