Mercurial > cpython-lru_cache-weakref

annotate Python/structmember.c @ 46634:cc66029d2efe legacy-trunk

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Fix some indentation errors.
author Brett Cannon <bcannon@gmail.com>
date Sat, 03 May 2008 01:02:41 +0000
parents eb4b50f739f6
children 4fe192d48960
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_BOOL:
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65 v = PyBool_FromLong(*(char*)addr);
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66 break;
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67 case T_BYTE:
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68 v = PyInt_FromLong(*(char*)addr);
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69 break;
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70 case T_UBYTE:
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71 v = PyLong_FromUnsignedLong(*(unsigned char*)addr);
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72 break;
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73 case T_SHORT:
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74 v = PyInt_FromLong(*(short*)addr);
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75 break;
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76 case T_USHORT:
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77 v = PyLong_FromUnsignedLong(*(unsigned short*)addr);
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78 break;
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79 case T_INT:
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80 v = PyInt_FromLong(*(int*)addr);
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81 break;
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82 case T_UINT:
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83 v = PyLong_FromUnsignedLong(*(unsigned int*)addr);
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84 break;
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85 case T_LONG:
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86 v = PyInt_FromLong(*(long*)addr);
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87 break;
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88 case T_ULONG:
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89 v = PyLong_FromUnsignedLong(*(unsigned long*)addr);
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90 break;
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91 case T_PYSSIZET:
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92 v = PyInt_FromSsize_t(*(Py_ssize_t*)addr);
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93 break;
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94 case T_FLOAT:
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95 v = PyFloat_FromDouble((double)*(float*)addr);
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96 break;
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97 case T_DOUBLE:
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98 v = PyFloat_FromDouble(*(double*)addr);
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99 break;
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100 case T_STRING:
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101 if (*(char**)addr == NULL) {
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102 Py_INCREF(Py_None);
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103 v = Py_None;
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104 }
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105 else
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106 v = PyString_FromString(*(char**)addr);
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107 break;
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108 case T_STRING_INPLACE:
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109 v = PyString_FromString((char*)addr);
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110 break;
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111 case T_CHAR:
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112 v = PyString_FromStringAndSize((char*)addr, 1);
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113 break;
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114 case T_OBJECT:
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115 v = *(PyObject **)addr;
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116 if (v == NULL)
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117 v = Py_None;
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118 Py_INCREF(v);
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119 break;
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120 case T_OBJECT_EX:
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121 v = *(PyObject **)addr;
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122 if (v == NULL)
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123 PyErr_SetString(PyExc_AttributeError, l->name);
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124 Py_XINCREF(v);
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125 break;
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126 #ifdef HAVE_LONG_LONG
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127 case T_LONGLONG:
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128 v = PyLong_FromLongLong(*(PY_LONG_LONG *)addr);
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129 break;
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130 case T_ULONGLONG:
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131 v = PyLong_FromUnsignedLongLong(*(unsigned PY_LONG_LONG *)addr);
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132 break;
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133 #endif /* HAVE_LONG_LONG */
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134 default:
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135 PyErr_SetString(PyExc_SystemError, "bad memberdescr type");
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136 v = NULL;
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137 }
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138 return v;
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139 }
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140
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141 int
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Tim Peters <tim.peters@gmail.com>
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142 PyMember_Set(char *addr, struct memberlist *mlist, const char *name, PyObject *v)
86
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143 {
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144 struct memberlist *l;
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145
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146 for (l = mlist; l->name != NULL; l++) {
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147 if (strcmp(l->name, name) == 0) {
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148 PyMemberDef copy;
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149 copy.name = l->name;
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150 copy.type = l->type;
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151 copy.offset = l->offset;
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152 copy.flags = l->flags;
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153 copy.doc = NULL;
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154 return PyMember_SetOne(addr, &copy, v);
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155 }
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156 }
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157
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5880384d7c71 Quickly renamed the remaining files -- this directory is done.
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158 PyErr_SetString(PyExc_AttributeError, name);
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a5bf7d5959ce Return -1 for errors.
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159 return -1;
86
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160 }
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161
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162 #define WARN(msg) \
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163 do { \
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164 if (PyErr_Warn(PyExc_RuntimeWarning, msg) < 0) \
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165 return -1; \
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166 } while (0)
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167
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168 int
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169 PyMember_SetOne(char *addr, PyMemberDef *l, PyObject *v)
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170 {
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171 PyObject *oldv;
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172
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86fdf8fe7f17 Getting rid of all the code inside #ifdef macintosh too.
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173 if ((l->flags & READONLY) || l->type == T_STRING)
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174 {
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175 PyErr_SetString(PyExc_TypeError, "readonly attribute");
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176 return -1;
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177 }
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a8dd8874ff2d Backport of the PCbuild9 directory from the py3k branch.
Christian Heimes <christian@cheimes.de>
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178 if ((l->flags & PY_WRITE_RESTRICTED) && PyEval_GetRestricted()) {
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179 PyErr_SetString(PyExc_RuntimeError, "restricted attribute");
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180 return -1;
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181 }
21187
ef6f692c76e2 Fix SF bug #486144: Uninitialized __slot__ vrbl is None.
Guido van Rossum <guido@python.org>
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182 if (v == NULL && l->type != T_OBJECT_EX && l->type != T_OBJECT) {
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183 PyErr_SetString(PyExc_TypeError,
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184 "can't delete numeric/char attribute");
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185 return -1;
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186 }
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187 addr += l->offset;
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188 switch (l->type) {
44863
eb4b50f739f6 Patch #1720595: add T_BOOL to the range of structmember types.
Georg Brandl <georg@python.org>
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189 case T_BOOL:{
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diff changeset
190 if (!PyBool_Check(v)) {
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diff changeset
191 PyErr_SetString(PyExc_TypeError,
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192 "attribute value type must be bool");
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193 return -1;
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Georg Brandl <georg@python.org>
parents: 43972
diff changeset
194 }
eb4b50f739f6 Patch #1720595: add T_BOOL to the range of structmember types.
Georg Brandl <georg@python.org>
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diff changeset
195 if (v == Py_True)
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Georg Brandl <georg@python.org>
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diff changeset
196 *(char*)addr = (char) 1;
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diff changeset
197 else
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diff changeset
198 *(char*)addr = (char) 0;
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diff changeset
199 break;
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200 }
40176
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diff changeset
201 case T_BYTE:{
42454
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202 long long_val = PyInt_AsLong(v);
40176
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203 if ((long_val == -1) && PyErr_Occurred())
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204 return -1;
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diff changeset
205 *(char*)addr = (char)long_val;
40176
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206 /* XXX: For compatibility, only warn about truncations
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diff changeset
207 for now. */
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diff changeset
208 if ((long_val > CHAR_MAX) || (long_val < CHAR_MIN))
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209 WARN("Truncation of value to char");
20012
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diff changeset
210 break;
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diff changeset
211 }
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diff changeset
212 case T_UBYTE:{
42454
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diff changeset
213 long long_val = PyInt_AsLong(v);
40176
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diff changeset
214 if ((long_val == -1) && PyErr_Occurred())
20012
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215 return -1;
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diff changeset
216 *(unsigned char*)addr = (unsigned char)long_val;
40176
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diff changeset
217 if ((long_val > UCHAR_MAX) || (long_val < 0))
42454
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diff changeset
218 WARN("Truncation of value to unsigned char");
40176
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diff changeset
219 break;
20012
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diff changeset
220 }
40176
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
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diff changeset
221 case T_SHORT:{
42454
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diff changeset
222 long long_val = PyInt_AsLong(v);
40176
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diff changeset
223 if ((long_val == -1) && PyErr_Occurred())
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
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diff changeset
224 return -1;
42454
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diff changeset
225 *(short*)addr = (short)long_val;
40176
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
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diff changeset
226 if ((long_val > SHRT_MAX) || (long_val < SHRT_MIN))
42454
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diff changeset
227 WARN("Truncation of value to short");
40176
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diff changeset
228 break;
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diff changeset
229 }
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
Martin v. Löwis <martin@v.loewis.de>
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diff changeset
230 case T_USHORT:{
42454
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diff changeset
231 long long_val = PyInt_AsLong(v);
40176
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
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diff changeset
232 if ((long_val == -1) && PyErr_Occurred())
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
Martin v. Löwis <martin@v.loewis.de>
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diff changeset
233 return -1;
42454
648577cc688a Handle errors when generating a warning.
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diff changeset
234 *(unsigned short*)addr = (unsigned short)long_val;
40176
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
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diff changeset
235 if ((long_val > USHRT_MAX) || (long_val < 0))
42454
648577cc688a Handle errors when generating a warning.
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diff changeset
236 WARN("Truncation of value to unsigned short");
20012
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
237 break;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
238 }
40176
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
Martin v. Löwis <martin@v.loewis.de>
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diff changeset
239 case T_INT:{
42454
648577cc688a Handle errors when generating a warning.
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diff changeset
240 long long_val = PyInt_AsLong(v);
40176
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
Martin v. Löwis <martin@v.loewis.de>
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diff changeset
241 if ((long_val == -1) && PyErr_Occurred())
20012
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Guido van Rossum <guido@python.org>
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diff changeset
242 return -1;
42454
648577cc688a Handle errors when generating a warning.
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diff changeset
243 *(int *)addr = (int)long_val;
40176
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
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diff changeset
244 if ((long_val > INT_MAX) || (long_val < INT_MIN))
42454
648577cc688a Handle errors when generating a warning.
Neal Norwitz <nnorwitz@gmail.com>
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diff changeset
245 WARN("Truncation of value to int");
20012
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Guido van Rossum <guido@python.org>
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diff changeset
246 break;
40176
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diff changeset
247 }
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
Martin v. Löwis <martin@v.loewis.de>
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diff changeset
248 case T_UINT:{
42454
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diff changeset
249 unsigned long ulong_val = PyLong_AsUnsignedLong(v);
40176
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diff changeset
250 if ((ulong_val == (unsigned int)-1) && PyErr_Occurred()) {
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
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parents: 38024
diff changeset
251 /* XXX: For compatibility, accept negative int values
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diff changeset
252 as well. */
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diff changeset
253 PyErr_Clear();
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diff changeset
254 ulong_val = PyLong_AsLong(v);
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
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parents: 38024
diff changeset
255 if ((ulong_val == (unsigned int)-1) && PyErr_Occurred())
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 38024
diff changeset
256 return -1;
42454
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diff changeset
257 *(unsigned int *)addr = (unsigned int)ulong_val;
648577cc688a Handle errors when generating a warning.
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parents: 42083
diff changeset
258 WARN("Writing negative value into unsigned field");
648577cc688a Handle errors when generating a warning.
Neal Norwitz <nnorwitz@gmail.com>
parents: 42083
diff changeset
259 } else
648577cc688a Handle errors when generating a warning.
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diff changeset
260 *(unsigned int *)addr = (unsigned int)ulong_val;
40176
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diff changeset
261 if (ulong_val > UINT_MAX)
42454
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diff changeset
262 WARN("Truncation of value to unsigned int");
40176
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
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diff changeset
263 break;
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 38024
diff changeset
264 }
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 38024
diff changeset
265 case T_LONG:{
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
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diff changeset
266 *(long*)addr = PyLong_AsLong(v);
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 38024
diff changeset
267 if ((*(long*)addr == -1) && PyErr_Occurred())
20012
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diff changeset
268 return -1;
40176
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
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diff changeset
269 break;
0c1cb92dac97 Patch #1549049: Rewrite type conversion in structmember.
Martin v. Löwis <martin@v.loewis.de>
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diff changeset
270 }
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271 case T_ULONG:{
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272 *(unsigned long*)addr = PyLong_AsUnsignedLong(v);
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273 if ((*(unsigned long*)addr == (unsigned long)-1)
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274 && PyErr_Occurred()) {
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275 /* XXX: For compatibility, accept negative int values
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276 as well. */
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277 PyErr_Clear();
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278 *(unsigned long*)addr = PyLong_AsLong(v);
42454
648577cc688a Handle errors when generating a warning.
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279 if ((*(unsigned long*)addr == (unsigned int)-1)
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parents: 42083
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280 && PyErr_Occurred())
40176
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281 return -1;
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282 WARN("Writing negative value into unsigned field");
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283 }
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284 break;
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285 }
42083
37189e375ec7 Add T_PYSSIZET in structmember.h: This can be used for
Walter Dörwald <walter@livinglogic.de>
parents: 42007
diff changeset
286 case T_PYSSIZET:{
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287 *(Py_ssize_t*)addr = PyInt_AsSsize_t(v);
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parents: 42007
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288 if ((*(Py_ssize_t*)addr == (Py_ssize_t)-1)
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289 && PyErr_Occurred())
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290 return -1;
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parents: 42007
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291 break;
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Walter Dörwald <walter@livinglogic.de>
parents: 42007
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292 }
40176
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293 case T_FLOAT:{
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294 double double_val = PyFloat_AsDouble(v);
40176
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diff changeset
295 if ((double_val == -1) && PyErr_Occurred())
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diff changeset
296 return -1;
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diff changeset
297 *(float*)addr = (float)double_val;
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298 break;
40176
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299 }
20012
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300 case T_DOUBLE:
40176
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diff changeset
301 *(double*)addr = PyFloat_AsDouble(v);
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parents: 38024
diff changeset
302 if ((*(double*)addr == -1) && PyErr_Occurred())
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303 return -1;
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Guido van Rossum <guido@python.org>
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diff changeset
304 break;
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parents: 19942
diff changeset
305 case T_OBJECT:
21187
ef6f692c76e2 Fix SF bug #486144: Uninitialized __slot__ vrbl is None.
Guido van Rossum <guido@python.org>
parents: 20456
diff changeset
306 case T_OBJECT_EX:
20012
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diff changeset
307 Py_XINCREF(v);
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308 oldv = *(PyObject **)addr;
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diff changeset
309 *(PyObject **)addr = v;
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diff changeset
310 Py_XDECREF(oldv);
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Guido van Rossum <guido@python.org>
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diff changeset
311 break;
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Guido van Rossum <guido@python.org>
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diff changeset
312 case T_CHAR:
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Guido van Rossum <guido@python.org>
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diff changeset
313 if (PyString_Check(v) && PyString_Size(v) == 1) {
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
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parents: 19942
diff changeset
314 *(char*)addr = PyString_AsString(v)[0];
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
315 }
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Guido van Rossum <guido@python.org>
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diff changeset
316 else {
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
317 PyErr_BadArgument();
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
318 return -1;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
319 }
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
320 break;
34677
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
321 #ifdef HAVE_LONG_LONG
42007
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
322 case T_LONGLONG:{
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Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
323 PY_LONG_LONG value;
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Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
324 *(PY_LONG_LONG*)addr = value = PyLong_AsLongLong(v);
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
325 if ((value == -1) && PyErr_Occurred())
34677
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
326 return -1;
42007
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
327 break;
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
328 }
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
329 case T_ULONGLONG:{
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
330 unsigned PY_LONG_LONG value;
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
331 /* ??? PyLong_AsLongLong accepts an int, but PyLong_AsUnsignedLongLong
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
332 doesn't ??? */
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
333 if (PyLong_Check(v))
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
334 *(unsigned PY_LONG_LONG*)addr = value = PyLong_AsUnsignedLongLong(v);
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
335 else
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
336 *(unsigned PY_LONG_LONG*)addr = value = PyInt_AsLong(v);
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
337 if ((value == (unsigned PY_LONG_LONG)-1) && PyErr_Occurred())
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
338 return -1;
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
339 break;
e8413971212d Patch #1733960: Allow T_LONGLONG to accept ints.
Martin v. Löwis <martin@v.loewis.de>
parents: 40176
diff changeset
340 }
34677
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
341 #endif /* HAVE_LONG_LONG */
20012
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
342 default:
20456
bff6c2d76f33 Put descr name in "bad memberdescr type" error message.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 20012
diff changeset
343 PyErr_Format(PyExc_SystemError,
bff6c2d76f33 Put descr name in "bad memberdescr type" error message.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 20012
diff changeset
344 "bad memberdescr type for %s", l->name);
20012
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
345 return -1;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
346 }
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
347 return 0;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
348 }