Mercurial > cpython-lru_cache-weakref

annotate Objects/funcobject.c @ 15946:4f621708514b legacy-trunk

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Rich comparisons fall-out: - Get rid of long_cmp(). - Renamed Py_TPFLAGS_NEWSTYLENUMBER to Py_TPFLAGS_CHECKTYPES.
author Guido van Rossum <guido@python.org>
date Wed, 17 Jan 2001 15:33:18 +0000
parents 1c6b0d3a58ea
children 78bd97d8413c
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145
853b736a6a9e Added copyright notice.
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1
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2 /* Function object implementation */
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3
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4 #include "Python.h"
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5 #include "compile.h"
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6 #include "structmember.h"
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7
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8 PyObject *
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9 PyFunction_New(PyObject *code, PyObject *globals)
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10 {
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11 PyFunctionObject *op = PyObject_NEW(PyFunctionObject,
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12 &PyFunction_Type);
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13 if (op != NULL) {
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14 PyObject *doc;
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15 PyObject *consts;
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16 Py_INCREF(code);
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17 op->func_code = code;
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18 Py_INCREF(globals);
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19 op->func_globals = globals;
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20 op->func_name = ((PyCodeObject *)code)->co_name;
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21 Py_INCREF(op->func_name);
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22 op->func_defaults = NULL; /* No default arguments */
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23 consts = ((PyCodeObject *)code)->co_consts;
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24 if (PyTuple_Size(consts) >= 1) {
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25 doc = PyTuple_GetItem(consts, 0);
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26 if (!PyString_Check(doc) && !PyUnicode_Check(doc))
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27 doc = Py_None;
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28 }
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29 else
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30 doc = Py_None;
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31 Py_INCREF(doc);
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32 op->func_doc = doc;
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33 op->func_dict = NULL;
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34 }
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35 else
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36 return NULL;
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37 PyObject_GC_Init(op);
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38 return (PyObject *)op;
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39 }
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40
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41 PyObject *
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42 PyFunction_GetCode(PyObject *op)
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43 {
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44 if (!PyFunction_Check(op)) {
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45 PyErr_BadInternalCall();
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46 return NULL;
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47 }
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48 return ((PyFunctionObject *) op) -> func_code;
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49 }
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50
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51 PyObject *
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52 PyFunction_GetGlobals(PyObject *op)
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53 {
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54 if (!PyFunction_Check(op)) {
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55 PyErr_BadInternalCall();
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56 return NULL;
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57 }
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58 return ((PyFunctionObject *) op) -> func_globals;
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59 }
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60
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61 PyObject *
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62 PyFunction_GetDefaults(PyObject *op)
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63 {
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64 if (!PyFunction_Check(op)) {
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65 PyErr_BadInternalCall();
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66 return NULL;
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67 }
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68 return ((PyFunctionObject *) op) -> func_defaults;
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69 }
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70
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71 int
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72 PyFunction_SetDefaults(PyObject *op, PyObject *defaults)
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73 {
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74 if (!PyFunction_Check(op)) {
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75 PyErr_BadInternalCall();
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76 return -1;
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77 }
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78 if (defaults == Py_None)
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79 defaults = NULL;
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80 else if (PyTuple_Check(defaults)) {
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81 Py_XINCREF(defaults);
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82 }
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83 else {
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84 PyErr_SetString(PyExc_SystemError, "non-tuple default args");
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85 return -1;
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86 }
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87 Py_XDECREF(((PyFunctionObject *) op) -> func_defaults);
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88 ((PyFunctionObject *) op) -> func_defaults = defaults;
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89 return 0;
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90 }
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91
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92 /* Methods */
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93
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94 #define OFF(x) offsetof(PyFunctionObject, x)
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95
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96 static struct memberlist func_memberlist[] = {
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97 {"func_code", T_OBJECT, OFF(func_code)},
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98 {"func_globals",T_OBJECT, OFF(func_globals), READONLY},
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99 {"func_name", T_OBJECT, OFF(func_name), READONLY},
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100 {"__name__", T_OBJECT, OFF(func_name), READONLY},
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101 {"func_defaults",T_OBJECT, OFF(func_defaults)},
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102 {"func_doc", T_OBJECT, OFF(func_doc)},
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103 {"__doc__", T_OBJECT, OFF(func_doc)},
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104 {NULL} /* Sentinel */
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105 };
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106
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107 static PyObject *
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108 func_getattro(PyFunctionObject *op, PyObject *name)
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109 {
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110 PyObject *rtn;
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111 char *sname = PyString_AsString(name);
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112
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113 if (sname[0] != '_' && PyEval_GetRestricted()) {
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114 PyErr_SetString(PyExc_RuntimeError,
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115 "function attributes not accessible in restricted mode");
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116 return NULL;
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117 }
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118
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119 if (!strcmp(sname, "__dict__") || !strcmp(sname, "func_dict")) {
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120 if (op->func_dict == NULL)
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121 rtn = Py_None;
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122 else
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123 rtn = op->func_dict;
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124
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125 Py_INCREF(rtn);
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126 return rtn;
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127 }
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128
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129 /* no API for PyMember_HasAttr() */
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130 rtn = PyMember_Get((char *)op, func_memberlist, sname);
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131
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132 if (rtn == NULL && PyErr_ExceptionMatches(PyExc_AttributeError)) {
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133 PyErr_Clear();
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134 if (op->func_dict != NULL) {
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135 rtn = PyDict_GetItem(op->func_dict, name);
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136 Py_XINCREF(rtn);
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137 }
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138 if (rtn == NULL)
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139 PyErr_SetObject(PyExc_AttributeError, name);
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140 }
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141 return rtn;
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142 }
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143
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144 static int
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145 func_setattro(PyFunctionObject *op, PyObject *name, PyObject *value)
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146 {
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147 int rtn;
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148 char *sname = PyString_AsString(name);
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149
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150 if (PyEval_GetRestricted()) {
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151 PyErr_SetString(PyExc_RuntimeError,
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152 "function attributes not settable in restricted mode");
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153 return -1;
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154 }
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155 if (strcmp(sname, "func_code") == 0) {
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156 if (value == NULL || !PyCode_Check(value)) {
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157 PyErr_SetString(
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158 PyExc_TypeError,
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159 "func_code must be set to a code object");
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160 return -1;
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161 }
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162 }
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163 else if (strcmp(sname, "func_defaults") == 0) {
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164 if (value != Py_None && !PyTuple_Check(value)) {
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165 PyErr_SetString(
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166 PyExc_TypeError,
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167 "func_defaults must be set to a tuple object");
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168 return -1;
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169 }
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170 if (value == Py_None)
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171 value = NULL;
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172 }
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173 else if (!strcmp(sname, "func_dict") || !strcmp(sname, "__dict__")) {
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174 if (value != Py_None && !PyDict_Check(value)) {
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175 PyErr_SetString(
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176 PyExc_TypeError,
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diff changeset
177 "func_dict must be set to a dict object");
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178 return -1;
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179 }
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180 if (value == Py_None)
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181 value = NULL;
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182
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183 Py_XDECREF(op->func_dict);
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184 Py_XINCREF(value);
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185 op->func_dict = value;
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186 return 0;
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187 }
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188
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189 rtn = PyMember_Set((char *)op, func_memberlist, sname, value);
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190 if (rtn < 0 && PyErr_ExceptionMatches(PyExc_AttributeError)) {
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191 PyErr_Clear();
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diff changeset
192 if (op->func_dict == NULL) {
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193 op->func_dict = PyDict_New();
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194 if (op->func_dict == NULL)
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195 return -1;
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196 }
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diff changeset
197 rtn = PyDict_SetItem(op->func_dict, name, value);
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diff changeset
198 }
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199 return rtn;
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200 }
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201
6
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202 static void
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203 func_dealloc(PyFunctionObject *op)
6
fc6fcd7df4f7 Initial revision
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parents:
diff changeset
204 {
13183
54bffdddc0ef final patches from Neil Schemenauer for garbage collection
Jeremy Hylton <jeremy@alum.mit.edu>
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diff changeset
205 PyObject_GC_Fini(op);
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206 Py_DECREF(op->func_code);
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207 Py_DECREF(op->func_globals);
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208 Py_DECREF(op->func_name);
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209 Py_XDECREF(op->func_defaults);
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diff changeset
210 Py_XDECREF(op->func_doc);
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diff changeset
211 Py_XDECREF(op->func_dict);
13265
e8bb0d536633 Neil Schemenauer: small fixes for GC
Guido van Rossum <guido@python.org>
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diff changeset
212 op = (PyFunctionObject *) PyObject_AS_GC(op);
12576
1c7c2dd1beb1 Vladimir Marangozov's long-awaited malloc restructuring.
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diff changeset
213 PyObject_DEL(op);
6
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214 }
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215
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216 static PyObject*
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diff changeset
217 func_repr(PyFunctionObject *op)
1257
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diff changeset
218 {
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diff changeset
219 char buf[140];
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220 if (op->func_name == Py_None)
13210
ff243b0f16ee Trent Mick <trentm@activestate.com>:
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diff changeset
221 sprintf(buf, "<anonymous function at %p>", op);
1415
06570429f062 * import.c (get_module): pass .py filename to parse_file, not .pyc filename!
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parents: 1399
diff changeset
222 else
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diff changeset
223 sprintf(buf, "<function %.100s at %p>",
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diff changeset
224 PyString_AsString(op->func_name),
13210
ff243b0f16ee Trent Mick <trentm@activestate.com>:
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parents: 13183
diff changeset
225 op);
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226 return PyString_FromString(buf);
1257
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diff changeset
227 }
1cabc2b6c970 * Changed all copyright messages to include 1993.
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diff changeset
228
1399
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diff changeset
229 static int
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diff changeset
230 func_compare(PyFunctionObject *f, PyFunctionObject *g)
1399
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diff changeset
231 {
1848
b724599401ff Merge back to main trunk
Guido van Rossum <guido@python.org>
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diff changeset
232 int c;
1399
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diff changeset
233 if (f->func_globals != g->func_globals)
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diff changeset
234 return (f->func_globals < g->func_globals) ? -1 : 1;
5945
75b3aabcb7c1 Fix bug in comparing function objects detected by Sjoerd:
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parents: 5396
diff changeset
235 if (f->func_defaults != g->func_defaults) {
75b3aabcb7c1 Fix bug in comparing function objects detected by Sjoerd:
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diff changeset
236 if (f->func_defaults == NULL)
75b3aabcb7c1 Fix bug in comparing function objects detected by Sjoerd:
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diff changeset
237 return -1;
75b3aabcb7c1 Fix bug in comparing function objects detected by Sjoerd:
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diff changeset
238 if (g->func_defaults == NULL)
75b3aabcb7c1 Fix bug in comparing function objects detected by Sjoerd:
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diff changeset
239 return 1;
75b3aabcb7c1 Fix bug in comparing function objects detected by Sjoerd:
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diff changeset
240 c = PyObject_Compare(f->func_defaults, g->func_defaults);
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diff changeset
241 if (c != 0)
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diff changeset
242 return c;
75b3aabcb7c1 Fix bug in comparing function objects detected by Sjoerd:
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diff changeset
243 }
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244 return PyObject_Compare(f->func_code, g->func_code);
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245 }
cc172ce05561 Added compare operations for functions and code objects.
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diff changeset
246
cc172ce05561 Added compare operations for functions and code objects.
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diff changeset
247 static long
13457
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diff changeset
248 func_hash(PyFunctionObject *f)
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diff changeset
249 {
13141
cca84745da3e This patch addresses two main issues: (1) There exist some non-fatal
Fred Drake <fdrake@acm.org>
parents: 12993
diff changeset
250 long h,x;
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diff changeset
251 h = PyObject_Hash(f->func_code);
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diff changeset
252 if (h == -1) return h;
13141
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parents: 12993
diff changeset
253 x = _Py_HashPointer(f->func_globals);
cca84745da3e This patch addresses two main issues: (1) There exist some non-fatal
Fred Drake <fdrake@acm.org>
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diff changeset
254 if (x == -1) return x;
cca84745da3e This patch addresses two main issues: (1) There exist some non-fatal
Fred Drake <fdrake@acm.org>
parents: 12993
diff changeset
255 h ^= x;
1399
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diff changeset
256 if (h == -1) h = -2;
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diff changeset
257 return h;
cc172ce05561 Added compare operations for functions and code objects.
Guido van Rossum <guido@python.org>
parents: 1288
diff changeset
258 }
cc172ce05561 Added compare operations for functions and code objects.
Guido van Rossum <guido@python.org>
parents: 1288
diff changeset
259
12990
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Jeremy Hylton <jeremy@alum.mit.edu>
parents: 12576
diff changeset
260 static int
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diff changeset
261 func_traverse(PyFunctionObject *f, visitproc visit, void *arg)
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parents: 12576
diff changeset
262 {
e615596c5c47 Round 1 of Neil Schemenauer's GC patches:
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parents: 12576
diff changeset
263 int err;
e615596c5c47 Round 1 of Neil Schemenauer's GC patches:
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 12576
diff changeset
264 if (f->func_code) {
e615596c5c47 Round 1 of Neil Schemenauer's GC patches:
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 12576
diff changeset
265 err = visit(f->func_code, arg);
e615596c5c47 Round 1 of Neil Schemenauer's GC patches:
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parents: 12576
diff changeset
266 if (err)
e615596c5c47 Round 1 of Neil Schemenauer's GC patches:
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diff changeset
267 return err;
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Jeremy Hylton <jeremy@alum.mit.edu>
parents: 12576
diff changeset
268 }
e615596c5c47 Round 1 of Neil Schemenauer's GC patches:
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parents: 12576
diff changeset
269 if (f->func_globals) {
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parents: 12576
diff changeset
270 err = visit(f->func_globals, arg);
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parents: 12576
diff changeset
271 if (err)
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parents: 12576
diff changeset
272 return err;
e615596c5c47 Round 1 of Neil Schemenauer's GC patches:
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 12576
diff changeset
273 }
e615596c5c47 Round 1 of Neil Schemenauer's GC patches:
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 12576
diff changeset
274 if (f->func_defaults) {
e615596c5c47 Round 1 of Neil Schemenauer's GC patches:
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 12576
diff changeset
275 err = visit(f->func_defaults, arg);
e615596c5c47 Round 1 of Neil Schemenauer's GC patches:
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parents: 12576
diff changeset
276 if (err)
e615596c5c47 Round 1 of Neil Schemenauer's GC patches:
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diff changeset
277 return err;
e615596c5c47 Round 1 of Neil Schemenauer's GC patches:
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 12576
diff changeset
278 }
e615596c5c47 Round 1 of Neil Schemenauer's GC patches:
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 12576
diff changeset
279 if (f->func_doc) {
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parents: 12576
diff changeset
280 err = visit(f->func_doc, arg);
e615596c5c47 Round 1 of Neil Schemenauer's GC patches:
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281 if (err)
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282 return err;
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283 }
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284 if (f->func_name) {
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285 err = visit(f->func_name, arg);
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286 if (err)
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287 return err;
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288 }
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289 if (f->func_dict) {
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290 err = visit(f->func_dict, arg);
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291 if (err)
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292 return err;
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293 }
12990
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294 return 0;
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295 }
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296
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297 PyTypeObject PyFunction_Type = {
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298 PyObject_HEAD_INIT(&PyType_Type)
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299 0,
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300 "function",
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301 sizeof(PyFunctionObject) + PyGC_HEAD_SIZE,
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302 0,
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303 (destructor)func_dealloc, /*tp_dealloc*/
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304 0, /*tp_print*/
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305 0, /*tp_getattr*/
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306 0, /*tp_setattr*/
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307 (cmpfunc)func_compare, /*tp_compare*/
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308 (reprfunc)func_repr, /*tp_repr*/
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309 0, /*tp_as_number*/
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310 0, /*tp_as_sequence*/
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311 0, /*tp_as_mapping*/
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312 (hashfunc)func_hash, /*tp_hash*/
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313 0, /*tp_call*/
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314 0, /*tp_str*/
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315 (getattrofunc)func_getattro, /*tp_getattro*/
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316 (setattrofunc)func_setattro, /*tp_setattro*/
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317 0, /* tp_as_buffer */
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318 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_GC, /*tp_flags*/
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319 0, /* tp_doc */
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320 (traverseproc)func_traverse, /* tp_traverse */
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321 };