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annotate Python/errors.c @ 61465:e38335d4df91 2.6

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Recorded merge of revisions 81029 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r81029 | antoine.pitrou | 2010-05-09 16:46:46 +0200 (dim., 09 mai 2010) | 3 lines Untabify C files. Will watch buildbots. ........
author Antoine Pitrou <solipsis@pitrou.net>
date Sun, 09 May 2010 15:15:40 +0000
parents 3889d9528601
children 787b969d37f0
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1
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2 /* Error handling */
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3
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4 #include "Python.h"
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5
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6 #ifndef __STDC__
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7 #ifndef MS_WINDOWS
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8 extern char *strerror(int);
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9 #endif
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10 #endif
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11
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12 #ifdef MS_WINDOWS
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13 #include "windows.h"
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14 #include "winbase.h"
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15 #endif
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16
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17 #include <ctype.h>
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18
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19 #ifdef __cplusplus
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20 extern "C" {
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21 #endif
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24 void
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25 PyErr_Restore(PyObject *type, PyObject *value, PyObject *traceback)
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26 {
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27 PyThreadState *tstate = PyThreadState_GET();
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28 PyObject *oldtype, *oldvalue, *oldtraceback;
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29
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30 if (traceback != NULL && !PyTraceBack_Check(traceback)) {
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31 /* XXX Should never happen -- fatal error instead? */
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32 /* Well, it could be None. */
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33 Py_DECREF(traceback);
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34 traceback = NULL;
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35 }
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37 /* Save these in locals to safeguard against recursive
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38 invocation through Py_XDECREF */
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39 oldtype = tstate->curexc_type;
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40 oldvalue = tstate->curexc_value;
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41 oldtraceback = tstate->curexc_traceback;
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43 tstate->curexc_type = type;
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44 tstate->curexc_value = value;
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45 tstate->curexc_traceback = traceback;
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46
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47 Py_XDECREF(oldtype);
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48 Py_XDECREF(oldvalue);
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49 Py_XDECREF(oldtraceback);
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50 }
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51
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52 void
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53 PyErr_SetObject(PyObject *exception, PyObject *value)
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54 {
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55 Py_XINCREF(exception);
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56 Py_XINCREF(value);
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57 PyErr_Restore(exception, value, (PyObject *)NULL);
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58 }
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60 void
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61 PyErr_SetNone(PyObject *exception)
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62 {
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63 PyErr_SetObject(exception, (PyObject *)NULL);
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64 }
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66 void
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67 PyErr_SetString(PyObject *exception, const char *string)
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68 {
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69 PyObject *value = PyString_FromString(string);
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70 PyErr_SetObject(exception, value);
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71 Py_XDECREF(value);
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72 }
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73
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74
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75 PyObject *
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76 PyErr_Occurred(void)
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77 {
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78 PyThreadState *tstate = PyThreadState_GET();
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79
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80 return tstate->curexc_type;
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81 }
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84 int
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85 PyErr_GivenExceptionMatches(PyObject *err, PyObject *exc)
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86 {
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87 if (err == NULL || exc == NULL) {
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88 /* maybe caused by "import exceptions" that failed early on */
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89 return 0;
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90 }
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91 if (PyTuple_Check(exc)) {
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92 Py_ssize_t i, n;
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93 n = PyTuple_Size(exc);
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94 for (i = 0; i < n; i++) {
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95 /* Test recursively */
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96 if (PyErr_GivenExceptionMatches(
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97 err, PyTuple_GET_ITEM(exc, i)))
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98 {
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99 return 1;
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100 }
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101 }
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102 return 0;
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103 }
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104 /* err might be an instance, so check its class. */
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105 if (PyExceptionInstance_Check(err))
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106 err = PyExceptionInstance_Class(err);
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107
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108 if (PyExceptionClass_Check(err) && PyExceptionClass_Check(exc)) {
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109 int res = 0;
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110 PyObject *exception, *value, *tb;
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111 PyErr_Fetch(&exception, &value, &tb);
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112 res = PyObject_IsSubclass(err, exc);
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113 /* This function must not fail, so print the error here */
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114 if (res == -1) {
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115 PyErr_WriteUnraisable(err);
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116 res = 0;
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117 }
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118 PyErr_Restore(exception, value, tb);
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119 return res;
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120 }
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121
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122 return err == exc;
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123 }
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126 int
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127 PyErr_ExceptionMatches(PyObject *exc)
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128 {
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129 return PyErr_GivenExceptionMatches(PyErr_Occurred(), exc);
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130 }
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133 /* Used in many places to normalize a raised exception, including in
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134 eval_code2(), do_raise(), and PyErr_Print()
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135 */
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136 void
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137 PyErr_NormalizeException(PyObject **exc, PyObject **val, PyObject **tb)
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138 {
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139 PyObject *type = *exc;
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140 PyObject *value = *val;
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141 PyObject *inclass = NULL;
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142 PyObject *initial_tb = NULL;
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143 PyThreadState *tstate = NULL;
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144
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145 if (type == NULL) {
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146 /* There was no exception, so nothing to do. */
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147 return;
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148 }
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149
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150 /* If PyErr_SetNone() was used, the value will have been actually
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151 set to NULL.
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152 */
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153 if (!value) {
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154 value = Py_None;
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155 Py_INCREF(value);
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156 }
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157
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158 if (PyExceptionInstance_Check(value))
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159 inclass = PyExceptionInstance_Class(value);
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160
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161 /* Normalize the exception so that if the type is a class, the
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162 value will be an instance.
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163 */
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164 if (PyExceptionClass_Check(type)) {
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165 /* if the value was not an instance, or is not an instance
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166 whose class is (or is derived from) type, then use the
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167 value as an argument to instantiation of the type
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168 class.
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169 */
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170 if (!inclass || !PyObject_IsSubclass(inclass, type)) {
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171 PyObject *args, *res;
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172
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173 if (value == Py_None)
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174 args = PyTuple_New(0);
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175 else if (PyTuple_Check(value)) {
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176 Py_INCREF(value);
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177 args = value;
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178 }
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179 else
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180 args = PyTuple_Pack(1, value);
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181
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182 if (args == NULL)
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183 goto finally;
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184 res = PyEval_CallObject(type, args);
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185 Py_DECREF(args);
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186 if (res == NULL)
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187 goto finally;
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188 Py_DECREF(value);
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189 value = res;
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190 }
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191 /* if the class of the instance doesn't exactly match the
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192 class of the type, believe the instance
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193 */
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194 else if (inclass != type) {
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195 Py_DECREF(type);
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196 type = inclass;
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197 Py_INCREF(type);
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198 }
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199 }
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200 *exc = type;
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201 *val = value;
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202 return;
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203 finally:
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204 Py_DECREF(type);
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205 Py_DECREF(value);
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206 /* If the new exception doesn't set a traceback and the old
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207 exception had a traceback, use the old traceback for the
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208 new exception. It's better than nothing.
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209 */
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210 initial_tb = *tb;
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211 PyErr_Fetch(exc, val, tb);
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212 if (initial_tb != NULL) {
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213 if (*tb == NULL)
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214 *tb = initial_tb;
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215 else
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216 Py_DECREF(initial_tb);
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217 }
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218 /* normalize recursively */
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219 tstate = PyThreadState_GET();
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220 if (++tstate->recursion_depth > Py_GetRecursionLimit()) {
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221 --tstate->recursion_depth;
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222 /* throw away the old exception... */
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223 Py_DECREF(*exc);
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224 Py_DECREF(*val);
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225 /* ... and use the recursion error instead */
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226 *exc = PyExc_RuntimeError;
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227 *val = PyExc_RecursionErrorInst;
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228 Py_INCREF(*exc);
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229 Py_INCREF(*val);
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230 /* just keeping the old traceback */
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231 return;
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232 }
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233 PyErr_NormalizeException(exc, val, tb);
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234 --tstate->recursion_depth;
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235 }
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236
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237
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238 void
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239 PyErr_Fetch(PyObject **p_type, PyObject **p_value, PyObject **p_traceback)
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240 {
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241 PyThreadState *tstate = PyThreadState_GET();
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242
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243 *p_type = tstate->curexc_type;
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244 *p_value = tstate->curexc_value;
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245 *p_traceback = tstate->curexc_traceback;
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246
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247 tstate->curexc_type = NULL;
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248 tstate->curexc_value = NULL;
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249 tstate->curexc_traceback = NULL;
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250 }
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251
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252 void
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253 PyErr_Clear(void)
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254 {
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255 PyErr_Restore(NULL, NULL, NULL);
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256 }
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257
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258 /* Convenience functions to set a type error exception and return 0 */
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259
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260 int
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261 PyErr_BadArgument(void)
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262 {
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263 PyErr_SetString(PyExc_TypeError,
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264 "bad argument type for built-in operation");
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265 return 0;
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266 }
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267
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268 PyObject *
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269 PyErr_NoMemory(void)
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270 {
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271 if (PyErr_ExceptionMatches(PyExc_MemoryError))
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272 /* already current */
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273 return NULL;
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274
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275 /* raise the pre-allocated instance if it still exists */
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276 if (PyExc_MemoryErrorInst)
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277 PyErr_SetObject(PyExc_MemoryError, PyExc_MemoryErrorInst);
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278 else
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279 /* this will probably fail since there's no memory and hee,
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280 hee, we have to instantiate this class
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281 */
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282 PyErr_SetNone(PyExc_MemoryError);
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283
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284 return NULL;
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285 }
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286
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287 PyObject *
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288 PyErr_SetFromErrnoWithFilenameObject(PyObject *exc, PyObject *filenameObject)
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289 {
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290 PyObject *v;
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291 char *s;
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292 int i = errno;
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293 #ifdef PLAN9
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294 char errbuf[ERRMAX];
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295 #endif
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296 #ifdef MS_WINDOWS
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297 char *s_buf = NULL;
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298 char s_small_buf[28]; /* Room for "Windows Error 0xFFFFFFFF" */
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299 #endif
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300 #ifdef EINTR
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301 if (i == EINTR && PyErr_CheckSignals())
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302 return NULL;
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303 #endif
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304 #ifdef PLAN9
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305 rerrstr(errbuf, sizeof errbuf);
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306 s = errbuf;
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307 #else
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308 if (i == 0)
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309 s = "Error"; /* Sometimes errno didn't get set */
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310 else
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311 #ifndef MS_WINDOWS
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312 s = strerror(i);
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313 #else
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314 {
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315 /* Note that the Win32 errors do not lineup with the
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316 errno error. So if the error is in the MSVC error
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317 table, we use it, otherwise we assume it really _is_
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318 a Win32 error code
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319 */
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320 if (i > 0 && i < _sys_nerr) {
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321 s = _sys_errlist[i];
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322 }
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323 else {
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324 int len = FormatMessage(
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325 FORMAT_MESSAGE_ALLOCATE_BUFFER |
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326 FORMAT_MESSAGE_FROM_SYSTEM |
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327 FORMAT_MESSAGE_IGNORE_INSERTS,
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328 NULL, /* no message source */
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329 i,
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330 MAKELANGID(LANG_NEUTRAL,
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331 SUBLANG_DEFAULT),
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332 /* Default language */
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333 (LPTSTR) &s_buf,
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334 0, /* size not used */
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335 NULL); /* no args */
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336 if (len==0) {
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337 /* Only ever seen this in out-of-mem
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338 situations */
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339 sprintf(s_small_buf, "Windows Error 0x%X", i);
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340 s = s_small_buf;
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341 s_buf = NULL;
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342 } else {
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343 s = s_buf;
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344 /* remove trailing cr/lf and dots */
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345 while (len > 0 && (s[len-1] <= ' ' || s[len-1] == '.'))
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346 s[--len] = '\0';
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347 }
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348 }
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349 }
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350 #endif /* Unix/Windows */
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351 #endif /* PLAN 9*/
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352 if (filenameObject != NULL)
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353 v = Py_BuildValue("(isO)", i, s, filenameObject);
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354 else
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355 v = Py_BuildValue("(is)", i, s);
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356 if (v != NULL) {
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357 PyErr_SetObject(exc, v);
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358 Py_DECREF(v);
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359 }
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360 #ifdef MS_WINDOWS
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361 LocalFree(s_buf);
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362 #endif
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363 return NULL;
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364 }
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365
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366
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367 PyObject *
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368 PyErr_SetFromErrnoWithFilename(PyObject *exc, char *filename)
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369 {
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370 PyObject *name = filename ? PyString_FromString(filename) : NULL;
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371 PyObject *result = PyErr_SetFromErrnoWithFilenameObject(exc, name);
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372 Py_XDECREF(name);
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373 return result;
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374 }
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375
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376 #ifdef Py_WIN_WIDE_FILENAMES
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377 PyObject *
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378 PyErr_SetFromErrnoWithUnicodeFilename(PyObject *exc, Py_UNICODE *filename)
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379 {
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380 PyObject *name = filename ?
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381 PyUnicode_FromUnicode(filename, wcslen(filename)) :
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382 NULL;
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383 PyObject *result = PyErr_SetFromErrnoWithFilenameObject(exc, name);
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384 Py_XDECREF(name);
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385 return result;
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386 }
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387 #endif /* Py_WIN_WIDE_FILENAMES */
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388
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389 PyObject *
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390 PyErr_SetFromErrno(PyObject *exc)
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391 {
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392 return PyErr_SetFromErrnoWithFilenameObject(exc, NULL);
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393 }
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394
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395 #ifdef MS_WINDOWS
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396 /* Windows specific error code handling */
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397 PyObject *PyErr_SetExcFromWindowsErrWithFilenameObject(
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398 PyObject *exc,
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399 int ierr,
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400 PyObject *filenameObject)
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401 {
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402 int len;
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403 char *s;
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404 char *s_buf = NULL; /* Free via LocalFree */
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405 char s_small_buf[28]; /* Room for "Windows Error 0xFFFFFFFF" */
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406 PyObject *v;
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407 DWORD err = (DWORD)ierr;
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408 if (err==0) err = GetLastError();
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409 len = FormatMessage(
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410 /* Error API error */
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411 FORMAT_MESSAGE_ALLOCATE_BUFFER |
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412 FORMAT_MESSAGE_FROM_SYSTEM |
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diff changeset
413 FORMAT_MESSAGE_IGNORE_INSERTS,
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414 NULL, /* no message source */
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415 err,
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416 MAKELANGID(LANG_NEUTRAL,
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417 SUBLANG_DEFAULT), /* Default language */
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418 (LPTSTR) &s_buf,
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419 0, /* size not used */
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420 NULL); /* no args */
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421 if (len==0) {
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422 /* Only seen this in out of mem situations */
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423 sprintf(s_small_buf, "Windows Error 0x%X", err);
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424 s = s_small_buf;
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425 s_buf = NULL;
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426 } else {
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427 s = s_buf;
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428 /* remove trailing cr/lf and dots */
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429 while (len > 0 && (s[len-1] <= ' ' || s[len-1] == '.'))
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430 s[--len] = '\0';
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431 }
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432 if (filenameObject != NULL)
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433 v = Py_BuildValue("(isO)", err, s, filenameObject);
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434 else
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435 v = Py_BuildValue("(is)", err, s);
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436 if (v != NULL) {
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437 PyErr_SetObject(exc, v);
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438 Py_DECREF(v);
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439 }
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440 LocalFree(s_buf);
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441 return NULL;
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442 }
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443
25535
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444 PyObject *PyErr_SetExcFromWindowsErrWithFilename(
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445 PyObject *exc,
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446 int ierr,
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447 const char *filename)
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448 {
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449 PyObject *name = filename ? PyString_FromString(filename) : NULL;
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450 PyObject *ret = PyErr_SetExcFromWindowsErrWithFilenameObject(exc,
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451 ierr,
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452 name);
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453 Py_XDECREF(name);
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454 return ret;
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455 }
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456
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457 #ifdef Py_WIN_WIDE_FILENAMES
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458 PyObject *PyErr_SetExcFromWindowsErrWithUnicodeFilename(
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459 PyObject *exc,
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460 int ierr,
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461 const Py_UNICODE *filename)
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462 {
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463 PyObject *name = filename ?
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464 PyUnicode_FromUnicode(filename, wcslen(filename)) :
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465 NULL;
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466 PyObject *ret = PyErr_SetExcFromWindowsErrWithFilenameObject(exc,
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467 ierr,
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468 name);
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469 Py_XDECREF(name);
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470 return ret;
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471 }
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472 #endif /* Py_WIN_WIDE_FILENAMES */
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473
24423
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474 PyObject *PyErr_SetExcFromWindowsErr(PyObject *exc, int ierr)
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parents: 24071
diff changeset
475 {
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476 return PyErr_SetExcFromWindowsErrWithFilename(exc, ierr, NULL);
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477 }
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parents: 24071
diff changeset
478
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479 PyObject *PyErr_SetFromWindowsErr(int ierr)
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480 {
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481 return PyErr_SetExcFromWindowsErrWithFilename(PyExc_WindowsError,
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482 ierr, NULL);
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483 }
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484 PyObject *PyErr_SetFromWindowsErrWithFilename(
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diff changeset
485 int ierr,
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486 const char *filename)
24423
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487 {
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488 PyObject *name = filename ? PyString_FromString(filename) : NULL;
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489 PyObject *result = PyErr_SetExcFromWindowsErrWithFilenameObject(
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490 PyExc_WindowsError,
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491 ierr, name);
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492 Py_XDECREF(name);
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493 return result;
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parents: 10638
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494 }
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495
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496 #ifdef Py_WIN_WIDE_FILENAMES
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497 PyObject *PyErr_SetFromWindowsErrWithUnicodeFilename(
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498 int ierr,
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499 const Py_UNICODE *filename)
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500 {
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501 PyObject *name = filename ?
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502 PyUnicode_FromUnicode(filename, wcslen(filename)) :
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503 NULL;
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504 PyObject *result = PyErr_SetExcFromWindowsErrWithFilenameObject(
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diff changeset
505 PyExc_WindowsError,
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diff changeset
506 ierr, name);
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507 Py_XDECREF(name);
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508 return result;
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parents: 24423
diff changeset
509 }
861065256487 Patch 594001: PEP 277 - Unicode file name support for Windows NT.
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diff changeset
510 #endif /* Py_WIN_WIDE_FILENAMES */
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diff changeset
511 #endif /* MS_WINDOWS */
fe960ad3db65 Patch by Mark Hammond:
Guido van Rossum <guido@python.org>
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diff changeset
512
22
2d3eb717a00d Added err_badcall().
Guido van Rossum <guido@python.org>
parents: 9
diff changeset
513 void
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Fred Drake <fdrake@acm.org>
parents: 14066
diff changeset
514 _PyErr_BadInternalCall(char *filename, int lineno)
019265b3a856 Improve the exceptions raised by PyErr_BadInternalCall(); adding the
Fred Drake <fdrake@acm.org>
parents: 14066
diff changeset
515 {
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516 PyErr_Format(PyExc_SystemError,
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diff changeset
517 "%s:%d: bad argument to internal function",
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diff changeset
518 filename, lineno);
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Fred Drake <fdrake@acm.org>
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519 }
019265b3a856 Improve the exceptions raised by PyErr_BadInternalCall(); adding the
Fred Drake <fdrake@acm.org>
parents: 14066
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520
019265b3a856 Improve the exceptions raised by PyErr_BadInternalCall(); adding the
Fred Drake <fdrake@acm.org>
parents: 14066
diff changeset
521 /* Remove the preprocessor macro for PyErr_BadInternalCall() so that we can
019265b3a856 Improve the exceptions raised by PyErr_BadInternalCall(); adding the
Fred Drake <fdrake@acm.org>
parents: 14066
diff changeset
522 export the entry point for existing object code: */
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Fred Drake <fdrake@acm.org>
parents: 14066
diff changeset
523 #undef PyErr_BadInternalCall
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Fred Drake <fdrake@acm.org>
parents: 14066
diff changeset
524 void
13658
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Thomas Wouters <thomas@python.org>
parents: 13578
diff changeset
525 PyErr_BadInternalCall(void)
22
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Guido van Rossum <guido@python.org>
parents: 9
diff changeset
526 {
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diff changeset
527 PyErr_Format(PyExc_SystemError,
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diff changeset
528 "bad argument to internal function");
22
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Guido van Rossum <guido@python.org>
parents: 9
diff changeset
529 }
14170
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Fred Drake <fdrake@acm.org>
parents: 14066
diff changeset
530 #define PyErr_BadInternalCall() _PyErr_BadInternalCall(__FILE__, __LINE__)
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Fred Drake <fdrake@acm.org>
parents: 14066
diff changeset
531
5105
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parents: 4654
diff changeset
532
00fd6857f76b Added convenience function PyErr_Format(exception, formatstring, ...) -> NULL.
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parents: 4654
diff changeset
533
00fd6857f76b Added convenience function PyErr_Format(exception, formatstring, ...) -> NULL.
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parents: 4654
diff changeset
534 PyObject *
00fd6857f76b Added convenience function PyErr_Format(exception, formatstring, ...) -> NULL.
Guido van Rossum <guido@python.org>
parents: 4654
diff changeset
535 PyErr_Format(PyObject *exception, const char *format, ...)
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Guido van Rossum <guido@python.org>
parents: 4654
diff changeset
536 {
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diff changeset
537 va_list vargs;
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diff changeset
538 PyObject* string;
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Jeremy Hylton <jeremy@alum.mit.edu>
parents: 14330
diff changeset
539
951eb3af3494 code part of patch #100895 by Fredrik Lundh
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parents: 14330
diff changeset
540 #ifdef HAVE_STDARG_PROTOTYPES
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diff changeset
541 va_start(vargs, format);
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Jeremy Hylton <jeremy@alum.mit.edu>
parents: 14330
diff changeset
542 #else
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diff changeset
543 va_start(vargs);
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Jeremy Hylton <jeremy@alum.mit.edu>
parents: 14330
diff changeset
544 #endif
5105
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Guido van Rossum <guido@python.org>
parents: 4654
diff changeset
545
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
546 string = PyString_FromFormatV(format, vargs);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
547 PyErr_SetObject(exception, string);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 52903
diff changeset
548 Py_XDECREF(string);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
549 va_end(vargs);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
550 return NULL;
5105
00fd6857f76b Added convenience function PyErr_Format(exception, formatstring, ...) -> NULL.
Guido van Rossum <guido@python.org>
parents: 4654
diff changeset
551 }
6319
b7f0b98f5325 New API PyErr_NewException(name, base, dict) to create simple new exceptions.
Guido van Rossum <guido@python.org>
parents: 6190
diff changeset
552
b7f0b98f5325 New API PyErr_NewException(name, base, dict) to create simple new exceptions.
Guido van Rossum <guido@python.org>
parents: 6190
diff changeset
553
38246
ee2139935a1d PyErr_NewException now accepts a tuple of base classes as its
Georg Brandl <georg@python.org>
parents: 37779
diff changeset
554
6319
b7f0b98f5325 New API PyErr_NewException(name, base, dict) to create simple new exceptions.
Guido van Rossum <guido@python.org>
parents: 6190
diff changeset
555 PyObject *
13658
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents: 13578
diff changeset
556 PyErr_NewException(char *name, PyObject *base, PyObject *dict)
6319
b7f0b98f5325 New API PyErr_NewException(name, base, dict) to create simple new exceptions.
Guido van Rossum <guido@python.org>
parents: 6190
diff changeset
557 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
558 char *dot;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
559 PyObject *modulename = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
560 PyObject *classname = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
561 PyObject *mydict = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
562 PyObject *bases = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
563 PyObject *result = NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
564 dot = strrchr(name, '.');
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
565 if (dot == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
566 PyErr_SetString(PyExc_SystemError,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
567 "PyErr_NewException: name must be module.class");
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
568 return NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
569 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
570 if (base == NULL)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
571 base = PyExc_Exception;
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parents: 52903
diff changeset
572 if (dict == NULL) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
573 dict = mydict = PyDict_New();
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
574 if (dict == NULL)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
575 goto failure;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
576 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
577 if (PyDict_GetItemString(dict, "__module__") == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
578 modulename = PyString_FromStringAndSize(name,
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
579 (Py_ssize_t)(dot-name));
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
580 if (modulename == NULL)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
581 goto failure;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
582 if (PyDict_SetItemString(dict, "__module__", modulename) != 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
583 goto failure;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
584 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
585 if (PyTuple_Check(base)) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
586 bases = base;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
587 /* INCREF as we create a new ref in the else branch */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
588 Py_INCREF(bases);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
589 } else {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
590 bases = PyTuple_Pack(1, base);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
591 if (bases == NULL)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
592 goto failure;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
593 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
594 /* Create a real new-style class. */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
595 result = PyObject_CallFunction((PyObject *)&PyType_Type, "sOO",
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
596 dot+1, bases, dict);
6319
b7f0b98f5325 New API PyErr_NewException(name, base, dict) to create simple new exceptions.
Guido van Rossum <guido@python.org>
parents: 6190
diff changeset
597 failure:
61465
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diff changeset
598 Py_XDECREF(bases);
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parents: 52903
diff changeset
599 Py_XDECREF(mydict);
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parents: 52903
diff changeset
600 Py_XDECREF(classname);
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parents: 52903
diff changeset
601 Py_XDECREF(modulename);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
602 return result;
6319
b7f0b98f5325 New API PyErr_NewException(name, base, dict) to create simple new exceptions.
Guido van Rossum <guido@python.org>
parents: 6190
diff changeset
603 }
14330
6dee1985c681 refactor __del__ exception handler into PyErr_WriteUnraisable
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 14170
diff changeset
604
6dee1985c681 refactor __del__ exception handler into PyErr_WriteUnraisable
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 14170
diff changeset
605 /* Call when an exception has occurred but there is no way for Python
6dee1985c681 refactor __del__ exception handler into PyErr_WriteUnraisable
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 14170
diff changeset
606 to handle it. Examples: exception in __del__ or during GC. */
6dee1985c681 refactor __del__ exception handler into PyErr_WriteUnraisable
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 14170
diff changeset
607 void
6dee1985c681 refactor __del__ exception handler into PyErr_WriteUnraisable
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 14170
diff changeset
608 PyErr_WriteUnraisable(PyObject *obj)
6dee1985c681 refactor __del__ exception handler into PyErr_WriteUnraisable
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 14170
diff changeset
609 {
61465
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diff changeset
610 PyObject *f, *t, *v, *tb;
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parents: 52903
diff changeset
611 PyErr_Fetch(&t, &v, &tb);
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parents: 52903
diff changeset
612 f = PySys_GetObject("stderr");
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parents: 52903
diff changeset
613 if (f != NULL) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
614 PyFile_WriteString("Exception ", f);
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parents: 52903
diff changeset
615 if (t) {
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parents: 52903
diff changeset
616 PyObject* moduleName;
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parents: 52903
diff changeset
617 char* className;
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parents: 52903
diff changeset
618 assert(PyExceptionClass_Check(t));
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parents: 52903
diff changeset
619 className = PyExceptionClass_Name(t);
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parents: 52903
diff changeset
620 if (className != NULL) {
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parents: 52903
diff changeset
621 char *dot = strrchr(className, '.');
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parents: 52903
diff changeset
622 if (dot != NULL)
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parents: 52903
diff changeset
623 className = dot+1;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
624 }
38455
1a23706139ca PyErr_Display(), PyErr_WriteUnraisable(): Coverity found a cut-and-paste
Tim Peters <tim.peters@gmail.com>
parents: 38431
diff changeset
625
61465
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diff changeset
626 moduleName = PyObject_GetAttrString(t, "__module__");
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parents: 52903
diff changeset
627 if (moduleName == NULL)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
628 PyFile_WriteString("<unknown>", f);
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parents: 52903
diff changeset
629 else {
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parents: 52903
diff changeset
630 char* modstr = PyString_AsString(moduleName);
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parents: 52903
diff changeset
631 if (modstr &&
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parents: 52903
diff changeset
632 strcmp(modstr, "exceptions") != 0)
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parents: 52903
diff changeset
633 {
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parents: 52903
diff changeset
634 PyFile_WriteString(modstr, f);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
635 PyFile_WriteString(".", f);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
636 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 52903
diff changeset
637 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
638 if (className == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
639 PyFile_WriteString("<unknown>", f);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
640 else
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
641 PyFile_WriteString(className, f);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
642 if (v && v != Py_None) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
643 PyFile_WriteString(": ", f);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
644 PyFile_WriteObject(v, f, 0);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
645 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
646 Py_XDECREF(moduleName);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
647 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
648 PyFile_WriteString(" in ", f);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
649 PyFile_WriteObject(obj, f, 0);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
650 PyFile_WriteString(" ignored\n", f);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
651 PyErr_Clear(); /* Just in case */
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parents: 52903
diff changeset
652 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
653 Py_XDECREF(t);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
654 Py_XDECREF(v);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
655 Py_XDECREF(tb);
14330
6dee1985c681 refactor __del__ exception handler into PyErr_WriteUnraisable
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 14170
diff changeset
656 }
15591
36286632ff3a Add PyErr_Warn().
Guido van Rossum <guido@python.org>
parents: 15318
diff changeset
657
30781
74747f62f286 Made function declaration a proper C prototype
Armin Rigo <arigo@tunes.org>
parents: 30683
diff changeset
658 extern PyObject *PyModule_GetWarningsModule(void);
15591
36286632ff3a Add PyErr_Warn().
Guido van Rossum <guido@python.org>
parents: 15318
diff changeset
659
16850
2d4da6cfee61 Add PyErr_WarnExplicit(), which calls warnings.warn_explicit(), with
Guido van Rossum <guido@python.org>
parents: 16838
diff changeset
660
22121
d4406fbfcb4e Patch #50002: Display line information for bad \x escapes:
Martin v. Löwis <martin@v.loewis.de>
parents: 20221
diff changeset
661 /* Set file and line information for the current exception.
d4406fbfcb4e Patch #50002: Display line information for bad \x escapes:
Martin v. Löwis <martin@v.loewis.de>
parents: 20221
diff changeset
662 If the exception is not a SyntaxError, also sets additional attributes
d4406fbfcb4e Patch #50002: Display line information for bad \x escapes:
Martin v. Löwis <martin@v.loewis.de>
parents: 20221
diff changeset
663 to make printing of exceptions believe it is a syntax error. */
16850
2d4da6cfee61 Add PyErr_WarnExplicit(), which calls warnings.warn_explicit(), with
Guido van Rossum <guido@python.org>
parents: 16838
diff changeset
664
16838
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 15591
diff changeset
665 void
26601
cc05c2c8660e Constify filenames and scripts. Fixes #651362.
Martin v. Löwis <martin@v.loewis.de>
parents: 25544
diff changeset
666 PyErr_SyntaxLocation(const char *filename, int lineno)
16838
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 15591
diff changeset
667 {
61465
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parents: 52903
diff changeset
668 PyObject *exc, *v, *tb, *tmp;
16838
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 15591
diff changeset
669
61465
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parents: 52903
diff changeset
670 /* add attributes for the line number and filename for the error */
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parents: 52903
diff changeset
671 PyErr_Fetch(&exc, &v, &tb);
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parents: 52903
diff changeset
672 PyErr_NormalizeException(&exc, &v, &tb);
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parents: 52903
diff changeset
673 /* XXX check that it is, indeed, a syntax error. It might not
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Antoine Pitrou <solipsis@pitrou.net>
parents: 52903
diff changeset
674 * be, though. */
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parents: 52903
diff changeset
675 tmp = PyInt_FromLong(lineno);
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parents: 52903
diff changeset
676 if (tmp == NULL)
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677 PyErr_Clear();
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678 else {
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679 if (PyObject_SetAttrString(v, "lineno", tmp))
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680 PyErr_Clear();
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681 Py_DECREF(tmp);
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682 }
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683 if (filename != NULL) {
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684 tmp = PyString_FromString(filename);
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685 if (tmp == NULL)
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686 PyErr_Clear();
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687 else {
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688 if (PyObject_SetAttrString(v, "filename", tmp))
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689 PyErr_Clear();
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690 Py_DECREF(tmp);
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691 }
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692
61465
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693 tmp = PyErr_ProgramText(filename, lineno);
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694 if (tmp) {
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695 if (PyObject_SetAttrString(v, "text", tmp))
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696 PyErr_Clear();
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697 Py_DECREF(tmp);
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698 }
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699 }
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700 if (PyObject_SetAttrString(v, "offset", Py_None)) {
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701 PyErr_Clear();
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702 }
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703 if (exc != PyExc_SyntaxError) {
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704 if (!PyObject_HasAttrString(v, "msg")) {
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705 tmp = PyObject_Str(v);
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706 if (tmp) {
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707 if (PyObject_SetAttrString(v, "msg", tmp))
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diff changeset
708 PyErr_Clear();
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709 Py_DECREF(tmp);
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710 } else {
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711 PyErr_Clear();
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712 }
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713 }
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714 if (!PyObject_HasAttrString(v, "print_file_and_line")) {
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715 if (PyObject_SetAttrString(v, "print_file_and_line",
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716 Py_None))
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717 PyErr_Clear();
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718 }
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719 }
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720 PyErr_Restore(exc, v, tb);
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721 }
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722
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723 /* com_fetch_program_text will attempt to load the line of text that
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
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diff changeset
724 the exception refers to. If it fails, it will return NULL but will
36751
8e04de2480e4 PEP 352 implementation. Creates a new base class, BaseException, which has an
Brett Cannon <bcannon@gmail.com>
parents: 36737
diff changeset
725 not set an exception.
16838
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726
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diff changeset
727 XXX The functionality of this function is quite similar to the
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
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728 functionality in tb_displayline() in traceback.c.
09f6c1372056 Improve SyntaxErrors for bad future statements. Set file and location
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diff changeset
729 */
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730
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731 PyObject *
26601
cc05c2c8660e Constify filenames and scripts. Fixes #651362.
Martin v. Löwis <martin@v.loewis.de>
parents: 25544
diff changeset
732 PyErr_ProgramText(const char *filename, int lineno)
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733 {
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734 FILE *fp;
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735 int i;
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736 char linebuf[1000];
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737
61465
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738 if (filename == NULL || *filename == '\0' || lineno <= 0)
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739 return NULL;
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740 fp = fopen(filename, "r" PY_STDIOTEXTMODE);
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741 if (fp == NULL)
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742 return NULL;
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743 for (i = 0; i < lineno; i++) {
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744 char *pLastChar = &linebuf[sizeof(linebuf) - 2];
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745 do {
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746 *pLastChar = '\0';
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747 if (Py_UniversalNewlineFgets(linebuf, sizeof linebuf, fp, NULL) == NULL)
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748 break;
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749 /* fgets read *something*; if it didn't get as
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diff changeset
750 far as pLastChar, it must have found a newline
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751 or hit the end of the file; if pLastChar is \n,
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752 it obviously found a newline; else we haven't
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753 yet seen a newline, so must continue */
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754 } while (*pLastChar != '\0' && *pLastChar != '\n');
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755 }
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756 fclose(fp);
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757 if (i == lineno) {
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758 char *p = linebuf;
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759 while (*p == ' ' || *p == '\t' || *p == '\014')
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760 p++;
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761 return PyString_FromString(p);
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762 }
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763 return NULL;
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764 }
37655
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Anthony Baxter <anthonybaxter@gmail.com>
parents: 36751
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765
2f3f2e32dfd9 spread the extern "C" { } magic pixie dust around. Python itself builds now
Anthony Baxter <anthonybaxter@gmail.com>
parents: 36751
diff changeset
766 #ifdef __cplusplus
2f3f2e32dfd9 spread the extern "C" { } magic pixie dust around. Python itself builds now
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767 }
2f3f2e32dfd9 spread the extern "C" { } magic pixie dust around. Python itself builds now
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768 #endif
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Anthony Baxter <anthonybaxter@gmail.com>
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769