Mercurial > cpython-lru_cache-weakref
annotate Python/structmember.c @ 39455:ed65765eb679 legacy-trunk
Whoops, how did that get in there. :-) Revert all the parts of 51227 that were not supposed to go it. Only Modules/_ctypes/cfields.c was supposed to be changed
| author | Neal Norwitz <nnorwitz@gmail.com> |
|---|---|
| date | Sat, 12 Aug 2006 02:12:30 +0000 |
| parents | 8bc4a7e5fef8 |
| children | 0e83f8c5d70a 0c1cb92dac97 8f5b9982beba |
| rev | line source |
|---|---|
| 145 | 1 |
| 86 | 2 /* Map C struct members to Python object attributes */ |
| 3 | |
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4 #include "Python.h" |
| 86 | 5 |
| 6 #include "structmember.h" | |
| 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) |
| 86 | 33 { |
| 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); |
| 86 | 38 for (l = mlist; l->name != NULL; l++) { |
| 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, ©); |
| 86 | 47 } |
| 48 } | |
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49 PyErr_SetString(PyExc_AttributeError, name); |
| 86 | 50 return NULL; |
| 51 } | |
| 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 |
| 86 | 136 int |
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137 PyMember_Set(char *addr, struct memberlist *mlist, const char *name, PyObject *v) |
| 86 | 138 { |
| 139 struct memberlist *l; | |
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140 |
| 86 | 141 for (l = mlist; l->name != NULL; l++) { |
| 142 if (strcmp(l->name, name) == 0) { | |
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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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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, ©, v); |
| 86 | 150 } |
| 151 } | |
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152 |
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153 PyErr_SetString(PyExc_AttributeError, name); |
| 95 | 154 return -1; |
| 86 | 155 } |
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156 |
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157 int |
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158 PyMember_SetOne(char *addr, PyMemberDef *l, PyObject *v) |
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159 { |
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160 PyObject *oldv; |
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161 |
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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 } |
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171 if (v == NULL && l->type != T_OBJECT_EX && l->type != T_OBJECT) { |
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172 PyErr_SetString(PyExc_TypeError, |
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173 "can't delete numeric/char attribute"); |
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174 return -1; |
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175 } |
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176 addr += l->offset; |
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177 switch (l->type) { |
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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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181 PyErr_BadArgument(); |
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182 return -1; |
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183 } |
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184 *(char*)addr = (char) PyInt_AsLong(v); |
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185 break; |
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186 case T_SHORT: |
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187 case T_USHORT: |
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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 *(short*)addr = (short) PyInt_AsLong(v); |
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193 break; |
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194 case T_UINT: |
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195 case T_INT: |
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196 if (!PyInt_Check(v)) { |
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197 PyErr_BadArgument(); |
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198 return -1; |
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199 } |
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200 *(int*)addr = (int) PyInt_AsLong(v); |
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201 break; |
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202 case T_LONG: |
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203 if (!PyInt_Check(v)) { |
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204 PyErr_BadArgument(); |
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205 return -1; |
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206 } |
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207 *(long*)addr = PyInt_AsLong(v); |
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208 break; |
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209 case T_ULONG: |
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210 if (PyInt_Check(v)) |
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211 *(long*)addr = PyInt_AsLong(v); |
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212 else if (PyLong_Check(v)) |
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213 *(long*)addr = PyLong_AsLong(v); |
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214 else { |
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215 PyErr_BadArgument(); |
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216 return -1; |
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217 } |
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218 break; |
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219 case T_FLOAT: |
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220 if (PyInt_Check(v)) |
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221 *(float*)addr = |
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222 (float) PyInt_AsLong(v); |
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223 else if (PyFloat_Check(v)) |
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224 *(float*)addr = |
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225 (float) PyFloat_AsDouble(v); |
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226 else { |
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227 PyErr_BadArgument(); |
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228 return -1; |
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229 } |
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230 break; |
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231 case T_DOUBLE: |
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232 if (PyInt_Check(v)) |
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233 *(double*)addr = (double) PyInt_AsLong(v); |
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234 else if (PyFloat_Check(v)) |
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235 *(double*)addr = PyFloat_AsDouble(v); |
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236 else { |
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237 PyErr_BadArgument(); |
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238 return -1; |
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239 } |
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240 break; |
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241 case T_OBJECT: |
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242 case T_OBJECT_EX: |
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243 Py_XINCREF(v); |
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244 oldv = *(PyObject **)addr; |
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245 *(PyObject **)addr = v; |
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246 Py_XDECREF(oldv); |
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247 break; |
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248 case T_CHAR: |
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249 if (PyString_Check(v) && PyString_Size(v) == 1) { |
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250 *(char*)addr = PyString_AsString(v)[0]; |
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251 } |
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252 else { |
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253 PyErr_BadArgument(); |
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254 return -1; |
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255 } |
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256 break; |
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257 #ifdef HAVE_LONG_LONG |
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258 case T_LONGLONG: |
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259 if (!PyLong_Check(v)) { |
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260 PyErr_BadArgument(); |
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261 return -1; |
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262 } else { |
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263 PY_LONG_LONG value; |
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264 *(PY_LONG_LONG*)addr = value = PyLong_AsLongLong(v); |
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265 if ((value == -1) && PyErr_Occurred()) { |
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266 return -1; |
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267 } |
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268 } |
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269 break; |
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270 case T_ULONGLONG: |
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271 if (!PyLong_Check(v)) { |
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272 PyErr_BadArgument(); |
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273 return -1; |
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274 } else { |
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275 unsigned PY_LONG_LONG value; |
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276 *(unsigned PY_LONG_LONG*)addr = value = PyLong_AsUnsignedLongLong(v); |
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277 if ((value == (unsigned PY_LONG_LONG)-1) && |
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278 PyErr_Occurred()) { |
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279 return -1; |
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280 } |
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281 } |
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282 break; |
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283 #endif /* HAVE_LONG_LONG */ |
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284 default: |
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285 PyErr_Format(PyExc_SystemError, |
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286 "bad memberdescr type for %s", l->name); |
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287 return -1; |
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288 } |
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289 return 0; |
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290 } |
