[mirror_edk2.git] / AppPkg / Applications / Python / Python-2.7.2 / Python / errors.c

\r
/* Error handling */\r
\r
#include "Python.h"\r
\r
#ifndef __STDC__\r
#ifndef MS_WINDOWS\r
extern char *strerror(int);\r
#endif\r
#endif\r
\r
#ifdef MS_WINDOWS\r
#include "windows.h"\r
#include "winbase.h"\r
#endif\r
\r
#include <ctype.h>\r
\r
#ifdef __cplusplus\r
extern "C" {\r
#endif\r
\r
\r
void\r
PyErr_Restore(PyObject *type, PyObject *value, PyObject *traceback)\r
{\r
    PyThreadState *tstate = PyThreadState_GET();\r
    PyObject *oldtype, *oldvalue, *oldtraceback;\r
\r
    if (traceback != NULL && !PyTraceBack_Check(traceback)) {\r
        /* XXX Should never happen -- fatal error instead? */\r
        /* Well, it could be None. */\r
        Py_DECREF(traceback);\r
        traceback = NULL;\r
    }\r
\r
    /* Save these in locals to safeguard against recursive\r
       invocation through Py_XDECREF */\r
    oldtype = tstate->curexc_type;\r
    oldvalue = tstate->curexc_value;\r
    oldtraceback = tstate->curexc_traceback;\r
\r
    tstate->curexc_type = type;\r
    tstate->curexc_value = value;\r
    tstate->curexc_traceback = traceback;\r
\r
    Py_XDECREF(oldtype);\r
    Py_XDECREF(oldvalue);\r
    Py_XDECREF(oldtraceback);\r
}\r
\r
void\r
PyErr_SetObject(PyObject *exception, PyObject *value)\r
{\r
    Py_XINCREF(exception);\r
    Py_XINCREF(value);\r
    PyErr_Restore(exception, value, (PyObject *)NULL);\r
}\r
\r
void\r
PyErr_SetNone(PyObject *exception)\r
{\r
    PyErr_SetObject(exception, (PyObject *)NULL);\r
}\r
\r
void\r
PyErr_SetString(PyObject *exception, const char *string)\r
{\r
    PyObject *value = PyString_FromString(string);\r
    PyErr_SetObject(exception, value);\r
    Py_XDECREF(value);\r
}\r
\r
\r
PyObject *\r
PyErr_Occurred(void)\r
{\r
    PyThreadState *tstate = PyThreadState_GET();\r
\r
    return tstate->curexc_type;\r
}\r
\r
\r
int\r
PyErr_GivenExceptionMatches(PyObject *err, PyObject *exc)\r
{\r
    if (err == NULL || exc == NULL) {\r
        /* maybe caused by "import exceptions" that failed early on */\r
        return 0;\r
    }\r
    if (PyTuple_Check(exc)) {\r
        Py_ssize_t i, n;\r
        n = PyTuple_Size(exc);\r
        for (i = 0; i < n; i++) {\r
            /* Test recursively */\r
             if (PyErr_GivenExceptionMatches(\r
                 err, PyTuple_GET_ITEM(exc, i)))\r
             {\r
                 return 1;\r
             }\r
        }\r
        return 0;\r
    }\r
    /* err might be an instance, so check its class. */\r
    if (PyExceptionInstance_Check(err))\r
        err = PyExceptionInstance_Class(err);\r
\r
    if (PyExceptionClass_Check(err) && PyExceptionClass_Check(exc)) {\r
        int res = 0, reclimit;\r
        PyObject *exception, *value, *tb;\r
        PyErr_Fetch(&exception, &value, &tb);\r
        /* Temporarily bump the recursion limit, so that in the most\r
           common case PyObject_IsSubclass will not raise a recursion\r
           error we have to ignore anyway. */\r
        reclimit = Py_GetRecursionLimit();\r
        Py_SetRecursionLimit(reclimit + 5);\r
        res = PyObject_IsSubclass(err, exc);\r
        Py_SetRecursionLimit(reclimit);\r
        /* This function must not fail, so print the error here */\r
        if (res == -1) {\r
            PyErr_WriteUnraisable(err);\r
            res = 0;\r
        }\r
        PyErr_Restore(exception, value, tb);\r
        return res;\r
    }\r
\r
    return err == exc;\r
}\r
\r
\r
int\r
PyErr_ExceptionMatches(PyObject *exc)\r
{\r
    return PyErr_GivenExceptionMatches(PyErr_Occurred(), exc);\r
}\r
\r
\r
/* Used in many places to normalize a raised exception, including in\r
   eval_code2(), do_raise(), and PyErr_Print()\r
*/\r
void\r
PyErr_NormalizeException(PyObject **exc, PyObject **val, PyObject **tb)\r
{\r
    PyObject *type = *exc;\r
    PyObject *value = *val;\r
    PyObject *inclass = NULL;\r
    PyObject *initial_tb = NULL;\r
    PyThreadState *tstate = NULL;\r
\r
    if (type == NULL) {\r
        /* There was no exception, so nothing to do. */\r
        return;\r
    }\r
\r
    /* If PyErr_SetNone() was used, the value will have been actually\r
       set to NULL.\r
    */\r
    if (!value) {\r
        value = Py_None;\r
        Py_INCREF(value);\r
    }\r
\r
    if (PyExceptionInstance_Check(value))\r
        inclass = PyExceptionInstance_Class(value);\r
\r
    /* Normalize the exception so that if the type is a class, the\r
       value will be an instance.\r
    */\r
    if (PyExceptionClass_Check(type)) {\r
        /* if the value was not an instance, or is not an instance\r
           whose class is (or is derived from) type, then use the\r
           value as an argument to instantiation of the type\r
           class.\r
        */\r
        if (!inclass || !PyObject_IsSubclass(inclass, type)) {\r
            PyObject *args, *res;\r
\r
            if (value == Py_None)\r
                args = PyTuple_New(0);\r
            else if (PyTuple_Check(value)) {\r
                Py_INCREF(value);\r
                args = value;\r
            }\r
            else\r
                args = PyTuple_Pack(1, value);\r
\r
            if (args == NULL)\r
                goto finally;\r
            res = PyEval_CallObject(type, args);\r
            Py_DECREF(args);\r
            if (res == NULL)\r
                goto finally;\r
            Py_DECREF(value);\r
            value = res;\r
        }\r
        /* if the class of the instance doesn't exactly match the\r
           class of the type, believe the instance\r
        */\r
        else if (inclass != type) {\r
            Py_DECREF(type);\r
            type = inclass;\r
            Py_INCREF(type);\r
        }\r
    }\r
    *exc = type;\r
    *val = value;\r
    return;\r
finally:\r
    Py_DECREF(type);\r
    Py_DECREF(value);\r
    /* If the new exception doesn't set a traceback and the old\r
       exception had a traceback, use the old traceback for the\r
       new exception.  It's better than nothing.\r
    */\r
    initial_tb = *tb;\r
    PyErr_Fetch(exc, val, tb);\r
    if (initial_tb != NULL) {\r
        if (*tb == NULL)\r
            *tb = initial_tb;\r
        else\r
            Py_DECREF(initial_tb);\r
    }\r
    /* normalize recursively */\r
    tstate = PyThreadState_GET();\r
    if (++tstate->recursion_depth > Py_GetRecursionLimit()) {\r
        --tstate->recursion_depth;\r
        /* throw away the old exception... */\r
        Py_DECREF(*exc);\r
        Py_DECREF(*val);\r
        /* ... and use the recursion error instead */\r
        *exc = PyExc_RuntimeError;\r
        *val = PyExc_RecursionErrorInst;\r
        Py_INCREF(*exc);\r
        Py_INCREF(*val);\r
        /* just keeping the old traceback */\r
        return;\r
    }\r
    PyErr_NormalizeException(exc, val, tb);\r
    --tstate->recursion_depth;\r
}\r
\r
\r
void\r
PyErr_Fetch(PyObject **p_type, PyObject **p_value, PyObject **p_traceback)\r
{\r
    PyThreadState *tstate = PyThreadState_GET();\r
\r
    *p_type = tstate->curexc_type;\r
    *p_value = tstate->curexc_value;\r
    *p_traceback = tstate->curexc_traceback;\r
\r
    tstate->curexc_type = NULL;\r
    tstate->curexc_value = NULL;\r
    tstate->curexc_traceback = NULL;\r
}\r
\r
void\r
PyErr_Clear(void)\r
{\r
    PyErr_Restore(NULL, NULL, NULL);\r
}\r
\r
/* Convenience functions to set a type error exception and return 0 */\r
\r
int\r
PyErr_BadArgument(void)\r
{\r
    PyErr_SetString(PyExc_TypeError,\r
                    "bad argument type for built-in operation");\r
    return 0;\r
}\r
\r
PyObject *\r
PyErr_NoMemory(void)\r
{\r
    if (PyErr_ExceptionMatches(PyExc_MemoryError))\r
        /* already current */\r
        return NULL;\r
\r
    /* raise the pre-allocated instance if it still exists */\r
    if (PyExc_MemoryErrorInst)\r
        PyErr_SetObject(PyExc_MemoryError, PyExc_MemoryErrorInst);\r
    else\r
        /* this will probably fail since there's no memory and hee,\r
           hee, we have to instantiate this class\r
        */\r
        PyErr_SetNone(PyExc_MemoryError);\r
\r
    return NULL;\r
}\r
\r
PyObject *\r
PyErr_SetFromErrnoWithFilenameObject(PyObject *exc, PyObject *filenameObject)\r
{\r
    PyObject *v;\r
    char *s;\r
    int i = errno;\r
#ifdef PLAN9\r
    char errbuf[ERRMAX];\r
#endif\r
#ifdef MS_WINDOWS\r
    char *s_buf = NULL;\r
    char s_small_buf[28]; /* Room for "Windows Error 0xFFFFFFFF" */\r
#endif\r
#ifdef EINTR\r
    if (i == EINTR && PyErr_CheckSignals())\r
        return NULL;\r
#endif\r
#ifdef PLAN9\r
    rerrstr(errbuf, sizeof errbuf);\r
    s = errbuf;\r
#else\r
    if (i == 0)\r
        s = "Error"; /* Sometimes errno didn't get set */\r
    else\r
#ifndef MS_WINDOWS\r
        s = strerror(i);\r
#else\r
    {\r
        /* Note that the Win32 errors do not lineup with the\r
           errno error.  So if the error is in the MSVC error\r
           table, we use it, otherwise we assume it really _is_\r
           a Win32 error code\r
        */\r
        if (i > 0 && i < _sys_nerr) {\r
            s = _sys_errlist[i];\r
        }\r
        else {\r
            int len = FormatMessage(\r
                FORMAT_MESSAGE_ALLOCATE_BUFFER |\r
                FORMAT_MESSAGE_FROM_SYSTEM |\r
                FORMAT_MESSAGE_IGNORE_INSERTS,\r
                NULL,                   /* no message source */\r
                i,\r
                MAKELANGID(LANG_NEUTRAL,\r
                           SUBLANG_DEFAULT),\r
                           /* Default language */\r
                (LPTSTR) &s_buf,\r
                0,                      /* size not used */\r
                NULL);                  /* no args */\r
            if (len==0) {\r
                /* Only ever seen this in out-of-mem\r
                   situations */\r
                sprintf(s_small_buf, "Windows Error 0x%X", i);\r
                s = s_small_buf;\r
                s_buf = NULL;\r
            } else {\r
                s = s_buf;\r
                /* remove trailing cr/lf and dots */\r
                while (len > 0 && (s[len-1] <= ' ' || s[len-1] == '.'))\r
                    s[--len] = '\0';\r
            }\r
        }\r
    }\r
#endif /* Unix/Windows */\r
#endif /* PLAN 9*/\r
    if (filenameObject != NULL)\r
        v = Py_BuildValue("(isO)", i, s, filenameObject);\r
    else\r
        v = Py_BuildValue("(is)", i, s);\r
    if (v != NULL) {\r
        PyErr_SetObject(exc, v);\r
        Py_DECREF(v);\r
    }\r
#ifdef MS_WINDOWS\r
    LocalFree(s_buf);\r
#endif\r
    return NULL;\r
}\r
\r
\r
PyObject *\r
PyErr_SetFromErrnoWithFilename(PyObject *exc, const char *filename)\r
{\r
    PyObject *name = filename ? PyString_FromString(filename) : NULL;\r
    PyObject *result = PyErr_SetFromErrnoWithFilenameObject(exc, name);\r
    Py_XDECREF(name);\r
    return result;\r
}\r
\r
#ifdef MS_WINDOWS\r
PyObject *\r
PyErr_SetFromErrnoWithUnicodeFilename(PyObject *exc, const Py_UNICODE *filename)\r
{\r
    PyObject *name = filename ?\r
                     PyUnicode_FromUnicode(filename, wcslen(filename)) :\r
             NULL;\r
    PyObject *result = PyErr_SetFromErrnoWithFilenameObject(exc, name);\r
    Py_XDECREF(name);\r
    return result;\r
}\r
#endif /* MS_WINDOWS */\r
\r
PyObject *\r
PyErr_SetFromErrno(PyObject *exc)\r
{\r
    return PyErr_SetFromErrnoWithFilenameObject(exc, NULL);\r
}\r
\r
#ifdef MS_WINDOWS\r
/* Windows specific error code handling */\r
PyObject *PyErr_SetExcFromWindowsErrWithFilenameObject(\r
    PyObject *exc,\r
    int ierr,\r
    PyObject *filenameObject)\r
{\r
    int len;\r
    char *s;\r
    char *s_buf = NULL; /* Free via LocalFree */\r
    char s_small_buf[28]; /* Room for "Windows Error 0xFFFFFFFF" */\r
    PyObject *v;\r
    DWORD err = (DWORD)ierr;\r
    if (err==0) err = GetLastError();\r
    len = FormatMessage(\r
        /* Error API error */\r
        FORMAT_MESSAGE_ALLOCATE_BUFFER |\r
        FORMAT_MESSAGE_FROM_SYSTEM |\r
        FORMAT_MESSAGE_IGNORE_INSERTS,\r
        NULL,           /* no message source */\r
        err,\r
        MAKELANGID(LANG_NEUTRAL,\r
        SUBLANG_DEFAULT), /* Default language */\r
        (LPTSTR) &s_buf,\r
        0,              /* size not used */\r
        NULL);          /* no args */\r
    if (len==0) {\r
        /* Only seen this in out of mem situations */\r
        sprintf(s_small_buf, "Windows Error 0x%X", err);\r
        s = s_small_buf;\r
        s_buf = NULL;\r
    } else {\r
        s = s_buf;\r
        /* remove trailing cr/lf and dots */\r
        while (len > 0 && (s[len-1] <= ' ' || s[len-1] == '.'))\r
            s[--len] = '\0';\r
    }\r
    if (filenameObject != NULL)\r
        v = Py_BuildValue("(isO)", err, s, filenameObject);\r
    else\r
        v = Py_BuildValue("(is)", err, s);\r
    if (v != NULL) {\r
        PyErr_SetObject(exc, v);\r
        Py_DECREF(v);\r
    }\r
    LocalFree(s_buf);\r
    return NULL;\r
}\r
\r
PyObject *PyErr_SetExcFromWindowsErrWithFilename(\r
    PyObject *exc,\r
    int ierr,\r
    const char *filename)\r
{\r
    PyObject *name = filename ? PyString_FromString(filename) : NULL;\r
    PyObject *ret = PyErr_SetExcFromWindowsErrWithFilenameObject(exc,\r
                                                                 ierr,\r
                                                                 name);\r
    Py_XDECREF(name);\r
    return ret;\r
}\r
\r
PyObject *PyErr_SetExcFromWindowsErrWithUnicodeFilename(\r
    PyObject *exc,\r
    int ierr,\r
    const Py_UNICODE *filename)\r
{\r
    PyObject *name = filename ?\r
                     PyUnicode_FromUnicode(filename, wcslen(filename)) :\r
             NULL;\r
    PyObject *ret = PyErr_SetExcFromWindowsErrWithFilenameObject(exc,\r
                                                                 ierr,\r
                                                                 name);\r
    Py_XDECREF(name);\r
    return ret;\r
}\r
\r
PyObject *PyErr_SetExcFromWindowsErr(PyObject *exc, int ierr)\r
{\r
    return PyErr_SetExcFromWindowsErrWithFilename(exc, ierr, NULL);\r
}\r
\r
PyObject *PyErr_SetFromWindowsErr(int ierr)\r
{\r
    return PyErr_SetExcFromWindowsErrWithFilename(PyExc_WindowsError,\r
                                                  ierr, NULL);\r
}\r
PyObject *PyErr_SetFromWindowsErrWithFilename(\r
    int ierr,\r
    const char *filename)\r
{\r
    PyObject *name = filename ? PyString_FromString(filename) : NULL;\r
    PyObject *result = PyErr_SetExcFromWindowsErrWithFilenameObject(\r
                                                  PyExc_WindowsError,\r
                                                  ierr, name);\r
    Py_XDECREF(name);\r
    return result;\r
}\r
\r
PyObject *PyErr_SetFromWindowsErrWithUnicodeFilename(\r
    int ierr,\r
    const Py_UNICODE *filename)\r
{\r
    PyObject *name = filename ?\r
                     PyUnicode_FromUnicode(filename, wcslen(filename)) :\r
             NULL;\r
    PyObject *result = PyErr_SetExcFromWindowsErrWithFilenameObject(\r
                                                  PyExc_WindowsError,\r
                                                  ierr, name);\r
    Py_XDECREF(name);\r
    return result;\r
}\r
#endif /* MS_WINDOWS */\r
\r
void\r
_PyErr_BadInternalCall(char *filename, int lineno)\r
{\r
    PyErr_Format(PyExc_SystemError,\r
                 "%s:%d: bad argument to internal function",\r
                 filename, lineno);\r
}\r
\r
/* Remove the preprocessor macro for PyErr_BadInternalCall() so that we can\r
   export the entry point for existing object code: */\r
#undef PyErr_BadInternalCall\r
void\r
PyErr_BadInternalCall(void)\r
{\r
    PyErr_Format(PyExc_SystemError,\r
                 "bad argument to internal function");\r
}\r
#define PyErr_BadInternalCall() _PyErr_BadInternalCall(__FILE__, __LINE__)\r
\r
\r
\r
PyObject *\r
PyErr_Format(PyObject *exception, const char *format, ...)\r
{\r
    va_list vargs;\r
    PyObject* string;\r
\r
#ifdef HAVE_STDARG_PROTOTYPES\r
    va_start(vargs, format);\r
#else\r
    va_start(vargs);\r
#endif\r
\r
    string = PyString_FromFormatV(format, vargs);\r
    PyErr_SetObject(exception, string);\r
    Py_XDECREF(string);\r
    va_end(vargs);\r
    return NULL;\r
}\r
\r
\r
\r
PyObject *\r
PyErr_NewException(char *name, PyObject *base, PyObject *dict)\r
{\r
    char *dot;\r
    PyObject *modulename = NULL;\r
    PyObject *classname = NULL;\r
    PyObject *mydict = NULL;\r
    PyObject *bases = NULL;\r
    PyObject *result = NULL;\r
    dot = strrchr(name, '.');\r
    if (dot == NULL) {\r
        PyErr_SetString(PyExc_SystemError,\r
            "PyErr_NewException: name must be module.class");\r
        return NULL;\r
    }\r
    if (base == NULL)\r
        base = PyExc_Exception;\r
    if (dict == NULL) {\r
        dict = mydict = PyDict_New();\r
        if (dict == NULL)\r
            goto failure;\r
    }\r
    if (PyDict_GetItemString(dict, "__module__") == NULL) {\r
        modulename = PyString_FromStringAndSize(name,\r
                                             (Py_ssize_t)(dot-name));\r
        if (modulename == NULL)\r
            goto failure;\r
        if (PyDict_SetItemString(dict, "__module__", modulename) != 0)\r
            goto failure;\r
    }\r
    if (PyTuple_Check(base)) {\r
        bases = base;\r
        /* INCREF as we create a new ref in the else branch */\r
        Py_INCREF(bases);\r
    } else {\r
        bases = PyTuple_Pack(1, base);\r
        if (bases == NULL)\r
            goto failure;\r
    }\r
    /* Create a real new-style class. */\r
    result = PyObject_CallFunction((PyObject *)&PyType_Type, "sOO",\r
                                   dot+1, bases, dict);\r
  failure:\r
    Py_XDECREF(bases);\r
    Py_XDECREF(mydict);\r
    Py_XDECREF(classname);\r
    Py_XDECREF(modulename);\r
    return result;\r
}\r
\r
\r
/* Create an exception with docstring */\r
PyObject *\r
PyErr_NewExceptionWithDoc(char *name, char *doc, PyObject *base, PyObject *dict)\r
{\r
    int result;\r
    PyObject *ret = NULL;\r
    PyObject *mydict = NULL; /* points to the dict only if we create it */\r
    PyObject *docobj;\r
\r
    if (dict == NULL) {\r
        dict = mydict = PyDict_New();\r
        if (dict == NULL) {\r
            return NULL;\r
        }\r
    }\r
\r
    if (doc != NULL) {\r
        docobj = PyString_FromString(doc);\r
        if (docobj == NULL)\r
            goto failure;\r
        result = PyDict_SetItemString(dict, "__doc__", docobj);\r
        Py_DECREF(docobj);\r
        if (result < 0)\r
            goto failure;\r
    }\r
\r
    ret = PyErr_NewException(name, base, dict);\r
  failure:\r
    Py_XDECREF(mydict);\r
    return ret;\r
}\r
\r
\r
/* Call when an exception has occurred but there is no way for Python\r
   to handle it.  Examples: exception in __del__ or during GC. */\r
void\r
PyErr_WriteUnraisable(PyObject *obj)\r
{\r
    PyObject *f, *t, *v, *tb;\r
    PyErr_Fetch(&t, &v, &tb);\r
    f = PySys_GetObject("stderr");\r
    if (f != NULL) {\r
        PyFile_WriteString("Exception ", f);\r
        if (t) {\r
            PyObject* moduleName;\r
            char* className;\r
            assert(PyExceptionClass_Check(t));\r
            className = PyExceptionClass_Name(t);\r
            if (className != NULL) {\r
                char *dot = strrchr(className, '.');\r
                if (dot != NULL)\r
                    className = dot+1;\r
            }\r
\r
            moduleName = PyObject_GetAttrString(t, "__module__");\r
            if (moduleName == NULL)\r
                PyFile_WriteString("<unknown>", f);\r
            else {\r
                char* modstr = PyString_AsString(moduleName);\r
                if (modstr &&\r
                    strcmp(modstr, "exceptions") != 0)\r
                {\r
                    PyFile_WriteString(modstr, f);\r
                    PyFile_WriteString(".", f);\r
                }\r
            }\r
            if (className == NULL)\r
                PyFile_WriteString("<unknown>", f);\r
            else\r
                PyFile_WriteString(className, f);\r
            if (v && v != Py_None) {\r
                PyFile_WriteString(": ", f);\r
                PyFile_WriteObject(v, f, 0);\r
            }\r
            Py_XDECREF(moduleName);\r
        }\r
        PyFile_WriteString(" in ", f);\r
        PyFile_WriteObject(obj, f, 0);\r
        PyFile_WriteString(" ignored\n", f);\r
        PyErr_Clear(); /* Just in case */\r
    }\r
    Py_XDECREF(t);\r
    Py_XDECREF(v);\r
    Py_XDECREF(tb);\r
}\r
\r
extern PyObject *PyModule_GetWarningsModule(void);\r
\r
\r
/* Set file and line information for the current exception.\r
   If the exception is not a SyntaxError, also sets additional attributes\r
   to make printing of exceptions believe it is a syntax error. */\r
\r
void\r
PyErr_SyntaxLocation(const char *filename, int lineno)\r
{\r
    PyObject *exc, *v, *tb, *tmp;\r
\r
    /* add attributes for the line number and filename for the error */\r
    PyErr_Fetch(&exc, &v, &tb);\r
    PyErr_NormalizeException(&exc, &v, &tb);\r
    /* XXX check that it is, indeed, a syntax error. It might not\r
     * be, though. */\r
    tmp = PyInt_FromLong(lineno);\r
    if (tmp == NULL)\r
        PyErr_Clear();\r
    else {\r
        if (PyObject_SetAttrString(v, "lineno", tmp))\r
            PyErr_Clear();\r
        Py_DECREF(tmp);\r
    }\r
    if (filename != NULL) {\r
        tmp = PyString_FromString(filename);\r
        if (tmp == NULL)\r
            PyErr_Clear();\r
        else {\r
            if (PyObject_SetAttrString(v, "filename", tmp))\r
                PyErr_Clear();\r
            Py_DECREF(tmp);\r
        }\r
\r
        tmp = PyErr_ProgramText(filename, lineno);\r
        if (tmp) {\r
            if (PyObject_SetAttrString(v, "text", tmp))\r
                PyErr_Clear();\r
            Py_DECREF(tmp);\r
        }\r
    }\r
    if (PyObject_SetAttrString(v, "offset", Py_None)) {\r
        PyErr_Clear();\r
    }\r
    if (exc != PyExc_SyntaxError) {\r
        if (!PyObject_HasAttrString(v, "msg")) {\r
            tmp = PyObject_Str(v);\r
            if (tmp) {\r
                if (PyObject_SetAttrString(v, "msg", tmp))\r
                    PyErr_Clear();\r
                Py_DECREF(tmp);\r
            } else {\r
                PyErr_Clear();\r
            }\r
        }\r
        if (!PyObject_HasAttrString(v, "print_file_and_line")) {\r
            if (PyObject_SetAttrString(v, "print_file_and_line",\r
                                       Py_None))\r
                PyErr_Clear();\r
        }\r
    }\r
    PyErr_Restore(exc, v, tb);\r
}\r
\r
/* com_fetch_program_text will attempt to load the line of text that\r
   the exception refers to.  If it fails, it will return NULL but will\r
   not set an exception.\r
\r
   XXX The functionality of this function is quite similar to the\r
   functionality in tb_displayline() in traceback.c.\r
*/\r
\r
PyObject *\r
PyErr_ProgramText(const char *filename, int lineno)\r
{\r
    FILE *fp;\r
    int i;\r
    char linebuf[1000];\r
\r
    if (filename == NULL || *filename == '\0' || lineno <= 0)\r
        return NULL;\r
    fp = fopen(filename, "r" PY_STDIOTEXTMODE);\r
    if (fp == NULL)\r
        return NULL;\r
    for (i = 0; i < lineno; i++) {\r
        char *pLastChar = &linebuf[sizeof(linebuf) - 2];\r
        do {\r
            *pLastChar = '\0';\r
            if (Py_UniversalNewlineFgets(linebuf, sizeof linebuf, fp, NULL) == NULL)\r
                break;\r
            /* fgets read *something*; if it didn't get as\r
               far as pLastChar, it must have found a newline\r
               or hit the end of the file; if pLastChar is \n,\r
               it obviously found a newline; else we haven't\r
               yet seen a newline, so must continue */\r
        } while (*pLastChar != '\0' && *pLastChar != '\n');\r
    }\r
    fclose(fp);\r
    if (i == lineno) {\r
        char *p = linebuf;\r
        while (*p == ' ' || *p == '\t' || *p == '\014')\r
            p++;\r
        return PyString_FromString(p);\r
    }\r
    return NULL;\r
}\r
\r
#ifdef __cplusplus\r
}\r
#endif\r
\r