Mercurial > cpython-lru_cache-weakref

annotate Objects/methodobject.c @ 7278:59d2761ba1cf legacy-trunk

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Remove obsolete pagenumbering / pagestyle cruft.
author Fred Drake <fdrake@acm.org>
date Fri, 13 Feb 1998 07:08:56 +0000
parents 0369d63b100b
children 19e8016cd38c
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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 typedef struct {
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39 PyObject_HEAD
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40 PyMethodDef *m_ml;
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41 PyObject *m_self;
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42 } PyCFunctionObject;
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43
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44 static PyCFunctionObject *free_list = NULL;
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45
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46 PyObject *
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47 PyCFunction_New(ml, self)
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48 PyMethodDef *ml;
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49 PyObject *self;
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50 {
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51 PyCFunctionObject *op;
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52 op = free_list;
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53 if (op != NULL) {
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54 free_list = (PyCFunctionObject *)(op->m_self);
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55 op->ob_type = &PyCFunction_Type;
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56 _Py_NewReference(op);
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57 }
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58 else {
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59 op = PyObject_NEW(PyCFunctionObject, &PyCFunction_Type);
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60 if (op == NULL)
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61 return NULL;
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62 }
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63 op->m_ml = ml;
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64 Py_XINCREF(self);
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65 op->m_self = self;
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66 return (PyObject *)op;
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67 }
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68
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69 PyCFunction
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70 PyCFunction_GetFunction(op)
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71 PyObject *op;
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72 {
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73 if (!PyCFunction_Check(op)) {
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74 PyErr_BadInternalCall();
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75 return NULL;
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76 }
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77 return ((PyCFunctionObject *)op) -> m_ml -> ml_meth;
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78 }
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79
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80 PyObject *
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81 PyCFunction_GetSelf(op)
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82 PyObject *op;
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83 {
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84 if (!PyCFunction_Check(op)) {
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85 PyErr_BadInternalCall();
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86 return NULL;
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87 }
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88 return ((PyCFunctionObject *)op) -> m_self;
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89 }
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90
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91 int
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92 PyCFunction_GetFlags(op)
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93 PyObject *op;
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94 {
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95 if (!PyCFunction_Check(op)) {
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96 PyErr_BadInternalCall();
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97 return -1;
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98 }
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99 return ((PyCFunctionObject *)op) -> m_ml -> ml_flags;
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100 }
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101
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102 /* Methods (the standard built-in methods, that is) */
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103
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104 static void
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105 meth_dealloc(m)
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106 PyCFunctionObject *m;
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107 {
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108 Py_XDECREF(m->m_self);
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109 m->m_self = (PyObject *)free_list;
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110 free_list = m;
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111 }
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112
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113 static PyObject *
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114 meth_getattr(m, name)
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115 PyCFunctionObject *m;
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116 char *name;
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117 {
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118 if (strcmp(name, "__name__") == 0) {
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119 return PyString_FromString(m->m_ml->ml_name);
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120 }
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121 if (strcmp(name, "__doc__") == 0) {
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122 char *doc = m->m_ml->ml_doc;
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123 if (doc != NULL)
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124 return PyString_FromString(doc);
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125 Py_INCREF(Py_None);
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126 return Py_None;
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127 }
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128 if (strcmp(name, "__self__") == 0) {
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129 PyObject *self;
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130 if (PyEval_GetRestricted()) {
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131 PyErr_SetString(PyExc_RuntimeError,
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132 "method.__self__ not accessible in restricted mode");
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133 return NULL;
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134 }
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135 self = m->m_self;
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136 if (self == NULL)
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137 self = Py_None;
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138 Py_INCREF(self);
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139 return self;
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140 }
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141 if (strcmp(name, "__members__") == 0) {
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142 return Py_BuildValue("[sss]",
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143 "__doc__", "__name__", "__self__");
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144 }
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145 PyErr_SetString(PyExc_AttributeError, name);
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146 return NULL;
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147 }
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148
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149 static PyObject *
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150 meth_repr(m)
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151 PyCFunctionObject *m;
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152 {
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153 char buf[200];
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154 if (m->m_self == NULL)
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155 sprintf(buf, "<built-in function %.80s>", m->m_ml->ml_name);
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156 else
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157 sprintf(buf,
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158 "<built-in method %.80s of %.80s object at %lx>",
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159 m->m_ml->ml_name, m->m_self->ob_type->tp_name,
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160 (long)m->m_self);
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161 return PyString_FromString(buf);
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162 }
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163
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164 static int
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165 meth_compare(a, b)
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166 PyCFunctionObject *a, *b;
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167 {
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168 if (a->m_self != b->m_self)
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169 return PyObject_Compare(a->m_self, b->m_self);
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170 if (a->m_ml->ml_meth == b->m_ml->ml_meth)
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171 return 0;
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172 if (strcmp(a->m_ml->ml_name, b->m_ml->ml_name) < 0)
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173 return -1;
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174 else
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175 return 1;
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176 }
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177
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178 static long
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179 meth_hash(a)
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180 PyCFunctionObject *a;
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181 {
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182 long x;
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183 if (a->m_self == NULL)
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184 x = 0;
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185 else {
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186 x = PyObject_Hash(a->m_self);
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187 if (x == -1)
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188 return -1;
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189 }
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190 return x ^ (long) a->m_ml->ml_meth;
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191 }
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192
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193 PyTypeObject PyCFunction_Type = {
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194 PyObject_HEAD_INIT(&PyType_Type)
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195 0,
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196 "builtin_function_or_method",
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197 sizeof(PyCFunctionObject),
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198 0,
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199 (destructor)meth_dealloc, /*tp_dealloc*/
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200 0, /*tp_print*/
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201 (getattrfunc)meth_getattr, /*tp_getattr*/
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202 0, /*tp_setattr*/
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203 (cmpfunc)meth_compare, /*tp_compare*/
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204 (reprfunc)meth_repr, /*tp_repr*/
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205 0, /*tp_as_number*/
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206 0, /*tp_as_sequence*/
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207 0, /*tp_as_mapping*/
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208 (hashfunc)meth_hash, /*tp_hash*/
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209 };
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210
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211 /* List all methods in a chain -- helper for findmethodinchain */
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212
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213 static PyObject *
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214 listmethodchain(chain)
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215 PyMethodChain *chain;
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216 {
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217 PyMethodChain *c;
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218 PyMethodDef *ml;
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219 int i, n;
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220 PyObject *v;
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221
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222 n = 0;
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223 for (c = chain; c != NULL; c = c->link) {
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224 for (ml = c->methods; ml->ml_name != NULL; ml++)
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225 n++;
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226 }
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227 v = PyList_New(n);
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228 if (v == NULL)
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229 return NULL;
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230 i = 0;
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231 for (c = chain; c != NULL; c = c->link) {
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232 for (ml = c->methods; ml->ml_name != NULL; ml++) {
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233 PyList_SetItem(v, i, PyString_FromString(ml->ml_name));
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234 i++;
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235 }
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236 }
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237 if (PyErr_Occurred()) {
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238 Py_DECREF(v);
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239 return NULL;
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240 }
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241 PyList_Sort(v);
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242 return v;
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243 }
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244
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245 /* Find a method in a method chain */
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246
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247 PyObject *
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248 Py_FindMethodInChain(chain, self, name)
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249 PyMethodChain *chain;
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250 PyObject *self;
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251 char *name;
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252 {
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253 if (strcmp(name, "__methods__") == 0)
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254 return listmethodchain(chain);
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255 while (chain != NULL) {
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256 PyMethodDef *ml = chain->methods;
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257 for (; ml->ml_name != NULL; ml++) {
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258 if (name[0] == ml->ml_name[0] &&
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259 strcmp(name+1, ml->ml_name+1) == 0)
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260 return PyCFunction_New(ml, self);
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261 }
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262 chain = chain->link;
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263 }
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264 PyErr_SetString(PyExc_AttributeError, name);
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265 return NULL;
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266 }
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267
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268 /* Find a method in a single method list */
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269
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270 PyObject *
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271 Py_FindMethod(methods, self, name)
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272 PyMethodDef *methods;
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273 PyObject *self;
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274 char *name;
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275 {
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276 PyMethodChain chain;
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277 chain.methods = methods;
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278 chain.link = NULL;
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279 return Py_FindMethodInChain(&chain, self, name);
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280 }
5934
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281
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282 /* Clear out the free list */
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283
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284 void
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285 PyCFunction_Fini()
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286 {
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287 while (free_list) {
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288 PyCFunctionObject *v = free_list;
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289 free_list = (PyCFunctionObject *)(v->m_self);
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290 PyMem_DEL(v);
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291 }
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292 }