Content-Security-Policy: default-src 'none' Content-Type: text/plain; charset=UTF-8 Content-Length: 26795 Content-Disposition: inline; filename="pythonrun.c" Last-Modified: Sat, 24 Jan 2026 16:37:10 GMT Expires: Tue, 22 Jan 2036 16:37:10 GMT ETag: "2d065cf22dcfd4899cb997aa4e17792af47ec186" /*********************************************************** Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, The Netherlands. All Rights Reserved Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation, and that the names of Stichting Mathematisch Centrum or CWI or Corporation for National Research Initiatives or CNRI not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. While CWI is the initial source for this software, a modified version is made available by the Corporation for National Research Initiatives (CNRI) at the Internet address ftp://ftp.python.org. STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. ******************************************************************/ /* Python interpreter top-level routines, including init/exit */ #include "Python.h" #include "grammar.h" #include "node.h" #include "parsetok.h" #include "errcode.h" #include "compile.h" #include "eval.h" #include "marshal.h" #ifdef HAVE_UNISTD_H #include #endif #ifdef HAVE_SIGNAL_H #include #endif #ifdef MS_WIN32 #undef BYTE #include "windows.h" #endif extern char *Py_GetPath(); extern grammar _PyParser_Grammar; /* From graminit.c */ /* Forward */ static void initmain Py_PROTO((void)); static void initsite Py_PROTO((void)); static PyObject *run_err_node Py_PROTO((node *n, char *filename, PyObject *globals, PyObject *locals)); static PyObject *run_node Py_PROTO((node *n, char *filename, PyObject *globals, PyObject *locals)); static PyObject *run_pyc_file Py_PROTO((FILE *fp, char *filename, PyObject *globals, PyObject *locals)); static void err_input Py_PROTO((perrdetail *)); static void initsigs Py_PROTO((void)); static void call_sys_exitfunc Py_PROTO((void)); static void call_ll_exitfuncs Py_PROTO((void)); int Py_DebugFlag; /* Needed by parser.c */ int Py_VerboseFlag; /* Needed by import.c */ int Py_InteractiveFlag; /* Needed by Py_FdIsInteractive() below */ int Py_NoSiteFlag; /* Suppress 'import site' */ int Py_UseClassExceptionsFlag = 1; /* Needed by bltinmodule.c */ int Py_FrozenFlag; /* Needed by getpath.c */ static int initialized = 0; /* API to access the initialized flag -- useful for eroteric use */ int Py_IsInitialized() { return initialized; } /* Global initializations. Can be undone by Py_Finalize(). Don't call this twice without an intervening Py_Finalize() call. When initializations fail, a fatal error is issued and the function does not return. On return, the first thread and interpreter state have been created. Locking: you must hold the interpreter lock while calling this. (If the lock has not yet been initialized, that's equivalent to having the lock, but you cannot use multiple threads.) */ extern void win_pre_init(), win_pre_exit(); void Py_Initialize() { PyInterpreterState *interp; PyThreadState *tstate; PyObject *bimod, *sysmod; char *p; if (initialized) return; initialized = 1; #ifdef MS_WINDOWS win_pre_init(); #endif if ((p = getenv("PYTHONDEBUG")) && *p != '\0') Py_DebugFlag = 1; if ((p = getenv("PYTHONVERBOSE")) && *p != '\0') Py_VerboseFlag = 1; if ((p = getenv("PYTHONOPTIMIZE")) && *p != '\0') Py_OptimizeFlag = 1; interp = PyInterpreterState_New(); if (interp == NULL) Py_FatalError("Py_Initialize: can't make first interpreter"); tstate = PyThreadState_New(interp); if (tstate == NULL) Py_FatalError("Py_Initialize: can't make first thread"); (void) PyThreadState_Swap(tstate); interp->modules = PyDict_New(); if (interp->modules == NULL) Py_FatalError("Py_Initialize: can't make modules dictionary"); bimod = _PyBuiltin_Init_1(); if (bimod == NULL) Py_FatalError("Py_Initialize: can't initialize __builtin__"); interp->builtins = PyModule_GetDict(bimod); Py_INCREF(interp->builtins); sysmod = _PySys_Init(); if (sysmod == NULL) Py_FatalError("Py_Initialize: can't initialize sys"); interp->sysdict = PyModule_GetDict(sysmod); Py_INCREF(interp->sysdict); _PyImport_FixupExtension("sys", "sys"); PySys_SetPath(Py_GetPath()); PyDict_SetItemString(interp->sysdict, "modules", interp->modules); /* phase 2 of builtins */ _PyBuiltin_Init_2(interp->builtins); _PyImport_FixupExtension("__builtin__", "__builtin__"); _PyImport_Init(); initsigs(); /* Signal handling stuff, including initintr() */ initmain(); /* Module __main__ */ if (!Py_NoSiteFlag) initsite(); /* Module site */ } #ifdef COUNT_ALLOCS extern void dump_counts Py_PROTO((void)); #endif /* Undo the effect of Py_Initialize(). Beware: if multiple interpreter and/or thread states exist, these are not wiped out; only the current thread and interpreter state are deleted. But since everything else is deleted, those other interpreter and thread states should no longer be used. (XXX We should do better, e.g. wipe out all interpreters and threads.) Locking: as above. */ void Py_Finalize() { PyInterpreterState *interp; PyThreadState *tstate; if (!initialized) return; initialized = 0; call_sys_exitfunc(); /* Get current thread state and interpreter pointer */ tstate = PyThreadState_Get(); interp = tstate->interp; /* Disable signal handling */ PyOS_FiniInterrupts(); /* Destroy PyExc_MemoryErrorInst */ _PyBuiltin_Fini_1(); /* Destroy all modules */ PyImport_Cleanup(); /* Destroy the database used by _PyImport_{Fixup,Find}Extension */ _PyImport_Fini(); /* Debugging stuff */ #ifdef COUNT_ALLOCS dump_counts(); #endif #ifdef Py_REF_DEBUG fprintf(stderr, "[%ld refs]\n", _Py_RefTotal); #endif #ifdef Py_TRACE_REFS if (_Py_AskYesNo("Print left references?")) { _Py_PrintReferences(stderr); } #endif /* Py_TRACE_REFS */ /* Delete current thread */ PyInterpreterState_Clear(interp); PyThreadState_Swap(NULL); PyInterpreterState_Delete(interp); /* Now we decref the exception classes. After this point nothing can raise an exception. That's okay, because each Fini() method below has been checked to make sure no exceptions are ever raised. */ _PyBuiltin_Fini_2(); PyMethod_Fini(); PyFrame_Fini(); PyCFunction_Fini(); PyTuple_Fini(); PyString_Fini(); PyInt_Fini(); PyFloat_Fini(); /* XXX Still allocated: - various static ad-hoc pointers to interned strings - int and float free list blocks - whatever various modules and libraries allocate */ PyGrammar_RemoveAccelerators(&_PyParser_Grammar); call_ll_exitfuncs(); #ifdef Py_TRACE_REFS _Py_ResetReferences(); #endif /* Py_TRACE_REFS */ } /* Create and initialize a new interpreter and thread, and return the new thread. This requires that Py_Initialize() has been called first. Unsuccessful initialization yields a NULL pointer. Note that *no* exception information is available even in this case -- the exception information is held in the thread, and there is no thread. Locking: as above. */ PyThreadState * Py_NewInterpreter() { PyInterpreterState *interp; PyThreadState *tstate, *save_tstate; PyObject *bimod, *sysmod; if (!initialized) Py_FatalError("Py_NewInterpreter: call Py_Initialize first"); interp = PyInterpreterState_New(); if (interp == NULL) return NULL; tstate = PyThreadState_New(interp); if (tstate == NULL) { PyInterpreterState_Delete(interp); return NULL; } save_tstate = PyThreadState_Swap(tstate); /* XXX The following is lax in error checking */ interp->modules = PyDict_New(); bimod = _PyImport_FindExtension("__builtin__", "__builtin__"); if (bimod != NULL) { interp->builtins = PyModule_GetDict(bimod); Py_INCREF(interp->builtins); } sysmod = _PyImport_FindExtension("sys", "sys"); if (bimod != NULL && sysmod != NULL) { interp->sysdict = PyModule_GetDict(sysmod); Py_INCREF(interp->sysdict); PySys_SetPath(Py_GetPath()); PyDict_SetItemString(interp->sysdict, "modules", interp->modules); initmain(); if (!Py_NoSiteFlag) initsite(); } if (!PyErr_Occurred()) return tstate; /* Oops, it didn't work. Undo it all. */ PyErr_Print(); PyThreadState_Clear(tstate); PyThreadState_Swap(save_tstate); PyThreadState_Delete(tstate); PyInterpreterState_Delete(interp); return NULL; } /* Delete an interpreter and its last thread. This requires that the given thread state is current, that the thread has no remaining frames, and that it is its interpreter's only remaining thread. It is a fatal error to violate these constraints. (Py_Finalize() doesn't have these constraints -- it zaps everything, regardless.) Locking: as above. */ void Py_EndInterpreter(tstate) PyThreadState *tstate; { PyInterpreterState *interp = tstate->interp; if (tstate != PyThreadState_Get()) Py_FatalError("Py_EndInterpreter: thread is not current"); if (tstate->frame != NULL) Py_FatalError("Py_EndInterpreter: thread still has a frame"); if (tstate != interp->tstate_head || tstate->next != NULL) Py_FatalError("Py_EndInterpreter: not the last thread"); PyImport_Cleanup(); PyInterpreterState_Clear(interp); PyThreadState_Swap(NULL); PyInterpreterState_Delete(interp); } static char *progname = "python"; void Py_SetProgramName(pn) char *pn; { if (pn && *pn) progname = pn; } char * Py_GetProgramName() { return progname; } static char *default_home = NULL; void Py_SetPythonHome(home) char *home; { default_home = home; } char * Py_GetPythonHome() { char *home = default_home; if (home == NULL) home = getenv("PYTHONHOME"); return home; } /* Create __main__ module */ static void initmain() { PyObject *m, *d; m = PyImport_AddModule("__main__"); if (m == NULL) Py_FatalError("can't create __main__ module"); d = PyModule_GetDict(m); if (PyDict_GetItemString(d, "__builtins__") == NULL) { PyObject *bimod = PyImport_ImportModule("__builtin__"); if (bimod == NULL || PyDict_SetItemString(d, "__builtins__", bimod) != 0) Py_FatalError("can't add __builtins__ to __main__"); Py_DECREF(bimod); } } /* Import the site module (not into __main__ though) */ static void initsite() { PyObject *m, *f; m = PyImport_ImportModule("site"); if (m == NULL) { f = PySys_GetObject("stderr"); if (Py_VerboseFlag) { PyFile_WriteString( "'import site' failed; traceback:\n", f); PyErr_Print(); } else { PyFile_WriteString( "'import site' failed; use -v for traceback\n", f); PyErr_Clear(); } } else { Py_DECREF(m); } } /* Parse input from a file and execute it */ int PyRun_AnyFile(fp, filename) FILE *fp; char *filename; { if (filename == NULL) filename = "???"; if (Py_FdIsInteractive(fp, filename)) return PyRun_InteractiveLoop(fp, filename); else return PyRun_SimpleFile(fp, filename); } int PyRun_InteractiveLoop(fp, filename) FILE *fp; char *filename; { PyObject *v; int ret; v = PySys_GetObject("ps1"); if (v == NULL) { PySys_SetObject("ps1", v = PyString_FromString(">>> ")); Py_XDECREF(v); } v = PySys_GetObject("ps2"); if (v == NULL) { PySys_SetObject("ps2", v = PyString_FromString("... ")); Py_XDECREF(v); } for (;;) { ret = PyRun_InteractiveOne(fp, filename); #ifdef Py_REF_DEBUG fprintf(stderr, "[%ld refs]\n", _Py_RefTotal); #endif if (ret == E_EOF) return 0; /* if (ret == E_NOMEM) return -1; */ } } int PyRun_InteractiveOne(fp, filename) FILE *fp; char *filename; { PyObject *m, *d, *v, *w; node *n; perrdetail err; char *ps1 = "", *ps2 = ""; v = PySys_GetObject("ps1"); if (v != NULL) { v = PyObject_Str(v); if (v == NULL) PyErr_Clear(); else if (PyString_Check(v)) ps1 = PyString_AsString(v); } w = PySys_GetObject("ps2"); if (w != NULL) { w = PyObject_Str(w); if (w == NULL) PyErr_Clear(); else if (PyString_Check(w)) ps2 = PyString_AsString(w); } n = PyParser_ParseFile(fp, filename, &_PyParser_Grammar, Py_single_input, ps1, ps2, &err); Py_XDECREF(v); Py_XDECREF(w); if (n == NULL) { if (err.error == E_EOF) { if (err.text) free(err.text); return E_EOF; } err_input(&err); PyErr_Print(); return err.error; } m = PyImport_AddModule("__main__"); if (m == NULL) return -1; d = PyModule_GetDict(m); v = run_node(n, filename, d, d); if (v == NULL) { PyErr_Print(); return -1; } Py_DECREF(v); if (Py_FlushLine()) PyErr_Clear(); return 0; } int PyRun_SimpleFile(fp, filename) FILE *fp; char *filename; { PyObject *m, *d, *v; char *ext; m = PyImport_AddModule("__main__"); if (m == NULL) return -1; d = PyModule_GetDict(m); ext = filename + strlen(filename) - 4; if (strcmp(ext, ".pyc") == 0 || strcmp(ext, ".pyo") == 0 #ifdef macintosh /* On a mac, we also assume a pyc file for types 'PYC ' and 'APPL' */ || getfiletype(filename) == 'PYC ' || getfiletype(filename) == 'APPL' #endif /* macintosh */ ) { /* Try to run a pyc file. First, re-open in binary */ /* Don't close, done in main: fclose(fp); */ if( (fp = fopen(filename, "rb")) == NULL ) { fprintf(stderr, "python: Can't reopen .pyc file\n"); return -1; } /* Turn on optimization if a .pyo file is given */ if (strcmp(ext, ".pyo") == 0) Py_OptimizeFlag = 1; v = run_pyc_file(fp, filename, d, d); } else { v = PyRun_File(fp, filename, Py_file_input, d, d); } if (v == NULL) { PyErr_Print(); return -1; } Py_DECREF(v); if (Py_FlushLine()) PyErr_Clear(); return 0; } int PyRun_SimpleString(command) char *command; { PyObject *m, *d, *v; m = PyImport_AddModule("__main__"); if (m == NULL) return -1; d = PyModule_GetDict(m); v = PyRun_String(command, Py_file_input, d, d); if (v == NULL) { PyErr_Print(); return -1; } Py_DECREF(v); if (Py_FlushLine()) PyErr_Clear(); return 0; } static int parse_syntax_error(err, message, filename, lineno, offset, text) PyObject* err; PyObject** message; char** filename; int* lineno; int* offset; char** text; { long hold; PyObject *v; /* old style errors */ if (PyTuple_Check(err)) return PyArg_Parse(err, "(O(ziiz))", message, filename, lineno, offset, text); /* new style errors. `err' is an instance */ if (! (v = PyObject_GetAttrString(err, "msg"))) goto finally; *message = v; if (!(v = PyObject_GetAttrString(err, "filename"))) goto finally; if (v == Py_None) *filename = NULL; else if (! (*filename = PyString_AsString(v))) goto finally; Py_DECREF(v); if (!(v = PyObject_GetAttrString(err, "lineno"))) goto finally; hold = PyInt_AsLong(v); Py_DECREF(v); v = NULL; if (hold < 0 && PyErr_Occurred()) goto finally; *lineno = (int)hold; if (!(v = PyObject_GetAttrString(err, "offset"))) goto finally; hold = PyInt_AsLong(v); Py_DECREF(v); v = NULL; if (hold < 0 && PyErr_Occurred()) goto finally; *offset = (int)hold; if (!(v = PyObject_GetAttrString(err, "text"))) goto finally; if (v == Py_None) *text = NULL; else if (! (*text = PyString_AsString(v))) goto finally; Py_DECREF(v); return 1; finally: Py_XDECREF(v); return 0; } void PyErr_Print() { PyErr_PrintEx(1); } void PyErr_PrintEx(set_sys_last_vars) int set_sys_last_vars; { int err = 0; PyObject *exception, *v, *tb, *f; PyErr_Fetch(&exception, &v, &tb); PyErr_NormalizeException(&exception, &v, &tb); if (exception == NULL) return; if (PyErr_GivenExceptionMatches(exception, PyExc_SystemExit)) { if (Py_FlushLine()) PyErr_Clear(); fflush(stdout); if (v == NULL || v == Py_None) Py_Exit(0); if (PyInstance_Check(v)) { /* we expect the error code to be store in the `code' attribute */ PyObject *code = PyObject_GetAttrString(v, "code"); if (code) { Py_DECREF(v); v = code; if (v == Py_None) Py_Exit(0); } /* if we failed to dig out the "code" attribute, then just let the else clause below print the error */ } if (PyInt_Check(v)) Py_Exit((int)PyInt_AsLong(v)); else { /* OK to use real stderr here */ PyObject_Print(v, stderr, Py_PRINT_RAW); fprintf(stderr, "\n"); Py_Exit(1); } } if (set_sys_last_vars) { PySys_SetObject("last_type", exception); PySys_SetObject("last_value", v); PySys_SetObject("last_traceback", tb); } f = PySys_GetObject("stderr"); if (f == NULL) fprintf(stderr, "lost sys.stderr\n"); else { if (Py_FlushLine()) PyErr_Clear(); fflush(stdout); err = PyTraceBack_Print(tb, f); if (err == 0 && PyErr_GivenExceptionMatches(exception, PyExc_SyntaxError)) { PyObject *message; char *filename, *text; int lineno, offset; if (!parse_syntax_error(v, &message, &filename, &lineno, &offset, &text)) PyErr_Clear(); else { char buf[10]; PyFile_WriteString(" File \"", f); if (filename == NULL) PyFile_WriteString("", f); else PyFile_WriteString(filename, f); PyFile_WriteString("\", line ", f); sprintf(buf, "%d", lineno); PyFile_WriteString(buf, f); PyFile_WriteString("\n", f); if (text != NULL) { char *nl; if (offset > 0 && offset == (int)strlen(text)) offset--; for (;;) { nl = strchr(text, '\n'); if (nl == NULL || nl-text >= offset) break; offset -= (nl+1-text); text = nl+1; } while (*text == ' ' || *text == '\t') { text++; offset--; } PyFile_WriteString(" ", f); PyFile_WriteString(text, f); if (*text == '\0' || text[strlen(text)-1] != '\n') PyFile_WriteString("\n", f); PyFile_WriteString(" ", f); offset--; while (offset > 0) { PyFile_WriteString(" ", f); offset--; } PyFile_WriteString("^\n", f); } Py_INCREF(message); Py_DECREF(v); v = message; /* Can't be bothered to check all those PyFile_WriteString() calls */ if (PyErr_Occurred()) err = -1; } } if (err) { /* Don't do anything else */ } else if (PyClass_Check(exception)) { PyClassObject* exc = (PyClassObject*)exception; PyObject* className = exc->cl_name; PyObject* moduleName = PyDict_GetItemString(exc->cl_dict, "__module__"); if (moduleName == NULL) err = PyFile_WriteString("", f); else { char* modstr = PyString_AsString(moduleName); if (modstr && strcmp(modstr, "exceptions")) { err = PyFile_WriteString(modstr, f); err += PyFile_WriteString(".", f); } } if (err == 0) { if (className == NULL) err = PyFile_WriteString("", f); else err = PyFile_WriteObject(className, f, Py_PRINT_RAW); } } else err = PyFile_WriteObject(exception, f, Py_PRINT_RAW); if (err == 0) { if (v != NULL && v != Py_None) { PyObject *s = PyObject_Str(v); /* only print colon if the str() of the object is not the empty string */ if (s == NULL) err = -1; else if (!PyString_Check(s) || PyString_GET_SIZE(s) != 0) err = PyFile_WriteString(": ", f); if (err == 0) err = PyFile_WriteObject(s, f, Py_PRINT_RAW); Py_XDECREF(s); } } if (err == 0) err = PyFile_WriteString("\n", f); } Py_XDECREF(exception); Py_XDECREF(v); Py_XDECREF(tb); /* If an error happened here, don't show it. XXX This is wrong, but too many callers rely on this behavior. */ if (err != 0) PyErr_Clear(); } PyObject * PyRun_String(str, start, globals, locals) char *str; int start; PyObject *globals, *locals; { return run_err_node(PyParser_SimpleParseString(str, start), "", globals, locals); } PyObject * PyRun_File(fp, filename, start, globals, locals) FILE *fp; char *filename; int start; PyObject *globals, *locals; { return run_err_node(PyParser_SimpleParseFile(fp, filename, start), filename, globals, locals); } static PyObject * run_err_node(n, filename, globals, locals) node *n; char *filename; PyObject *globals, *locals; { if (n == NULL) return NULL; return run_node(n, filename, globals, locals); } static PyObject * run_node(n, filename, globals, locals) node *n; char *filename; PyObject *globals, *locals; { PyCodeObject *co; PyObject *v; co = PyNode_Compile(n, filename); PyNode_Free(n); if (co == NULL) return NULL; v = PyEval_EvalCode(co, globals, locals); Py_DECREF(co); return v; } static PyObject * run_pyc_file(fp, filename, globals, locals) FILE *fp; char *filename; PyObject *globals, *locals; { PyCodeObject *co; PyObject *v; long magic; long PyImport_GetMagicNumber(); magic = PyMarshal_ReadLongFromFile(fp); if (magic != PyImport_GetMagicNumber()) { PyErr_SetString(PyExc_RuntimeError, "Bad magic number in .pyc file"); return NULL; } (void) PyMarshal_ReadLongFromFile(fp); v = PyMarshal_ReadObjectFromFile(fp); fclose(fp); if (v == NULL || !PyCode_Check(v)) { Py_XDECREF(v); PyErr_SetString(PyExc_RuntimeError, "Bad code object in .pyc file"); return NULL; } co = (PyCodeObject *)v; v = PyEval_EvalCode(co, globals, locals); Py_DECREF(co); return v; } PyObject * Py_CompileString(str, filename, start) char *str; char *filename; int start; { node *n; PyCodeObject *co; n = PyParser_SimpleParseString(str, start); if (n == NULL) return NULL; co = PyNode_Compile(n, filename); PyNode_Free(n); return (PyObject *)co; } /* Simplified interface to parsefile -- return node or set exception */ node * PyParser_SimpleParseFile(fp, filename, start) FILE *fp; char *filename; int start; { node *n; perrdetail err; n = PyParser_ParseFile(fp, filename, &_PyParser_Grammar, start, (char *)0, (char *)0, &err); if (n == NULL) err_input(&err); return n; } /* Simplified interface to parsestring -- return node or set exception */ node * PyParser_SimpleParseString(str, start) char *str; int start; { node *n; perrdetail err; n = PyParser_ParseString(str, &_PyParser_Grammar, start, &err); if (n == NULL) err_input(&err); return n; } /* Set the error appropriate to the given input error code (see errcode.h) */ static void err_input(err) perrdetail *err; { PyObject *v, *w; char *msg = NULL; v = Py_BuildValue("(ziiz)", err->filename, err->lineno, err->offset, err->text); if (err->text != NULL) { free(err->text); err->text = NULL; } switch (err->error) { case E_SYNTAX: msg = "invalid syntax"; break; case E_TOKEN: msg = "invalid token"; break; case E_INTR: PyErr_SetNone(PyExc_KeyboardInterrupt); Py_XDECREF(v); return; case E_NOMEM: PyErr_NoMemory(); Py_XDECREF(v); return; case E_EOF: msg = "unexpected EOF while parsing"; break; case E_INDENT: msg = "inconsistent use of tabs and spaces in indentation"; break; default: fprintf(stderr, "error=%d\n", err->error); msg = "unknown parsing error"; break; } w = Py_BuildValue("(sO)", msg, v); Py_XDECREF(v); PyErr_SetObject(PyExc_SyntaxError, w); Py_XDECREF(w); } /* Print fatal error message and abort */ void Py_FatalError(msg) char *msg; { fprintf(stderr, "Fatal Python error: %s\n", msg); #ifdef macintosh for (;;); #endif #ifdef MS_WIN32 OutputDebugString("Fatal Python error: "); OutputDebugString(msg); OutputDebugString("\n"); #ifdef _DEBUG DebugBreak(); #endif #endif /* MS_WIN32 */ abort(); } /* Clean up and exit */ #ifdef WITH_THREAD #include "pythread.h" int _PyThread_Started = 0; /* Set by threadmodule.c and maybe others */ #endif #define NEXITFUNCS 32 static void (*exitfuncs[NEXITFUNCS])(); static int nexitfuncs = 0; int Py_AtExit(func) void (*func) Py_PROTO((void)); { if (nexitfuncs >= NEXITFUNCS) return -1; exitfuncs[nexitfuncs++] = func; return 0; } static void call_sys_exitfunc() { PyObject *exitfunc = PySys_GetObject("exitfunc"); if (exitfunc) { PyObject *res, *f; Py_INCREF(exitfunc); PySys_SetObject("exitfunc", (PyObject *)NULL); f = PySys_GetObject("stderr"); res = PyEval_CallObject(exitfunc, (PyObject *)NULL); if (res == NULL) { if (f) PyFile_WriteString("Error in sys.exitfunc:\n", f); PyErr_Print(); } Py_DECREF(exitfunc); } if (Py_FlushLine()) PyErr_Clear(); } static void call_ll_exitfuncs() { while (nexitfuncs > 0) (*exitfuncs[--nexitfuncs])(); fflush(stdout); fflush(stderr); } void Py_Exit(sts) int sts; { Py_Finalize(); #ifdef macintosh PyMac_Exit(sts); #else #ifdef MS_WINDOWS win_pre_exit(sts); #endif exit(sts); #endif } static void initsigs() { #ifdef HAVE_SIGNAL_H #ifdef SIGPIPE signal(SIGPIPE, SIG_IGN); #endif #endif /* HAVE_SIGNAL_H */ PyOS_InitInterrupts(); /* May imply initsignal() */ } #ifdef Py_TRACE_REFS /* Ask a yes/no question */ int _Py_AskYesNo(prompt) char *prompt; { char buf[256]; printf("%s [ny] ", prompt); if (fgets(buf, sizeof buf, stdin) == NULL) return 0; return buf[0] == 'y' || buf[0] == 'Y'; } #endif #ifdef MPW /* Check for file descriptor connected to interactive device. Pretend that stdin is always interactive, other files never. */ int isatty(fd) int fd; { return fd == fileno(stdin); } #endif /* * The file descriptor fd is considered ``interactive'' if either * a) isatty(fd) is TRUE, or * b) the -i flag was given, and the filename associated with * the descriptor is NULL or "" or "???". */ int Py_FdIsInteractive(fp, filename) FILE *fp; char *filename; { if (isatty((int)fileno(fp))) return 1; if (!Py_InteractiveFlag) return 0; return (filename == NULL) || (strcmp(filename, "") == 0) || (strcmp(filename, "???") == 0); } #ifdef MS_WINDOWS #include #include static int its_my_console = -1; static void win_pre_init() { HANDLE console; CONSOLE_SCREEN_BUFFER_INFO info; if (its_my_console >= 0) return; its_my_console = 0; console = GetStdHandle(STD_OUTPUT_HANDLE); if (console == INVALID_HANDLE_VALUE) return; if (!GetConsoleScreenBufferInfo(console, &info)) { return; } if (info.dwCursorPosition.Y == 0) its_my_console = 1; } static void win_pre_exit(sts) int sts; { if (sts == 0) return; if (its_my_console <= 0) return; fprintf(stderr, "Hit any key to exit..."); fflush(stderr); _getch(); } #endif #n699'>699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 

/* Python interpreter top-level routines, including init/exit */

#include "Python.h"

#include "Python-ast.h"
#undef Yield /* undefine macro conflicting with winbase.h */
#include "grammar.h"
#include "node.h"
#include "token.h"
#include "parsetok.h"
#include "errcode.h"
#include "code.h"
#include "symtable.h"
#include "ast.h"
#include "marshal.h"
#include "osdefs.h"
#include <locale.h>

#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif

#ifdef MS_WINDOWS
#include "malloc.h" /* for alloca */
#endif

#ifdef HAVE_LANGINFO_H
#include <langinfo.h>
#endif

#ifdef MS_WINDOWS
#undef BYTE
#include "windows.h"
#endif

_Py_IDENTIFIER(builtins);
_Py_IDENTIFIER(excepthook);
_Py_IDENTIFIER(flush);
_Py_IDENTIFIER(last_traceback);
_Py_IDENTIFIER(last_type);
_Py_IDENTIFIER(last_value);
_Py_IDENTIFIER(ps1);
_Py_IDENTIFIER(ps2);
_Py_IDENTIFIER(stdin);
_Py_IDENTIFIER(stdout);
_Py_IDENTIFIER(stderr);
_Py_static_string(PyId_string, "<string>");

#ifdef __cplusplus
extern "C" {
#endif

extern grammar _PyParser_Grammar; /* From graminit.c */

/* Forward */
static void flush_io(void);
static PyObject *run_mod(mod_ty, PyObject *, PyObject *, PyObject *,
                          PyCompilerFlags *, PyArena *);
static PyObject *run_pyc_file(FILE *, const char *, PyObject *, PyObject *,
                              PyCompilerFlags *);
static void err_input(perrdetail *);
static void err_free(perrdetail *);

/* Parse input from a file and execute it */

int
PyRun_AnyFileExFlags(FILE *fp, const char *filename, int closeit,
                     PyCompilerFlags *flags)
{
    if (filename == NULL)
        filename = "???";
    if (Py_FdIsInteractive(fp, filename)) {
        int err = PyRun_InteractiveLoopFlags(fp, filename, flags);
        if (closeit)
            fclose(fp);
        return err;
    }
    else
        return PyRun_SimpleFileExFlags(fp, filename, closeit, flags);
}

int
PyRun_InteractiveLoopFlags(FILE *fp, const char *filename_str, PyCompilerFlags *flags)
{
    PyObject *filename, *v;
    int ret, err;
    PyCompilerFlags local_flags;

    filename = PyUnicode_DecodeFSDefault(filename_str);
    if (filename == NULL) {
        PyErr_Print();
        return -1;
    }

    if (flags == NULL) {
        flags = &local_flags;
        local_flags.cf_flags = 0;
    }
    v = _PySys_GetObjectId(&PyId_ps1);
    if (v == NULL) {
        _PySys_SetObjectId(&PyId_ps1, v = PyUnicode_FromString(">>> "));
        Py_XDECREF(v);
    }
    v = _PySys_GetObjectId(&PyId_ps2);
    if (v == NULL) {
        _PySys_SetObjectId(&PyId_ps2, v = PyUnicode_FromString("... "));
        Py_XDECREF(v);
    }
    err = -1;
    for (;;) {
        ret = PyRun_InteractiveOneObject(fp, filename, flags);
        _PY_DEBUG_PRINT_TOTAL_REFS();
        if (ret == E_EOF) {
            err = 0;
            break;
        }
        /*
        if (ret == E_NOMEM)
            break;
        */
    }
    Py_DECREF(filename);
    return err;
}

/* compute parser flags based on compiler flags */
static int PARSER_FLAGS(PyCompilerFlags *flags)
{
    int parser_flags = 0;
    if (!flags)
        return 0;
    if (flags->cf_flags & PyCF_DONT_IMPLY_DEDENT)
        parser_flags |= PyPARSE_DONT_IMPLY_DEDENT;
    if (flags->cf_flags & PyCF_IGNORE_COOKIE)
        parser_flags |= PyPARSE_IGNORE_COOKIE;
    if (flags->cf_flags & CO_FUTURE_BARRY_AS_BDFL)
        parser_flags |= PyPARSE_BARRY_AS_BDFL;
    return parser_flags;
}

#if 0
/* Keep an example of flags with future keyword support. */
#define PARSER_FLAGS(flags) \
    ((flags) ? ((((flags)->cf_flags & PyCF_DONT_IMPLY_DEDENT) ? \
                  PyPARSE_DONT_IMPLY_DEDENT : 0) \
                | ((flags)->cf_flags & CO_FUTURE_WITH_STATEMENT ? \
                   PyPARSE_WITH_IS_KEYWORD : 0)) : 0)
#endif

int
PyRun_InteractiveOneObject(FILE *fp, PyObject *filename, PyCompilerFlags *flags)
{
    PyObject *m, *d, *v, *w, *oenc = NULL, *mod_name;
    mod_ty mod;
    PyArena *arena;
    char *ps1 = "", *ps2 = "", *enc = NULL;
    int errcode = 0;
    _Py_IDENTIFIER(encoding);
    _Py_IDENTIFIER(__main__);

    mod_name = _PyUnicode_FromId(&PyId___main__); /* borrowed */
    if (mod_name == NULL) {
        PyErr_Print();
        return -1;
    }

    if (fp == stdin) {
        /* Fetch encoding from sys.stdin if possible. */
        v = _PySys_GetObjectId(&PyId_stdin);
        if (v && v != Py_None) {
            oenc = _PyObject_GetAttrId(v, &PyId_encoding);
            if (oenc)
                enc = _PyUnicode_AsString(oenc);
            if (!enc)
                PyErr_Clear();
        }
    }
    v = _PySys_GetObjectId(&PyId_ps1);
    if (v != NULL) {
        v = PyObject_Str(v);
        if (v == NULL)
            PyErr_Clear();
        else if (PyUnicode_Check(v)) {
            ps1 = _PyUnicode_AsString(v);
            if (ps1 == NULL) {
                PyErr_Clear();
                ps1 = "";
            }
        }
    }
    w = _PySys_GetObjectId(&PyId_ps2);
    if (w != NULL) {
        w = PyObject_Str(w);
        if (w == NULL)
            PyErr_Clear();
        else if (PyUnicode_Check(w)) {
            ps2 = _PyUnicode_AsString(w);
            if (ps2 == NULL) {
                PyErr_Clear();
                ps2 = "";
            }
        }
    }
    arena = PyArena_New();
    if (arena == NULL) {
        Py_XDECREF(v);
        Py_XDECREF(w);
        Py_XDECREF(oenc);
        return -1;
    }
    mod = PyParser_ASTFromFileObject(fp, filename, enc,
                                     Py_single_input, ps1, ps2,
                                     flags, &errcode, arena);
    Py_XDECREF(v);
    Py_XDECREF(w);
    Py_XDECREF(oenc);
    if (mod == NULL) {
        PyArena_Free(arena);
        if (errcode == E_EOF) {
            PyErr_Clear();
            return E_EOF;
        }
        PyErr_Print();
        return -1;
    }
    m = PyImport_AddModuleObject(mod_name);
    if (m == NULL) {
        PyArena_Free(arena);
        return -1;
    }
    d = PyModule_GetDict(m);
    v = run_mod(mod, filename, d, d, flags, arena);
    PyArena_Free(arena);
    if (v == NULL) {
        PyErr_Print();
        flush_io();
        return -1;
    }
    Py_DECREF(v);
    flush_io();
    return 0;
}

int
PyRun_InteractiveOneFlags(FILE *fp, const char *filename_str, PyCompilerFlags *flags)
{
    PyObject *filename;
    int res;

    filename = PyUnicode_DecodeFSDefault(filename_str);
    if (filename == NULL) {
        PyErr_Print();
        return -1;
    }
    res = PyRun_InteractiveOneObject(fp, filename, flags);
    Py_DECREF(filename);
    return res;
}


/* Check whether a file maybe a pyc file: Look at the extension,
   the file type, and, if we may close it, at the first few bytes. */

static int
maybe_pyc_file(FILE *fp, const char* filename, const char* ext, int closeit)
{
    if (strcmp(ext, ".pyc") == 0)
        return 1;

    /* Only look into the file if we are allowed to close it, since
       it then should also be seekable. */
    if (closeit) {
        /* Read only two bytes of the magic. If the file was opened in
           text mode, the bytes 3 and 4 of the magic (\r\n) might not
           be read as they are on disk. */
        unsigned int halfmagic = PyImport_GetMagicNumber() & 0xFFFF;
        unsigned char buf[2];
        /* Mess:  In case of -x, the stream is NOT at its start now,
           and ungetc() was used to push back the first newline,
           which makes the current stream position formally undefined,
           and a x-platform nightmare.
           Unfortunately, we have no direct way to know whether -x
           was specified.  So we use a terrible hack:  if the current
           stream position is not 0, we assume -x was specified, and
           give up.  Bug 132850 on SourceForge spells out the
           hopelessness of trying anything else (fseek and ftell
           don't work predictably x-platform for text-mode files).
        */
        int ispyc = 0;
        if (ftell(fp) == 0) {
            if (fread(buf, 1, 2, fp) == 2 &&
                ((unsigned int)buf[1]<<8 | buf[0]) == halfmagic)
                ispyc = 1;
            rewind(fp);
        }
        return ispyc;
    }
    return 0;
}

static int
set_main_loader(PyObject *d, const char *filename, const char *loader_name)
{
    PyInterpreterState *interp;
    PyThreadState *tstate;
    PyObject *filename_obj, *bootstrap, *loader_type = NULL, *loader;
    int result = 0;

    filename_obj = PyUnicode_DecodeFSDefault(filename);
    if (filename_obj == NULL)
        return -1;
    /* Get current thread state and interpreter pointer */
    tstate = PyThreadState_GET();
    interp = tstate->interp;
    bootstrap = PyObject_GetAttrString(interp->importlib,
                                       "_bootstrap_external");
    if (bootstrap != NULL) {
        loader_type = PyObject_GetAttrString(bootstrap, loader_name);
        Py_DECREF(bootstrap);
    }
    if (loader_type == NULL) {
        Py_DECREF(filename_obj);
        return -1;
    }
    loader = PyObject_CallFunction(loader_type, "sN", "__main__", filename_obj);
    Py_DECREF(loader_type);
    if (loader == NULL) {
        return -1;
    }
    if (PyDict_SetItemString(d, "__loader__", loader) < 0) {
        result = -1;
    }
    Py_DECREF(loader);
    return result;
}

int
PyRun_SimpleFileExFlags(FILE *fp, const char *filename, int closeit,
                        PyCompilerFlags *flags)
{
    PyObject *m, *d, *v;
    const char *ext;
    int set_file_name = 0, ret = -1;
    size_t len;

    m = PyImport_AddModule("__main__");
    if (m == NULL)
        return -1;
    Py_INCREF(m);
    d = PyModule_GetDict(m);
    if (PyDict_GetItemString(d, "__file__") == NULL) {
        PyObject *f;
        f = PyUnicode_DecodeFSDefault(filename);
        if (f == NULL)
            goto done;
        if (PyDict_SetItemString(d, "__file__", f) < 0) {
            Py_DECREF(f);
            goto done;
        }
        if (PyDict_SetItemString(d, "__cached__", Py_None) < 0) {
            Py_DECREF(f);
            goto done;
        }
        set_file_name = 1;
        Py_DECREF(f);
    }
    len = strlen(filename);
    ext = filename + len - (len > 4 ? 4 : 0);
    if (maybe_pyc_file(fp, filename, ext, closeit)) {
        FILE *pyc_fp;
        /* Try to run a pyc file. First, re-open in binary */
        if (closeit)
            fclose(fp);
        if ((pyc_fp = _Py_fopen(filename, "rb")) == NULL) {
            fprintf(stderr, "python: Can't reopen .pyc file\n");
            goto done;
        }

        if (set_main_loader(d, filename, "SourcelessFileLoader") < 0) {
            fprintf(stderr, "python: failed to set __main__.__loader__\n");
            ret = -1;
            fclose(pyc_fp);
            goto done;
        }
        v = run_pyc_file(pyc_fp, filename, d, d, flags);
        fclose(pyc_fp);
    } else {
        /* When running from stdin, leave __main__.__loader__ alone */
        if (strcmp(filename, "<stdin>") != 0 &&
            set_main_loader(d, filename, "SourceFileLoader") < 0) {
            fprintf(stderr, "python: failed to set __main__.__loader__\n");
            ret = -1;
            goto done;
        }
        v = PyRun_FileExFlags(fp, filename, Py_file_input, d, d,
                              closeit, flags);
    }
    flush_io();
    if (v == NULL) {
        PyErr_Print();
        goto done;
    }
    Py_DECREF(v);
    ret = 0;
  done:
    if (set_file_name && PyDict_DelItemString(d, "__file__"))
        PyErr_Clear();
    Py_DECREF(m);
    return ret;
}

int
PyRun_SimpleStringFlags(const char *command, PyCompilerFlags *flags)
{
    PyObject *m, *d, *v;
    m = PyImport_AddModule("__main__");
    if (m == NULL)
        return -1;
    d = PyModule_GetDict(m);
    v = PyRun_StringFlags(command, Py_file_input, d, d, flags);
    if (v == NULL) {
        PyErr_Print();
        return -1;
    }
    Py_DECREF(v);
    return 0;
}

static int
parse_syntax_error(PyObject *err, PyObject **message, PyObject **filename,
                   int *lineno, int *offset, PyObject **text)
{
    long hold;
    PyObject *v;
    _Py_IDENTIFIER(msg);
    _Py_IDENTIFIER(filename);
    _Py_IDENTIFIER(lineno);
    _Py_IDENTIFIER(offset);
    _Py_IDENTIFIER(text);

    *message = NULL;
    *filename = NULL;

    /* new style errors.  `err' is an instance */
    *message = _PyObject_GetAttrId(err, &PyId_msg);
    if (!*message)
        goto finally;

    v = _PyObject_GetAttrId(err, &PyId_filename);
    if (!v)
        goto finally;
    if (v == Py_None) {
        Py_DECREF(v);
        *filename = _PyUnicode_FromId(&PyId_string);
        if (*filename == NULL)
            goto finally;
        Py_INCREF(*filename);
    }
    else {
        *filename = v;
    }

    v = _PyObject_GetAttrId(err, &PyId_lineno);
    if (!v)
        goto finally;
    hold = PyLong_AsLong(v);
    Py_DECREF(v);
    if (hold < 0 && PyErr_Occurred())
        goto finally;
    *lineno = (int)hold;

    v = _PyObject_GetAttrId(err, &PyId_offset);
    if (!v)
        goto finally;
    if (v == Py_None) {
        *offset = -1;
        Py_DECREF(v);
    } else {
        hold = PyLong_AsLong(v);
        Py_DECREF(v);
        if (hold < 0 && PyErr_Occurred())
            goto finally;
        *offset = (int)hold;
    }

    v = _PyObject_GetAttrId(err, &PyId_text);
    if (!v)
        goto finally;
    if (v == Py_None) {
        Py_DECREF(v);
        *text = NULL;
    }
    else {
        *text = v;
    }
    return 1;

finally:
    Py_XDECREF(*message);
    Py_XDECREF(*filename);
    return 0;
}

void
PyErr_Print(void)
{
    PyErr_PrintEx(1);
}

static void
print_error_text(PyObject *f, int offset, PyObject *text_obj)
{
    char *text;
    char *nl;

    text = _PyUnicode_AsString(text_obj);
    if (text == NULL)
        return;

    if (offset >= 0) {
        if (offset > 0 && (size_t)offset == strlen(text) && text[offset - 1] == '\n')
            offset--;
        for (;;) {
            nl = strchr(text, '\n');
            if (nl == NULL || nl-text >= offset)
                break;
            offset -= (int)(nl+1-text);
            text = nl+1;
        }
        while (*text == ' ' || *text == '\t') {
            text++;
            offset--;
        }
    }
    PyFile_WriteString("    ", f);
    PyFile_WriteString(text, f);
    if (*text == '\0' || text[strlen(text)-1] != '\n')
        PyFile_WriteString("\n", f);
    if (offset == -1)
        return;
    PyFile_WriteString("    ", f);
    while (--offset > 0)
        PyFile_WriteString(" ", f);
    PyFile_WriteString("^\n", f);
}

static void
handle_system_exit(void)
{
    PyObject *exception, *value, *tb;
    int exitcode = 0;

    if (Py_InspectFlag)
        /* Don't exit if -i flag was given. This flag is set to 0
         * when entering interactive mode for inspecting. */
        return;

    PyErr_Fetch(&exception, &value, &tb);
    fflush(stdout);
    if (value == NULL || value == Py_None)
        goto done;
    if (PyExceptionInstance_Check(value)) {
        /* The error code should be in the `code' attribute. */
        _Py_IDENTIFIER(code);
        PyObject *code = _PyObject_GetAttrId(value, &PyId_code);
        if (code) {
            Py_DECREF(value);
            value = code;
            if (value == Py_None)
                goto done;
        }
        /* If we failed to dig out the 'code' attribute,
           just let the else clause below print the error. */
    }
    if (PyLong_Check(value))
        exitcode = (int)PyLong_AsLong(value);
    else {
        PyObject *sys_stderr = _PySys_GetObjectId(&PyId_stderr);
        /* We clear the exception here to avoid triggering the assertion
         * in PyObject_Str that ensures it won't silently lose exception
         * details.
         */
        PyErr_Clear();
        if (sys_stderr != NULL && sys_stderr != Py_None) {
            PyFile_WriteObject(value, sys_stderr, Py_PRINT_RAW);
        } else {
            PyObject_Print(value, stderr, Py_PRINT_RAW);
            fflush(stderr);
        }
        PySys_WriteStderr("\n");
        exitcode = 1;
    }
 done:
    /* Restore and clear the exception info, in order to properly decref
     * the exception, value, and traceback.      If we just exit instead,
     * these leak, which confuses PYTHONDUMPREFS output, and may prevent
     * some finalizers from running.
     */
    PyErr_Restore(exception, value, tb);
    PyErr_Clear();
    Py_Exit(exitcode);
    /* NOTREACHED */
}

void
PyErr_PrintEx(int set_sys_last_vars)
{
    PyObject *exception, *v, *tb, *hook;

    if (PyErr_ExceptionMatches(PyExc_SystemExit)) {
        handle_system_exit();
    }
    PyErr_Fetch(&exception, &v, &tb);
    if (exception == NULL)
        return;
    PyErr_NormalizeException(&exception, &v, &tb);
    if (tb == NULL) {
        tb = Py_None;
        Py_INCREF(tb);
    }
    PyException_SetTraceback(v, tb);
    if (exception == NULL)
        return;
    /* Now we know v != NULL too */
    if (set_sys_last_vars) {
        _PySys_SetObjectId(&PyId_last_type, exception);
        _PySys_SetObjectId(&PyId_last_value, v);
        _PySys_SetObjectId(&PyId_last_traceback, tb);
    }
    hook = _PySys_GetObjectId(&PyId_excepthook);
    if (hook) {
        PyObject *args = PyTuple_Pack(3, exception, v, tb);
        PyObject *result = PyEval_CallObject(hook, args);
        if (result == NULL) {
            PyObject *exception2, *v2, *tb2;
            if (PyErr_ExceptionMatches(PyExc_SystemExit)) {
                handle_system_exit();
            }
            PyErr_Fetch(&exception2, &v2, &tb2);
            PyErr_NormalizeException(&exception2, &v2, &tb2);
            /* It should not be possible for exception2 or v2
               to be NULL. However PyErr_Display() can't
               tolerate NULLs, so just be safe. */
            if (exception2 == NULL) {
                exception2 = Py_None;
                Py_INCREF(exception2);
            }
            if (v2 == NULL) {
                v2 = Py_None;
                Py_INCREF(v2);
            }
            fflush(stdout);
            PySys_WriteStderr("Error in sys.excepthook:\n");
            PyErr_Display(exception2, v2, tb2);
            PySys_WriteStderr("\nOriginal exception was:\n");
            PyErr_Display(exception, v, tb);
            Py_DECREF(exception2);
            Py_DECREF(v2);
            Py_XDECREF(tb2);
        }
        Py_XDECREF(result);
        Py_XDECREF(args);
    } else {
        PySys_WriteStderr("sys.excepthook is missing\n");
        PyErr_Display(exception, v, tb);
    }
    Py_XDECREF(exception);
    Py_XDECREF(v);
    Py_XDECREF(tb);
}

static void
print_exception(PyObject *f, PyObject *value)
{
    int err = 0;
    PyObject *type, *tb;
    _Py_IDENTIFIER(print_file_and_line);

    if (!PyExceptionInstance_Check(value)) {
        err = PyFile_WriteString("TypeError: print_exception(): Exception expected for value, ", f);
        err += PyFile_WriteString(Py_TYPE(value)->tp_name, f);
        err += PyFile_WriteString(" found\n", f);
        if (err)
            PyErr_Clear();
        return;
    }

    Py_INCREF(value);
    fflush(stdout);
    type = (PyObject *) Py_TYPE(value);
    tb = PyException_GetTraceback(value);
    if (tb && tb != Py_None)
        err = PyTraceBack_Print(tb, f);
    if (err == 0 &&
        _PyObject_HasAttrId(value, &PyId_print_file_and_line))
    {
        PyObject *message, *filename, *text;
        int lineno, offset;
        if (!parse_syntax_error(value, &message, &filename,
                                &lineno, &offset, &text))
            PyErr_Clear();
        else {
            PyObject *line;

            Py_DECREF(value);
            value = message;

            line = PyUnicode_FromFormat("  File \"%U\", line %d\n",
                                          filename, lineno);
            Py_DECREF(filename);
            if (line != NULL) {
                PyFile_WriteObject(line, f, Py_PRINT_RAW);
                Py_DECREF(line);
            }

            if (text != NULL) {
                print_error_text(f, offset, text);
                Py_DECREF(text);
            }

            /* Can't be bothered to check all those
               PyFile_WriteString() calls */
            if (PyErr_Occurred())
                err = -1;
        }
    }
    if (err) {
        /* Don't do anything else */
    }
    else {
        PyObject* moduleName;
        char* className;
        _Py_IDENTIFIER(__module__);
        assert(PyExceptionClass_Check(type));
        className = PyExceptionClass_Name(type);
        if (className != NULL) {
            char *dot = strrchr(className, '.');
            if (dot != NULL)
                className = dot+1;
        }

        moduleName = _PyObject_GetAttrId(type, &PyId___module__);
        if (moduleName == NULL || !PyUnicode_Check(moduleName))
        {
            Py_XDECREF(moduleName);
            err = PyFile_WriteString("<unknown>", f);
        }
        else {
            if (_PyUnicode_CompareWithId(moduleName, &PyId_builtins) != 0)
            {
                err = PyFile_WriteObject(moduleName, f, Py_PRINT_RAW);
                err += PyFile_WriteString(".", f);
            }
            Py_DECREF(moduleName);
        }
        if (err == 0) {
            if (className == NULL)
                      err = PyFile_WriteString("<unknown>", f);
            else
                      err = PyFile_WriteString(className, f);
        }
    }
    if (err == 0 && (value != Py_None)) {
        PyObject *s = PyObject_Str(value);
        /* only print colon if the str() of the
           object is not the empty string
        */
        if (s == NULL)
            err = -1;
        else if (!PyUnicode_Check(s) ||
            PyUnicode_GetLength(s) != 0)
            err = PyFile_WriteString(": ", f);
        if (err == 0)
          err = PyFile_WriteObject(s, f, Py_PRINT_RAW);
        Py_XDECREF(s);
    }
    /* try to write a newline in any case */
    err += PyFile_WriteString("\n", f);
    Py_XDECREF(tb);
    Py_DECREF(value);
    /* If an error happened here, don't show it.
       XXX This is wrong, but too many callers rely on this behavior. */
    if (err != 0)
        PyErr_Clear();
}

static const char *cause_message =
    "\nThe above exception was the direct cause "
    "of the following exception:\n\n";

static const char *context_message =
    "\nDuring handling of the above exception, "
    "another exception occurred:\n\n";

static void
print_exception_recursive(PyObject *f, PyObject *value, PyObject *seen)
{
    int err = 0, res;
    PyObject *cause, *context;

    if (seen != NULL) {
        /* Exception chaining */
        if (PySet_Add(seen, value) == -1)
            PyErr_Clear();
        else if (PyExceptionInstance_Check(value)) {
            cause = PyException_GetCause(value);
            context = PyException_GetContext(value);
            if (cause) {
                res = PySet_Contains(seen, cause);
                if (res == -1)
                    PyErr_Clear();
                if (res == 0) {
                    print_exception_recursive(
                        f, cause, seen);
                    err |= PyFile_WriteString(
                        cause_message, f);
                }
            }
            else if (context &&
                !((PyBaseExceptionObject *)value)->suppress_context) {
                res = PySet_Contains(seen, context);
                if (res == -1)
                    PyErr_Clear();
                if (res == 0) {
                    print_exception_recursive(
                        f, context, seen);
                    err |= PyFile_WriteString(
                        context_message, f);
                }
            }
            Py_XDECREF(context);
            Py_XDECREF(cause);
        }
    }
    print_exception(f, value);
    if (err != 0)
        PyErr_Clear();
}

void
PyErr_Display(PyObject *exception, PyObject *value, PyObject *tb)
{
    PyObject *seen;
    PyObject *f = _PySys_GetObjectId(&PyId_stderr);
    if (PyExceptionInstance_Check(value)
        && tb != NULL && PyTraceBack_Check(tb)) {
        /* Put the traceback on the exception, otherwise it won't get
           displayed.  See issue #18776. */
        PyObject *cur_tb = PyException_GetTraceback(value);
        if (cur_tb == NULL)
            PyException_SetTraceback(value, tb);
        else
            Py_DECREF(cur_tb);
    }
    if (f == Py_None) {
        /* pass */
    }
    else if (f == NULL) {
        _PyObject_Dump(value);
        fprintf(stderr, "lost sys.stderr\n");
    }
    else {
        /* We choose to ignore seen being possibly NULL, and report
           at least the main exception (it could be a MemoryError).
        */
        seen = PySet_New(NULL);
        if (seen == NULL)
            PyErr_Clear();
        print_exception_recursive(f, value, seen);
        Py_XDECREF(seen);
    }
}

PyObject *
PyRun_StringFlags(const char *str, int start, PyObject *globals,
                  PyObject *locals, PyCompilerFlags *flags)
{
    PyObject *ret = NULL;
    mod_ty mod;
    PyArena *arena;
    PyObject *filename;

    filename = _PyUnicode_FromId(&PyId_string); /* borrowed */
    if (filename == NULL)
        return NULL;

    arena = PyArena_New();
    if (arena == NULL)
        return NULL;

    mod = PyParser_ASTFromStringObject(str, filename, start, flags, arena);
    if (mod != NULL)
        ret = run_mod(mod, filename, globals, locals, flags, arena);
    PyArena_Free(arena);
    return ret;
}

PyObject *
PyRun_FileExFlags(FILE *fp, const char *filename_str, int start, PyObject *globals,
                  PyObject *locals, int closeit, PyCompilerFlags *flags)
{
    PyObject *ret = NULL;
    mod_ty mod;
    PyArena *arena = NULL;
    PyObject *filename;

    filename = PyUnicode_DecodeFSDefault(filename_str);
    if (filename == NULL)
        goto exit;

    arena = PyArena_New();
    if (arena == NULL)
        goto exit;

    mod = PyParser_ASTFromFileObject(fp, filename, NULL, start, 0, 0,
                                     flags, NULL, arena);
    if (closeit)
        fclose(fp);
    if (mod == NULL) {
        goto exit;
    }
    ret = run_mod(mod, filename, globals, locals, flags, arena);

exit:
    Py_XDECREF(filename);
    if (arena != NULL)
        PyArena_Free(arena);
    return ret;
}

static void
flush_io(void)
{
    PyObject *f, *r;
    PyObject *type, *value, *traceback;

    /* Save the current exception */
    PyErr_Fetch(&type, &value, &traceback);

    f = _PySys_GetObjectId(&PyId_stderr);
    if (f != NULL) {
        r = _PyObject_CallMethodId(f, &PyId_flush, "");
        if (r)
            Py_DECREF(r);
        else
            PyErr_Clear();
    }
    f = _PySys_GetObjectId(&PyId_stdout);
    if (f != NULL) {
        r = _PyObject_CallMethodId(f, &PyId_flush, "");
        if (r)
            Py_DECREF(r);
        else
            PyErr_Clear();
    }

    PyErr_Restore(type, value, traceback);
}

static PyObject *
run_mod(mod_ty mod, PyObject *filename, PyObject *globals, PyObject *locals,
            PyCompilerFlags *flags, PyArena *arena)
{
    PyCodeObject *co;
    PyObject *v;
    co = PyAST_CompileObject(mod, filename, flags, -1, arena);
    if (co == NULL)
        return NULL;
    v = PyEval_EvalCode((PyObject*)co, globals, locals);
    Py_DECREF(co);
    return v;
}

static PyObject *
run_pyc_file(FILE *fp, const char *filename, PyObject *globals,
             PyObject *locals, PyCompilerFlags *flags)
{
    PyCodeObject *co;
    PyObject *v;
    long magic;
    long PyImport_GetMagicNumber(void);

    magic = PyMarshal_ReadLongFromFile(fp);
    if (magic != PyImport_GetMagicNumber()) {
        if (!PyErr_Occurred())
            PyErr_SetString(PyExc_RuntimeError,
                       "Bad magic number in .pyc file");
        return NULL;
    }
    /* Skip mtime and size */
    (void) PyMarshal_ReadLongFromFile(fp);
    (void) PyMarshal_ReadLongFromFile(fp);
    if (PyErr_Occurred())
        return NULL;

    v = PyMarshal_ReadLastObjectFromFile(fp);
    if (v == NULL || !PyCode_Check(v)) {
        Py_XDECREF(v);
        PyErr_SetString(PyExc_RuntimeError,
                   "Bad code object in .pyc file");
        return NULL;
    }
    co = (PyCodeObject *)v;
    v = PyEval_EvalCode((PyObject*)co, globals, locals);
    if (v && flags)
        flags->cf_flags |= (co->co_flags & PyCF_MASK);
    Py_DECREF(co);
    return v;
}

PyObject *
Py_CompileStringObject(const char *str, PyObject *filename, int start,
                       PyCompilerFlags *flags, int optimize)
{
    PyCodeObject *co;
    mod_ty mod;
    PyArena *arena = PyArena_New();
    if (arena == NULL)
        return NULL;

    mod = PyParser_ASTFromStringObject(str, filename, start, flags, arena);
    if (mod == NULL) {
        PyArena_Free(arena);
        return NULL;
    }
    if (flags && (flags->cf_flags & PyCF_ONLY_AST)) {
        PyObject *result = PyAST_mod2obj(mod);
        PyArena_Free(arena);
        return result;
    }
    co = PyAST_CompileObject(mod, filename, flags, optimize, arena);
    PyArena_Free(arena);
    return (PyObject *)co;
}

PyObject *
Py_CompileStringExFlags(const char *str, const char *filename_str, int start,
                        PyCompilerFlags *flags, int optimize)
{
    PyObject *filename, *co;
    filename = PyUnicode_DecodeFSDefault(filename_str);
    if (filename == NULL)
        return NULL;
    co = Py_CompileStringObject(str, filename, start, flags, optimize);
    Py_DECREF(filename);
    return co;
}

/* For use in Py_LIMITED_API */
#undef Py_CompileString
PyObject *
PyCompileString(const char *str, const char *filename, int start)
{
    return Py_CompileStringFlags(str, filename, start, NULL);
}

struct symtable *
Py_SymtableStringObject(const char *str, PyObject *filename, int start)
{
    struct symtable *st;
    mod_ty mod;
    PyCompilerFlags flags;
    PyArena *arena;

    arena = PyArena_New();
    if (arena == NULL)
        return NULL;

    flags.cf_flags = 0;
    mod = PyParser_ASTFromStringObject(str, filename, start, &flags, arena);
    if (mod == NULL) {
        PyArena_Free(arena);
        return NULL;
    }
    st = PySymtable_BuildObject(mod, filename, 0);
    PyArena_Free(arena);
    return st;
}

struct symtable *
Py_SymtableString(const char *str, const char *filename_str, int start)
{
    PyObject *filename;
    struct symtable *st;

    filename = PyUnicode_DecodeFSDefault(filename_str);
    if (filename == NULL)
        return NULL;
    st = Py_SymtableStringObject(str, filename, start);
    Py_DECREF(filename);
    return st;
}

/* Preferred access to parser is through AST. */
mod_ty
PyParser_ASTFromStringObject(const char *s, PyObject *filename, int start,
                             PyCompilerFlags *flags, PyArena *arena)
{
    mod_ty mod;
    PyCompilerFlags localflags;
    perrdetail err;
    int iflags = PARSER_FLAGS(flags);

    node *n = PyParser_ParseStringObject(s, filename,
                                         &_PyParser_Grammar, start, &err,
                                         &iflags);
    if (flags == NULL) {
        localflags.cf_flags = 0;
        flags = &localflags;
    }
    if (n) {
        flags->cf_flags |= iflags & PyCF_MASK;
        mod = PyAST_FromNodeObject(n, flags, filename, arena);
        PyNode_Free(n);
    }
    else {
        err_input(&err);
        mod = NULL;
    }
    err_free(&err);
    return mod;
}

mod_ty
PyParser_ASTFromString(const char *s, const char *filename_str, int start,
                       PyCompilerFlags *flags, PyArena *arena)
{
    PyObject *filename;
    mod_ty mod;
    filename = PyUnicode_DecodeFSDefault(filename_str);
    if (filename == NULL)
        return NULL;
    mod = PyParser_ASTFromStringObject(s, filename, start, flags, arena);
    Py_DECREF(filename);
    return mod;
}

mod_ty
PyParser_ASTFromFileObject(FILE *fp, PyObject *filename, const char* enc,
                           int start, char *ps1,
                           char *ps2, PyCompilerFlags *flags, int *errcode,
                           PyArena *arena)
{
    mod_ty mod;
    PyCompilerFlags localflags;
    perrdetail err;
    int iflags = PARSER_FLAGS(flags);

    node *n = PyParser_ParseFileObject(fp, filename, enc,
                                       &_PyParser_Grammar,
                                       start, ps1, ps2, &err, &iflags);
    if (flags == NULL) {
        localflags.cf_flags = 0;
        flags = &localflags;
    }
    if (n) {
        flags->cf_flags |= iflags & PyCF_MASK;
        mod = PyAST_FromNodeObject(n, flags, filename, arena);
        PyNode_Free(n);
    }
    else {
        err_input(&err);
        if (errcode)
            *errcode = err.error;
        mod = NULL;
    }
    err_free(&err);
    return mod;
}

mod_ty
PyParser_ASTFromFile(FILE *fp, const char *filename_str, const char* enc,
                     int start, char *ps1,
                     char *ps2, PyCompilerFlags *flags, int *errcode,
                     PyArena *arena)
{
    mod_ty mod;
    PyObject *filename;
    filename = PyUnicode_DecodeFSDefault(filename_str);
    if (filename == NULL)
        return NULL;
    mod = PyParser_ASTFromFileObject(fp, filename, enc, start, ps1, ps2,
                                     flags, errcode, arena);
    Py_DECREF(filename);
    return mod;
}

/* Simplified interface to parsefile -- return node or set exception */

node *
PyParser_SimpleParseFileFlags(FILE *fp, const char *filename, int start, int flags)
{
    perrdetail err;
    node *n = PyParser_ParseFileFlags(fp, filename, NULL,
                                      &_PyParser_Grammar,
                                      start, NULL, NULL, &err, flags);
    if (n == NULL)
        err_input(&err);
    err_free(&err);

    return n;
}

/* Simplified interface to parsestring -- return node or set exception */

node *
PyParser_SimpleParseStringFlags(const char *str, int start, int flags)
{
    perrdetail err;
    node *n = PyParser_ParseStringFlags(str, &_PyParser_Grammar,
                                        start, &err, flags);
    if (n == NULL)
        err_input(&err);
    err_free(&err);
    return n;
}

node *
PyParser_SimpleParseStringFlagsFilename(const char *str, const char *filename,
                                        int start, int flags)
{
    perrdetail err;
    node *n = PyParser_ParseStringFlagsFilename(str, filename,
                            &_PyParser_Grammar, start, &err, flags);
    if (n == NULL)
        err_input(&err);
    err_free(&err);
    return n;
}

node *
PyParser_SimpleParseStringFilename(const char *str, const char *filename, int start)
{
    return PyParser_SimpleParseStringFlagsFilename(str, filename, start, 0);
}

/* May want to move a more generalized form of this to parsetok.c or
   even parser modules. */

void
PyParser_ClearError(perrdetail *err)
{
    err_free(err);
}

void
PyParser_SetError(perrdetail *err)
{
    err_input(err);
}

static void
err_free(perrdetail *err)
{
    Py_CLEAR(err->filename);
}

/* Set the error appropriate to the given input error code (see errcode.h) */

static void
err_input(perrdetail *err)
{
    PyObject *v, *w, *errtype, *errtext;
    PyObject *msg_obj = NULL;
    char *msg = NULL;
    int offset = err->offset;

    errtype = PyExc_SyntaxError;
    switch (err->error) {
    case E_ERROR:
        return;
    case E_SYNTAX:
        errtype = PyExc_IndentationError;
        if (err->expected == INDENT)
            msg = "expected an indented block";
        else if (err->token == INDENT)
            msg = "unexpected indent";
        else if (err->token == DEDENT)
            msg = "unexpected unindent";
        else {
            errtype = PyExc_SyntaxError;
            msg = "invalid syntax";
        }
        break;
    case E_TOKEN:
        msg = "invalid token";
        break;
    case E_EOFS:
        msg = "EOF while scanning triple-quoted string literal";
        break;
    case E_EOLS:
        msg = "EOL while scanning string literal";
        break;
    case E_INTR:
        if (!PyErr_Occurred())
            PyErr_SetNone(PyExc_KeyboardInterrupt);
        goto cleanup;
    case E_NOMEM:
        PyErr_NoMemory();
        goto cleanup;
    case E_EOF:
        msg = "unexpected EOF while parsing";
        break;
    case E_TABSPACE:
        errtype = PyExc_TabError;
        msg = "inconsistent use of tabs and spaces in indentation";
        break;
    case E_OVERFLOW:
        msg = "expression too long";
        break;
    case E_DEDENT:
        errtype = PyExc_IndentationError;
        msg = "unindent does not match any outer indentation level";
        break;
    case E_TOODEEP:
        errtype = PyExc_IndentationError;
        msg = "too many levels of indentation";
        break;
    case E_DECODE: {
        PyObject *type, *value, *tb;
        PyErr_Fetch(&type, &value, &tb);
        msg = "unknown decode error";
        if (value != NULL)
            msg_obj = PyObject_Str(value);
        Py_XDECREF(type);
        Py_XDECREF(value);
        Py_XDECREF(tb);
        break;
    }
    case E_LINECONT:
        msg = "unexpected character after line continuation character";
        break;

    case E_IDENTIFIER:
        msg = "invalid character in identifier";
        break;
    case E_BADSINGLE:
        msg = "multiple statements found while compiling a single statement";
        break;
    default:
        fprintf(stderr, "error=%d\n", err->error);
        msg = "unknown parsing error";
        break;
    }
    /* err->text may not be UTF-8 in case of decoding errors.
       Explicitly convert to an object. */
    if (!err->text) {
        errtext = Py_None;
        Py_INCREF(Py_None);
    } else {
        errtext = PyUnicode_DecodeUTF8(err->text, err->offset,
                                       "replace");
        if (errtext != NULL) {
            Py_ssize_t len = strlen(err->text);
            offset = (int)PyUnicode_GET_LENGTH(errtext);
            if (len != err->offset) {
                Py_DECREF(errtext);
                errtext = PyUnicode_DecodeUTF8(err->text, len,
                                               "replace");
            }
        }
    }
    v = Py_BuildValue("(OiiN)", err->filename,
                      err->lineno, offset, errtext);
    if (v != NULL) {
        if (msg_obj)
            w = Py_BuildValue("(OO)", msg_obj, v);
        else
            w = Py_BuildValue("(sO)", msg, v);
    } else
        w = NULL;
    Py_XDECREF(v);
    PyErr_SetObject(errtype, w);
    Py_XDECREF(w);
cleanup:
    Py_XDECREF(msg_obj);
    if (err->text != NULL) {
        PyObject_FREE(err->text);
        err->text = NULL;
    }
}


#if defined(USE_STACKCHECK)
#if defined(WIN32) && defined(_MSC_VER)

/* Stack checking for Microsoft C */

#include <malloc.h>
#include <excpt.h>

/*
 * Return non-zero when we run out of memory on the stack; zero otherwise.
 */
int
PyOS_CheckStack(void)
{
    __try {
        /* alloca throws a stack overflow exception if there's
           not enough space left on the stack */
        alloca(PYOS_STACK_MARGIN * sizeof(void*));
        return 0;
    } __except (GetExceptionCode() == STATUS_STACK_OVERFLOW ?
                    EXCEPTION_EXECUTE_HANDLER :
            EXCEPTION_CONTINUE_SEARCH) {
        int errcode = _resetstkoflw();
        if (errcode == 0)
        {
            Py_FatalError("Could not reset the stack!");
        }
    }
    return 1;
}

#endif /* WIN32 && _MSC_VER */

/* Alternate implementations can be added here... */

#endif /* USE_STACKCHECK */

/* Deprecated C API functions still provided for binary compatiblity */

#undef PyParser_SimpleParseFile
PyAPI_FUNC(node *)
PyParser_SimpleParseFile(FILE *fp, const char *filename, int start)
{
    return PyParser_SimpleParseFileFlags(fp, filename, start, 0);
}

#undef PyParser_SimpleParseString
PyAPI_FUNC(node *)
PyParser_SimpleParseString(const char *str, int start)
{
    return PyParser_SimpleParseStringFlags(str, start, 0);
}

#undef PyRun_AnyFile
PyAPI_FUNC(int)
PyRun_AnyFile(FILE *fp, const char *name)
{
    return PyRun_AnyFileExFlags(fp, name, 0, NULL);
}

#undef PyRun_AnyFileEx
PyAPI_FUNC(int)
PyRun_AnyFileEx(FILE *fp, const char *name, int closeit)
{
    return PyRun_AnyFileExFlags(fp, name, closeit, NULL);
}

#undef PyRun_AnyFileFlags
PyAPI_FUNC(int)
PyRun_AnyFileFlags(FILE *fp, const char *name, PyCompilerFlags *flags)
{
    return PyRun_AnyFileExFlags(fp, name, 0, flags);
}

#undef PyRun_File
PyAPI_FUNC(PyObject *)
PyRun_File(FILE *fp, const char *p, int s, PyObject *g, PyObject *l)
{
    return PyRun_FileExFlags(fp, p, s, g, l, 0, NULL);
}

#undef PyRun_FileEx
PyAPI_FUNC(PyObject *)
PyRun_FileEx(FILE *fp, const char *p, int s, PyObject *g, PyObject *l, int c)
{
    return PyRun_FileExFlags(fp, p, s, g, l, c, NULL);
}

#undef PyRun_FileFlags
PyAPI_FUNC(PyObject *)
PyRun_FileFlags(FILE *fp, const char *p, int s, PyObject *g, PyObject *l,
                PyCompilerFlags *flags)
{
    return PyRun_FileExFlags(fp, p, s, g, l, 0, flags);
}

#undef PyRun_SimpleFile
PyAPI_FUNC(int)
PyRun_SimpleFile(FILE *f, const char *p)
{
    return PyRun_SimpleFileExFlags(f, p, 0, NULL);
}

#undef PyRun_SimpleFileEx
PyAPI_FUNC(int)
PyRun_SimpleFileEx(FILE *f, const char *p, int c)
{
    return PyRun_SimpleFileExFlags(f, p, c, NULL);
}


#undef PyRun_String
PyAPI_FUNC(PyObject *)
PyRun_String(const char *str, int s, PyObject *g, PyObject *l)
{
    return PyRun_StringFlags(str, s, g, l, NULL);
}

#undef PyRun_SimpleString
PyAPI_FUNC(int)
PyRun_SimpleString(const char *s)
{
    return PyRun_SimpleStringFlags(s, NULL);
}

#undef Py_CompileString
PyAPI_FUNC(PyObject *)
Py_CompileString(const char *str, const char *p, int s)
{
    return Py_CompileStringExFlags(str, p, s, NULL, -1);
}

#undef Py_CompileStringFlags
PyAPI_FUNC(PyObject *)
Py_CompileStringFlags(const char *str, const char *p, int s,
                      PyCompilerFlags *flags)
{
    return Py_CompileStringExFlags(str, p, s, flags, -1);
}

#undef PyRun_InteractiveOne
PyAPI_FUNC(int)
PyRun_InteractiveOne(FILE *f, const char *p)
{
    return PyRun_InteractiveOneFlags(f, p, NULL);
}

#undef PyRun_InteractiveLoop
PyAPI_FUNC(int)
PyRun_InteractiveLoop(FILE *f, const char *p)
{
    return PyRun_InteractiveLoopFlags(f, p, NULL);
}

#ifdef __cplusplus
}
#endif
generated by cgit v0.12 at 2026-01-24 16:37:10 (GMT)