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/* Python interpreter main program */
/* XXX This is still a mess */
#ifdef THINK_C
#define USE_STDWIN
#endif
#include <stdio.h>
#include <ctype.h>
#include "string.h"
#ifdef USE_STDWIN
#include "stdwin.h"
int use_stdwin;
#endif
extern char *getenv();
#include "PROTO.h"
#include "grammar.h"
#include "node.h"
#include "parsetok.h"
#include "graminit.h"
#include "errcode.h"
#include "object.h"
#include "stringobject.h"
#include "sysmodule.h"
extern grammar gram; /* From graminit.c */
#ifndef PYTHONPATH
#ifdef THINK_C
#define PYTHONPATH ": :mod"
#else /* !THINK_C */
#ifdef AMOEBA
#define PYTHONPATH ".:/profile/module/python"
#else /* !AMOEBA */
#define PYTHONPATH ".:/usr/local/lib/python"
#endif /* !AMOEBA */
#endif /* !THINK_C */
#endif /* !PYTHONPATH */
int debugging;
main(argc, argv)
int argc;
char **argv;
{
char *path;
char *filename = NULL;
FILE *fp = stdin;
int ret;
#ifdef USE_STDWIN
#ifdef THINK_C
wsetstdio(1);
#else THINK_C
/* Must use "python -s" now to get stdwin support */
if (argc > 1 && strcmp(argv[1], "-s") == 0)
argv[1] = argv[0],
argc--, argv++,
#endif /* !THINK_C */
use_stdwin = 1;
if (use_stdwin)
winitargs(&argc, &argv);
#endif /* USE_STDWIN */
#ifdef THINK_C_not_today
printf("argc = %d, argv[0] = '%s'\n", argc, argv[0]);
if (argc <= 1)
askargs(&argc, &argv);
#endif
initintr(); /* For intrcheck() */
if (argc > 1 && strcmp(argv[1], "-") != 0)
filename = argv[1];
if (filename != NULL) {
if ((fp = fopen(filename, "r")) == NULL) {
fprintf(stderr, "python: can't open file '%s'\n",
filename);
exit(2);
}
}
/* XXX what is the ideal initialization order? */
initsys(argc-1, argv+1);
inittime();
initmath();
#ifndef THINK_C
path = getenv("PYTHONPATH");
if (path == NULL)
#endif
path = PYTHONPATH;
setpythonpath(path);
initrun();
#ifdef USE_POSIX
initposix();
#endif
#ifdef THINK_C
initmac();
#endif
#ifdef USE_AUDIO
initaudio();
#endif
#ifdef USE_AMOEBA
initamoeba();
#endif
#ifdef USE_STDWIN
if (use_stdwin)
initstdwin();
#endif
#ifdef USE_GL
initgl();
#endif
#ifdef USE_PANEL
initpanel();
#endif
if (!isatty(fileno(fp))) {
ret = runfile(fp, file_input, (char *)NULL, (char *)NULL);
}
else {
sysset("ps1", newstringobject(">>> "));
sysset("ps2", newstringobject("... "));
for (;;) {
object *v = sysget("ps1"), *w = sysget("ps2");
char *ps1 = NULL, *ps2 = NULL;
if (v != NULL && is_stringobject(v)) {
INCREF(v);
ps1 = getstringvalue(v);
}
else
v = NULL;
if (w != NULL && is_stringobject(w)) {
INCREF(w);
ps2 = getstringvalue(w);
}
else
w = NULL;
ret = runfile(fp, single_input, ps1, ps2);
if (v != NULL)
DECREF(v);
if (w != NULL)
DECREF(w);
if (ret == E_EOF || ret == E_NOMEM)
break;
}
}
goaway(ret == E_DONE || ret == E_EOF ? 0 : 1);
/*NOTREACHED*/
}
goaway(sts)
int sts;
{
closerun();
#ifdef USE_STDWIN
if (use_stdwin)
wdone();
#endif
#ifdef THINK_C
#ifndef TRACE_REFS
/* Avoid 'click mouse to continue' in Lightspeed C */
if (sts == 0)
Click_On(0);
#endif
#endif
exit(sts);
/*NOTREACHED*/
}
/* Parse input from a file and execute it */
static int
runfile(fp, start, ps1, ps2)
FILE *fp;
int start;
char *ps1, *ps2;
{
node *n;
int ret;
ret = parsefile(fp, &gram, start, ps1, ps2, &n);
if (ret != E_DONE)
return ret;
return execute(n) == 0 ? E_DONE : E_ERROR;
}
#ifdef THINK_C
/* 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';
}
/* 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);
}
/* Kludge to get arguments on the Mac */
#define MAXARGS 20
static char *
nextarg(pnext)
char **pnext;
{
char *ret;
char *p = *pnext;
while (isspace(*p))
p++;
if (*p == '\0')
return NULL;
ret = p;
while (!isspace(*p))
p++;
if (*p != '\0')
*p++ = '\0';
*pnext = p;
return ret;
}
static
askargs(pargc, pargv)
int *pargc;
char ***pargv; /* sic */
{
static char buf[256];
static char *argv[MAXARGS];
int argc;
char *p, *next;
fprintf(stderr, "Args: ");
if (fgets(buf, sizeof buf, stdin) == NULL)
return;
next = buf;
if ((p = nextarg(&next)) == NULL)
return;
if (*pargc > 0)
argv[0] = (*pargv)[0];
else
argv[0] = "PYTHON";
argc = 1;
argv[argc++] = p;
while (argc+1 < MAXARGS && (p = nextarg(&next)) != NULL)
argv[argc++] = p;
argv[argc] = NULL;
*pargc = argc;
*pargv = argv;
}
#endif
/* WISH LIST
- improved per-module error handling; different use of errno
- possible new types:
- iterator (for range, keys, ...)
- improve interpreter error handling, e.g., true tracebacks
- release parse trees when no longer needed (make them objects?)
- faster parser (for long modules)
- save precompiled modules on file?
- fork threads, locking
- allow syntax extensions
*/
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