Mercurial > cpython-lru_cache-weakref

annotate Python/errors.c @ 5979:422960523286 legacy-trunk

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Use strerror on the mac if using MSL (Jack).
author Guido van Rossum <guido@python.org>
date Tue, 12 Aug 1997 14:51:52 +0000
parents b7871ca930ad
children a2a1df0ca808
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1 /***********************************************************
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2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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3 The Netherlands.
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4
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5 All Rights Reserved
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6
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7 Permission to use, copy, modify, and distribute this software and its
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8 documentation for any purpose and without fee is hereby granted,
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9 provided that the above copyright notice appear in all copies and that
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10 both that copyright notice and this permission notice appear in
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11 supporting documentation, and that the names of Stichting Mathematisch
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12 Centrum or CWI or Corporation for National Research Initiatives or
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13 CNRI not be used in advertising or publicity pertaining to
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14 distribution of the software without specific, written prior
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15 permission.
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16
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17 While CWI is the initial source for this software, a modified version
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18 is made available by the Corporation for National Research Initiatives
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19 (CNRI) at the Internet address ftp://ftp.python.org.
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20
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21 STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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22 REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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23 MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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24 CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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25 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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26 PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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27 TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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28 PERFORMANCE OF THIS SOFTWARE.
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29
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30 ******************************************************************/
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31
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32 /* Error handling */
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33
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34 #include "Python.h"
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35
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36 #ifdef SYMANTEC__CFM68K__
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37 #pragma lib_export on
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38 #endif
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39
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40 #ifdef macintosh
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41 extern char *PyMac_StrError Py_PROTO((int));
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42 #undef strerror
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43 #define strerror PyMac_StrError
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44 #endif /* macintosh */
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45
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46 #ifndef __STDC__
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47 #ifndef MS_WINDOWS
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48 extern char *strerror Py_PROTO((int));
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49 #endif
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50 #endif
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51
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52 void
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53 PyErr_Restore(type, value, traceback)
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54 PyObject *type;
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55 PyObject *value;
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56 PyObject *traceback;
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57 {
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58 PyThreadState *tstate = PyThreadState_Get();
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59 PyObject *oldtype, *oldvalue, *oldtraceback;
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60
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61 if (traceback != NULL && !PyTraceBack_Check(traceback)) {
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62 /* XXX Should never happen -- fatal error instead? */
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63 Py_DECREF(traceback);
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64 traceback = NULL;
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65 }
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66
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67 /* Save these in locals to safeguard against recursive
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68 invocation through Py_XDECREF */
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69 oldtype = tstate->curexc_type;
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70 oldvalue = tstate->curexc_value;
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71 oldtraceback = tstate->curexc_traceback;
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72
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73 tstate->curexc_type = type;
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74 tstate->curexc_value = value;
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75 tstate->curexc_traceback = traceback;
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76
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77 Py_XDECREF(oldtype);
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78 Py_XDECREF(oldvalue);
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79 Py_XDECREF(oldtraceback);
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80 }
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81
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82 void
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83 PyErr_SetObject(exception, value)
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84 PyObject *exception;
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85 PyObject *value;
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86 {
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87 Py_XINCREF(exception);
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88 Py_XINCREF(value);
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89 PyErr_Restore(exception, value, (PyObject *)NULL);
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90 }
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91
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92 void
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93 PyErr_SetNone(exception)
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94 PyObject *exception;
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95 {
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96 PyErr_SetObject(exception, (PyObject *)NULL);
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97 }
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98
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99 void
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100 PyErr_SetString(exception, string)
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101 PyObject *exception;
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102 const char *string;
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103 {
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104 PyObject *value = PyString_FromString(string);
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105 PyErr_SetObject(exception, value);
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106 Py_XDECREF(value);
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107 }
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108
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109
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110 PyObject *
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111 PyErr_Occurred()
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112 {
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113 PyThreadState *tstate = PyThreadState_Get();
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114
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115 return tstate->curexc_type;
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116 }
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117
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118 void
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119 PyErr_Fetch(p_type, p_value, p_traceback)
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120 PyObject **p_type;
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121 PyObject **p_value;
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122 PyObject **p_traceback;
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123 {
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124 PyThreadState *tstate = PyThreadState_Get();
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125
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126 *p_type = tstate->curexc_type;
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127 *p_value = tstate->curexc_value;
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128 *p_traceback = tstate->curexc_traceback;
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129
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130 tstate->curexc_type = NULL;
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131 tstate->curexc_value = NULL;
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132 tstate->curexc_traceback = NULL;
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133 }
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135 void
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136 PyErr_Clear()
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137 {
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138 PyErr_Restore(NULL, NULL, NULL);
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139 }
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140
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141 /* Convenience functions to set a type error exception and return 0 */
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142
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143 int
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144 PyErr_BadArgument()
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145 {
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146 PyErr_SetString(PyExc_TypeError,
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147 "illegal argument type for built-in operation");
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148 return 0;
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149 }
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150
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151 PyObject *
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152 PyErr_NoMemory()
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153 {
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154 PyErr_SetNone(PyExc_MemoryError);
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155 return NULL;
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156 }
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157
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158 PyObject *
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159 PyErr_SetFromErrno(exc)
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160 PyObject *exc;
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161 {
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162 PyObject *v;
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163 int i = errno;
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164 #ifdef EINTR
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165 if (i == EINTR && PyErr_CheckSignals())
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166 return NULL;
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167 #endif
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168 v = Py_BuildValue("(is)", i, strerror(i));
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169 if (v != NULL) {
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170 PyErr_SetObject(exc, v);
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171 Py_DECREF(v);
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172 }
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173 return NULL;
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174 }
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175
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176 void
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177 PyErr_BadInternalCall()
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178 {
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179 PyErr_SetString(PyExc_SystemError,
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180 "bad argument to internal function");
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181 }
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182
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183
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184 #ifdef HAVE_STDARG_PROTOTYPES
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185 PyObject *
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186 PyErr_Format(PyObject *exception, const char *format, ...)
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187 #else
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188 PyObject *
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189 PyErr_Format(exception, format, va_alist)
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190 PyObject *exception;
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191 const char *format;
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192 va_dcl
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193 #endif
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194 {
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195 va_list vargs;
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196 char buffer[500]; /* Caller is responsible for limiting the format */
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197
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198 #ifdef HAVE_STDARG_PROTOTYPES
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199 va_start(vargs, format);
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200 #else
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201 va_start(vargs);
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202 #endif
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203
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204 vsprintf(buffer, format, vargs);
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205 PyErr_SetString(exception, buffer);
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206 return NULL;
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207 }