Mercurial > cpython-lru_cache-weakref

annotate Objects/methodobject.c @ 13778:f6e4a9dd67cd legacy-trunk

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Rename the "parser" package to "parsers" to be compatible with the PyXML project.
author Fred Drake <fdrake@acm.org>
date Mon, 31 Jul 2000 23:59:54 +0000
parents ef2ebb3b0c64
children 6f6f965c5e2d
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1 /***********************************************************
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2 Copyright (c) 2000, BeOpen.com.
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3 Copyright (c) 1995-2000, Corporation for National Research Initiatives.
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4 Copyright (c) 1990-1995, Stichting Mathematisch Centrum.
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5 All rights reserved.
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6
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7 See the file "Misc/COPYRIGHT" for information on usage and
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8 redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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9 ******************************************************************/
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10
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11 /* Method object implementation */
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12
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13 #include "Python.h"
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14
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15 #include "token.h"
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16
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17 static PyCFunctionObject *free_list = NULL;
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18
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19 PyObject *
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20 PyCFunction_New(PyMethodDef *ml, PyObject *self)
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21 {
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22 PyCFunctionObject *op;
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23 op = free_list;
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24 if (op != NULL) {
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25 free_list = (PyCFunctionObject *)(op->m_self);
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26 PyObject_INIT(op, &PyCFunction_Type);
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27 }
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28 else {
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29 op = PyObject_NEW(PyCFunctionObject, &PyCFunction_Type);
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30 if (op == NULL)
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31 return NULL;
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32 }
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33 op->m_ml = ml;
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34 Py_XINCREF(self);
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35 op->m_self = self;
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36 return (PyObject *)op;
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37 }
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38
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39 PyCFunction
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40 PyCFunction_GetFunction(PyObject *op)
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41 {
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42 if (!PyCFunction_Check(op)) {
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43 PyErr_BadInternalCall();
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44 return NULL;
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45 }
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46 return ((PyCFunctionObject *)op) -> m_ml -> ml_meth;
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47 }
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48
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49 PyObject *
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50 PyCFunction_GetSelf(PyObject *op)
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51 {
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52 if (!PyCFunction_Check(op)) {
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53 PyErr_BadInternalCall();
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54 return NULL;
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55 }
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56 return ((PyCFunctionObject *)op) -> m_self;
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57 }
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58
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59 int
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60 PyCFunction_GetFlags(PyObject *op)
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61 {
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62 if (!PyCFunction_Check(op)) {
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63 PyErr_BadInternalCall();
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64 return -1;
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65 }
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66 return ((PyCFunctionObject *)op) -> m_ml -> ml_flags;
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67 }
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68
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69 /* Methods (the standard built-in methods, that is) */
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70
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71 static void
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72 meth_dealloc(PyCFunctionObject *m)
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73 {
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74 Py_XDECREF(m->m_self);
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75 m->m_self = (PyObject *)free_list;
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76 free_list = m;
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77 }
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78
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79 static PyObject *
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80 meth_getattr(PyCFunctionObject *m, char *name)
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81 {
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82 if (strcmp(name, "__name__") == 0) {
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83 return PyString_FromString(m->m_ml->ml_name);
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84 }
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85 if (strcmp(name, "__doc__") == 0) {
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86 char *doc = m->m_ml->ml_doc;
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87 if (doc != NULL)
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88 return PyString_FromString(doc);
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89 Py_INCREF(Py_None);
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90 return Py_None;
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91 }
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92 if (strcmp(name, "__self__") == 0) {
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93 PyObject *self;
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94 if (PyEval_GetRestricted()) {
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95 PyErr_SetString(PyExc_RuntimeError,
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96 "method.__self__ not accessible in restricted mode");
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97 return NULL;
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98 }
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99 self = m->m_self;
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100 if (self == NULL)
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101 self = Py_None;
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102 Py_INCREF(self);
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103 return self;
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104 }
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105 if (strcmp(name, "__members__") == 0) {
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106 return Py_BuildValue("[sss]",
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107 "__doc__", "__name__", "__self__");
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108 }
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109 PyErr_SetString(PyExc_AttributeError, name);
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110 return NULL;
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111 }
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112
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113 static PyObject *
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114 meth_repr(PyCFunctionObject *m)
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115 {
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116 char buf[200];
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117 if (m->m_self == NULL)
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118 sprintf(buf, "<built-in function %.80s>", m->m_ml->ml_name);
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119 else
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120 sprintf(buf,
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121 "<built-in method %.80s of %.80s object at %p>",
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122 m->m_ml->ml_name, m->m_self->ob_type->tp_name,
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123 m->m_self);
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124 return PyString_FromString(buf);
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125 }
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126
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127 static int
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128 meth_compare(PyCFunctionObject *a, PyCFunctionObject *b)
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129 {
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130 if (a->m_self != b->m_self)
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131 return (a->m_self < b->m_self) ? -1 : 1;
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132 if (a->m_ml->ml_meth == b->m_ml->ml_meth)
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133 return 0;
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134 if (strcmp(a->m_ml->ml_name, b->m_ml->ml_name) < 0)
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135 return -1;
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136 else
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137 return 1;
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138 }
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139
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140 static long
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141 meth_hash(PyCFunctionObject *a)
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142 {
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143 long x,y;
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144 if (a->m_self == NULL)
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145 x = 0;
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146 else {
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147 x = PyObject_Hash(a->m_self);
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148 if (x == -1)
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149 return -1;
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150 }
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151 y = _Py_HashPointer((void*)(a->m_ml->ml_meth));
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152 if (y == -1)
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153 return -1;
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154 x ^= y;
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155 if (x == -1)
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156 x = -2;
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157 return x;
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158 }
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159
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160 PyTypeObject PyCFunction_Type = {
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161 PyObject_HEAD_INIT(&PyType_Type)
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162 0,
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163 "builtin_function_or_method",
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164 sizeof(PyCFunctionObject),
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165 0,
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166 (destructor)meth_dealloc, /*tp_dealloc*/
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167 0, /*tp_print*/
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168 (getattrfunc)meth_getattr, /*tp_getattr*/
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169 0, /*tp_setattr*/
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170 (cmpfunc)meth_compare, /*tp_compare*/
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171 (reprfunc)meth_repr, /*tp_repr*/
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172 0, /*tp_as_number*/
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173 0, /*tp_as_sequence*/
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174 0, /*tp_as_mapping*/
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175 (hashfunc)meth_hash, /*tp_hash*/
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176 };
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177
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178 /* List all methods in a chain -- helper for findmethodinchain */
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179
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180 static PyObject *
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181 listmethodchain(PyMethodChain *chain)
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182 {
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183 PyMethodChain *c;
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184 PyMethodDef *ml;
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185 int i, n;
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186 PyObject *v;
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187
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188 n = 0;
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189 for (c = chain; c != NULL; c = c->link) {
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190 for (ml = c->methods; ml->ml_name != NULL; ml++)
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191 n++;
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192 }
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193 v = PyList_New(n);
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194 if (v == NULL)
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195 return NULL;
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196 i = 0;
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197 for (c = chain; c != NULL; c = c->link) {
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198 for (ml = c->methods; ml->ml_name != NULL; ml++) {
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199 PyList_SetItem(v, i, PyString_FromString(ml->ml_name));
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200 i++;
395
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201 }
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202 }
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203 if (PyErr_Occurred()) {
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204 Py_DECREF(v);
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205 return NULL;
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206 }
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207 PyList_Sort(v);
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208 return v;
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209 }
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210
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211 /* Find a method in a method chain */
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212
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213 PyObject *
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214 Py_FindMethodInChain(PyMethodChain *chain, PyObject *self, char *name)
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215 {
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216 if (name[0] == '_' && name[1] == '_') {
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217 if (strcmp(name, "__methods__") == 0)
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218 return listmethodchain(chain);
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219 if (strcmp(name, "__doc__") == 0) {
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220 char *doc = self->ob_type->tp_doc;
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221 if (doc != NULL)
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222 return PyString_FromString(doc);
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223 }
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224 }
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225 while (chain != NULL) {
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226 PyMethodDef *ml = chain->methods;
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227 for (; ml->ml_name != NULL; ml++) {
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228 if (name[0] == ml->ml_name[0] &&
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229 strcmp(name+1, ml->ml_name+1) == 0)
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230 return PyCFunction_New(ml, self);
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231 }
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232 chain = chain->link;
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233 }
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234 PyErr_SetString(PyExc_AttributeError, name);
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235 return NULL;
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236 }
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237
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238 /* Find a method in a single method list */
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239
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240 PyObject *
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241 Py_FindMethod(PyMethodDef *methods, PyObject *self, char *name)
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242 {
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243 PyMethodChain chain;
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244 chain.methods = methods;
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245 chain.link = NULL;
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246 return Py_FindMethodInChain(&chain, self, name);
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247 }
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248
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249 /* Clear out the free list */
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250
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251 void
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252 PyCFunction_Fini(void)
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253 {
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254 while (free_list) {
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255 PyCFunctionObject *v = free_list;
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256 free_list = (PyCFunctionObject *)(v->m_self);
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257 PyObject_DEL(v);
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258 }
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259 }