Mercurial > cpython-lru_cache-weakref

annotate Python/structmember.c @ 13973:4e28ca345cfe legacy-trunk

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Fix the parent of WindowsError - both the comments in this source file, and the previous exceptions.py have WindowsError as a sub-class of OSError.
author Mark Hammond <mhammond@skippinet.com.au>
date Tue, 15 Aug 2000 00:37:32 +0000
parents f79434ee41fa
children 6f6f965c5e2d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 /* 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 }
a6934380c6e7 "Compiling" version
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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 }