Mercurial > cpython-lru_cache-weakref

annotate Python/structmember.c @ 84172:e353f64dfd95

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importlib.abc.SourceLoader.get_source() was re-raising SyntaxError and UnicodeDecodeError as ImportError. That was over-reaching the point of raising ImportError in get_source() (which is to signal the source code was not found when it should have). Conflating the two exceptions with ImportError could lead to masking errors with the source which should be known outside of whether there was an error simply getting the source to begin with.
author Brett Cannon <brett@python.org>
date Sun, 16 Jun 2013 18:05:54 -0400
parents afe55cd04119
children
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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 addr += l->offset;
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108
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109 if ((l->flags & READONLY))
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110 {
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111 PyErr_SetString(PyExc_AttributeError, "readonly attribute");
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112 return -1;
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113 }
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114 if (v == NULL) {
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115 if (l->type == T_OBJECT_EX) {
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116 /* Check if the attribute is set. */
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117 if (*(PyObject **)addr == NULL) {
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118 PyErr_SetString(PyExc_AttributeError, l->name);
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119 return -1;
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120 }
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121 }
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122 else if (l->type != T_OBJECT) {
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123 PyErr_SetString(PyExc_TypeError,
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124 "can't delete numeric/char attribute");
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125 return -1;
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126 }
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127 }
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128 switch (l->type) {
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129 case T_BOOL:{
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130 if (!PyBool_Check(v)) {
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131 PyErr_SetString(PyExc_TypeError,
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132 "attribute value type must be bool");
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133 return -1;
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134 }
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135 if (v == Py_True)
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136 *(char*)addr = (char) 1;
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137 else
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138 *(char*)addr = (char) 0;
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139 break;
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140 }
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141 case T_BYTE:{
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142 long long_val = PyLong_AsLong(v);
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143 if ((long_val == -1) && PyErr_Occurred())
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144 return -1;
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145 *(char*)addr = (char)long_val;
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146 /* XXX: For compatibility, only warn about truncations
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147 for now. */
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148 if ((long_val > CHAR_MAX) || (long_val < CHAR_MIN))
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149 WARN("Truncation of value to char");
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150 break;
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151 }
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152 case T_UBYTE:{
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153 long long_val = PyLong_AsLong(v);
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154 if ((long_val == -1) && PyErr_Occurred())
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155 return -1;
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156 *(unsigned char*)addr = (unsigned char)long_val;
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157 if ((long_val > UCHAR_MAX) || (long_val < 0))
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158 WARN("Truncation of value to unsigned char");
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159 break;
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160 }
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161 case T_SHORT:{
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162 long long_val = PyLong_AsLong(v);
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163 if ((long_val == -1) && PyErr_Occurred())
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164 return -1;
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165 *(short*)addr = (short)long_val;
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166 if ((long_val > SHRT_MAX) || (long_val < SHRT_MIN))
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167 WARN("Truncation of value to short");
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168 break;
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169 }
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170 case T_USHORT:{
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171 long long_val = PyLong_AsLong(v);
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172 if ((long_val == -1) && PyErr_Occurred())
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173 return -1;
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174 *(unsigned short*)addr = (unsigned short)long_val;
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175 if ((long_val > USHRT_MAX) || (long_val < 0))
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176 WARN("Truncation of value to unsigned short");
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177 break;
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178 }
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179 case T_INT:{
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180 long long_val = PyLong_AsLong(v);
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181 if ((long_val == -1) && PyErr_Occurred())
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182 return -1;
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183 *(int *)addr = (int)long_val;
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184 if ((long_val > INT_MAX) || (long_val < INT_MIN))
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185 WARN("Truncation of value to int");
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186 break;
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187 }
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188 case T_UINT:{
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189 unsigned long ulong_val = PyLong_AsUnsignedLong(v);
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190 if ((ulong_val == (unsigned long)-1) && PyErr_Occurred()) {
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191 /* XXX: For compatibility, accept negative int values
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192 as well. */
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193 PyErr_Clear();
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194 ulong_val = PyLong_AsLong(v);
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195 if ((ulong_val == (unsigned long)-1) &&
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196 PyErr_Occurred())
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197 return -1;
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198 *(unsigned int *)addr = (unsigned int)ulong_val;
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199 WARN("Writing negative value into unsigned field");
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200 } else
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201 *(unsigned int *)addr = (unsigned int)ulong_val;
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202 if (ulong_val > UINT_MAX)
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203 WARN("Truncation of value to unsigned int");
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204 break;
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205 }
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206 case T_LONG:{
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207 *(long*)addr = PyLong_AsLong(v);
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208 if ((*(long*)addr == -1) && PyErr_Occurred())
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209 return -1;
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210 break;
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211 }
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212 case T_ULONG:{
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213 *(unsigned long*)addr = PyLong_AsUnsignedLong(v);
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214 if ((*(unsigned long*)addr == (unsigned long)-1)
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215 && PyErr_Occurred()) {
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216 /* XXX: For compatibility, accept negative int values
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217 as well. */
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218 PyErr_Clear();
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219 *(unsigned long*)addr = PyLong_AsLong(v);
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220 if ((*(unsigned long*)addr == (unsigned long)-1)
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221 && PyErr_Occurred())
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222 return -1;
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223 WARN("Writing negative value into unsigned field");
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224 }
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225 break;
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226 }
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227 case T_PYSSIZET:{
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228 *(Py_ssize_t*)addr = PyLong_AsSsize_t(v);
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229 if ((*(Py_ssize_t*)addr == (Py_ssize_t)-1)
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230 && PyErr_Occurred())
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231 return -1;
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232 break;
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233 }
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234 case T_FLOAT:{
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235 double double_val = PyFloat_AsDouble(v);
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236 if ((double_val == -1) && PyErr_Occurred())
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237 return -1;
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238 *(float*)addr = (float)double_val;
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239 break;
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240 }
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241 case T_DOUBLE:
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242 *(double*)addr = PyFloat_AsDouble(v);
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243 if ((*(double*)addr == -1) && PyErr_Occurred())
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244 return -1;
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245 break;
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246 case T_OBJECT:
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247 case T_OBJECT_EX:
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248 Py_XINCREF(v);
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249 oldv = *(PyObject **)addr;
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250 *(PyObject **)addr = v;
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251 Py_XDECREF(oldv);
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252 break;
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253 case T_CHAR: {
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254 char *string;
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255 Py_ssize_t len;
46644
ea594306ea85 Issue #1950: Fixed misusage of PyUnicode_AsString().
Alexandre Vassalotti <alexandre@peadrop.com>
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256
61467
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257 string = _PyUnicode_AsStringAndSize(v, &len);
78992
afe55cd04119 Fix null pointer dereferencing in structmember.c PyMember_SetOne() for T_CHAR. _PyUnicode_AsStringAndSize() can return NULL without touching the len argument. Also remove unnecessary PyUnicode_Check(), _PyUnicode_AsStringAndSize() performance the test again. CID 486815
Christian Heimes <christian@cheimes.de>
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258 if (string == NULL || len != 1) {
61467
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259 PyErr_BadArgument();
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260 return -1;
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261 }
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262 *(char*)addr = string[0];
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263 break;
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264 }
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265 case T_STRING:
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266 case T_STRING_INPLACE:
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267 PyErr_SetString(PyExc_TypeError, "readonly attribute");
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268 return -1;
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Martin v. Löwis <martin@v.loewis.de>
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269 #ifdef HAVE_LONG_LONG
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270 case T_LONGLONG:{
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271 PY_LONG_LONG value;
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272 *(PY_LONG_LONG*)addr = value = PyLong_AsLongLong(v);
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273 if ((value == -1) && PyErr_Occurred())
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274 return -1;
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275 break;
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276 }
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277 case T_ULONGLONG:{
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278 unsigned PY_LONG_LONG value;
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279 /* ??? PyLong_AsLongLong accepts an int, but PyLong_AsUnsignedLongLong
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280 doesn't ??? */
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281 if (PyLong_Check(v))
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282 *(unsigned PY_LONG_LONG*)addr = value = PyLong_AsUnsignedLongLong(v);
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283 else
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284 *(unsigned PY_LONG_LONG*)addr = value = PyLong_AsLong(v);
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285 if ((value == (unsigned PY_LONG_LONG)-1) && PyErr_Occurred())
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286 return -1;
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287 break;
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288 }
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289 #endif /* HAVE_LONG_LONG */
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290 default:
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291 PyErr_Format(PyExc_SystemError,
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292 "bad memberdescr type for %s", l->name);
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293 return -1;
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294 }
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295 return 0;
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3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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296 }