Mercurial > cpython-lru_cache-weakref

annotate Python/structmember.c @ 37756:7b2e436a4a21 legacy-trunk

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Use Py_VISIT in all tp_traverse methods, instead of traversing manually or using a custom, nearly-identical macro. This probably changes how some of these functions are compiled, which may result in fractionally slower (or faster) execution. Considering the nature of traversal, visiting much of the address space in unpredictable patterns, I'd argue the code readability and maintainability is well worth it ;P
author Thomas Wouters <thomas@python.org>
date Sat, 15 Apr 2006 21:47:09 +0000
parents e9a10f74cf88
children 8bc4a7e5fef8
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_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 #ifdef HAVE_LONG_LONG
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122 case T_LONGLONG:
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123 v = PyLong_FromLongLong(*(PY_LONG_LONG *)addr);
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124 break;
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125 case T_ULONGLONG:
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126 v = PyLong_FromUnsignedLongLong(*(unsigned PY_LONG_LONG *)addr);
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127 break;
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128 #endif /* HAVE_LONG_LONG */
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129 default:
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130 PyErr_SetString(PyExc_SystemError, "bad memberdescr 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 int
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137 PyMember_Set(char *addr, struct memberlist *mlist, const char *name, PyObject *v)
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138 {
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139 struct memberlist *l;
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140
86
a6934380c6e7 "Compiling" version
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diff changeset
141 for (l = mlist; l->name != NULL; l++) {
a6934380c6e7 "Compiling" version
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142 if (strcmp(l->name, name) == 0) {
20012
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143 PyMemberDef copy;
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144 copy.name = l->name;
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145 copy.type = l->type;
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diff changeset
146 copy.offset = l->offset;
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147 copy.flags = l->flags;
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148 copy.doc = NULL;
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149 return PyMember_SetOne(addr, &copy, v);
86
a6934380c6e7 "Compiling" version
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150 }
a6934380c6e7 "Compiling" version
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parents:
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151 }
20012
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152
5373
5880384d7c71 Quickly renamed the remaining files -- this directory is done.
Guido van Rossum <guido@python.org>
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diff changeset
153 PyErr_SetString(PyExc_AttributeError, name);
95
a5bf7d5959ce Return -1 for errors.
Guido van Rossum <guido@python.org>
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diff changeset
154 return -1;
86
a6934380c6e7 "Compiling" version
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parents:
diff changeset
155 }
20012
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156
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diff changeset
157 int
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158 PyMember_SetOne(char *addr, PyMemberDef *l, PyObject *v)
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diff changeset
159 {
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diff changeset
160 PyObject *oldv;
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diff changeset
161
30979
86fdf8fe7f17 Getting rid of all the code inside #ifdef macintosh too.
Jack Jansen <jack.jansen@cwi.nl>
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162 if ((l->flags & READONLY) || l->type == T_STRING)
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163 {
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164 PyErr_SetString(PyExc_TypeError, "readonly attribute");
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165 return -1;
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166 }
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167 if ((l->flags & WRITE_RESTRICTED) && PyEval_GetRestricted()) {
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168 PyErr_SetString(PyExc_RuntimeError, "restricted attribute");
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169 return -1;
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170 }
21187
ef6f692c76e2 Fix SF bug #486144: Uninitialized __slot__ vrbl is None.
Guido van Rossum <guido@python.org>
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diff changeset
171 if (v == NULL && l->type != T_OBJECT_EX && l->type != T_OBJECT) {
20012
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172 PyErr_SetString(PyExc_TypeError,
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
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diff changeset
173 "can't delete numeric/char attribute");
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174 return -1;
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diff changeset
175 }
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176 addr += l->offset;
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diff changeset
177 switch (l->type) {
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diff changeset
178 case T_BYTE:
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179 case T_UBYTE:
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180 if (!PyInt_Check(v)) {
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diff changeset
181 PyErr_BadArgument();
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diff changeset
182 return -1;
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diff changeset
183 }
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
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diff changeset
184 *(char*)addr = (char) PyInt_AsLong(v);
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diff changeset
185 break;
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diff changeset
186 case T_SHORT:
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diff changeset
187 case T_USHORT:
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diff changeset
188 if (!PyInt_Check(v)) {
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diff changeset
189 PyErr_BadArgument();
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diff changeset
190 return -1;
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parents: 19942
diff changeset
191 }
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diff changeset
192 *(short*)addr = (short) PyInt_AsLong(v);
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
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diff changeset
193 break;
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diff changeset
194 case T_UINT:
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Guido van Rossum <guido@python.org>
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diff changeset
195 case T_INT:
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diff changeset
196 if (!PyInt_Check(v)) {
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diff changeset
197 PyErr_BadArgument();
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diff changeset
198 return -1;
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Guido van Rossum <guido@python.org>
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diff changeset
199 }
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diff changeset
200 *(int*)addr = (int) PyInt_AsLong(v);
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diff changeset
201 break;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
202 case T_LONG:
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Guido van Rossum <guido@python.org>
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diff changeset
203 if (!PyInt_Check(v)) {
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
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diff changeset
204 PyErr_BadArgument();
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
205 return -1;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
206 }
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
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diff changeset
207 *(long*)addr = PyInt_AsLong(v);
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diff changeset
208 break;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
209 case T_ULONG:
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Guido van Rossum <guido@python.org>
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diff changeset
210 if (PyInt_Check(v))
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
211 *(long*)addr = PyInt_AsLong(v);
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Guido van Rossum <guido@python.org>
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diff changeset
212 else if (PyLong_Check(v))
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
213 *(long*)addr = PyLong_AsLong(v);
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Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
214 else {
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
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parents: 19942
diff changeset
215 PyErr_BadArgument();
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
216 return -1;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
217 }
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
218 break;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
219 case T_FLOAT:
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Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
220 if (PyInt_Check(v))
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
221 *(float*)addr =
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
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diff changeset
222 (float) PyInt_AsLong(v);
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
223 else if (PyFloat_Check(v))
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
224 *(float*)addr =
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
225 (float) PyFloat_AsDouble(v);
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
226 else {
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
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diff changeset
227 PyErr_BadArgument();
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
228 return -1;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
229 }
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
230 break;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
231 case T_DOUBLE:
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
232 if (PyInt_Check(v))
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
233 *(double*)addr = (double) PyInt_AsLong(v);
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
234 else if (PyFloat_Check(v))
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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diff changeset
235 *(double*)addr = PyFloat_AsDouble(v);
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
236 else {
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
237 PyErr_BadArgument();
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
238 return -1;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
239 }
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
240 break;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
241 case T_OBJECT:
21187
ef6f692c76e2 Fix SF bug #486144: Uninitialized __slot__ vrbl is None.
Guido van Rossum <guido@python.org>
parents: 20456
diff changeset
242 case T_OBJECT_EX:
20012
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
243 Py_XINCREF(v);
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
244 oldv = *(PyObject **)addr;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
245 *(PyObject **)addr = v;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
246 Py_XDECREF(oldv);
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
247 break;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
248 case T_CHAR:
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
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parents: 19942
diff changeset
249 if (PyString_Check(v) && PyString_Size(v) == 1) {
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Guido van Rossum <guido@python.org>
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diff changeset
250 *(char*)addr = PyString_AsString(v)[0];
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Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
251 }
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
252 else {
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
253 PyErr_BadArgument();
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
254 return -1;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
255 }
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
256 break;
34677
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
257 #ifdef HAVE_LONG_LONG
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
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parents: 30979
diff changeset
258 case T_LONGLONG:
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
259 if (!PyLong_Check(v)) {
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
260 PyErr_BadArgument();
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
261 return -1;
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
262 } else {
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
263 *(PY_LONG_LONG*)addr = PyLong_AsLongLong(v);
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
264 if ((*addr == -1) && PyErr_Occurred()) {
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
265 return -1;
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
266 }
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
267 }
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
268 break;
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
269 case T_ULONGLONG:
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
270 if (!PyLong_Check(v)) {
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
271 PyErr_BadArgument();
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
272 return -1;
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
273 } else {
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
274 *(unsigned PY_LONG_LONG*)addr = PyLong_AsUnsignedLongLong(v);
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
275 if ((*addr == -1) && PyErr_Occurred()) {
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
276 return -1;
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
277 }
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
278 }
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
279 break;
e9ffad6d8822 Patch #1115086: support PY_LONGLONG in structmember.
Martin v. Löwis <martin@v.loewis.de>
parents: 30979
diff changeset
280 #endif /* HAVE_LONG_LONG */
20012
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
281 default:
20456
bff6c2d76f33 Put descr name in "bad memberdescr type" error message.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 20012
diff changeset
282 PyErr_Format(PyExc_SystemError,
bff6c2d76f33 Put descr name in "bad memberdescr type" error message.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 20012
diff changeset
283 "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
284 return -1;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
285 }
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
286 return 0;
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
parents: 19942
diff changeset
287 }