mirror of https://github.com/python/cpython
459 lines
8.5 KiB
C
459 lines
8.5 KiB
C
/***********************************************************
|
|
Copyright 1991, 1992 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"
|
|
|
|
extern char *getpythonpath();
|
|
|
|
extern grammar gram; /* From graminit.c */
|
|
|
|
int debugging; /* Needed by parser.c */
|
|
int verbose; /* Needed by import.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();
|
|
|
|
initcalls(); /* Configuration-dependent initializations */
|
|
|
|
initintr(); /* For intrcheck() */
|
|
|
|
setpythonpath(getpythonpath());
|
|
}
|
|
|
|
/* 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;
|
|
char *ps1, *ps2;
|
|
int err;
|
|
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
|
|
err = parsefile(fp, filename, &gram, single_input, ps1, ps2, &n);
|
|
END_SAVE
|
|
XDECREF(v);
|
|
XDECREF(w);
|
|
if (err == E_EOF)
|
|
return E_EOF;
|
|
if (err != E_DONE) {
|
|
err_input(err);
|
|
print_error();
|
|
return err;
|
|
}
|
|
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;
|
|
m = add_module("__main__");
|
|
if (m == NULL)
|
|
return -1;
|
|
d = getmoduledict(m);
|
|
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;
|
|
err_get(&exception, &v);
|
|
if (exception == SystemExit) {
|
|
if (v == NULL || v == None)
|
|
goaway(0);
|
|
if (is_intobject(v))
|
|
goaway((int)getintvalue(v));
|
|
else {
|
|
printobject(v, stderr, PRINT_RAW);
|
|
fprintf(stderr, "\n");
|
|
goaway(1);
|
|
}
|
|
}
|
|
sysset("last_type", exception);
|
|
sysset("last_value", v);
|
|
if (printobject(exception, stderr, PRINT_RAW) != 0)
|
|
err_clear();
|
|
if (v != NULL && v != None) {
|
|
fprintf(stderr, ": ");
|
|
if (printobject(v, stderr, PRINT_RAW) != 0)
|
|
err_clear();
|
|
}
|
|
fprintf(stderr, "\n");
|
|
XDECREF(exception);
|
|
XDECREF(v);
|
|
printtraceback(stderr);
|
|
}
|
|
|
|
object *
|
|
run_string(str, start, globals, locals)
|
|
char *str;
|
|
int start;
|
|
/*dict*/object *globals, *locals;
|
|
{
|
|
node *n;
|
|
int err;
|
|
err = parse_string(str, start, &n);
|
|
return run_err_node(err, n, "<string>", globals, locals);
|
|
}
|
|
|
|
object *
|
|
run_file(fp, filename, start, globals, locals)
|
|
FILE *fp;
|
|
char *filename;
|
|
int start;
|
|
/*dict*/object *globals, *locals;
|
|
{
|
|
node *n;
|
|
int err;
|
|
err = parse_file(fp, filename, start, &n);
|
|
return run_err_node(err, n, filename, globals, locals);
|
|
}
|
|
|
|
object *
|
|
run_err_node(err, n, filename, globals, locals)
|
|
int err;
|
|
node *n;
|
|
char *filename;
|
|
/*dict*/object *globals, *locals;
|
|
{
|
|
if (err != E_DONE) {
|
|
err_input(err);
|
|
return NULL;
|
|
}
|
|
return run_node(n, filename, globals, locals);
|
|
}
|
|
|
|
object *
|
|
run_node(n, filename, globals, locals)
|
|
node *n;
|
|
char *filename;
|
|
/*dict*/object *globals, *locals;
|
|
{
|
|
if (globals == NULL) {
|
|
globals = getglobals();
|
|
if (locals == NULL)
|
|
locals = getlocals();
|
|
}
|
|
else {
|
|
if (locals == NULL)
|
|
locals = globals;
|
|
}
|
|
return eval_node(n, filename, globals, locals);
|
|
}
|
|
|
|
object *
|
|
eval_node(n, filename, globals, locals)
|
|
node *n;
|
|
char *filename;
|
|
object *globals;
|
|
object *locals;
|
|
{
|
|
codeobject *co;
|
|
object *v;
|
|
co = compile(n, filename);
|
|
freetree(n);
|
|
if (co == NULL)
|
|
return NULL;
|
|
v = eval_code(co, globals, locals, (object *)NULL);
|
|
DECREF(co);
|
|
return v;
|
|
}
|
|
|
|
/* Simplified interface to parsefile */
|
|
|
|
int
|
|
parse_file(fp, filename, start, n_ret)
|
|
FILE *fp;
|
|
char *filename;
|
|
int start;
|
|
node **n_ret;
|
|
{
|
|
int ret;
|
|
BGN_SAVE
|
|
ret = parsefile(fp, filename, &gram, start,
|
|
(char *)0, (char *)0, n_ret);
|
|
END_SAVE
|
|
return ret;
|
|
}
|
|
|
|
/* Simplified interface to parsestring */
|
|
|
|
int
|
|
parse_string(str, start, n_ret)
|
|
char *str;
|
|
int start;
|
|
node **n_ret;
|
|
{
|
|
int err = parsestring(str, &gram, start, n_ret);
|
|
/* Don't confuse early end of string with early end of input */
|
|
if (err == E_EOF)
|
|
err = E_SYNTAX;
|
|
return err;
|
|
}
|
|
|
|
/* Print fatal error message and abort */
|
|
|
|
void
|
|
fatal(msg)
|
|
char *msg;
|
|
{
|
|
fprintf(stderr, "Fatal error: %s\n", msg);
|
|
abort();
|
|
}
|
|
|
|
/* Clean up and exit */
|
|
|
|
#ifdef USE_THREAD
|
|
extern int threads_started;
|
|
#endif
|
|
|
|
void
|
|
goaway(sts)
|
|
int sts;
|
|
{
|
|
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();
|
|
|
|
#ifdef USE_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();
|
|
donecalls();
|
|
if (threads_started)
|
|
_exit_prog(sts);
|
|
else
|
|
exit_prog(sts);
|
|
|
|
#else /* USE_THREAD */
|
|
|
|
/* XXX Call doneimport() before donecalls(), since donecalls()
|
|
calls wdone(), and doneimport() may close windows */
|
|
doneimport();
|
|
donecalls();
|
|
|
|
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 /* USE_THREAD */
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
#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 applec /* MPW (also usable for Think C 3.0) */
|
|
|
|
/* 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
|