Mercurial > cpython-lru_cache-weakref

annotate Python/structmember.c @ 18333:41243cb4ea05 legacy-trunk

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Another "if 0:" hack, this time to complain about otherwise invisible "return expr" instances in generators (which latter may be generators due to otherwise invisible "yield" stmts hiding in "if 0" blocks). This was fun the first time, but this has gotten truly ugly now.
author Tim Peters <tim.peters@gmail.com>
date Thu, 28 Jun 2001 01:52:22 +0000
parents 7b3476c1382e
children 8522b022f80a
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(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 PyObject *v;
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41 addr += l->offset;
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42 switch (l->type) {
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43 case T_BYTE:
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44 v = PyInt_FromLong((long)
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45 (((*(char*)addr & 0xff)
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46 ^ 0x80) - 0x80));
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47 break;
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48 case T_UBYTE:
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49 v = PyInt_FromLong((long) *(char*)addr & 0xff);
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50 break;
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51 case T_SHORT:
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52 v = PyInt_FromLong((long) *(short*)addr);
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53 break;
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54 case T_USHORT:
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55 v = PyInt_FromLong((long)
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56 *(unsigned short*)addr);
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57 break;
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58 case T_INT:
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59 v = PyInt_FromLong((long) *(int*)addr);
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60 break;
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61 case T_UINT:
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62 v = PyInt_FromLong((long)
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63 *(unsigned int*)addr);
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64 break;
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65 case T_LONG:
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66 v = PyInt_FromLong(*(long*)addr);
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67 break;
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68 case T_ULONG:
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69 v = PyLong_FromDouble((double)
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70 *(unsigned long*)addr);
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71 break;
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72 case T_FLOAT:
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73 v = PyFloat_FromDouble((double)*(float*)addr);
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74 break;
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75 case T_DOUBLE:
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76 v = PyFloat_FromDouble(*(double*)addr);
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77 break;
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78 case T_STRING:
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79 if (*(char**)addr == NULL) {
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80 Py_INCREF(Py_None);
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81 v = Py_None;
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82 }
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83 else
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84 v = PyString_FromString(*(char**)addr);
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85 break;
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86 case T_STRING_INPLACE:
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87 v = PyString_FromString((char*)addr);
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88 break;
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89 #ifdef macintosh
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90 case T_PSTRING:
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91 if (*(char**)addr == NULL) {
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92 Py_INCREF(Py_None);
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93 v = Py_None;
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94 }
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95 else
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96 v = PyString_FromStringAndSize(
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97 (*(char**)addr)+1,
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98 **(unsigned char**)addr);
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99 break;
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100 case T_PSTRING_INPLACE:
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101 v = PyString_FromStringAndSize(
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102 ((char*)addr)+1,
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103 *(unsigned char*)addr);
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104 break;
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105 #endif /* macintosh */
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106 case T_CHAR:
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107 v = PyString_FromStringAndSize((char*)addr, 1);
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108 break;
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109 case T_OBJECT:
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110 v = *(PyObject **)addr;
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111 if (v == NULL)
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112 v = Py_None;
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113 Py_INCREF(v);
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114 break;
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115 default:
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116 PyErr_SetString(PyExc_SystemError,
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117 "bad memberlist type");
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118 v = NULL;
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119 }
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120 return v;
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121 }
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122 }
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123
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124 PyErr_SetString(PyExc_AttributeError, name);
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125 return NULL;
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126 }
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127
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128 int
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129 PyMember_Set(char *addr, struct memberlist *mlist, char *name, PyObject *v)
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130 {
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131 struct memberlist *l;
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132 PyObject *oldv;
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133
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134 for (l = mlist; l->name != NULL; l++) {
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135 if (strcmp(l->name, name) == 0) {
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136 #ifdef macintosh
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137 if (l->readonly || l->type == T_STRING ||
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138 l->type == T_PSTRING)
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139 {
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140 #else
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141 if (l->readonly || l->type == T_STRING ) {
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142 #endif /* macintosh */
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143 PyErr_SetString(PyExc_TypeError,
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144 "readonly attribute");
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145 return -1;
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146 }
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147 if (v == NULL && l->type != T_OBJECT) {
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148 PyErr_SetString(PyExc_TypeError,
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149 "can't delete numeric/char attribute");
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150 return -1;
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151 }
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152 addr += l->offset;
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153 switch (l->type) {
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154 case T_BYTE:
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155 case T_UBYTE:
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156 if (!PyInt_Check(v)) {
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157 PyErr_BadArgument();
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158 return -1;
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159 }
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160 *(char*)addr = (char) PyInt_AsLong(v);
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161 break;
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162 case T_SHORT:
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163 case T_USHORT:
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164 if (!PyInt_Check(v)) {
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165 PyErr_BadArgument();
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166 return -1;
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167 }
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168 *(short*)addr = (short) PyInt_AsLong(v);
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169 break;
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170 case T_UINT:
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171 case T_INT:
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172 if (!PyInt_Check(v)) {
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173 PyErr_BadArgument();
86
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174 return -1;
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175 }
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176 *(int*)addr = (int) PyInt_AsLong(v);
86
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177 break;
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178 case T_LONG:
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179 if (!PyInt_Check(v)) {
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180 PyErr_BadArgument();
86
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181 return -1;
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182 }
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183 *(long*)addr = PyInt_AsLong(v);
86
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184 break;
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185 case T_ULONG:
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186 if (PyInt_Check(v))
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187 *(long*)addr = PyInt_AsLong(v);
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188 else if (PyLong_Check(v))
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189 *(long*)addr = PyLong_AsLong(v);
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190 else {
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191 PyErr_BadArgument();
888
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192 return -1;
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diff changeset
193 }
dd7dfad404cd Added new types to setattr() as well...
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194 break;
86
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195 case T_FLOAT:
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196 if (PyInt_Check(v))
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Guido van Rossum <guido@python.org>
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diff changeset
197 *(float*)addr =
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198 (float) PyInt_AsLong(v);
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199 else if (PyFloat_Check(v))
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200 *(float*)addr =
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201 (float) PyFloat_AsDouble(v);
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202 else {
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203 PyErr_BadArgument();
86
a6934380c6e7 "Compiling" version
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204 return -1;
a6934380c6e7 "Compiling" version
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parents:
diff changeset
205 }
a6934380c6e7 "Compiling" version
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parents:
diff changeset
206 break;
a6934380c6e7 "Compiling" version
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parents:
diff changeset
207 case T_DOUBLE:
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208 if (PyInt_Check(v))
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Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
209 *(double*)addr =
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diff changeset
210 (double) PyInt_AsLong(v);
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diff changeset
211 else if (PyFloat_Check(v))
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212 *(double*)addr = PyFloat_AsDouble(v);
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213 else {
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diff changeset
214 PyErr_BadArgument();
86
a6934380c6e7 "Compiling" version
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diff changeset
215 return -1;
a6934380c6e7 "Compiling" version
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parents:
diff changeset
216 }
a6934380c6e7 "Compiling" version
Guido van Rossum <guido@python.org>
parents:
diff changeset
217 break;
a6934380c6e7 "Compiling" version
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diff changeset
218 case T_OBJECT:
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diff changeset
219 Py_XINCREF(v);
8398
ff31f2501742 Trivial little change: when setting a member to an object, hold the
Guido van Rossum <guido@python.org>
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diff changeset
220 oldv = *(PyObject **)addr;
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diff changeset
221 *(PyObject **)addr = v;
8398
ff31f2501742 Trivial little change: when setting a member to an object, hold the
Guido van Rossum <guido@python.org>
parents: 5373
diff changeset
222 Py_XDECREF(oldv);
86
a6934380c6e7 "Compiling" version
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diff changeset
223 break;
888
dd7dfad404cd Added new types to setattr() as well...
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diff changeset
224 case T_CHAR:
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diff changeset
225 if (PyString_Check(v) &&
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diff changeset
226 PyString_Size(v) == 1) {
888
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diff changeset
227 *(char*)addr =
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diff changeset
228 PyString_AsString(v)[0];
888
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diff changeset
229 }
dd7dfad404cd Added new types to setattr() as well...
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parents: 795
diff changeset
230 else {
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diff changeset
231 PyErr_BadArgument();
888
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diff changeset
232 return -1;
dd7dfad404cd Added new types to setattr() as well...
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
233 }
16295
7b3476c1382e SF bug http://sourceforge.net/bugs/?func=detailbug&bug_id=130242&group_id=5470
Tim Peters <tim.peters@gmail.com>
parents: 14375
diff changeset
234 break;
86
a6934380c6e7 "Compiling" version
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parents:
diff changeset
235 default:
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diff changeset
236 PyErr_SetString(PyExc_SystemError,
5880384d7c71 Quickly renamed the remaining files -- this directory is done.
Guido van Rossum <guido@python.org>
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diff changeset
237 "bad memberlist type");
86
a6934380c6e7 "Compiling" version
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parents:
diff changeset
238 return -1;
a6934380c6e7 "Compiling" version
Guido van Rossum <guido@python.org>
parents:
diff changeset
239 }
a6934380c6e7 "Compiling" version
Guido van Rossum <guido@python.org>
parents:
diff changeset
240 return 0;
a6934380c6e7 "Compiling" version
Guido van Rossum <guido@python.org>
parents:
diff changeset
241 }
a6934380c6e7 "Compiling" version
Guido van Rossum <guido@python.org>
parents:
diff changeset
242 }
a6934380c6e7 "Compiling" version
Guido van Rossum <guido@python.org>
parents:
diff changeset
243
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diff changeset
244 PyErr_SetString(PyExc_AttributeError, name);
95
a5bf7d5959ce Return -1 for errors.
Guido van Rossum <guido@python.org>
parents: 86
diff changeset
245 return -1;
86
a6934380c6e7 "Compiling" version
Guido van Rossum <guido@python.org>
parents:
diff changeset
246 }