Mercurial > cpython-lru_cache-weakref

annotate Python/structmember.c @ 13956:8e8a8df0fe73 legacy-trunk

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The list comp patch checked for the second child node of the 'listmaker' node, without checking if the node actually had more than one child. It can have only one node, though: '[' test ']'. This fixes it.
author Thomas Wouters <thomas@python.org>
date Sun, 13 Aug 2000 17:05:17 +0000
parents f79434ee41fa
children 6f6f965c5e2d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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
86
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11 /* Map C struct members to Python object attributes */
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12
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13 #include "Python.h"
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14
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15 #include "structmember.h"
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16
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17 static PyObject *
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18 listmembers(struct memberlist *mlist)
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19 {
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20 int i, n;
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21 PyObject *v;
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22 for (n = 0; mlist[n].name != NULL; n++)
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23 ;
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24 v = PyList_New(n);
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25 if (v != NULL) {
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26 for (i = 0; i < n; i++)
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27 PyList_SetItem(v, i,
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28 PyString_FromString(mlist[i].name));
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29 if (PyErr_Occurred()) {
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30 Py_DECREF(v);
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31 v = NULL;
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32 }
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33 else {
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34 PyList_Sort(v);
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35 }
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36 }
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37 return v;
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38 }
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39
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40 PyObject *
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41 PyMember_Get(char *addr, struct memberlist *mlist, char *name)
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42 {
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43 struct memberlist *l;
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44
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45 if (strcmp(name, "__members__") == 0)
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46 return listmembers(mlist);
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47 for (l = mlist; l->name != NULL; l++) {
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48 if (strcmp(l->name, name) == 0) {
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49 PyObject *v;
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50 addr += l->offset;
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51 switch (l->type) {
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52 case T_BYTE:
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53 v = PyInt_FromLong((long)
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54 (((*(char*)addr & 0xff)
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55 ^ 0x80) - 0x80));
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56 break;
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57 case T_UBYTE:
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58 v = PyInt_FromLong((long) *(char*)addr & 0xff);
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59 break;
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60 case T_SHORT:
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61 v = PyInt_FromLong((long) *(short*)addr);
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62 break;
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63 case T_USHORT:
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64 v = PyInt_FromLong((long)
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65 *(unsigned short*)addr);
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66 break;
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67 case T_INT:
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68 v = PyInt_FromLong((long) *(int*)addr);
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69 break;
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70 case T_UINT:
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71 v = PyInt_FromLong((long)
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72 *(unsigned int*)addr);
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73 break;
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74 case T_LONG:
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75 v = PyInt_FromLong(*(long*)addr);
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76 break;
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77 case T_ULONG:
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78 v = PyLong_FromDouble((double)
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79 *(unsigned long*)addr);
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80 break;
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81 case T_FLOAT:
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82 v = PyFloat_FromDouble((double)*(float*)addr);
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83 break;
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84 case T_DOUBLE:
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85 v = PyFloat_FromDouble(*(double*)addr);
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86 break;
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87 case T_STRING:
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88 if (*(char**)addr == NULL) {
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89 Py_INCREF(Py_None);
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90 v = Py_None;
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91 }
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92 else
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93 v = PyString_FromString(*(char**)addr);
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94 break;
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95 case T_STRING_INPLACE:
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96 v = PyString_FromString((char*)addr);
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97 break;
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98 #ifdef macintosh
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99 case T_PSTRING:
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100 if (*(char**)addr == NULL) {
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101 Py_INCREF(Py_None);
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102 v = Py_None;
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103 }
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104 else
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105 v = PyString_FromStringAndSize(
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106 (*(char**)addr)+1,
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107 **(unsigned char**)addr);
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108 break;
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109 case T_PSTRING_INPLACE:
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110 v = PyString_FromStringAndSize(
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111 ((char*)addr)+1,
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112 *(unsigned char*)addr);
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113 break;
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114 #endif /* macintosh */
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115 case T_CHAR:
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116 v = PyString_FromStringAndSize((char*)addr, 1);
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117 break;
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118 case T_OBJECT:
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119 v = *(PyObject **)addr;
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120 if (v == NULL)
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121 v = Py_None;
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122 Py_INCREF(v);
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123 break;
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124 default:
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125 PyErr_SetString(PyExc_SystemError,
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126 "bad memberlist type");
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127 v = NULL;
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128 }
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129 return v;
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130 }
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131 }
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132
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133 PyErr_SetString(PyExc_AttributeError, name);
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134 return NULL;
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135 }
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136
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137 int
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138 PyMember_Set(char *addr, struct memberlist *mlist, char *name, PyObject *v)
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139 {
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140 struct memberlist *l;
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141 PyObject *oldv;
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142
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143 for (l = mlist; l->name != NULL; l++) {
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144 if (strcmp(l->name, name) == 0) {
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145 #ifdef macintosh
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146 if (l->readonly || l->type == T_STRING ||
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147 l->type == T_PSTRING)
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148 {
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149 #else
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150 if (l->readonly || l->type == T_STRING ) {
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151 #endif /* macintosh */
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152 PyErr_SetString(PyExc_TypeError,
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153 "readonly attribute");
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154 return -1;
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155 }
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156 if (v == NULL && l->type != T_OBJECT) {
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157 PyErr_SetString(PyExc_TypeError,
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158 "can't delete numeric/char attribute");
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159 return -1;
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160 }
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161 addr += l->offset;
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162 switch (l->type) {
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163 case T_BYTE:
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164 case T_UBYTE:
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165 if (!PyInt_Check(v)) {
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166 PyErr_BadArgument();
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167 return -1;
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168 }
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169 *(char*)addr = (char) PyInt_AsLong(v);
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170 break;
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171 case T_SHORT:
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172 case T_USHORT:
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173 if (!PyInt_Check(v)) {
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174 PyErr_BadArgument();
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175 return -1;
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176 }
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177 *(short*)addr = (short) PyInt_AsLong(v);
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178 break;
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179 case T_UINT:
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180 case T_INT:
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181 if (!PyInt_Check(v)) {
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182 PyErr_BadArgument();
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183 return -1;
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184 }
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185 *(int*)addr = (int) PyInt_AsLong(v);
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186 break;
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187 case T_LONG:
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188 if (!PyInt_Check(v)) {
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189 PyErr_BadArgument();
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190 return -1;
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191 }
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192 *(long*)addr = PyInt_AsLong(v);
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193 break;
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194 case T_ULONG:
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195 if (PyInt_Check(v))
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196 *(long*)addr = PyInt_AsLong(v);
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197 else if (PyLong_Check(v))
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198 *(long*)addr = PyLong_AsLong(v);
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199 else {
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200 PyErr_BadArgument();
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201 return -1;
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202 }
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203 break;
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204 case T_FLOAT:
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205 if (PyInt_Check(v))
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206 *(float*)addr =
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207 (float) PyInt_AsLong(v);
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208 else if (PyFloat_Check(v))
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209 *(float*)addr =
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210 (float) PyFloat_AsDouble(v);
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211 else {
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212 PyErr_BadArgument();
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213 return -1;
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214 }
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215 break;
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216 case T_DOUBLE:
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217 if (PyInt_Check(v))
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218 *(double*)addr =
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219 (double) PyInt_AsLong(v);
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220 else if (PyFloat_Check(v))
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221 *(double*)addr = PyFloat_AsDouble(v);
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222 else {
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223 PyErr_BadArgument();
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224 return -1;
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225 }
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226 break;
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227 case T_OBJECT:
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228 Py_XINCREF(v);
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ff31f2501742 Trivial little change: when setting a member to an object, hold the
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229 oldv = *(PyObject **)addr;
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230 *(PyObject **)addr = v;
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231 Py_XDECREF(oldv);
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232 break;
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233 case T_CHAR:
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234 if (PyString_Check(v) &&
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235 PyString_Size(v) == 1) {
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236 *(char*)addr =
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237 PyString_AsString(v)[0];
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238 }
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239 else {
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240 PyErr_BadArgument();
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241 return -1;
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242 }
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243 default:
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244 PyErr_SetString(PyExc_SystemError,
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245 "bad memberlist type");
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246 return -1;
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247 }
a6934380c6e7 "Compiling" version
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248 return 0;
a6934380c6e7 "Compiling" version
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249 }
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250 }
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251
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252 PyErr_SetString(PyExc_AttributeError, name);
95
a5bf7d5959ce Return -1 for errors.
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diff changeset
253 return -1;
86
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254 }