Mercurial > cpython-lru_cache-weakref

annotate Objects/funcobject.c @ 13184:efecbbf72765 legacy-trunk

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Describe a bit about writing test cases for Python...
author Skip Montanaro <skip@pobox.com>
date Fri, 30 Jun 2000 06:08:35 +0000
parents 54bffdddc0ef
children ff243b0f16ee
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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 /* Function object implementation */
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33
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34 #include "Python.h"
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35 #include "compile.h"
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36 #include "structmember.h"
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37
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38 PyObject *
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39 PyFunction_New(code, globals)
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40 PyObject *code;
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41 PyObject *globals;
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42 {
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43 PyFunctionObject *op = PyObject_NEW(PyFunctionObject,
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44 &PyFunction_Type);
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45 if (op != NULL) {
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46 PyObject *doc;
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47 PyObject *consts;
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48 Py_INCREF(code);
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49 op->func_code = code;
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50 Py_INCREF(globals);
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51 op->func_globals = globals;
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52 op->func_name = ((PyCodeObject *)code)->co_name;
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53 Py_INCREF(op->func_name);
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54 op->func_defaults = NULL; /* No default arguments */
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55 consts = ((PyCodeObject *)code)->co_consts;
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56 if (PyTuple_Size(consts) >= 1) {
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57 doc = PyTuple_GetItem(consts, 0);
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58 if (!PyString_Check(doc) && !PyUnicode_Check(doc))
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59 doc = Py_None;
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60 }
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61 else
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62 doc = Py_None;
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63 Py_INCREF(doc);
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64 op->func_doc = doc;
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65 }
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66 PyObject_GC_Init(op);
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67 return (PyObject *)op;
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68 }
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69
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70 PyObject *
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71 PyFunction_GetCode(op)
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72 PyObject *op;
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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 NULL;
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77 }
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78 return ((PyFunctionObject *) op) -> func_code;
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79 }
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80
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81 PyObject *
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82 PyFunction_GetGlobals(op)
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83 PyObject *op;
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84 {
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85 if (!PyFunction_Check(op)) {
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86 PyErr_BadInternalCall();
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87 return NULL;
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88 }
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89 return ((PyFunctionObject *) op) -> func_globals;
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90 }
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91
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92 PyObject *
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93 PyFunction_GetDefaults(op)
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94 PyObject *op;
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95 {
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96 if (!PyFunction_Check(op)) {
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97 PyErr_BadInternalCall();
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98 return NULL;
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99 }
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100 return ((PyFunctionObject *) op) -> func_defaults;
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101 }
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102
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103 int
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104 PyFunction_SetDefaults(op, defaults)
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105 PyObject *op;
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106 PyObject *defaults;
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107 {
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108 if (!PyFunction_Check(op)) {
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109 PyErr_BadInternalCall();
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110 return -1;
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111 }
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112 if (defaults == Py_None)
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113 defaults = NULL;
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114 else if (PyTuple_Check(defaults)) {
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115 Py_XINCREF(defaults);
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116 }
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117 else {
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118 PyErr_SetString(PyExc_SystemError, "non-tuple default args");
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119 return -1;
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120 }
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121 Py_XDECREF(((PyFunctionObject *) op) -> func_defaults);
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122 ((PyFunctionObject *) op) -> func_defaults = defaults;
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123 return 0;
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124 }
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125
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126 /* Methods */
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127
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128 #define OFF(x) offsetof(PyFunctionObject, x)
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129
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130 static struct memberlist func_memberlist[] = {
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131 {"func_code", T_OBJECT, OFF(func_code)},
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132 {"func_globals",T_OBJECT, OFF(func_globals), READONLY},
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133 {"func_name", T_OBJECT, OFF(func_name), READONLY},
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134 {"__name__", T_OBJECT, OFF(func_name), READONLY},
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135 {"func_defaults",T_OBJECT, OFF(func_defaults)},
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136 {"func_doc", T_OBJECT, OFF(func_doc)},
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137 {"__doc__", T_OBJECT, OFF(func_doc)},
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138 {NULL} /* Sentinel */
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139 };
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140
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141 static PyObject *
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142 func_getattr(op, name)
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143 PyFunctionObject *op;
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144 char *name;
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145 {
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146 if (name[0] != '_' && PyEval_GetRestricted()) {
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147 PyErr_SetString(PyExc_RuntimeError,
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148 "function attributes not accessible in restricted mode");
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149 return NULL;
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150 }
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151 return PyMember_Get((char *)op, func_memberlist, name);
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152 }
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153
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154 static int
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155 func_setattr(op, name, value)
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156 PyFunctionObject *op;
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157 char *name;
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158 PyObject *value;
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159 {
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160 if (PyEval_GetRestricted()) {
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161 PyErr_SetString(PyExc_RuntimeError,
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162 "function attributes not settable in restricted mode");
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163 return -1;
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164 }
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165 if (strcmp(name, "func_code") == 0) {
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166 if (value == NULL || !PyCode_Check(value)) {
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167 PyErr_SetString(
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168 PyExc_TypeError,
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169 "func_code must be set to a code object");
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170 return -1;
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171 }
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172 }
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173 else if (strcmp(name, "func_defaults") == 0) {
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174 if (value != Py_None && !PyTuple_Check(value)) {
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175 PyErr_SetString(
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176 PyExc_TypeError,
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177 "func_defaults must be set to a tuple 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 return PyMember_Set((char *)op, func_memberlist, name, value);
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184 }
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185
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186 static void
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187 func_dealloc(op)
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188 PyFunctionObject *op;
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189 {
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190 PyObject_GC_Fini(op);
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191 Py_DECREF(op->func_code);
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192 Py_DECREF(op->func_globals);
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193 Py_DECREF(op->func_name);
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194 Py_XDECREF(op->func_defaults);
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195 Py_XDECREF(op->func_doc);
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196 PyObject_DEL(op);
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197 }
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198
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199 static PyObject*
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200 func_repr(op)
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201 PyFunctionObject *op;
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202 {
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203 char buf[140];
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204 if (op->func_name == Py_None)
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205 sprintf(buf, "<anonymous function at %lx>", (long)op);
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206 else
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207 sprintf(buf, "<function %.100s at %lx>",
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208 PyString_AsString(op->func_name),
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209 (long)op);
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210 return PyString_FromString(buf);
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211 }
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212
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213 static int
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214 func_compare(f, g)
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215 PyFunctionObject *f, *g;
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216 {
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217 int c;
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218 if (f->func_globals != g->func_globals)
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219 return (f->func_globals < g->func_globals) ? -1 : 1;
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220 if (f->func_defaults != g->func_defaults) {
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221 if (f->func_defaults == NULL)
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222 return -1;
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223 if (g->func_defaults == NULL)
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224 return 1;
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225 c = PyObject_Compare(f->func_defaults, g->func_defaults);
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226 if (c != 0)
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227 return c;
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228 }
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229 return PyObject_Compare(f->func_code, g->func_code);
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230 }
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231
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232 static long
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233 func_hash(f)
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234 PyFunctionObject *f;
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235 {
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236 long h,x;
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237 h = PyObject_Hash(f->func_code);
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238 if (h == -1) return h;
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239 x = _Py_HashPointer(f->func_globals);
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240 if (x == -1) return x;
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241 h ^= x;
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242 if (h == -1) h = -2;
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243 return h;
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244 }
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245
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246 static int
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247 func_traverse(PyFunctionObject *f, visitproc visit, void *arg)
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248 {
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249 int err;
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250 if (f->func_code) {
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251 err = visit(f->func_code, arg);
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252 if (err)
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253 return err;
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254 }
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255 if (f->func_globals) {
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256 err = visit(f->func_globals, arg);
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257 if (err)
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258 return err;
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259 }
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260 if (f->func_defaults) {
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261 err = visit(f->func_defaults, arg);
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262 if (err)
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263 return err;
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264 }
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265 if (f->func_doc) {
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266 err = visit(f->func_doc, arg);
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267 if (err)
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268 return err;
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269 }
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270 if (f->func_name) {
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271 err = visit(f->func_name, arg);
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272 if (err)
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273 return err;
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274 }
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275 return 0;
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diff changeset
276 }
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277
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278 PyTypeObject PyFunction_Type = {
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279 PyObject_HEAD_INIT(&PyType_Type)
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280 0,
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281 "function",
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282 sizeof(PyFunctionObject) + PyGC_HEAD_SIZE,
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283 0,
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284 (destructor)func_dealloc, /*tp_dealloc*/
84
a79cbb2655ba Function objects no longer contain a parse tree node, but intermediate
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diff changeset
285 0, /*tp_print*/
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286 (getattrfunc)func_getattr, /*tp_getattr*/
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287 (setattrfunc)func_setattr, /*tp_setattr*/
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288 (cmpfunc)func_compare, /*tp_compare*/
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289 (reprfunc)func_repr, /*tp_repr*/
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290 0, /*tp_as_number*/
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291 0, /*tp_as_sequence*/
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292 0, /*tp_as_mapping*/
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293 (hashfunc)func_hash, /*tp_hash*/
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294 0, /*tp_call*/
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295 0, /*tp_str*/
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296 0, /*tp_getattro*/
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297 0, /*tp_setattro*/
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298 0, /* tp_as_buffer */
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299 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_GC, /*tp_flags*/
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300 0, /* tp_doc */
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301 (traverseproc)func_traverse, /* tp_traverse */
6
fc6fcd7df4f7 Initial revision
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302 };