Mercurial > cpython-lru_cache-weakref

annotate Python/structmember.c @ 13256:87ee82e5c56d legacy-trunk

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Change copyright notice - 2nd try.
author Guido van Rossum <guido@python.org>
date Fri, 30 Jun 2000 23:58:06 +0000
parents 916fb024ce94
children f79434ee41fa
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1 /***********************************************************
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2 Copyright (c) 2000, BeOpen.com.
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3 Copyright (c) 1995-2000, Corporation for National Research Initiatives.
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4 Copyright (c) 1990-1995, Stichting Mathematisch Centrum.
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5 All rights reserved.
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6
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7 See the file "Misc/COPYRIGHT" for information on usage and
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8 redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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9 ******************************************************************/
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10
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11 /* Map C struct members to Python object attributes */
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12
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13 #include "Python.h"
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14
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15 #include "structmember.h"
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16
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17 static PyObject *
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18 listmembers(mlist)
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19 struct memberlist *mlist;
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20 {
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21 int i, n;
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22 PyObject *v;
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23 for (n = 0; mlist[n].name != NULL; n++)
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24 ;
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25 v = PyList_New(n);
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26 if (v != NULL) {
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27 for (i = 0; i < n; i++)
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28 PyList_SetItem(v, i,
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29 PyString_FromString(mlist[i].name));
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30 if (PyErr_Occurred()) {
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31 Py_DECREF(v);
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32 v = NULL;
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33 }
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34 else {
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35 PyList_Sort(v);
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36 }
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37 }
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38 return v;
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39 }
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40
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41 PyObject *
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42 PyMember_Get(addr, mlist, name)
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43 char *addr;
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44 struct memberlist *mlist;
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45 char *name;
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46 {
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47 struct memberlist *l;
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48
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49 if (strcmp(name, "__members__") == 0)
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50 return listmembers(mlist);
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51 for (l = mlist; l->name != NULL; l++) {
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52 if (strcmp(l->name, name) == 0) {
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53 PyObject *v;
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54 addr += l->offset;
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55 switch (l->type) {
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56 case T_BYTE:
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57 v = PyInt_FromLong((long)
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58 (((*(char*)addr & 0xff)
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59 ^ 0x80) - 0x80));
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60 break;
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61 case T_UBYTE:
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62 v = PyInt_FromLong((long) *(char*)addr & 0xff);
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63 break;
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64 case T_SHORT:
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65 v = PyInt_FromLong((long) *(short*)addr);
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66 break;
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67 case T_USHORT:
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68 v = PyInt_FromLong((long)
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69 *(unsigned short*)addr);
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70 break;
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71 case T_INT:
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72 v = PyInt_FromLong((long) *(int*)addr);
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73 break;
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74 case T_UINT:
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75 v = PyInt_FromLong((long)
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76 *(unsigned int*)addr);
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77 break;
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78 case T_LONG:
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79 v = PyInt_FromLong(*(long*)addr);
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80 break;
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81 case T_ULONG:
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82 v = PyLong_FromDouble((double)
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83 *(unsigned long*)addr);
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84 break;
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85 case T_FLOAT:
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86 v = PyFloat_FromDouble((double)*(float*)addr);
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87 break;
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88 case T_DOUBLE:
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89 v = PyFloat_FromDouble(*(double*)addr);
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90 break;
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91 case T_STRING:
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92 if (*(char**)addr == NULL) {
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93 Py_INCREF(Py_None);
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94 v = Py_None;
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95 }
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96 else
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97 v = PyString_FromString(*(char**)addr);
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98 break;
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99 case T_STRING_INPLACE:
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100 v = PyString_FromString((char*)addr);
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101 break;
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102 #ifdef macintosh
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103 case T_PSTRING:
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104 if (*(char**)addr == NULL) {
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105 Py_INCREF(Py_None);
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106 v = Py_None;
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107 }
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108 else
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109 v = PyString_FromStringAndSize(
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110 (*(char**)addr)+1,
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111 **(unsigned char**)addr);
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112 break;
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113 case T_PSTRING_INPLACE:
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114 v = PyString_FromStringAndSize(
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115 ((char*)addr)+1,
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116 *(unsigned char*)addr);
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117 break;
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118 #endif /* macintosh */
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119 case T_CHAR:
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120 v = PyString_FromStringAndSize((char*)addr, 1);
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121 break;
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122 case T_OBJECT:
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123 v = *(PyObject **)addr;
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124 if (v == NULL)
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125 v = Py_None;
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126 Py_INCREF(v);
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127 break;
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128 default:
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129 PyErr_SetString(PyExc_SystemError,
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130 "bad memberlist type");
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131 v = NULL;
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132 }
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133 return v;
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134 }
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135 }
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136
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137 PyErr_SetString(PyExc_AttributeError, name);
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138 return NULL;
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139 }
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140
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141 int
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142 PyMember_Set(addr, mlist, name, v)
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143 char *addr;
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144 struct memberlist *mlist;
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145 char *name;
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146 PyObject *v;
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147 {
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148 struct memberlist *l;
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149 PyObject *oldv;
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150
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151 for (l = mlist; l->name != NULL; l++) {
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152 if (strcmp(l->name, name) == 0) {
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153 #ifdef macintosh
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154 if (l->readonly || l->type == T_STRING ||
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155 l->type == T_PSTRING)
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156 {
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157 #else
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158 if (l->readonly || l->type == T_STRING ) {
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159 #endif /* macintosh */
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160 PyErr_SetString(PyExc_TypeError,
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161 "readonly attribute");
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162 return -1;
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163 }
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164 if (v == NULL && l->type != T_OBJECT) {
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165 PyErr_SetString(PyExc_TypeError,
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166 "can't delete numeric/char attribute");
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167 return -1;
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168 }
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169 addr += l->offset;
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170 switch (l->type) {
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171 case T_BYTE:
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172 case T_UBYTE:
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173 if (!PyInt_Check(v)) {
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174 PyErr_BadArgument();
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175 return -1;
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176 }
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177 *(char*)addr = (char) PyInt_AsLong(v);
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178 break;
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179 case T_SHORT:
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180 case T_USHORT:
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181 if (!PyInt_Check(v)) {
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182 PyErr_BadArgument();
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183 return -1;
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184 }
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185 *(short*)addr = (short) PyInt_AsLong(v);
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186 break;
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187 case T_UINT:
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188 case T_INT:
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189 if (!PyInt_Check(v)) {
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190 PyErr_BadArgument();
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191 return -1;
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192 }
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193 *(int*)addr = (int) PyInt_AsLong(v);
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194 break;
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195 case T_LONG:
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196 if (!PyInt_Check(v)) {
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197 PyErr_BadArgument();
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198 return -1;
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199 }
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200 *(long*)addr = PyInt_AsLong(v);
86
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201 break;
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202 case T_ULONG:
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203 if (PyInt_Check(v))
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204 *(long*)addr = PyInt_AsLong(v);
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205 else if (PyLong_Check(v))
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206 *(long*)addr = PyLong_AsLong(v);
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207 else {
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208 PyErr_BadArgument();
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209 return -1;
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210 }
dd7dfad404cd Added new types to setattr() as well...
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211 break;
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212 case T_FLOAT:
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213 if (PyInt_Check(v))
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214 *(float*)addr =
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215 (float) PyInt_AsLong(v);
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216 else if (PyFloat_Check(v))
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217 *(float*)addr =
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218 (float) PyFloat_AsDouble(v);
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219 else {
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220 PyErr_BadArgument();
86
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221 return -1;
a6934380c6e7 "Compiling" version
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222 }
a6934380c6e7 "Compiling" version
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223 break;
a6934380c6e7 "Compiling" version
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diff changeset
224 case T_DOUBLE:
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225 if (PyInt_Check(v))
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diff changeset
226 *(double*)addr =
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227 (double) PyInt_AsLong(v);
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228 else if (PyFloat_Check(v))
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229 *(double*)addr = PyFloat_AsDouble(v);
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230 else {
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231 PyErr_BadArgument();
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232 return -1;
a6934380c6e7 "Compiling" version
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233 }
a6934380c6e7 "Compiling" version
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234 break;
a6934380c6e7 "Compiling" version
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235 case T_OBJECT:
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236 Py_XINCREF(v);
8398
ff31f2501742 Trivial little change: when setting a member to an object, hold the
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237 oldv = *(PyObject **)addr;
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238 *(PyObject **)addr = v;
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ff31f2501742 Trivial little change: when setting a member to an object, hold the
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239 Py_XDECREF(oldv);
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240 break;
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241 case T_CHAR:
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242 if (PyString_Check(v) &&
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243 PyString_Size(v) == 1) {
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244 *(char*)addr =
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245 PyString_AsString(v)[0];
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246 }
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247 else {
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248 PyErr_BadArgument();
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249 return -1;
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diff changeset
250 }
86
a6934380c6e7 "Compiling" version
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251 default:
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252 PyErr_SetString(PyExc_SystemError,
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diff changeset
253 "bad memberlist type");
86
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254 return -1;
a6934380c6e7 "Compiling" version
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diff changeset
255 }
a6934380c6e7 "Compiling" version
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diff changeset
256 return 0;
a6934380c6e7 "Compiling" version
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diff changeset
257 }
a6934380c6e7 "Compiling" version
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258 }
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diff changeset
259
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260 PyErr_SetString(PyExc_AttributeError, name);
95
a5bf7d5959ce Return -1 for errors.
Guido van Rossum <guido@python.org>
parents: 86
diff changeset
261 return -1;
86
a6934380c6e7 "Compiling" version
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parents:
diff changeset
262 }