Mercurial > cpython-lru_cache-weakref

annotate Python/structmember.c @ 20492:bf4ff05eab52 legacy-trunk

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
For debug build, check that the stack pointer never exceeds the stack size.
author Jeremy Hylton <jeremy@alum.mit.edu>
date Wed, 17 Oct 2001 13:29:30 +0000
parents bff6c2d76f33
children ef6f692c76e2
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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(char *addr, struct memberlist *mlist, 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(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(
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66 (long) (((*(char*)addr & 0xff) ^ 0x80) - 0x80));
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67 break;
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68 case T_UBYTE:
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69 v = PyInt_FromLong((long) *(char*)addr & 0xff);
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70 break;
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71 case T_SHORT:
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72 v = PyInt_FromLong((long) *(short*)addr);
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73 break;
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74 case T_USHORT:
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75 v = PyInt_FromLong((long) *(unsigned short*)addr);
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76 break;
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77 case T_INT:
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78 v = PyInt_FromLong((long) *(int*)addr);
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79 break;
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80 case T_UINT:
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81 v = PyInt_FromLong((long) *(unsigned int*)addr);
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82 break;
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83 case T_LONG:
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84 v = PyInt_FromLong(*(long*)addr);
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85 break;
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86 case T_ULONG:
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87 v = PyLong_FromDouble((double) *(unsigned long*)addr);
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88 break;
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89 case T_FLOAT:
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90 v = PyFloat_FromDouble((double)*(float*)addr);
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91 break;
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92 case T_DOUBLE:
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93 v = PyFloat_FromDouble(*(double*)addr);
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94 break;
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95 case T_STRING:
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96 if (*(char**)addr == NULL) {
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97 Py_INCREF(Py_None);
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98 v = Py_None;
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99 }
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100 else
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101 v = PyString_FromString(*(char**)addr);
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102 break;
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103 case T_STRING_INPLACE:
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104 v = PyString_FromString((char*)addr);
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105 break;
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106 #ifdef macintosh
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107 case T_PSTRING:
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108 if (*(char**)addr == NULL) {
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109 Py_INCREF(Py_None);
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110 v = Py_None;
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111 }
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112 else
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113 v = PyString_FromStringAndSize(
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114 (*(char**)addr)+1,
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115 **(unsigned char**)addr);
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116 break;
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117 case T_PSTRING_INPLACE:
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118 v = PyString_FromStringAndSize(
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119 ((char*)addr)+1,
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120 *(unsigned char*)addr);
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121 break;
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122 #endif /* macintosh */
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123 case T_CHAR:
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124 v = PyString_FromStringAndSize((char*)addr, 1);
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125 break;
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126 case T_OBJECT:
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127 v = *(PyObject **)addr;
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128 if (v == NULL)
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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, char *name, PyObject *v)
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141 {
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142 struct memberlist *l;
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143
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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);
86
a6934380c6e7 "Compiling" version
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153 }
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154 }
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155
5373
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
a6934380c6e7 "Compiling" version
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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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165 if ((l->flags & READONLY) || l->type == T_STRING
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166 #ifdef macintosh
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167 || l->type == T_PSTRING
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168 #endif
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169 )
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170 {
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171 PyErr_SetString(PyExc_TypeError, "readonly attribute");
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172 return -1;
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173 }
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174 if ((l->flags & WRITE_RESTRICTED) && PyEval_GetRestricted()) {
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175 PyErr_SetString(PyExc_RuntimeError, "restricted attribute");
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176 return -1;
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177 }
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178 if (v == NULL && l->type != T_OBJECT) {
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179 PyErr_SetString(PyExc_TypeError,
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180 "can't delete numeric/char attribute");
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181 return -1;
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182 }
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183 addr += l->offset;
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184 switch (l->type) {
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185 case T_BYTE:
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186 case T_UBYTE:
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187 if (!PyInt_Check(v)) {
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188 PyErr_BadArgument();
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189 return -1;
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190 }
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191 *(char*)addr = (char) PyInt_AsLong(v);
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192 break;
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193 case T_SHORT:
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194 case T_USHORT:
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195 if (!PyInt_Check(v)) {
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196 PyErr_BadArgument();
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197 return -1;
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198 }
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199 *(short*)addr = (short) PyInt_AsLong(v);
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200 break;
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201 case T_UINT:
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202 case T_INT:
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203 if (!PyInt_Check(v)) {
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204 PyErr_BadArgument();
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205 return -1;
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206 }
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207 *(int*)addr = (int) PyInt_AsLong(v);
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208 break;
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209 case T_LONG:
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210 if (!PyInt_Check(v)) {
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211 PyErr_BadArgument();
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212 return -1;
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213 }
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214 *(long*)addr = PyInt_AsLong(v);
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215 break;
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216 case T_ULONG:
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diff changeset
217 if (PyInt_Check(v))
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218 *(long*)addr = PyInt_AsLong(v);
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219 else if (PyLong_Check(v))
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220 *(long*)addr = PyLong_AsLong(v);
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diff changeset
221 else {
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diff changeset
222 PyErr_BadArgument();
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diff changeset
223 return -1;
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diff changeset
224 }
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
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diff changeset
225 break;
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diff changeset
226 case T_FLOAT:
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diff changeset
227 if (PyInt_Check(v))
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228 *(float*)addr =
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
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229 (float) PyInt_AsLong(v);
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Guido van Rossum <guido@python.org>
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diff changeset
230 else if (PyFloat_Check(v))
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diff changeset
231 *(float*)addr =
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diff changeset
232 (float) PyFloat_AsDouble(v);
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Guido van Rossum <guido@python.org>
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diff changeset
233 else {
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
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diff changeset
234 PyErr_BadArgument();
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
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diff changeset
235 return -1;
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Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
236 }
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
237 break;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
238 case T_DOUBLE:
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Guido van Rossum <guido@python.org>
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diff changeset
239 if (PyInt_Check(v))
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
240 *(double*)addr = (double) PyInt_AsLong(v);
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
241 else if (PyFloat_Check(v))
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
242 *(double*)addr = PyFloat_AsDouble(v);
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
243 else {
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
244 PyErr_BadArgument();
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
245 return -1;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
246 }
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
247 break;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
248 case T_OBJECT:
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
249 Py_XINCREF(v);
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
250 oldv = *(PyObject **)addr;
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Guido van Rossum <guido@python.org>
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diff changeset
251 *(PyObject **)addr = v;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
252 Py_XDECREF(oldv);
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
253 break;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
254 case T_CHAR:
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Guido van Rossum <guido@python.org>
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diff changeset
255 if (PyString_Check(v) && PyString_Size(v) == 1) {
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Guido van Rossum <guido@python.org>
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diff changeset
256 *(char*)addr = PyString_AsString(v)[0];
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Guido van Rossum <guido@python.org>
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diff changeset
257 }
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
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parents: 19942
diff changeset
258 else {
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diff changeset
259 PyErr_BadArgument();
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
260 return -1;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
261 }
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
262 break;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
263 default:
20456
bff6c2d76f33 Put descr name in "bad memberdescr type" error message.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 20012
diff changeset
264 PyErr_Format(PyExc_SystemError,
bff6c2d76f33 Put descr name in "bad memberdescr type" error message.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 20012
diff changeset
265 "bad memberdescr type for %s", l->name);
20012
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
266 return -1;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
267 }
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
268 return 0;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
269 }