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annotate Python/structmember.c @ 54293:bd2fb1be130e 3.0

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Merged revisions 72874 via svnmerge from svn+ssh://pythondev@svn.python.org/python/branches/py3k ................ r72874 | benjamin.peterson | 2009-05-23 14:36:27 -0500 (Sat, 23 May 2009) | 13 lines Merged revisions 72871-72872 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r72871 | benjamin.peterson | 2009-05-23 14:24:37 -0500 (Sat, 23 May 2009) | 1 line support building with subversion 1.7 #6094 ........ r72872 | benjamin.peterson | 2009-05-23 14:31:02 -0500 (Sat, 23 May 2009) | 1 line reorder name ........ ................
author Benjamin Peterson <benjamin@python.org>
date Sat, 23 May 2009 19:42:15 +0000
parents 85b67fb5672b
children 46f4b7b5b4dd
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1
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2 /* Map C struct members to Python object attributes */
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3
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4 #include "Python.h"
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5
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6 #include "structmember.h"
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7
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8 PyObject *
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9 PyMember_GetOne(const char *addr, PyMemberDef *l)
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10 {
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11 PyObject *v;
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12
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13 addr += l->offset;
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14 switch (l->type) {
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15 case T_BOOL:
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16 v = PyBool_FromLong(*(char*)addr);
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17 break;
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18 case T_BYTE:
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19 v = PyLong_FromLong(*(char*)addr);
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20 break;
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21 case T_UBYTE:
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22 v = PyLong_FromUnsignedLong(*(unsigned char*)addr);
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23 break;
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24 case T_SHORT:
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25 v = PyLong_FromLong(*(short*)addr);
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26 break;
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27 case T_USHORT:
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28 v = PyLong_FromUnsignedLong(*(unsigned short*)addr);
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29 break;
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30 case T_INT:
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31 v = PyLong_FromLong(*(int*)addr);
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32 break;
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33 case T_UINT:
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34 v = PyLong_FromUnsignedLong(*(unsigned int*)addr);
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35 break;
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36 case T_LONG:
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37 v = PyLong_FromLong(*(long*)addr);
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38 break;
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39 case T_ULONG:
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40 v = PyLong_FromUnsignedLong(*(unsigned long*)addr);
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41 break;
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42 case T_PYSSIZET:
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43 v = PyLong_FromSsize_t(*(Py_ssize_t*)addr);
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44 break;
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45 case T_FLOAT:
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46 v = PyFloat_FromDouble((double)*(float*)addr);
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47 break;
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48 case T_DOUBLE:
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49 v = PyFloat_FromDouble(*(double*)addr);
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50 break;
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51 case T_STRING:
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52 if (*(char**)addr == NULL) {
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53 Py_INCREF(Py_None);
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54 v = Py_None;
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55 }
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56 else
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57 v = PyUnicode_FromString(*(char**)addr);
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58 break;
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59 case T_STRING_INPLACE:
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60 v = PyUnicode_FromString((char*)addr);
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61 break;
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62 case T_CHAR:
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63 v = PyUnicode_FromStringAndSize((char*)addr, 1);
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64 break;
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65 case T_OBJECT:
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66 v = *(PyObject **)addr;
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67 if (v == NULL)
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68 v = Py_None;
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69 Py_INCREF(v);
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70 break;
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71 case T_OBJECT_EX:
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72 v = *(PyObject **)addr;
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73 if (v == NULL)
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74 PyErr_SetString(PyExc_AttributeError, l->name);
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75 Py_XINCREF(v);
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76 break;
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77 #ifdef HAVE_LONG_LONG
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78 case T_LONGLONG:
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79 v = PyLong_FromLongLong(*(PY_LONG_LONG *)addr);
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80 break;
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81 case T_ULONGLONG:
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82 v = PyLong_FromUnsignedLongLong(*(unsigned PY_LONG_LONG *)addr);
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83 break;
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84 #endif /* HAVE_LONG_LONG */
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85 case T_NONE:
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86 v = Py_None;
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87 Py_INCREF(v);
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88 break;
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89 default:
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90 PyErr_SetString(PyExc_SystemError, "bad memberdescr type");
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91 v = NULL;
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92 }
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93 return v;
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94 }
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95
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96 #define WARN(msg) \
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97 do { \
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98 if (PyErr_WarnEx(PyExc_RuntimeWarning, msg, 1) < 0) \
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99 return -1; \
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100 } while (0)
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101
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102 int
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103 PyMember_SetOne(char *addr, PyMemberDef *l, PyObject *v)
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104 {
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105 PyObject *oldv;
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106
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107 if ((l->flags & READONLY) || l->type == T_STRING)
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108 {
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109 PyErr_SetString(PyExc_AttributeError, "readonly attribute");
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110 return -1;
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111 }
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112 if (v == NULL && l->type != T_OBJECT_EX && l->type != T_OBJECT) {
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113 PyErr_SetString(PyExc_TypeError,
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114 "can't delete numeric/char attribute");
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115 return -1;
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116 }
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117 addr += l->offset;
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118 switch (l->type) {
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119 case T_BOOL:{
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120 if (!PyBool_Check(v)) {
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121 PyErr_SetString(PyExc_TypeError,
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122 "attribute value type must be bool");
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123 return -1;
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124 }
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125 if (v == Py_True)
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126 *(char*)addr = (char) 1;
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127 else
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128 *(char*)addr = (char) 0;
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129 break;
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130 }
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131 case T_BYTE:{
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132 long long_val = PyLong_AsLong(v);
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133 if ((long_val == -1) && PyErr_Occurred())
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134 return -1;
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135 *(char*)addr = (char)long_val;
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136 /* XXX: For compatibility, only warn about truncations
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137 for now. */
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138 if ((long_val > CHAR_MAX) || (long_val < CHAR_MIN))
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139 WARN("Truncation of value to char");
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140 break;
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141 }
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142 case T_UBYTE:{
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143 long long_val = PyLong_AsLong(v);
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144 if ((long_val == -1) && PyErr_Occurred())
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145 return -1;
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146 *(unsigned char*)addr = (unsigned char)long_val;
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147 if ((long_val > UCHAR_MAX) || (long_val < 0))
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148 WARN("Truncation of value to unsigned char");
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149 break;
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150 }
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151 case T_SHORT:{
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152 long long_val = PyLong_AsLong(v);
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153 if ((long_val == -1) && PyErr_Occurred())
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154 return -1;
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155 *(short*)addr = (short)long_val;
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156 if ((long_val > SHRT_MAX) || (long_val < SHRT_MIN))
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157 WARN("Truncation of value to short");
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158 break;
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159 }
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160 case T_USHORT:{
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161 long long_val = PyLong_AsLong(v);
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162 if ((long_val == -1) && PyErr_Occurred())
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163 return -1;
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164 *(unsigned short*)addr = (unsigned short)long_val;
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165 if ((long_val > USHRT_MAX) || (long_val < 0))
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166 WARN("Truncation of value to unsigned short");
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167 break;
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168 }
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169 case T_INT:{
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170 long long_val = PyLong_AsLong(v);
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171 if ((long_val == -1) && PyErr_Occurred())
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172 return -1;
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173 *(int *)addr = (int)long_val;
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174 if ((long_val > INT_MAX) || (long_val < INT_MIN))
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175 WARN("Truncation of value to int");
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176 break;
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177 }
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178 case T_UINT:{
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179 unsigned long ulong_val = PyLong_AsUnsignedLong(v);
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180 if ((ulong_val == (unsigned int)-1) && PyErr_Occurred()) {
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181 /* XXX: For compatibility, accept negative int values
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182 as well. */
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183 PyErr_Clear();
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184 ulong_val = PyLong_AsLong(v);
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185 if ((ulong_val == (unsigned int)-1) && PyErr_Occurred())
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186 return -1;
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187 *(unsigned int *)addr = (unsigned int)ulong_val;
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188 WARN("Writing negative value into unsigned field");
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189 } else
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190 *(unsigned int *)addr = (unsigned int)ulong_val;
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191 if (ulong_val > UINT_MAX)
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192 WARN("Truncation of value to unsigned int");
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193 break;
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194 }
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195 case T_LONG:{
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196 *(long*)addr = PyLong_AsLong(v);
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197 if ((*(long*)addr == -1) && PyErr_Occurred())
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198 return -1;
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199 break;
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200 }
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201 case T_ULONG:{
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202 *(unsigned long*)addr = PyLong_AsUnsignedLong(v);
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203 if ((*(unsigned long*)addr == (unsigned long)-1)
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204 && PyErr_Occurred()) {
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205 /* XXX: For compatibility, accept negative int values
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206 as well. */
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207 PyErr_Clear();
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208 *(unsigned long*)addr = PyLong_AsLong(v);
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209 if ((*(unsigned long*)addr == (unsigned int)-1)
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210 && PyErr_Occurred())
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211 return -1;
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212 WARN("Writing negative value into unsigned field");
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213 }
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214 break;
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215 }
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216 case T_PYSSIZET:{
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217 *(Py_ssize_t*)addr = PyLong_AsSsize_t(v);
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218 if ((*(Py_ssize_t*)addr == (Py_ssize_t)-1)
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219 && PyErr_Occurred())
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220 return -1;
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221 break;
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222 }
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223 case T_FLOAT:{
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224 double double_val = PyFloat_AsDouble(v);
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225 if ((double_val == -1) && PyErr_Occurred())
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226 return -1;
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227 *(float*)addr = (float)double_val;
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228 break;
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229 }
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230 case T_DOUBLE:
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231 *(double*)addr = PyFloat_AsDouble(v);
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232 if ((*(double*)addr == -1) && PyErr_Occurred())
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233 return -1;
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234 break;
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diff changeset
235 case T_OBJECT:
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ef6f692c76e2 Fix SF bug #486144: Uninitialized __slot__ vrbl is None.
Guido van Rossum <guido@python.org>
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236 case T_OBJECT_EX:
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237 Py_XINCREF(v);
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238 oldv = *(PyObject **)addr;
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239 *(PyObject **)addr = v;
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240 Py_XDECREF(oldv);
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241 break;
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ea594306ea85 Issue #1950: Fixed misusage of PyUnicode_AsString().
Alexandre Vassalotti <alexandre@peadrop.com>
parents: 44885
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242 case T_CHAR: {
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Alexandre Vassalotti <alexandre@peadrop.com>
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243 char *string;
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244 Py_ssize_t len;
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Alexandre Vassalotti <alexandre@peadrop.com>
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245
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Alexandre Vassalotti <alexandre@peadrop.com>
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246 if (!PyUnicode_Check(v)) {
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247 PyErr_BadArgument();
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248 return -1;
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249 }
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250 string = _PyUnicode_AsStringAndSize(v, &len);
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251 if (len != 1) {
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252 PyErr_BadArgument();
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253 return -1;
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254 }
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255 *(char*)addr = string[0];
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256 break;
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257 }
34677
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
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258 #ifdef HAVE_LONG_LONG
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259 case T_LONGLONG:{
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260 PY_LONG_LONG value;
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261 *(PY_LONG_LONG*)addr = value = PyLong_AsLongLong(v);
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262 if ((value == -1) && PyErr_Occurred())
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263 return -1;
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264 break;
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265 }
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266 case T_ULONGLONG:{
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267 unsigned PY_LONG_LONG value;
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268 /* ??? PyLong_AsLongLong accepts an int, but PyLong_AsUnsignedLongLong
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269 doesn't ??? */
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270 if (PyLong_Check(v))
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271 *(unsigned PY_LONG_LONG*)addr = value = PyLong_AsUnsignedLongLong(v);
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272 else
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273 *(unsigned PY_LONG_LONG*)addr = value = PyLong_AsLong(v);
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274 if ((value == (unsigned PY_LONG_LONG)-1) && PyErr_Occurred())
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275 return -1;
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276 break;
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277 }
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Martin v. Löwis <martin@v.loewis.de>
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278 #endif /* HAVE_LONG_LONG */
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279 default:
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Jeremy Hylton <jeremy@alum.mit.edu>
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280 PyErr_Format(PyExc_SystemError,
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281 "bad memberdescr type for %s", l->name);
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282 return -1;
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283 }
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284 return 0;
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285 }