Mercurial > cpython-lru_cache-weakref

annotate Objects/structseq.c @ 24042:63fbbed10714 legacy-trunk

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Simplify HTTPSConnection constructor. See discussion in SF bug 458463.
author Jeremy Hylton <jeremy@alum.mit.edu>
date Fri, 28 Jun 2002 23:38:14 +0000
parents 363c7fc174ac
children 0bbea4dcd9be
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /* Implementation helper: a struct that looks like a tuple. See timemodule
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2 and posixmodule for example uses. */
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3
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4 #include "Python.h"
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5 #include "structmember.h"
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6 #include "structseq.h"
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7
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8 static char visible_length_key[] = "n_sequence_fields";
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9 static char real_length_key[] = "n_fields";
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10
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11 #define VISIBLE_SIZE(op) ((op)->ob_size)
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12 #define VISIBLE_SIZE_TP(tp) PyInt_AsLong( \
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13 PyDict_GetItemString((tp)->tp_dict, visible_length_key))
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14
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15 #define REAL_SIZE_TP(tp) PyInt_AsLong( \
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16 PyDict_GetItemString((tp)->tp_dict, real_length_key))
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17 #define REAL_SIZE(op) REAL_SIZE_TP((op)->ob_type)
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18
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19
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20 PyObject *
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21 PyStructSequence_New(PyTypeObject *type)
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22 {
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23 PyStructSequence *obj;
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24
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25 obj = PyObject_New(PyStructSequence, type);
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26 obj->ob_size = VISIBLE_SIZE_TP(type);
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27
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28 return (PyObject*) obj;
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29 }
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30
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31 static void
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32 structseq_dealloc(PyStructSequence *obj)
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33 {
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34 int i, size;
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35
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36 size = REAL_SIZE(obj);
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37 for (i = 0; i < size; ++i) {
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38 Py_XDECREF(obj->ob_item[i]);
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39 }
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40 PyObject_Del(obj);
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41 }
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42
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43 static int
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44 structseq_length(PyStructSequence *obj)
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45 {
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46 return VISIBLE_SIZE(obj);
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47 }
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48
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49 static PyObject*
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50 structseq_item(PyStructSequence *obj, int i)
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51 {
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52 if (i < 0 || i >= VISIBLE_SIZE(obj)) {
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53 PyErr_SetString(PyExc_IndexError, "tuple index out of range");
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54 return NULL;
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55 }
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56 Py_INCREF(obj->ob_item[i]);
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57 return obj->ob_item[i];
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58 }
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59
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60 static PyObject*
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61 structseq_slice(PyStructSequence *obj, int low, int high)
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62 {
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63 PyTupleObject *np;
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64 int i;
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65
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66 if (low < 0)
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67 low = 0;
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68 if (high > VISIBLE_SIZE(obj))
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69 high = VISIBLE_SIZE(obj);
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70 if (high < low)
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71 high = low;
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72 np = (PyTupleObject *)PyTuple_New(high-low);
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73 if (np == NULL)
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74 return NULL;
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75 for(i = low; i < high; ++i) {
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76 PyObject *v = obj->ob_item[i];
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77 Py_INCREF(v);
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78 PyTuple_SET_ITEM(np, i-low, v);
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79 }
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80 return (PyObject *) np;
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81 }
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82
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83 static PyObject *
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84 structseq_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
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85 {
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86 PyObject *arg = NULL;
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87 PyObject *dict = NULL;
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88 PyObject *ob;
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89 PyStructSequence *res = NULL;
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90 int len, min_len, max_len, i;
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91 static char *kwlist[] = {"sequence", "dict", 0};
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92
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93 if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|O:structseq",
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94 kwlist, &arg, &dict))
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95 return NULL;
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96
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97 arg = PySequence_Fast(arg, "constructor requires a sequence");
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98
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99 if (!arg) {
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100 return NULL;
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101 }
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102
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103 if (dict && !PyDict_Check(dict)) {
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104 PyErr_Format(PyExc_TypeError,
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105 "%.500s() takes a dict as second arg, if any",
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106 type->tp_name);
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107 Py_DECREF(arg);
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108 return NULL;
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109 }
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110
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111 len = PySequence_Fast_GET_SIZE(arg);
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112 min_len = VISIBLE_SIZE_TP(type);
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113 max_len = REAL_SIZE_TP(type);
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114
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115 if (min_len != max_len) {
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116 if (len < min_len) {
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117 PyErr_Format(PyExc_TypeError,
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118 "%.500s() takes an at least %d-sequence (%d-sequence given)",
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119 type->tp_name, min_len, len);
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120 Py_DECREF(arg);
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121 return NULL;
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122 }
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123
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124 if (len > max_len) {
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125 PyErr_Format(PyExc_TypeError,
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126 "%.500s() takes an at most %d-sequence (%d-sequence given)",
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127 type->tp_name, max_len, len);
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128 Py_DECREF(arg);
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129 return NULL;
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130 }
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131 }
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132 else {
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133 if (len != min_len) {
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134 PyErr_Format(PyExc_TypeError,
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135 "%.500s() takes a %d-sequence (%d-sequence given)",
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136 type->tp_name, min_len, len);
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137 Py_DECREF(arg);
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138 return NULL;
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139 }
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140 }
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141
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142 res = (PyStructSequence*) PyStructSequence_New(type);
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143 for (i = 0; i < len; ++i) {
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144 PyObject *v = PySequence_Fast_GET_ITEM(arg, i);
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145 Py_INCREF(v);
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146 res->ob_item[i] = v;
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147 }
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148 for (; i < max_len; ++i) {
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149 if (dict && (ob = PyDict_GetItemString(
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150 dict, type->tp_members[i].name))) {
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151 }
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152 else {
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153 ob = Py_None;
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154 }
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155 Py_INCREF(ob);
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156 res->ob_item[i] = ob;
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157 }
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158
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159 Py_DECREF(arg);
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160 return (PyObject*) res;
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161 }
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162
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163 static PyObject *
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164 make_tuple(PyStructSequence *obj)
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165 {
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166 return structseq_slice(obj, 0, VISIBLE_SIZE(obj));
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167 }
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168
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169 static PyObject *
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170 structseq_repr(PyStructSequence *obj)
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171 {
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172 PyObject *tup, *str;
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173 tup = make_tuple(obj);
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174 str = PyObject_Repr(tup);
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175 Py_DECREF(tup);
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176 return str;
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177 }
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178
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179 static PyObject *
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180 structseq_concat(PyStructSequence *obj, PyObject *b)
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181 {
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182 PyObject *tup, *result;
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183 tup = make_tuple(obj);
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184 result = PySequence_Concat(tup, b);
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185 Py_DECREF(tup);
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186 return result;
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187 }
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188
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189 static PyObject *
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190 structseq_repeat(PyStructSequence *obj, int n)
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191 {
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192 PyObject *tup, *result;
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193 tup = make_tuple(obj);
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194 result = PySequence_Repeat(tup, n);
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195 Py_DECREF(tup);
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196 return result;
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197 }
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198
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199 static int
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200 structseq_contains(PyStructSequence *obj, PyObject *o)
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201 {
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202 PyObject *tup;
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203 int result;
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204 tup = make_tuple(obj);
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205 result = PySequence_Contains(tup, o);
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206 Py_DECREF(tup);
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207 return result;
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208 }
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209
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210 static long
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211 structseq_hash(PyObject *obj)
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212 {
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213 PyObject *tup;
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214 long result;
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215 tup = make_tuple((PyStructSequence*) obj);
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216 result = PyObject_Hash(tup);
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217 Py_DECREF(tup);
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218 return result;
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219 }
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220
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221 static PyObject *
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222 structseq_richcompare(PyObject *obj, PyObject *o2, int op)
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223 {
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224 PyObject *tup, *result;
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225 tup = make_tuple((PyStructSequence*) obj);
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226 result = PyObject_RichCompare(tup, o2, op);
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227 Py_DECREF(tup);
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228 return result;
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diff changeset
229 }
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230
22137
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231 static PyObject *
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232 structseq_reduce(PyStructSequence* self)
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233 {
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234 PyObject* tup;
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235 PyObject* dict;
22168
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236 PyObject* result;
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diff changeset
237 long n_fields, n_visible_fields;
22137
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238 int i;
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239
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240 n_fields = REAL_SIZE(self);
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241 n_visible_fields = VISIBLE_SIZE(self);
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242 tup = PyTuple_New(n_visible_fields);
22137
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243 if (!tup) {
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244 return NULL;
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245 }
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246
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247 dict = PyDict_New();
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248 if (!dict) {
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249 Py_DECREF(tup);
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250 return NULL;
837951ecdce9 After some thinking, I decided to move all of this across onto
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diff changeset
251 }
837951ecdce9 After some thinking, I decided to move all of this across onto
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diff changeset
252
837951ecdce9 After some thinking, I decided to move all of this across onto
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253 for (i = 0; i < n_visible_fields; i++) {
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254 Py_INCREF(self->ob_item[i]);
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255 PyTuple_SET_ITEM(tup, i, self->ob_item[i]);
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256 }
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257
22166
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258 for (; i < n_fields; i++) {
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259 PyDict_SetItemString(dict, self->ob_type->tp_members[i].name,
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260 self->ob_item[i]);
837951ecdce9 After some thinking, I decided to move all of this across onto
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261 }
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262
22168
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263 result = Py_BuildValue("(O(OO))", self->ob_type, tup, dict);
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264
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265 Py_DECREF(tup);
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266 Py_DECREF(dict);
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267
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268 return result;
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269 }
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270
20540
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271 static PySequenceMethods structseq_as_sequence = {
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272 (inquiry)structseq_length,
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273 (binaryfunc)structseq_concat, /* sq_concat */
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diff changeset
274 (intargfunc)structseq_repeat, /* sq_repeat */
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diff changeset
275 (intargfunc)structseq_item, /* sq_item */
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276 (intintargfunc)structseq_slice, /* sq_slice */
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277 0, /* sq_ass_item */
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278 0, /* sq_ass_slice */
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279 (objobjproc)structseq_contains, /* sq_contains */
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280 };
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281
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282 static PyMethodDef structseq_methods[] = {
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283 {"__reduce__", (PyCFunction)structseq_reduce,
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284 METH_NOARGS, NULL},
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285 {NULL, NULL}
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286 };
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287
20540
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288 static PyTypeObject _struct_sequence_template = {
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289 PyObject_HEAD_INIT(&PyType_Type)
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290 0, /* ob_size */
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291 NULL, /* tp_name */
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292 0, /* tp_basicsize */
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293 0, /* tp_itemsize */
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294 (destructor)structseq_dealloc, /* tp_dealloc */
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295 0, /* tp_print */
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296 0, /* tp_getattr */
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297 0, /* tp_setattr */
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298 0, /* tp_compare */
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299 (reprfunc)structseq_repr, /* tp_repr */
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300 0, /* tp_as_number */
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301 &structseq_as_sequence, /* tp_as_sequence */
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302 0, /* tp_as_mapping */
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303 (hashfunc)structseq_hash, /* tp_hash */
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304 0, /* tp_call */
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305 0, /* tp_str */
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306 0, /* tp_getattro */
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307 0, /* tp_setattro */
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308 0, /* tp_as_buffer */
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309 Py_TPFLAGS_DEFAULT, /* tp_flags */
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310 NULL, /* tp_doc */
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311 0, /* tp_traverse */
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312 0, /* tp_clear */
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313 structseq_richcompare, /* tp_richcompare */
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314 0, /* tp_weaklistoffset */
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315 0, /* tp_iter */
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316 0, /* tp_iternext */
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317 structseq_methods, /* tp_methods */
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318 NULL, /* tp_members */
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319 0, /* tp_getset */
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320 0, /* tp_base */
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321 0, /* tp_dict */
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322 0, /* tp_descr_get */
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323 0, /* tp_descr_set */
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324 0, /* tp_dictoffset */
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325 0, /* tp_init */
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326 0, /* tp_alloc */
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327 structseq_new, /* tp_new */
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328 };
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329
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330 void
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331 PyStructSequence_InitType(PyTypeObject *type, PyStructSequence_Desc *desc)
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332 {
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333 PyObject *dict;
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334 PyMemberDef* members;
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335 int n_members, i;
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336
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337 for (i = 0; desc->fields[i].name != NULL; ++i)
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338 ;
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339 n_members = i;
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340
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341 memcpy(type, &_struct_sequence_template, sizeof(PyTypeObject));
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342 type->tp_name = desc->name;
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343 type->tp_doc = desc->doc;
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344 type->tp_basicsize = sizeof(PyStructSequence)+
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345 sizeof(PyObject*)*(n_members-1);
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346 type->tp_itemsize = 0;
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347
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348 members = PyMem_NEW(PyMemberDef, n_members+1);
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349
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350 for (i = 0; i < n_members; ++i) {
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351 members[i].name = desc->fields[i].name;
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352 members[i].type = T_OBJECT;
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353 members[i].offset = offsetof(PyStructSequence, ob_item)
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354 + i * sizeof(PyObject*);
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355 members[i].flags = READONLY;
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356 members[i].doc = desc->fields[i].doc;
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357 }
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358 members[n_members].name = NULL;
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359
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360 type->tp_members = members;
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361
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362 if (PyType_Ready(type) < 0)
ad2662095d77 Missing file structseq.c for SF patch #462296
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363 return;
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364 Py_INCREF(type);
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365
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366 dict = type->tp_dict;
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367 PyDict_SetItemString(dict, visible_length_key,
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368 PyInt_FromLong((long) desc->n_in_sequence));
ad2662095d77 Missing file structseq.c for SF patch #462296
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369 PyDict_SetItemString(dict, real_length_key,
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370 PyInt_FromLong((long) n_members));
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371 PyDict_SetItemString(dict, "__safe_for_unpickling__",
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372 PyInt_FromLong(1));
20540
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373 }