Mercurial > cpython-lru_cache-weakref

annotate Python/structmember.c @ 40898:b58a4374ac21

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Make bytes_repr return a string containing a b"" literal.
author Georg Brandl <georg@python.org>
date Sat, 24 Feb 2007 19:41:35 +0000
parents cc992d75d5b3
children b897b77a004f
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_BYTE:
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65 v = PyInt_FromLong(*(char*)addr);
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66 break;
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67 case T_UBYTE:
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68 v = PyLong_FromUnsignedLong(*(unsigned char*)addr);
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69 break;
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70 case T_SHORT:
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71 v = PyInt_FromLong(*(short*)addr);
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72 break;
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73 case T_USHORT:
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74 v = PyLong_FromUnsignedLong(*(unsigned short*)addr);
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75 break;
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76 case T_INT:
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77 v = PyInt_FromLong(*(int*)addr);
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78 break;
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79 case T_UINT:
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80 v = PyLong_FromUnsignedLong(*(unsigned int*)addr);
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81 break;
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82 case T_LONG:
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83 v = PyInt_FromLong(*(long*)addr);
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84 break;
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85 case T_ULONG:
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86 v = PyLong_FromUnsignedLong(*(unsigned long*)addr);
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87 break;
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88 case T_FLOAT:
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89 v = PyFloat_FromDouble((double)*(float*)addr);
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90 break;
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91 case T_DOUBLE:
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92 v = PyFloat_FromDouble(*(double*)addr);
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93 break;
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94 case T_STRING:
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95 if (*(char**)addr == NULL) {
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96 Py_INCREF(Py_None);
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97 v = Py_None;
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98 }
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99 else
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100 v = PyString_FromString(*(char**)addr);
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101 break;
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102 case T_STRING_INPLACE:
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103 v = PyString_FromString((char*)addr);
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104 break;
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105 case T_CHAR:
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106 v = PyString_FromStringAndSize((char*)addr, 1);
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107 break;
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108 case T_OBJECT:
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109 v = *(PyObject **)addr;
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110 if (v == NULL)
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111 v = Py_None;
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112 Py_INCREF(v);
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113 break;
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114 case T_OBJECT_EX:
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115 v = *(PyObject **)addr;
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116 if (v == NULL)
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117 PyErr_SetString(PyExc_AttributeError, l->name);
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118 Py_XINCREF(v);
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119 break;
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120 #ifdef HAVE_LONG_LONG
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121 case T_LONGLONG:
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122 v = PyLong_FromLongLong(*(PY_LONG_LONG *)addr);
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123 break;
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124 case T_ULONGLONG:
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125 v = PyLong_FromUnsignedLongLong(*(unsigned PY_LONG_LONG *)addr);
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126 break;
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127 #endif /* HAVE_LONG_LONG */
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128 case T_NONE:
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129 v = Py_None;
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130 Py_INCREF(v);
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131 break;
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132 default:
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133 PyErr_SetString(PyExc_SystemError, "bad memberdescr type");
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134 v = NULL;
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135 }
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136 return v;
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137 }
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138
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139 int
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140 PyMember_Set(char *addr, struct memberlist *mlist, const char *name, PyObject *v)
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141 {
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142 struct memberlist *l;
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143
86
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144 for (l = mlist; l->name != NULL; l++) {
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145 if (strcmp(l->name, name) == 0) {
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146 PyMemberDef copy;
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147 copy.name = l->name;
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148 copy.type = l->type;
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149 copy.offset = l->offset;
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150 copy.flags = l->flags;
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151 copy.doc = NULL;
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152 return PyMember_SetOne(addr, &copy, v);
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153 }
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154 }
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155
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5880384d7c71 Quickly renamed the remaining files -- this directory is done.
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156 PyErr_SetString(PyExc_AttributeError, name);
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a5bf7d5959ce Return -1 for errors.
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157 return -1;
86
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158 }
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159
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160 int
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161 PyMember_SetOne(char *addr, PyMemberDef *l, PyObject *v)
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162 {
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163 PyObject *oldv;
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164
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86fdf8fe7f17 Getting rid of all the code inside #ifdef macintosh too.
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165 if ((l->flags & READONLY) || l->type == T_STRING)
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166 {
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167 PyErr_SetString(PyExc_TypeError, "readonly attribute");
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168 return -1;
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169 }
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170 if ((l->flags & WRITE_RESTRICTED) && PyEval_GetRestricted()) {
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171 PyErr_SetString(PyExc_RuntimeError, "restricted attribute");
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172 return -1;
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173 }
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ef6f692c76e2 Fix SF bug #486144: Uninitialized __slot__ vrbl is None.
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174 if (v == NULL && l->type != T_OBJECT_EX && l->type != T_OBJECT) {
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175 PyErr_SetString(PyExc_TypeError,
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176 "can't delete numeric/char attribute");
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177 return -1;
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178 }
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179 addr += l->offset;
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180 switch (l->type) {
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181 case T_BYTE:{
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182 long long_val;
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183 long_val = PyInt_AsLong(v);
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184 if ((long_val == -1) && PyErr_Occurred())
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185 return -1;
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186 /* XXX: For compatibility, only warn about truncations
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187 for now. */
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188 if ((long_val > CHAR_MAX) || (long_val < CHAR_MIN))
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189 PyErr_Warn(PyExc_RuntimeWarning, "Truncation of value to char");
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190 *(char*)addr = (char)long_val;
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191 break;
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192 }
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193 case T_UBYTE:{
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194 long long_val;
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195 long_val = PyInt_AsLong(v);
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196 if ((long_val == -1) && PyErr_Occurred())
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197 return -1;
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198 if ((long_val > UCHAR_MAX) || (long_val < 0))
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199 PyErr_Warn(PyExc_RuntimeWarning, "Truncation of value to unsigned char");
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200 *(unsigned char*)addr = (unsigned char)long_val;
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201 break;
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202 }
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203 case T_SHORT:{
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204 long long_val;
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205 long_val = PyInt_AsLong(v);
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206 if ((long_val == -1) && PyErr_Occurred())
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207 return -1;
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208 if ((long_val > SHRT_MAX) || (long_val < SHRT_MIN))
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209 PyErr_Warn(PyExc_RuntimeWarning, "Truncation of value to short");
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210 *(short*)addr = (short)long_val;
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211 break;
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diff changeset
212 }
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213 case T_USHORT:{
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214 long long_val;
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215 long_val = PyInt_AsLong(v);
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216 if ((long_val == -1) && PyErr_Occurred())
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diff changeset
217 return -1;
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diff changeset
218 if ((long_val > USHRT_MAX) || (long_val < 0))
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diff changeset
219 PyErr_Warn(PyExc_RuntimeWarning, "Truncation of value to unsigned short");
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220 *(unsigned short*)addr = (unsigned short)long_val;
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diff changeset
221 break;
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diff changeset
222 }
40450
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223 case T_INT:{
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224 long long_val;
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225 long_val = PyInt_AsLong(v);
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226 if ((long_val == -1) && PyErr_Occurred())
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diff changeset
227 return -1;
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diff changeset
228 if ((long_val > INT_MAX) || (long_val < INT_MIN))
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diff changeset
229 PyErr_Warn(PyExc_RuntimeWarning, "Truncation of value to int");
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diff changeset
230 *(int *)addr = (int)long_val;
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diff changeset
231 break;
40450
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diff changeset
232 }
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diff changeset
233 case T_UINT:{
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diff changeset
234 unsigned long ulong_val;
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diff changeset
235 ulong_val = PyLong_AsUnsignedLong(v);
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diff changeset
236 if ((ulong_val == (unsigned int)-1) && PyErr_Occurred()) {
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diff changeset
237 /* XXX: For compatibility, accept negative int values
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diff changeset
238 as well. */
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diff changeset
239 PyErr_Clear();
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diff changeset
240 ulong_val = PyLong_AsLong(v);
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diff changeset
241 if ((ulong_val == (unsigned int)-1) && PyErr_Occurred())
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diff changeset
242 return -1;
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diff changeset
243 PyErr_Warn(PyExc_RuntimeWarning, "Writing negative value into unsigned field");
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diff changeset
244 }
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diff changeset
245 if (ulong_val > UINT_MAX)
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diff changeset
246 PyErr_Warn(PyExc_RuntimeWarning, "Truncation of value to unsigned int");
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247 *(unsigned int *)addr = (unsigned int)ulong_val;
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diff changeset
248 break;
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diff changeset
249 }
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diff changeset
250 case T_LONG:{
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diff changeset
251 *(long*)addr = PyLong_AsLong(v);
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diff changeset
252 if ((*(long*)addr == -1) && PyErr_Occurred())
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diff changeset
253 return -1;
40450
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diff changeset
254 break;
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diff changeset
255 }
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diff changeset
256 case T_ULONG:{
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diff changeset
257 *(unsigned long*)addr = PyLong_AsUnsignedLong(v);
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diff changeset
258 if ((*(unsigned long*)addr == (unsigned long)-1)
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diff changeset
259 && PyErr_Occurred()) {
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diff changeset
260 /* XXX: For compatibility, accept negative int values
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diff changeset
261 as well. */
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diff changeset
262 PyErr_Clear();
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diff changeset
263 *(unsigned long*)addr = PyLong_AsLong(v);
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diff changeset
264 if ((*(unsigned long*)addr == (unsigned int)-1) && PyErr_Occurred())
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diff changeset
265 return -1;
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diff changeset
266 PyErr_Warn(PyExc_RuntimeWarning, "Writing negative value into unsigned field");
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diff changeset
267 }
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diff changeset
268 break;
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diff changeset
269 }
40450
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diff changeset
270 case T_FLOAT:{
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diff changeset
271 double double_val;
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272 double_val = PyFloat_AsDouble(v);
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diff changeset
273 if ((double_val == -1) && PyErr_Occurred())
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diff changeset
274 return -1;
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275 *(float*)addr = (float)double_val;
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diff changeset
276 break;
40450
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277 }
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diff changeset
278 case T_DOUBLE:
40450
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279 *(double*)addr = PyFloat_AsDouble(v);
cc992d75d5b3 Four months of trunk changes (including a few releases...)
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280 if ((*(double*)addr == -1) && PyErr_Occurred())
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281 return -1;
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282 break;
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283 case T_OBJECT:
21187
ef6f692c76e2 Fix SF bug #486144: Uninitialized __slot__ vrbl is None.
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284 case T_OBJECT_EX:
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285 Py_XINCREF(v);
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286 oldv = *(PyObject **)addr;
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287 *(PyObject **)addr = v;
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288 Py_XDECREF(oldv);
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289 break;
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290 case T_CHAR:
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291 if (PyString_Check(v) && PyString_Size(v) == 1) {
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292 *(char*)addr = PyString_AsString(v)[0];
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293 }
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294 else {
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295 PyErr_BadArgument();
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296 return -1;
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297 }
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298 break;
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e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
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299 #ifdef HAVE_LONG_LONG
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300 case T_LONGLONG:
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301 if (!PyLong_Check(v)) {
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302 PyErr_BadArgument();
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303 return -1;
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diff changeset
304 } else {
38453
29ae5e0fc348 Much-needed merge (using svnmerge.py this time) of trunk changes into p3yk.
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parents: 36114
diff changeset
305 PY_LONG_LONG value;
29ae5e0fc348 Much-needed merge (using svnmerge.py this time) of trunk changes into p3yk.
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diff changeset
306 *(PY_LONG_LONG*)addr = value = PyLong_AsLongLong(v);
29ae5e0fc348 Much-needed merge (using svnmerge.py this time) of trunk changes into p3yk.
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parents: 36114
diff changeset
307 if ((value == -1) && PyErr_Occurred()) {
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308 return -1;
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diff changeset
309 }
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310 }
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
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diff changeset
311 break;
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diff changeset
312 case T_ULONGLONG:
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diff changeset
313 if (!PyLong_Check(v)) {
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314 PyErr_BadArgument();
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315 return -1;
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diff changeset
316 } else {
38453
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parents: 36114
diff changeset
317 unsigned PY_LONG_LONG value;
29ae5e0fc348 Much-needed merge (using svnmerge.py this time) of trunk changes into p3yk.
Thomas Wouters <thomas@python.org>
parents: 36114
diff changeset
318 *(unsigned PY_LONG_LONG*)addr = value = PyLong_AsUnsignedLongLong(v);
29ae5e0fc348 Much-needed merge (using svnmerge.py this time) of trunk changes into p3yk.
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diff changeset
319 if ((value == (unsigned PY_LONG_LONG)-1) &&
29ae5e0fc348 Much-needed merge (using svnmerge.py this time) of trunk changes into p3yk.
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diff changeset
320 PyErr_Occurred()) {
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diff changeset
321 return -1;
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diff changeset
322 }
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diff changeset
323 }
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
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diff changeset
324 break;
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diff changeset
325 #endif /* HAVE_LONG_LONG */
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diff changeset
326 default:
20456
bff6c2d76f33 Put descr name in "bad memberdescr type" error message.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 20012
diff changeset
327 PyErr_Format(PyExc_SystemError,
bff6c2d76f33 Put descr name in "bad memberdescr type" error message.
Jeremy Hylton <jeremy@alum.mit.edu>
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diff changeset
328 "bad memberdescr type for %s", l->name);
20012
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329 return -1;
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diff changeset
330 }
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331 return 0;
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diff changeset
332 }