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/*
* main.c logo main procedure module dvb
*
* Copyright (C) 1993 by the Regents of the University of California
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#ifdef WIN32
#include <windows.h>
#include <process.h> /* needed? */
#endif
#include "logo.h"
#include "globals.h"
#ifdef HAVE_TERMIO_H
#include <termio.h>
#else
#ifdef HAVE_SGTTY_H
#include <sgtty.h>
#endif
#endif
#ifdef __ZTC__
#include <signal.h>
#define SIGQUIT SIGTERM
#include <controlc.h>
#endif
#ifndef TIOCSTI
#include <setjmp.h>
jmp_buf iblk_buf;
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef mac
#include <console.h>
#endif
NODE *current_line = NIL;
NODE **bottom_stack; /*GC*/
void unblock_input(void) {
if (input_blocking) {
input_blocking = 0;
#ifdef mac
csetmode(C_ECHO, stdin);
fflush(stdin);
#endif
#ifdef TIOCSTI
ioctl(0,TIOCSTI,"\n");
#else
longjmp(iblk_buf,1);
#endif
}
}
#ifdef SIG_TAKES_ARG
#define sig_arg 0
RETSIGTYPE logo_stop(int sig)
#else
#define sig_arg
RETSIGTYPE logo_stop()
#endif
{
if (inside_gc) {
int_during_gc = 1;
} else {
to_pending = 0;
err_logo(STOP_ERROR,NIL);
signal(SIGINT, logo_stop);
unblock_input();
}
SIGRET
}
#ifdef SIG_TAKES_ARG
#define sig_arg 0
RETSIGTYPE logo_pause(int sig)
#else
#define sig_arg
RETSIGTYPE logo_pause()
#endif
{
if (inside_gc) {
int_during_gc = -1;
} else {
to_pending = 0;
#ifdef bsd
sigsetmask(0);
#else
#if !defined(mac) && !defined(_MSC_VER)
signal(SIGQUIT, logo_pause);
#endif
#endif
lpause(NIL);
}
SIGRET
}
#if defined(__ZTC__) && !defined(WIN32) /* sowings */
void _far _cdecl do_ctrl_c(void) {
ctrl_c_count++;
}
#endif
int main(int argc, char *argv[]) {
NODE *exec_list = NIL;
readstream = stdin;
loadstream = stdin;
writestream = stdout;
#ifdef mac
init_mac_memory();
#endif
bottom_stack = &exec_list; /*GC*/
#ifdef x_window
x_window_init(argc, argv);
#endif
(void)addseg();
term_init();
init();
math_init();
#ifdef ibm
signal(SIGINT, SIG_IGN);
#if defined(__ZTC__) && !defined(WIN32) /* sowings */
_controlc_handler = do_ctrl_c;
controlc_open();
#endif
#else /* !ibm */
signal(SIGINT, logo_stop);
#endif /* ibm */
#ifdef mac
signal(SIGQUIT, SIG_IGN);
#else /* !mac */
signal(SIGQUIT, logo_pause);
#endif
/* SIGQUITs never happen on the IBM */
if (argc < 2) {
#ifndef WIN32
if (isatty(1))
#endif
{
lcleartext(NIL);
ndprintf(stdout,"Welcome to Berkeley Logo version 4.6");
new_line(stdout);
}
}
argv++;
while (--argc > 0 && NOT_THROWING) {
silent_load(NIL,*argv++);
}
for (;;) {
if (NOT_THROWING) {
check_reserve_tank();
current_line = reader(stdin,"? ");
#ifdef __ZTC__
(void)feof(stdin);
if (!in_graphics_mode)
printf(" \b");
fflush(stdout);
#endif
#ifndef WIN32
if (feof(stdin) && !isatty(0)) lbye(NIL);
#endif
#ifdef __ZTC__
if (feof(stdin)) clearerr(stdin);
#endif
if (NOT_THROWING) {
exec_list = parser(current_line, TRUE);
val_status = 0;
if (exec_list != NIL) eval_driver(exec_list);
}
}
if (stopping_flag == THROWING) {
if (compare_node(throw_node, Error, TRUE) == 0) {
err_print();
} else if (compare_node(throw_node, System, TRUE) == 0)
break;
else if (compare_node(throw_node, Toplevel, TRUE) != 0) {
err_logo(NO_CATCH_TAG, throw_node);
err_print();
}
stopping_flag = RUN;
}
if (stopping_flag == STOP || stopping_flag == OUTPUT) {
print_node(stdout, make_static_strnode(
"You must be in a procedure to use OUTPUT or STOP.\n"));
stopping_flag = RUN;
}
}
prepare_to_exit(TRUE);
return 0;
}
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