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annotate Python/structmember.c @ 58765:2ba7677bfa95 legacy-trunk

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testCopysign was defined twice in test_math; combine the definitions
author Mark Dickinson <dickinsm@gmail.com>
date Sat, 06 Feb 2010 23:11:25 +0000
parents 96a2371b114b
children 66b60a6e8198 e808fc548cd6
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 static PyObject *
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9 listmembers(struct memberlist *mlist)
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10 {
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11 int i, n;
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12 PyObject *v;
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13 for (n = 0; mlist[n].name != NULL; n++)
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14 ;
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15 v = PyList_New(n);
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16 if (v != NULL) {
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17 for (i = 0; i < n; i++)
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18 PyList_SetItem(v, i,
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19 PyString_FromString(mlist[i].name));
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20 if (PyErr_Occurred()) {
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21 Py_DECREF(v);
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22 v = NULL;
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23 }
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24 else {
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25 PyList_Sort(v);
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26 }
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27 }
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28 return v;
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29 }
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30
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31 PyObject *
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32 PyMember_Get(const char *addr, struct memberlist *mlist, const char *name)
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33 {
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34 struct memberlist *l;
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35
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36 if (strcmp(name, "__members__") == 0)
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37 return listmembers(mlist);
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38 for (l = mlist; l->name != NULL; l++) {
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39 if (strcmp(l->name, name) == 0) {
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40 PyMemberDef copy;
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41 copy.name = l->name;
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42 copy.type = l->type;
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43 copy.offset = l->offset;
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44 copy.flags = l->flags;
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45 copy.doc = NULL;
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46 return PyMember_GetOne(addr, &copy);
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47 }
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48 }
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49 PyErr_SetString(PyExc_AttributeError, name);
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50 return NULL;
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51 }
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52
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53 PyObject *
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54 PyMember_GetOne(const char *addr, PyMemberDef *l)
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55 {
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56 PyObject *v;
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57 if ((l->flags & READ_RESTRICTED) &&
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58 PyEval_GetRestricted()) {
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59 PyErr_SetString(PyExc_RuntimeError, "restricted attribute");
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60 return NULL;
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61 }
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62 addr += l->offset;
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63 switch (l->type) {
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64 case T_BOOL:
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65 v = PyBool_FromLong(*(char*)addr);
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66 break;
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67 case T_BYTE:
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68 v = PyInt_FromLong(*(char*)addr);
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69 break;
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70 case T_UBYTE:
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71 v = PyLong_FromUnsignedLong(*(unsigned char*)addr);
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72 break;
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73 case T_SHORT:
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74 v = PyInt_FromLong(*(short*)addr);
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75 break;
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76 case T_USHORT:
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77 v = PyLong_FromUnsignedLong(*(unsigned short*)addr);
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78 break;
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79 case T_INT:
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80 v = PyInt_FromLong(*(int*)addr);
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81 break;
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82 case T_UINT:
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83 v = PyLong_FromUnsignedLong(*(unsigned int*)addr);
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84 break;
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85 case T_LONG:
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86 v = PyInt_FromLong(*(long*)addr);
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87 break;
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88 case T_ULONG:
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89 v = PyLong_FromUnsignedLong(*(unsigned long*)addr);
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90 break;
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91 case T_PYSSIZET:
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92 v = PyInt_FromSsize_t(*(Py_ssize_t*)addr);
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93 break;
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94 case T_FLOAT:
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95 v = PyFloat_FromDouble((double)*(float*)addr);
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96 break;
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97 case T_DOUBLE:
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98 v = PyFloat_FromDouble(*(double*)addr);
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99 break;
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100 case T_STRING:
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101 if (*(char**)addr == NULL) {
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102 Py_INCREF(Py_None);
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103 v = Py_None;
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104 }
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105 else
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106 v = PyString_FromString(*(char**)addr);
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107 break;
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108 case T_STRING_INPLACE:
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109 v = PyString_FromString((char*)addr);
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110 break;
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111 case T_CHAR:
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112 v = PyString_FromStringAndSize((char*)addr, 1);
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113 break;
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114 case T_OBJECT:
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115 v = *(PyObject **)addr;
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116 if (v == NULL)
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117 v = Py_None;
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118 Py_INCREF(v);
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119 break;
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120 case T_OBJECT_EX:
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121 v = *(PyObject **)addr;
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122 if (v == NULL)
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123 PyErr_SetString(PyExc_AttributeError, l->name);
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124 Py_XINCREF(v);
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125 break;
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126 #ifdef HAVE_LONG_LONG
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127 case T_LONGLONG:
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128 v = PyLong_FromLongLong(*(PY_LONG_LONG *)addr);
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129 break;
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130 case T_ULONGLONG:
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131 v = PyLong_FromUnsignedLongLong(*(unsigned PY_LONG_LONG *)addr);
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132 break;
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133 #endif /* HAVE_LONG_LONG */
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134 default:
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135 PyErr_SetString(PyExc_SystemError, "bad memberdescr type");
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136 v = NULL;
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137 }
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138 return v;
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139 }
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140
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141 int
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142 PyMember_Set(char *addr, struct memberlist *mlist, const char *name, PyObject *v)
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143 {
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144 struct memberlist *l;
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145
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146 for (l = mlist; l->name != NULL; l++) {
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147 if (strcmp(l->name, name) == 0) {
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148 PyMemberDef copy;
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149 copy.name = l->name;
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150 copy.type = l->type;
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151 copy.offset = l->offset;
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152 copy.flags = l->flags;
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153 copy.doc = NULL;
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154 return PyMember_SetOne(addr, &copy, v);
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155 }
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156 }
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157
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158 PyErr_SetString(PyExc_AttributeError, name);
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159 return -1;
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160 }
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161
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162 #define WARN(msg) \
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163 do { \
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164 if (PyErr_Warn(PyExc_RuntimeWarning, msg) < 0) \
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165 return -1; \
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166 } while (0)
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167
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168 int
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169 PyMember_SetOne(char *addr, PyMemberDef *l, PyObject *v)
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170 {
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171 PyObject *oldv;
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172
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173 addr += l->offset;
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174
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175 if ((l->flags & READONLY) || l->type == T_STRING)
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176 {
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177 PyErr_SetString(PyExc_TypeError, "readonly attribute");
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178 return -1;
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179 }
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180 if ((l->flags & PY_WRITE_RESTRICTED) && PyEval_GetRestricted()) {
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181 PyErr_SetString(PyExc_RuntimeError, "restricted attribute");
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182 return -1;
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183 }
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184 if (v == NULL) {
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185 if (l->type == T_OBJECT_EX) {
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186 /* Check if the attribute is set. */
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187 if (*(PyObject **)addr == NULL) {
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188 PyErr_SetString(PyExc_AttributeError, l->name);
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189 return -1;
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190 }
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191 }
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192 else if (l->type != T_OBJECT) {
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193 PyErr_SetString(PyExc_TypeError,
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194 "can't delete numeric/char attribute");
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195 return -1;
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196 }
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197 }
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198 switch (l->type) {
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199 case T_BOOL:{
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200 if (!PyBool_Check(v)) {
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201 PyErr_SetString(PyExc_TypeError,
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202 "attribute value type must be bool");
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203 return -1;
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204 }
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205 if (v == Py_True)
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206 *(char*)addr = (char) 1;
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207 else
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208 *(char*)addr = (char) 0;
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209 break;
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210 }
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211 case T_BYTE:{
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212 long long_val = PyInt_AsLong(v);
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213 if ((long_val == -1) && PyErr_Occurred())
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214 return -1;
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215 *(char*)addr = (char)long_val;
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216 /* XXX: For compatibility, only warn about truncations
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217 for now. */
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218 if ((long_val > CHAR_MAX) || (long_val < CHAR_MIN))
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219 WARN("Truncation of value to char");
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220 break;
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221 }
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222 case T_UBYTE:{
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223 long long_val = PyInt_AsLong(v);
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224 if ((long_val == -1) && PyErr_Occurred())
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225 return -1;
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226 *(unsigned char*)addr = (unsigned char)long_val;
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227 if ((long_val > UCHAR_MAX) || (long_val < 0))
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228 WARN("Truncation of value to unsigned char");
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229 break;
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230 }
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231 case T_SHORT:{
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232 long long_val = PyInt_AsLong(v);
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233 if ((long_val == -1) && PyErr_Occurred())
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234 return -1;
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235 *(short*)addr = (short)long_val;
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236 if ((long_val > SHRT_MAX) || (long_val < SHRT_MIN))
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237 WARN("Truncation of value to short");
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238 break;
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239 }
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240 case T_USHORT:{
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241 long long_val = PyInt_AsLong(v);
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242 if ((long_val == -1) && PyErr_Occurred())
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243 return -1;
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244 *(unsigned short*)addr = (unsigned short)long_val;
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245 if ((long_val > USHRT_MAX) || (long_val < 0))
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246 WARN("Truncation of value to unsigned short");
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247 break;
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248 }
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249 case T_INT:{
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250 long long_val = PyInt_AsLong(v);
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251 if ((long_val == -1) && PyErr_Occurred())
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252 return -1;
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253 *(int *)addr = (int)long_val;
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254 if ((long_val > INT_MAX) || (long_val < INT_MIN))
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255 WARN("Truncation of value to int");
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256 break;
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257 }
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258 case T_UINT:{
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259 unsigned long ulong_val = PyLong_AsUnsignedLong(v);
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260 if ((ulong_val == (unsigned int)-1) && PyErr_Occurred()) {
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261 /* XXX: For compatibility, accept negative int values
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262 as well. */
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263 PyErr_Clear();
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264 ulong_val = PyLong_AsLong(v);
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265 if ((ulong_val == (unsigned int)-1) && PyErr_Occurred())
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266 return -1;
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267 *(unsigned int *)addr = (unsigned int)ulong_val;
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268 WARN("Writing negative value into unsigned field");
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269 } else
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270 *(unsigned int *)addr = (unsigned int)ulong_val;
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271 if (ulong_val > UINT_MAX)
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272 WARN("Truncation of value to unsigned int");
40176
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273 break;
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 38024
diff changeset
274 }
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
Martin v. Löwis <martin@v.loewis.de>
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diff changeset
275 case T_LONG:{
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
Martin v. Löwis <martin@v.loewis.de>
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276 *(long*)addr = PyLong_AsLong(v);
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
Martin v. Löwis <martin@v.loewis.de>
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diff changeset
277 if ((*(long*)addr == -1) && PyErr_Occurred())
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diff changeset
278 return -1;
40176
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diff changeset
279 break;
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
Martin v. Löwis <martin@v.loewis.de>
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diff changeset
280 }
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
Martin v. Löwis <martin@v.loewis.de>
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diff changeset
281 case T_ULONG:{
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diff changeset
282 *(unsigned long*)addr = PyLong_AsUnsignedLong(v);
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
Martin v. Löwis <martin@v.loewis.de>
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diff changeset
283 if ((*(unsigned long*)addr == (unsigned long)-1)
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Martin v. Löwis <martin@v.loewis.de>
parents: 38024
diff changeset
284 && PyErr_Occurred()) {
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Martin v. Löwis <martin@v.loewis.de>
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285 /* XXX: For compatibility, accept negative int values
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diff changeset
286 as well. */
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Martin v. Löwis <martin@v.loewis.de>
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287 PyErr_Clear();
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Martin v. Löwis <martin@v.loewis.de>
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288 *(unsigned long*)addr = PyLong_AsLong(v);
42454
648577cc688a Handle errors when generating a warning.
Neal Norwitz <nnorwitz@gmail.com>
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289 if ((*(unsigned long*)addr == (unsigned int)-1)
648577cc688a Handle errors when generating a warning.
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parents: 42083
diff changeset
290 && PyErr_Occurred())
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291 return -1;
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648577cc688a Handle errors when generating a warning.
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292 WARN("Writing negative value into unsigned field");
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293 }
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Guido van Rossum <guido@python.org>
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294 break;
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Guido van Rossum <guido@python.org>
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diff changeset
295 }
42083
37189e375ec7 Add T_PYSSIZET in structmember.h: This can be used for
Walter Dörwald <walter@livinglogic.de>
parents: 42007
diff changeset
296 case T_PYSSIZET:{
37189e375ec7 Add T_PYSSIZET in structmember.h: This can be used for
Walter Dörwald <walter@livinglogic.de>
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diff changeset
297 *(Py_ssize_t*)addr = PyInt_AsSsize_t(v);
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Walter Dörwald <walter@livinglogic.de>
parents: 42007
diff changeset
298 if ((*(Py_ssize_t*)addr == (Py_ssize_t)-1)
37189e375ec7 Add T_PYSSIZET in structmember.h: This can be used for
Walter Dörwald <walter@livinglogic.de>
parents: 42007
diff changeset
299 && PyErr_Occurred())
37189e375ec7 Add T_PYSSIZET in structmember.h: This can be used for
Walter Dörwald <walter@livinglogic.de>
parents: 42007
diff changeset
300 return -1;
37189e375ec7 Add T_PYSSIZET in structmember.h: This can be used for
Walter Dörwald <walter@livinglogic.de>
parents: 42007
diff changeset
301 break;
37189e375ec7 Add T_PYSSIZET in structmember.h: This can be used for
Walter Dörwald <walter@livinglogic.de>
parents: 42007
diff changeset
302 }
40176
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diff changeset
303 case T_FLOAT:{
42454
648577cc688a Handle errors when generating a warning.
Neal Norwitz <nnorwitz@gmail.com>
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diff changeset
304 double double_val = PyFloat_AsDouble(v);
40176
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parents: 38024
diff changeset
305 if ((double_val == -1) && PyErr_Occurred())
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
Martin v. Löwis <martin@v.loewis.de>
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diff changeset
306 return -1;
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Martin v. Löwis <martin@v.loewis.de>
parents: 38024
diff changeset
307 *(float*)addr = (float)double_val;
20012
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Guido van Rossum <guido@python.org>
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diff changeset
308 break;
40176
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Martin v. Löwis <martin@v.loewis.de>
parents: 38024
diff changeset
309 }
20012
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Guido van Rossum <guido@python.org>
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diff changeset
310 case T_DOUBLE:
40176
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parents: 38024
diff changeset
311 *(double*)addr = PyFloat_AsDouble(v);
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 38024
diff changeset
312 if ((*(double*)addr == -1) && PyErr_Occurred())
20012
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Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
313 return -1;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
314 break;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
315 case T_OBJECT:
21187
ef6f692c76e2 Fix SF bug #486144: Uninitialized __slot__ vrbl is None.
Guido van Rossum <guido@python.org>
parents: 20456
diff changeset
316 case T_OBJECT_EX:
20012
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Guido van Rossum <guido@python.org>
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diff changeset
317 Py_XINCREF(v);
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
318 oldv = *(PyObject **)addr;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
319 *(PyObject **)addr = v;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
320 Py_XDECREF(oldv);
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
321 break;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
322 case T_CHAR:
47527
52294af4b663 This reverts r63675 based on the discussion in this thread:
Gregory P. Smith <greg@mad-scientist.com>
parents: 47294
diff changeset
323 if (PyString_Check(v) && PyString_Size(v) == 1) {
52294af4b663 This reverts r63675 based on the discussion in this thread:
Gregory P. Smith <greg@mad-scientist.com>
parents: 47294
diff changeset
324 *(char*)addr = PyString_AsString(v)[0];
20012
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
325 }
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
326 else {
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
327 PyErr_BadArgument();
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
328 return -1;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
329 }
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
330 break;
34677
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
331 #ifdef HAVE_LONG_LONG
42007
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
332 case T_LONGLONG:{
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
333 PY_LONG_LONG value;
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
334 *(PY_LONG_LONG*)addr = value = PyLong_AsLongLong(v);
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
335 if ((value == -1) && PyErr_Occurred())
34677
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
336 return -1;
42007
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
337 break;
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
338 }
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
339 case T_ULONGLONG:{
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
340 unsigned PY_LONG_LONG value;
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
341 /* ??? PyLong_AsLongLong accepts an int, but PyLong_AsUnsignedLongLong
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
342 doesn't ??? */
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
343 if (PyLong_Check(v))
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
344 *(unsigned PY_LONG_LONG*)addr = value = PyLong_AsUnsignedLongLong(v);
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
345 else
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
346 *(unsigned PY_LONG_LONG*)addr = value = PyInt_AsLong(v);
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
347 if ((value == (unsigned PY_LONG_LONG)-1) && PyErr_Occurred())
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
348 return -1;
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
349 break;
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
350 }
34677
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
351 #endif /* HAVE_LONG_LONG */
20012
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
352 default:
20456
bff6c2d76f33 Put descr name in "bad memberdescr type" error message.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 20012
diff changeset
353 PyErr_Format(PyExc_SystemError,
bff6c2d76f33 Put descr name in "bad memberdescr type" error message.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 20012
diff changeset
354 "bad memberdescr type for %s", l->name);
20012
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
355 return -1;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
356 }
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
357 return 0;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
358 }