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085358a3e2
PyErr_SetExcFromWindowsErr(), PyErr_SetExcFromWindowsErrWithFilename(). Similar to PyErr_SetFromWindowsErrWithFilename() and PyErr_SetFromWindowsErr(), but they allow to specify the exception type to raise. Available on Windows. See SF patch #576458.
688 lines
15 KiB
C
688 lines
15 KiB
C
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/* Error handling */
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#include "Python.h"
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#ifdef macintosh
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extern char *PyMac_StrError(int);
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#undef strerror
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#define strerror PyMac_StrError
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#endif /* macintosh */
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#ifndef __STDC__
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#ifndef MS_WINDOWS
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extern char *strerror(int);
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#endif
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#endif
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#ifdef MS_WINDOWS
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#include "windows.h"
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#include "winbase.h"
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#endif
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#include <ctype.h>
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void
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PyErr_Restore(PyObject *type, PyObject *value, PyObject *traceback)
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{
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PyThreadState *tstate = PyThreadState_GET();
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PyObject *oldtype, *oldvalue, *oldtraceback;
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if (traceback != NULL && !PyTraceBack_Check(traceback)) {
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/* XXX Should never happen -- fatal error instead? */
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Py_DECREF(traceback);
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traceback = NULL;
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}
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/* Save these in locals to safeguard against recursive
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invocation through Py_XDECREF */
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oldtype = tstate->curexc_type;
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oldvalue = tstate->curexc_value;
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oldtraceback = tstate->curexc_traceback;
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tstate->curexc_type = type;
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tstate->curexc_value = value;
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tstate->curexc_traceback = traceback;
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Py_XDECREF(oldtype);
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Py_XDECREF(oldvalue);
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Py_XDECREF(oldtraceback);
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}
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void
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PyErr_SetObject(PyObject *exception, PyObject *value)
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{
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Py_XINCREF(exception);
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Py_XINCREF(value);
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PyErr_Restore(exception, value, (PyObject *)NULL);
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}
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void
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PyErr_SetNone(PyObject *exception)
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{
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PyErr_SetObject(exception, (PyObject *)NULL);
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}
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void
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PyErr_SetString(PyObject *exception, const char *string)
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{
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PyObject *value = PyString_FromString(string);
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PyErr_SetObject(exception, value);
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Py_XDECREF(value);
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}
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PyObject *
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PyErr_Occurred(void)
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{
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PyThreadState *tstate = PyThreadState_GET();
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return tstate->curexc_type;
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}
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int
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PyErr_GivenExceptionMatches(PyObject *err, PyObject *exc)
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{
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if (err == NULL || exc == NULL) {
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/* maybe caused by "import exceptions" that failed early on */
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return 0;
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}
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if (PyTuple_Check(exc)) {
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int i, n;
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n = PyTuple_Size(exc);
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for (i = 0; i < n; i++) {
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/* Test recursively */
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if (PyErr_GivenExceptionMatches(
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err, PyTuple_GET_ITEM(exc, i)))
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{
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return 1;
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}
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}
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return 0;
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}
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/* err might be an instance, so check its class. */
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if (PyInstance_Check(err))
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err = (PyObject*)((PyInstanceObject*)err)->in_class;
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if (PyClass_Check(err) && PyClass_Check(exc))
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return PyClass_IsSubclass(err, exc);
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return err == exc;
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}
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int
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PyErr_ExceptionMatches(PyObject *exc)
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{
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return PyErr_GivenExceptionMatches(PyErr_Occurred(), exc);
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}
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/* Used in many places to normalize a raised exception, including in
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eval_code2(), do_raise(), and PyErr_Print()
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*/
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void
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PyErr_NormalizeException(PyObject **exc, PyObject **val, PyObject **tb)
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{
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PyObject *type = *exc;
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PyObject *value = *val;
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PyObject *inclass = NULL;
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PyObject *initial_tb = NULL;
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if (type == NULL) {
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/* This is a bug. Should never happen. Don't dump core. */
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PyErr_SetString(PyExc_SystemError,
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"PyErr_NormalizeException() called without exception");
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}
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/* If PyErr_SetNone() was used, the value will have been actually
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set to NULL.
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*/
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if (!value) {
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value = Py_None;
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Py_INCREF(value);
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}
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if (PyInstance_Check(value))
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inclass = (PyObject*)((PyInstanceObject*)value)->in_class;
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/* Normalize the exception so that if the type is a class, the
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value will be an instance.
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*/
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if (PyClass_Check(type)) {
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/* if the value was not an instance, or is not an instance
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whose class is (or is derived from) type, then use the
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value as an argument to instantiation of the type
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class.
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*/
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if (!inclass || !PyClass_IsSubclass(inclass, type)) {
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PyObject *args, *res;
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if (value == Py_None)
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args = Py_BuildValue("()");
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else if (PyTuple_Check(value)) {
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Py_INCREF(value);
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args = value;
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}
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else
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args = Py_BuildValue("(O)", value);
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if (args == NULL)
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goto finally;
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res = PyEval_CallObject(type, args);
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Py_DECREF(args);
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if (res == NULL)
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goto finally;
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Py_DECREF(value);
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value = res;
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}
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/* if the class of the instance doesn't exactly match the
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class of the type, believe the instance
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*/
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else if (inclass != type) {
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Py_DECREF(type);
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type = inclass;
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Py_INCREF(type);
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}
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}
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*exc = type;
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*val = value;
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return;
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finally:
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Py_DECREF(type);
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Py_DECREF(value);
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/* If the new exception doesn't set a traceback and the old
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exception had a traceback, use the old traceback for the
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new exception. It's better than nothing.
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*/
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initial_tb = *tb;
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PyErr_Fetch(exc, val, tb);
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if (initial_tb != NULL) {
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if (*tb == NULL)
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*tb = initial_tb;
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else
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Py_DECREF(initial_tb);
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}
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/* normalize recursively */
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PyErr_NormalizeException(exc, val, tb);
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}
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void
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PyErr_Fetch(PyObject **p_type, PyObject **p_value, PyObject **p_traceback)
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{
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PyThreadState *tstate = PyThreadState_Get();
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*p_type = tstate->curexc_type;
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*p_value = tstate->curexc_value;
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*p_traceback = tstate->curexc_traceback;
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tstate->curexc_type = NULL;
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tstate->curexc_value = NULL;
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tstate->curexc_traceback = NULL;
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}
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void
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PyErr_Clear(void)
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{
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PyErr_Restore(NULL, NULL, NULL);
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}
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/* Convenience functions to set a type error exception and return 0 */
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int
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PyErr_BadArgument(void)
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{
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PyErr_SetString(PyExc_TypeError,
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"bad argument type for built-in operation");
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return 0;
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}
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PyObject *
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PyErr_NoMemory(void)
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{
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if (PyErr_ExceptionMatches(PyExc_MemoryError))
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/* already current */
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return NULL;
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/* raise the pre-allocated instance if it still exists */
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if (PyExc_MemoryErrorInst)
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PyErr_SetObject(PyExc_MemoryError, PyExc_MemoryErrorInst);
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else
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/* this will probably fail since there's no memory and hee,
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hee, we have to instantiate this class
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*/
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PyErr_SetNone(PyExc_MemoryError);
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return NULL;
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}
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PyObject *
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PyErr_SetFromErrnoWithFilename(PyObject *exc, char *filename)
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{
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PyObject *v;
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char *s;
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int i = errno;
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#ifdef PLAN9
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char errbuf[ERRMAX];
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#endif
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#ifdef MS_WINDOWS
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char *s_buf = NULL;
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#endif
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#ifdef EINTR
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if (i == EINTR && PyErr_CheckSignals())
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return NULL;
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#endif
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#ifdef PLAN9
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rerrstr(errbuf, sizeof errbuf);
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s = errbuf;
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#else
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if (i == 0)
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s = "Error"; /* Sometimes errno didn't get set */
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else
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#ifndef MS_WINDOWS
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s = strerror(i);
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#else
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{
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/* Note that the Win32 errors do not lineup with the
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errno error. So if the error is in the MSVC error
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table, we use it, otherwise we assume it really _is_
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a Win32 error code
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*/
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if (i > 0 && i < _sys_nerr) {
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s = _sys_errlist[i];
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}
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else {
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int len = FormatMessage(
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FORMAT_MESSAGE_ALLOCATE_BUFFER |
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FORMAT_MESSAGE_FROM_SYSTEM |
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FORMAT_MESSAGE_IGNORE_INSERTS,
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NULL, /* no message source */
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i,
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MAKELANGID(LANG_NEUTRAL,
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SUBLANG_DEFAULT),
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/* Default language */
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(LPTSTR) &s_buf,
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0, /* size not used */
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NULL); /* no args */
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s = s_buf;
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/* remove trailing cr/lf and dots */
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while (len > 0 && (s[len-1] <= ' ' || s[len-1] == '.'))
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s[--len] = '\0';
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}
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}
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#endif /* Unix/Windows */
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#endif /* PLAN 9*/
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if (filename != NULL)
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v = Py_BuildValue("(iss)", i, s, filename);
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else
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v = Py_BuildValue("(is)", i, s);
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if (v != NULL) {
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PyErr_SetObject(exc, v);
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Py_DECREF(v);
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}
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#ifdef MS_WINDOWS
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LocalFree(s_buf);
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#endif
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return NULL;
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}
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PyObject *
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PyErr_SetFromErrno(PyObject *exc)
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{
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return PyErr_SetFromErrnoWithFilename(exc, NULL);
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}
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#ifdef MS_WINDOWS
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/* Windows specific error code handling */
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PyObject *PyErr_SetExcFromWindowsErrWithFilename(
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PyObject *exc,
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int ierr,
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const char *filename)
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{
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int len;
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char *s;
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PyObject *v;
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DWORD err = (DWORD)ierr;
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if (err==0) err = GetLastError();
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len = FormatMessage(
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/* Error API error */
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FORMAT_MESSAGE_ALLOCATE_BUFFER |
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FORMAT_MESSAGE_FROM_SYSTEM |
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FORMAT_MESSAGE_IGNORE_INSERTS,
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NULL, /* no message source */
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err,
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MAKELANGID(LANG_NEUTRAL,
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SUBLANG_DEFAULT), /* Default language */
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(LPTSTR) &s,
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0, /* size not used */
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NULL); /* no args */
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/* remove trailing cr/lf and dots */
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while (len > 0 && (s[len-1] <= ' ' || s[len-1] == '.'))
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s[--len] = '\0';
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if (filename != NULL)
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v = Py_BuildValue("(iss)", err, s, filename);
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else
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v = Py_BuildValue("(is)", err, s);
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if (v != NULL) {
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PyErr_SetObject(exc, v);
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Py_DECREF(v);
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}
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LocalFree(s);
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return NULL;
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}
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PyObject *PyErr_SetExcFromWindowsErr(PyObject *exc, int ierr)
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{
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return PyErr_SetExcFromWindowsErrWithFilename(exc, ierr, NULL);
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}
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PyObject *PyErr_SetFromWindowsErr(int ierr)
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{
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return PyErr_SetExcFromWindowsErrWithFilename(PyExc_WindowsError,
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ierr, NULL);
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}
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PyObject *PyErr_SetFromWindowsErrWithFilename(
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int ierr,
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const char *filename)
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{
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return PyErr_SetExcFromWindowsErrWithFilename(PyExc_WindowsError,
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ierr, filename);
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}
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#endif /* MS_WINDOWS */
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void
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_PyErr_BadInternalCall(char *filename, int lineno)
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{
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PyErr_Format(PyExc_SystemError,
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"%s:%d: bad argument to internal function",
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filename, lineno);
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}
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/* Remove the preprocessor macro for PyErr_BadInternalCall() so that we can
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export the entry point for existing object code: */
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#undef PyErr_BadInternalCall
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void
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PyErr_BadInternalCall(void)
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{
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PyErr_Format(PyExc_SystemError,
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"bad argument to internal function");
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}
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#define PyErr_BadInternalCall() _PyErr_BadInternalCall(__FILE__, __LINE__)
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PyObject *
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PyErr_Format(PyObject *exception, const char *format, ...)
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{
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va_list vargs;
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PyObject* string;
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#ifdef HAVE_STDARG_PROTOTYPES
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va_start(vargs, format);
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#else
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va_start(vargs);
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#endif
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string = PyString_FromFormatV(format, vargs);
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PyErr_SetObject(exception, string);
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Py_XDECREF(string);
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va_end(vargs);
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return NULL;
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}
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PyObject *
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PyErr_NewException(char *name, PyObject *base, PyObject *dict)
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{
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char *dot;
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PyObject *modulename = NULL;
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PyObject *classname = NULL;
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PyObject *mydict = NULL;
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PyObject *bases = NULL;
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PyObject *result = NULL;
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dot = strrchr(name, '.');
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if (dot == NULL) {
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PyErr_SetString(PyExc_SystemError,
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"PyErr_NewException: name must be module.class");
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return NULL;
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}
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if (base == NULL)
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base = PyExc_Exception;
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if (!PyClass_Check(base)) {
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/* Must be using string-based standard exceptions (-X) */
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return PyString_FromString(name);
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}
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if (dict == NULL) {
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dict = mydict = PyDict_New();
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if (dict == NULL)
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goto failure;
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}
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if (PyDict_GetItemString(dict, "__module__") == NULL) {
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modulename = PyString_FromStringAndSize(name, (int)(dot-name));
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if (modulename == NULL)
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goto failure;
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if (PyDict_SetItemString(dict, "__module__", modulename) != 0)
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goto failure;
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}
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classname = PyString_FromString(dot+1);
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if (classname == NULL)
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goto failure;
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bases = Py_BuildValue("(O)", base);
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if (bases == NULL)
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goto failure;
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result = PyClass_New(bases, dict, classname);
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failure:
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Py_XDECREF(bases);
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Py_XDECREF(mydict);
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Py_XDECREF(classname);
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Py_XDECREF(modulename);
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return result;
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}
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/* Call when an exception has occurred but there is no way for Python
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to handle it. Examples: exception in __del__ or during GC. */
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void
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PyErr_WriteUnraisable(PyObject *obj)
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{
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PyObject *f, *t, *v, *tb;
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PyErr_Fetch(&t, &v, &tb);
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f = PySys_GetObject("stderr");
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if (f != NULL) {
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PyFile_WriteString("Exception ", f);
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if (t) {
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PyFile_WriteObject(t, f, Py_PRINT_RAW);
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if (v && v != Py_None) {
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PyFile_WriteString(": ", f);
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PyFile_WriteObject(v, f, 0);
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}
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}
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PyFile_WriteString(" in ", f);
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PyFile_WriteObject(obj, f, 0);
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PyFile_WriteString(" ignored\n", f);
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PyErr_Clear(); /* Just in case */
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}
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Py_XDECREF(t);
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Py_XDECREF(v);
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Py_XDECREF(tb);
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}
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/* Function to issue a warning message; may raise an exception. */
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int
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PyErr_Warn(PyObject *category, char *message)
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{
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PyObject *mod, *dict, *func = NULL;
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mod = PyImport_ImportModule("warnings");
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if (mod != NULL) {
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dict = PyModule_GetDict(mod);
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func = PyDict_GetItemString(dict, "warn");
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Py_DECREF(mod);
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}
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if (func == NULL) {
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PySys_WriteStderr("warning: %s\n", message);
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return 0;
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}
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else {
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PyObject *args, *res;
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if (category == NULL)
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category = PyExc_RuntimeWarning;
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args = Py_BuildValue("(sO)", message, category);
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if (args == NULL)
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return -1;
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res = PyEval_CallObject(func, args);
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Py_DECREF(args);
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if (res == NULL)
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return -1;
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Py_DECREF(res);
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return 0;
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}
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}
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/* Warning with explicit origin */
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int
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PyErr_WarnExplicit(PyObject *category, char *message,
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char *filename, int lineno,
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char *module, PyObject *registry)
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{
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PyObject *mod, *dict, *func = NULL;
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mod = PyImport_ImportModule("warnings");
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if (mod != NULL) {
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dict = PyModule_GetDict(mod);
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func = PyDict_GetItemString(dict, "warn_explicit");
|
|
Py_DECREF(mod);
|
|
}
|
|
if (func == NULL) {
|
|
PySys_WriteStderr("warning: %s\n", message);
|
|
return 0;
|
|
}
|
|
else {
|
|
PyObject *args, *res;
|
|
|
|
if (category == NULL)
|
|
category = PyExc_RuntimeWarning;
|
|
if (registry == NULL)
|
|
registry = Py_None;
|
|
args = Py_BuildValue("(sOsizO)", message, category,
|
|
filename, lineno, module, registry);
|
|
if (args == NULL)
|
|
return -1;
|
|
res = PyEval_CallObject(func, args);
|
|
Py_DECREF(args);
|
|
if (res == NULL)
|
|
return -1;
|
|
Py_DECREF(res);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
|
|
/* Set file and line information for the current exception.
|
|
If the exception is not a SyntaxError, also sets additional attributes
|
|
to make printing of exceptions believe it is a syntax error. */
|
|
|
|
void
|
|
PyErr_SyntaxLocation(char *filename, int lineno)
|
|
{
|
|
PyObject *exc, *v, *tb, *tmp;
|
|
|
|
/* add attributes for the line number and filename for the error */
|
|
PyErr_Fetch(&exc, &v, &tb);
|
|
PyErr_NormalizeException(&exc, &v, &tb);
|
|
/* XXX check that it is, indeed, a syntax error */
|
|
tmp = PyInt_FromLong(lineno);
|
|
if (tmp == NULL)
|
|
PyErr_Clear();
|
|
else {
|
|
if (PyObject_SetAttrString(v, "lineno", tmp))
|
|
PyErr_Clear();
|
|
Py_DECREF(tmp);
|
|
}
|
|
if (filename != NULL) {
|
|
tmp = PyString_FromString(filename);
|
|
if (tmp == NULL)
|
|
PyErr_Clear();
|
|
else {
|
|
if (PyObject_SetAttrString(v, "filename", tmp))
|
|
PyErr_Clear();
|
|
Py_DECREF(tmp);
|
|
}
|
|
|
|
tmp = PyErr_ProgramText(filename, lineno);
|
|
if (tmp) {
|
|
PyObject_SetAttrString(v, "text", tmp);
|
|
Py_DECREF(tmp);
|
|
}
|
|
}
|
|
if (PyObject_SetAttrString(v, "offset", Py_None)) {
|
|
PyErr_Clear();
|
|
}
|
|
if (exc != PyExc_SyntaxError) {
|
|
if (!PyObject_HasAttrString(v, "msg")) {
|
|
tmp = PyObject_Str(v);
|
|
if (tmp) {
|
|
if (PyObject_SetAttrString(v, "msg", tmp))
|
|
PyErr_Clear();
|
|
Py_DECREF(tmp);
|
|
} else {
|
|
PyErr_Clear();
|
|
}
|
|
}
|
|
if (!PyObject_HasAttrString(v, "print_file_and_line")) {
|
|
if (PyObject_SetAttrString(v, "print_file_and_line",
|
|
Py_None))
|
|
PyErr_Clear();
|
|
}
|
|
}
|
|
PyErr_Restore(exc, v, tb);
|
|
}
|
|
|
|
/* com_fetch_program_text will attempt to load the line of text that
|
|
the exception refers to. If it fails, it will return NULL but will
|
|
not set an exception.
|
|
|
|
XXX The functionality of this function is quite similar to the
|
|
functionality in tb_displayline() in traceback.c.
|
|
*/
|
|
|
|
PyObject *
|
|
PyErr_ProgramText(char *filename, int lineno)
|
|
{
|
|
FILE *fp;
|
|
int i;
|
|
char linebuf[1000];
|
|
|
|
if (filename == NULL || lineno <= 0)
|
|
return NULL;
|
|
fp = fopen(filename, "r" PY_STDIOTEXTMODE);
|
|
if (fp == NULL)
|
|
return NULL;
|
|
for (i = 0; i < lineno; i++) {
|
|
char *pLastChar = &linebuf[sizeof(linebuf) - 2];
|
|
do {
|
|
*pLastChar = '\0';
|
|
if (Py_UniversalNewlineFgets(linebuf, sizeof linebuf, fp, NULL) == NULL)
|
|
break;
|
|
/* fgets read *something*; if it didn't get as
|
|
far as pLastChar, it must have found a newline
|
|
or hit the end of the file; if pLastChar is \n,
|
|
it obviously found a newline; else we haven't
|
|
yet seen a newline, so must continue */
|
|
} while (*pLastChar != '\0' && *pLastChar != '\n');
|
|
}
|
|
fclose(fp);
|
|
if (i == lineno) {
|
|
char *p = linebuf;
|
|
while (*p == ' ' || *p == '\t' || *p == '\014')
|
|
p++;
|
|
return PyString_FromString(p);
|
|
}
|
|
return NULL;
|
|
}
|