Mercurial > cpython-lru_cache-weakref

annotate Objects/methodobject.c @ 13163:a09e8635534d legacy-trunk

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Don't try to guess the name of a .def file -- if one is supplied, use it, otherwise just generate an '/export:' option.
author Greg Ward <gward@python.net>
date Thu, 29 Jun 2000 23:09:20 +0000
parents cca84745da3e
children ff243b0f16ee
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /***********************************************************
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2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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3 The Netherlands.
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4
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5 All Rights Reserved
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6
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7 Permission to use, copy, modify, and distribute this software and its
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8 documentation for any purpose and without fee is hereby granted,
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9 provided that the above copyright notice appear in all copies and that
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10 both that copyright notice and this permission notice appear in
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11 supporting documentation, and that the names of Stichting Mathematisch
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12 Centrum or CWI or Corporation for National Research Initiatives or
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13 CNRI not be used in advertising or publicity pertaining to
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14 distribution of the software without specific, written prior
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15 permission.
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16
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17 While CWI is the initial source for this software, a modified version
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18 is made available by the Corporation for National Research Initiatives
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19 (CNRI) at the Internet address ftp://ftp.python.org.
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20
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21 STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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22 REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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23 MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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24 CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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25 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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26 PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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27 TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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28 PERFORMANCE OF THIS SOFTWARE.
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29
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30 ******************************************************************/
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31
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32 /* Method object implementation */
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33
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34 #include "Python.h"
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35
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36 #include "token.h"
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37
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38 static PyCFunctionObject *free_list = NULL;
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39
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40 PyObject *
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41 PyCFunction_New(ml, self)
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42 PyMethodDef *ml;
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43 PyObject *self;
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44 {
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45 PyCFunctionObject *op;
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46 op = free_list;
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47 if (op != NULL) {
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48 free_list = (PyCFunctionObject *)(op->m_self);
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49 PyObject_INIT(op, &PyCFunction_Type);
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50 }
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51 else {
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52 op = PyObject_NEW(PyCFunctionObject, &PyCFunction_Type);
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53 if (op == NULL)
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54 return NULL;
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55 }
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56 op->m_ml = ml;
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57 Py_XINCREF(self);
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58 op->m_self = self;
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59 return (PyObject *)op;
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60 }
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61
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62 PyCFunction
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63 PyCFunction_GetFunction(op)
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64 PyObject *op;
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65 {
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66 if (!PyCFunction_Check(op)) {
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67 PyErr_BadInternalCall();
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68 return NULL;
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69 }
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70 return ((PyCFunctionObject *)op) -> m_ml -> ml_meth;
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71 }
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72
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73 PyObject *
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74 PyCFunction_GetSelf(op)
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75 PyObject *op;
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76 {
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77 if (!PyCFunction_Check(op)) {
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78 PyErr_BadInternalCall();
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79 return NULL;
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80 }
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81 return ((PyCFunctionObject *)op) -> m_self;
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82 }
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83
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84 int
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85 PyCFunction_GetFlags(op)
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86 PyObject *op;
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87 {
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88 if (!PyCFunction_Check(op)) {
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89 PyErr_BadInternalCall();
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90 return -1;
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91 }
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92 return ((PyCFunctionObject *)op) -> m_ml -> ml_flags;
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93 }
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94
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95 /* Methods (the standard built-in methods, that is) */
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96
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97 static void
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98 meth_dealloc(m)
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99 PyCFunctionObject *m;
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100 {
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101 Py_XDECREF(m->m_self);
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102 m->m_self = (PyObject *)free_list;
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103 free_list = m;
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104 }
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105
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106 static PyObject *
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107 meth_getattr(m, name)
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108 PyCFunctionObject *m;
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109 char *name;
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110 {
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111 if (strcmp(name, "__name__") == 0) {
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112 return PyString_FromString(m->m_ml->ml_name);
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113 }
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114 if (strcmp(name, "__doc__") == 0) {
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115 char *doc = m->m_ml->ml_doc;
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116 if (doc != NULL)
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117 return PyString_FromString(doc);
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118 Py_INCREF(Py_None);
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119 return Py_None;
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120 }
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121 if (strcmp(name, "__self__") == 0) {
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122 PyObject *self;
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123 if (PyEval_GetRestricted()) {
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124 PyErr_SetString(PyExc_RuntimeError,
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125 "method.__self__ not accessible in restricted mode");
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126 return NULL;
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127 }
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128 self = m->m_self;
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129 if (self == NULL)
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130 self = Py_None;
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131 Py_INCREF(self);
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132 return self;
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133 }
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134 if (strcmp(name, "__members__") == 0) {
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135 return Py_BuildValue("[sss]",
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136 "__doc__", "__name__", "__self__");
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137 }
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138 PyErr_SetString(PyExc_AttributeError, name);
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139 return NULL;
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140 }
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141
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142 static PyObject *
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143 meth_repr(m)
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144 PyCFunctionObject *m;
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145 {
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146 char buf[200];
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147 if (m->m_self == NULL)
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148 sprintf(buf, "<built-in function %.80s>", m->m_ml->ml_name);
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149 else
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150 sprintf(buf,
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151 "<built-in method %.80s of %.80s object at %lx>",
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152 m->m_ml->ml_name, m->m_self->ob_type->tp_name,
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153 (long)m->m_self);
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154 return PyString_FromString(buf);
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155 }
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156
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157 static int
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158 meth_compare(a, b)
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159 PyCFunctionObject *a, *b;
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160 {
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161 if (a->m_self != b->m_self)
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162 return (a->m_self < b->m_self) ? -1 : 1;
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163 if (a->m_ml->ml_meth == b->m_ml->ml_meth)
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164 return 0;
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165 if (strcmp(a->m_ml->ml_name, b->m_ml->ml_name) < 0)
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166 return -1;
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167 else
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168 return 1;
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169 }
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170
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171 static long
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172 meth_hash(a)
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173 PyCFunctionObject *a;
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174 {
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175 long x,y;
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176 if (a->m_self == NULL)
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177 x = 0;
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178 else {
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179 x = PyObject_Hash(a->m_self);
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180 if (x == -1)
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181 return -1;
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182 }
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183 y = _Py_HashPointer(a->m_ml->ml_meth);
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184 if (y == -1)
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185 return -1;
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186 x ^= y;
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187 if (x == -1)
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188 x = -2;
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189 return x;
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190 }
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191
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192 PyTypeObject PyCFunction_Type = {
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193 PyObject_HEAD_INIT(&PyType_Type)
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194 0,
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195 "builtin_function_or_method",
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196 sizeof(PyCFunctionObject),
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197 0,
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198 (destructor)meth_dealloc, /*tp_dealloc*/
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199 0, /*tp_print*/
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200 (getattrfunc)meth_getattr, /*tp_getattr*/
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201 0, /*tp_setattr*/
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202 (cmpfunc)meth_compare, /*tp_compare*/
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203 (reprfunc)meth_repr, /*tp_repr*/
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204 0, /*tp_as_number*/
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205 0, /*tp_as_sequence*/
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206 0, /*tp_as_mapping*/
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207 (hashfunc)meth_hash, /*tp_hash*/
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208 };
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209
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210 /* List all methods in a chain -- helper for findmethodinchain */
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211
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212 static PyObject *
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213 listmethodchain(chain)
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214 PyMethodChain *chain;
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215 {
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216 PyMethodChain *c;
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217 PyMethodDef *ml;
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218 int i, n;
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219 PyObject *v;
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220
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221 n = 0;
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222 for (c = chain; c != NULL; c = c->link) {
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223 for (ml = c->methods; ml->ml_name != NULL; ml++)
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224 n++;
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225 }
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226 v = PyList_New(n);
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227 if (v == NULL)
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228 return NULL;
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229 i = 0;
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230 for (c = chain; c != NULL; c = c->link) {
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231 for (ml = c->methods; ml->ml_name != NULL; ml++) {
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232 PyList_SetItem(v, i, PyString_FromString(ml->ml_name));
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233 i++;
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234 }
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235 }
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236 if (PyErr_Occurred()) {
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237 Py_DECREF(v);
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238 return NULL;
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239 }
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240 PyList_Sort(v);
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241 return v;
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242 }
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243
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244 /* Find a method in a method chain */
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245
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246 PyObject *
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247 Py_FindMethodInChain(chain, self, name)
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248 PyMethodChain *chain;
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249 PyObject *self;
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250 char *name;
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251 {
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252 if (name[0] == '_' && name[1] == '_') {
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253 if (strcmp(name, "__methods__") == 0)
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254 return listmethodchain(chain);
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255 if (strcmp(name, "__doc__") == 0) {
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256 char *doc = self->ob_type->tp_doc;
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257 if (doc != NULL)
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258 return PyString_FromString(doc);
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259 }
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260 }
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261 while (chain != NULL) {
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262 PyMethodDef *ml = chain->methods;
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263 for (; ml->ml_name != NULL; ml++) {
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264 if (name[0] == ml->ml_name[0] &&
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265 strcmp(name+1, ml->ml_name+1) == 0)
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266 return PyCFunction_New(ml, self);
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267 }
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268 chain = chain->link;
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269 }
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270 PyErr_SetString(PyExc_AttributeError, name);
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271 return NULL;
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272 }
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273
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274 /* Find a method in a single method list */
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275
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276 PyObject *
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277 Py_FindMethod(methods, self, name)
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278 PyMethodDef *methods;
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279 PyObject *self;
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280 char *name;
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281 {
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282 PyMethodChain chain;
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283 chain.methods = methods;
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284 chain.link = NULL;
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285 return Py_FindMethodInChain(&chain, self, name);
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286 }
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287
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288 /* Clear out the free list */
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289
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290 void
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291 PyCFunction_Fini()
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Guido van Rossum <guido@python.org>
parents: 5396
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292 {
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Guido van Rossum <guido@python.org>
parents: 5396
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293 while (free_list) {
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Guido van Rossum <guido@python.org>
parents: 5396
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294 PyCFunctionObject *v = free_list;
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Guido van Rossum <guido@python.org>
parents: 5396
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295 free_list = (PyCFunctionObject *)(v->m_self);
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1c7c2dd1beb1 Vladimir Marangozov's long-awaited malloc restructuring.
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parents: 11673
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296 PyObject_DEL(v);
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Guido van Rossum <guido@python.org>
parents: 5396
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297 }
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Guido van Rossum <guido@python.org>
parents: 5396
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298 }