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cpython/Python/pythonrun.c
Jeremy Hylton 94988067b9 Add new parser error code, E_OVERFLOW. This error is returned when 
the number of children of a node exceeds the max possible value for
the short that is used to count them.  The Python runtime converts
this parser error into the SyntaxError "expression too long."
2000-06-20 19:10:44 +00:00

1197 lines
26 KiB
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/***********************************************************
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 <unistd.h>
#endif
#ifdef HAVE_SIGNAL_H
#include <signal.h>
#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));
#ifdef Py_TRACE_REFS
int _Py_AskYesNo(char *prompt);
#endif
extern void _PyUnicode_Init();
extern void _PyUnicode_Fini();
extern void _PyCodecRegistry_Init();
extern void _PyCodecRegistry_Fini();
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: deprecated */
int Py_FrozenFlag; /* Needed by getpath.c */
int Py_UnicodeFlag = 0; /* Needed by compile.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.)
*/
void
Py_Initialize()
{
PyInterpreterState *interp;
PyThreadState *tstate;
PyObject *bimod, *sysmod;
char *p;
if (initialized)
return;
initialized = 1;
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");
/* Init codec registry */
_PyCodecRegistry_Init();
/* Init Unicode implementation; relies on the codec registry */
_PyUnicode_Init();
_PyCompareState_Key = PyString_InternFromString("cmp_state");
bimod = _PyBuiltin_Init();
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);
_PyImport_Init();
/* initialize builtin exceptions */
init_exceptions();
/* phase 2 of builtins */
_PyImport_FixupExtension("__builtin__", "__builtin__");
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();
/* Cleanup Unicode implementation */
_PyUnicode_Fini();
/* Cleanup Codec registry */
_PyCodecRegistry_Fini();
/* 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 (
#ifdef MS_WINDOWS /* Only ask on Windows if env var set */
getenv("PYTHONDUMPREFS") &&
#endif /* MS_WINDOWS */
_Py_AskYesNo("Print left references?")) {
_Py_PrintReferences(stderr);
}
#endif /* Py_TRACE_REFS */
/* 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.
*/
fini_exceptions();
/* Delete current thread */
PyInterpreterState_Clear(interp);
PyThreadState_Swap(NULL);
PyInterpreterState_Delete(interp);
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)
PyMem_DEL(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("<string>", 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("<unknown>", 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("<unknown>", 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),
"<string>", 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) {
PyMem_DEL(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;
case E_OVERFLOW:
msg = "expression too long";
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
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 "<stdin>" 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, "<stdin>") == 0) ||
(strcmp(filename, "???") == 0);
}
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