annotate Python/structmember.c @ 34043:f31e18d313c7 legacy-trunk v2.4

This commit was manufactured by cvs2svn to create tag 'r24'.
author cvs2svn <tools@python.org>
date Tue, 30 Nov 2004 01:49:18 +0000
parents 86fdf8fe7f17
children e9ffad6d8822
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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 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 case T_OBJECT_EX:
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116 v = *(PyObject **)addr;
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117 if (v == NULL)
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118 PyErr_SetString(PyExc_AttributeError, l->name);
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119 Py_XINCREF(v);
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120 break;
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121 default:
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122 PyErr_SetString(PyExc_SystemError, "bad memberdescr type");
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123 v = NULL;
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124 }
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125 return v;
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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
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133 for (l = mlist; l->name != NULL; l++) {
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134 if (strcmp(l->name, name) == 0) {
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135 PyMemberDef copy;
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136 copy.name = l->name;
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137 copy.type = l->type;
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138 copy.offset = l->offset;
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139 copy.flags = l->flags;
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140 copy.doc = NULL;
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141 return PyMember_SetOne(addr, &copy, v);
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142 }
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143 }
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144
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5880384d7c71 Quickly renamed the remaining files -- this directory is done.
Guido van Rossum <guido@python.org>
parents: 5287
diff changeset
145 PyErr_SetString(PyExc_AttributeError, name);
95
a5bf7d5959ce Return -1 for errors.
Guido van Rossum <guido@python.org>
parents: 86
diff changeset
146 return -1;
86
a6934380c6e7 "Compiling" version
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parents:
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147 }
20012
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148
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149 int
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150 PyMember_SetOne(char *addr, PyMemberDef *l, PyObject *v)
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151 {
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152 PyObject *oldv;
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153
30979
86fdf8fe7f17 Getting rid of all the code inside #ifdef macintosh too.
Jack Jansen <jack.jansen@cwi.nl>
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154 if ((l->flags & READONLY) || l->type == T_STRING)
20012
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155 {
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156 PyErr_SetString(PyExc_TypeError, "readonly attribute");
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157 return -1;
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158 }
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159 if ((l->flags & WRITE_RESTRICTED) && PyEval_GetRestricted()) {
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160 PyErr_SetString(PyExc_RuntimeError, "restricted attribute");
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161 return -1;
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162 }
21187
ef6f692c76e2 Fix SF bug #486144: Uninitialized __slot__ vrbl is None.
Guido van Rossum <guido@python.org>
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163 if (v == NULL && l->type != T_OBJECT_EX && l->type != T_OBJECT) {
20012
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164 PyErr_SetString(PyExc_TypeError,
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
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165 "can't delete numeric/char attribute");
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166 return -1;
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167 }
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168 addr += l->offset;
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169 switch (l->type) {
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170 case T_BYTE:
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171 case T_UBYTE:
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172 if (!PyInt_Check(v)) {
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173 PyErr_BadArgument();
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174 return -1;
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175 }
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176 *(char*)addr = (char) PyInt_AsLong(v);
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177 break;
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178 case T_SHORT:
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179 case T_USHORT:
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180 if (!PyInt_Check(v)) {
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181 PyErr_BadArgument();
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182 return -1;
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183 }
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184 *(short*)addr = (short) PyInt_AsLong(v);
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185 break;
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186 case T_UINT:
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187 case T_INT:
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188 if (!PyInt_Check(v)) {
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189 PyErr_BadArgument();
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190 return -1;
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191 }
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192 *(int*)addr = (int) PyInt_AsLong(v);
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193 break;
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194 case T_LONG:
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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 *(long*)addr = PyInt_AsLong(v);
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200 break;
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201 case T_ULONG:
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202 if (PyInt_Check(v))
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203 *(long*)addr = PyInt_AsLong(v);
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204 else if (PyLong_Check(v))
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205 *(long*)addr = PyLong_AsLong(v);
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diff changeset
206 else {
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207 PyErr_BadArgument();
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208 return -1;
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209 }
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210 break;
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211 case T_FLOAT:
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212 if (PyInt_Check(v))
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213 *(float*)addr =
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214 (float) PyInt_AsLong(v);
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215 else if (PyFloat_Check(v))
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216 *(float*)addr =
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217 (float) PyFloat_AsDouble(v);
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diff changeset
218 else {
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219 PyErr_BadArgument();
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220 return -1;
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diff changeset
221 }
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diff changeset
222 break;
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223 case T_DOUBLE:
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diff changeset
224 if (PyInt_Check(v))
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225 *(double*)addr = (double) PyInt_AsLong(v);
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226 else if (PyFloat_Check(v))
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227 *(double*)addr = PyFloat_AsDouble(v);
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diff changeset
228 else {
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229 PyErr_BadArgument();
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230 return -1;
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diff changeset
231 }
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
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diff changeset
232 break;
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diff changeset
233 case T_OBJECT:
21187
ef6f692c76e2 Fix SF bug #486144: Uninitialized __slot__ vrbl is None.
Guido van Rossum <guido@python.org>
parents: 20456
diff changeset
234 case T_OBJECT_EX:
20012
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235 Py_XINCREF(v);
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Guido van Rossum <guido@python.org>
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diff changeset
236 oldv = *(PyObject **)addr;
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diff changeset
237 *(PyObject **)addr = v;
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diff changeset
238 Py_XDECREF(oldv);
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diff changeset
239 break;
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diff changeset
240 case T_CHAR:
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diff changeset
241 if (PyString_Check(v) && PyString_Size(v) == 1) {
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242 *(char*)addr = PyString_AsString(v)[0];
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diff changeset
243 }
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
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diff changeset
244 else {
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245 PyErr_BadArgument();
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
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diff changeset
246 return -1;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
247 }
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
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diff changeset
248 break;
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parents: 19942
diff changeset
249 default:
20456
bff6c2d76f33 Put descr name in "bad memberdescr type" error message.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 20012
diff changeset
250 PyErr_Format(PyExc_SystemError,
bff6c2d76f33 Put descr name in "bad memberdescr type" error message.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 20012
diff changeset
251 "bad memberdescr type for %s", l->name);
20012
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diff changeset
252 return -1;
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diff changeset
253 }
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
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diff changeset
254 return 0;
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diff changeset
255 }