/***********************************************************

Copyright 1991, 1992, 1993, 1994 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 not be used in advertising or publicity pertaining to

distribution of the software without specific, written prior permission.

STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO

THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND

FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM 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 "allobjects.h"

#include "grammar.h"

#include "node.h"

#include "parsetok.h"

#include "graminit.h"

#include "errcode.h"

#include "sysmodule.h"

#include "compile.h"

#include "eval.h"

#include "ceval.h"

#include "pythonrun.h"

#include "import.h"

#include "marshal.h"

#ifdef HAVE_SIGNAL_H

#include <signal.h>

#endif

extern char *getpythonpath();

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

/* Forward */

static object *run_err_node PROTO((node *n, char *filename,

object *globals, object *locals));

static object *run_node PROTO((node *n, char *filename,

object *globals, object *locals));

static void err_input PROTO((perrdetail *));

static void initsigs PROTO((void));

int debugging; /* Needed by parser.c */

int verbose; /* Needed by import.c */

int suppress_print; /* Needed by ceval.c */

/* Initialize all */

void

initall()

{

static int inited;

if (inited)

return;

inited = 1;

initimport();

/* Modules '__builtin__' and 'sys' are initialized here,

they are needed by random bits of the interpreter.

All other modules are optional and are initialized

when they are first imported. */

initbuiltin(); /* Also initializes builtin exceptions */

initsys();

setpythonpath(getpythonpath());

initsigs(); /* Signal handling stuff, including initintr() */

}

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

int

run(fp, filename)

FILE *fp;

char *filename;

{

if (filename == NULL)

filename = "???";

if (isatty((int)fileno(fp)))

return run_tty_loop(fp, filename);

else

return run_script(fp, filename);

}

int

run_tty_loop(fp, filename)

FILE *fp;

char *filename;

{

object *v;

int ret;

v = sysget("ps1");

if (v == NULL) {

sysset("ps1", v = newstringobject(">>> "));

XDECREF(v);

}

v = sysget("ps2");

if (v == NULL) {

sysset("ps2", v = newstringobject("... "));

XDECREF(v);

}

for (;;) {

ret = run_tty_1(fp, filename);

#ifdef REF_DEBUG

fprintf(stderr, "[%ld refs]\n", ref_total);

#endif

if (ret == E_EOF)

return 0;

/*

if (ret == E_NOMEM)

return -1;

*/

}

}

int

run_tty_1(fp, filename)

FILE *fp;

char *filename;

{

object *m, *d, *v, *w;

node *n;

perrdetail err;

char *ps1, *ps2;

v = sysget("ps1");

w = sysget("ps2");

if (v != NULL && is_stringobject(v)) {

INCREF(v);

ps1 = getstringvalue(v);

}

else {

v = NULL;

ps1 = "";

}

if (w != NULL && is_stringobject(w)) {

INCREF(w);

ps2 = getstringvalue(w);

}

else {

w = NULL;

ps2 = "";

}

BGN_SAVE

n = parsefile(fp, filename, &gram, single_input, ps1, ps2, &err);

END_SAVE

XDECREF(v);

XDECREF(w);

if (n == NULL) {

if (err.error == E_EOF) {

if (err.text)

free(err.text);

return E_EOF;

}

err_input(&err);

print_error();

return err.error;

}

m = add_module("__main__");

if (m == NULL)

return -1;

d = getmoduledict(m);

v = run_node(n, filename, d, d);

flushline();

if (v == NULL) {

print_error();

return -1;

}

DECREF(v);

return 0;

}

int

run_script(fp, filename)

FILE *fp;

char *filename;

{

object *m, *d, *v;

char *ext;

m = add_module("__main__");

if (m == NULL)

return -1;

d = getmoduledict(m);

ext = filename + strlen(filename) - 4;

if ( strcmp(ext, ".pyc") == 0 ) {

/* 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;

}

v = run_pyc_file(fp, filename, d, d);

} else {

v = run_file(fp, filename, file_input, d, d);

}

flushline();

if (v == NULL) {

print_error();

return -1;

}

DECREF(v);

return 0;

}

int

run_command(command)

char *command;

{

object *m, *d, *v;

m = add_module("__main__");

if (m == NULL)

return -1;

d = getmoduledict(m);

v = run_string(command, file_input, d, d);

flushline();

if (v == NULL) {

print_error();

return -1;

}

DECREF(v);

return 0;

}

void

print_error()

{

object *exception, *v, *f;

err_get(&exception, &v);

if (exception == NULL) {

fprintf(stderr, "print_error called but no exception\n");

abort();

}

if (exception == SystemExit) {

if (v == NULL || v == None)

goaway(0);

if (is_intobject(v))

goaway((int)getintvalue(v));

else {

/* OK to use real stderr here */

printobject(v, stderr, PRINT_RAW);

fprintf(stderr, "\n");

goaway(1);

}

}

sysset("last_type", exception);

sysset("last_value", v);

f = sysget("stderr");

if (f == NULL)

fprintf(stderr, "lost sys.stderr\n");

else {

printtraceback(f);

if (exception == SyntaxError) {

object *message;

char *filename, *text;

int lineno, offset;

if (!getargs(v, "(O(ziiz))", &message,

&filename, &lineno, &offset, &text))

err_clear();

else {

char buf[10];

writestring(" File \"", f);

if (filename == NULL)

writestring("<string>", f);

else

writestring(filename, f);

writestring("\", line ", f);

sprintf(buf, "%d", lineno);

writestring(buf, f);

writestring("\n", f);

if (text != NULL) {

char *nl;

if (offset > 0 &&

offset == 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--;

}

writestring(" ", f);

writestring(text, f);

if (*text == '\0' ||

text[strlen(text)-1] != '\n')

writestring("\n", f);

writestring(" ", f);

offset--;

while (offset > 0) {

writestring(" ", f);

offset--;

}

writestring("^\n", f);

}

INCREF(message);

DECREF(v);

v = message;

}

}

if (writeobject(exception, f, PRINT_RAW) != 0)

err_clear();

if (v != NULL && v != None) {

writestring(": ", f);

if (writeobject(v, f, PRINT_RAW) != 0)

err_clear();

}

writestring("\n", f);

}

XDECREF(exception);

XDECREF(v);

}

object *

run_string(str, start, globals, locals)

char *str;

int start;

object *globals, *locals;

{

return run_err_node(parse_string(str, start),

"<string>", globals, locals);

}

object *

run_file(fp, filename, start, globals, locals)

FILE *fp;

char *filename;

int start;

object *globals, *locals;

{

return run_err_node(parse_file(fp, filename, start),

filename, globals, locals);

}

static object *

run_err_node(n, filename, globals, locals)

node *n;

char *filename;

object *globals, *locals;

{

if (n == NULL)

return NULL;

return run_node(n, filename, globals, locals);

}

static object *

run_node(n, filename, globals, locals)

node *n;

char *filename;

object *globals, *locals;

{

codeobject *co;

object *v;

co = compile(n, filename);

freetree(n);

if (co == NULL)

return NULL;

v = eval_code(co, globals, locals, (object *)NULL, (object *)NULL);

DECREF(co);

return v;

}

object *

run_pyc_file(fp, filename, globals, locals)

FILE *fp;

char *filename;

object *globals, *locals;

{

codeobject *co;

object *v;

long magic;

long get_pyc_magic();

magic = rd_long(fp);

if (magic != get_pyc_magic()) {

err_setstr(RuntimeError,

"Bad magic number in .pyc file");

return NULL;

}

(void) rd_long(fp);

v = rd_object(fp);

fclose(fp);

if (v == NULL || !is_codeobject(v)) {

XDECREF(v);

err_setstr(RuntimeError,

"Bad code object in .pyc file");

return NULL;

}

co = (codeobject *)v;

v = eval_code(co, globals, locals, (object *)NULL, (object *)NULL);

DECREF(co);

return v;

}

object *

compile_string(str, filename, start)

char *str;

char *filename;

int start;

{

node *n;

int err;

codeobject *co;

n = parse_string(str, start);

if (n == NULL)

return NULL;

co = compile(n, filename);

freetree(n);

return (object *)co;

}

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

node *

parse_file(fp, filename, start)

FILE *fp;

char *filename;

int start;

{

node *n;

perrdetail err;

BGN_SAVE

n = parsefile(fp, filename, &gram, start,

(char *)0, (char *)0, &err);

END_SAVE

if (n == NULL)

err_input(&err);

return n;

}

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

node *

parse_string(str, start)

char *str;

int start;

{

node *n;

perrdetail err;

n = parsestring(str, &gram, 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;

{

object *v, *w;

char *msg = NULL;

v = mkvalue("(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:

err_set(KeyboardInterrupt);

return;

case E_NOMEM:

err_nomem();

return;

case E_EOF:

msg = "unexpected EOF while parsing";

break;

default:

fprintf(stderr, "error=%d\n", err->error);

msg = "unknown parsing error";

break;

}

w = mkvalue("(sO)", msg, v);

XDECREF(v);

err_setval(SyntaxError, w);

XDECREF(w);

}

/* Print fatal error message and abort */

void

fatal(msg)

char *msg;

{

fprintf(stderr, "Fatal Python error: %s\n", msg);

abort();

}

/* Clean up and exit */

#ifdef WITH_THREAD

#include "thread.h"

int threads_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) PROTO((void));

{

if (nexitfuncs >= NEXITFUNCS)

return -1;

exitfuncs[nexitfuncs++] = func;

return 0;

}

void

cleanup()

{

object *exitfunc = sysget("exitfunc");

if (exitfunc) {

object *arg;

object *res;

sysset("exitfunc", (object *)NULL);

arg = newtupleobject(0);

if (arg == NULL)

res = NULL;

else {

res = call_object(exitfunc, arg);

DECREF(arg);

}

if (res == NULL) {

fprintf(stderr, "Error in sys.exitfunc:\n");

print_error();

}

}

flushline();

while (nexitfuncs > 0)

(*exitfuncs[--nexitfuncs])();

}

#ifdef COUNT_ALLOCS

extern void dump_counts PROTO((void));

#endif

void

goaway(sts)

int sts;

{

cleanup();

#ifdef COUNT_ALLOCS

dump_counts();

#endif

#ifdef WITH_THREAD

/* Other threads may still be active, so skip most of the

cleanup actions usually done (these are mostly for

debugging anyway). */

(void) save_thread();

#ifndef NO_EXIT_PROG

if (threads_started)

_exit_prog(sts);

else

exit_prog(sts);

#else /* !NO_EXIT_PROG */

if (threads_started)

_exit(sts);

else

exit(sts);

#endif /* !NO_EXIT_PROG */

#else /* WITH_THREAD */

doneimport();

err_clear();

#ifdef REF_DEBUG

fprintf(stderr, "[%ld refs]\n", ref_total);

#endif

#ifdef TRACE_REFS

if (askyesno("Print left references?")) {

printrefs(stderr);

}

#endif /* TRACE_REFS */

exit(sts);

#endif /* WITH_THREAD */

/*NOTREACHED*/

}

#ifdef HAVE_SIGNAL_H

static RETSIGTYPE

sighandler(sig)

int sig;

{

signal(sig, SIG_DFL); /* Don't catch recursive signals */

cleanup(); /* Do essential clean-up */

#ifdef HAVE_GETPID

kill(getpid(), sig); /* Pretend the signal killed us */

#else

exit(1);

#endif

/*NOTREACHED*/

}

#endif

static void

initsigs()

{

RETSIGTYPE (*t)();

#ifdef HAVE_SIGNAL_H

#ifdef SIGPIPE

signal(SIGPIPE, SIG_IGN);

#endif

#ifdef SIGHUP

t = signal(SIGHUP, SIG_IGN);

if (t == SIG_DFL)

signal(SIGHUP, sighandler);

else

signal(SIGHUP, t);

#endif

#ifdef SIGTERM

t = signal(SIGTERM, SIG_IGN);

if (t == SIG_DFL)

signal(SIGTERM, sighandler);

else

signal(SIGTERM, t);

#endif

#endif /* HAVE_SIGNAL_H */

initintr(); /* May imply initsignal() */

}

#ifdef TRACE_REFS

/* Ask a yes/no question */

int

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