231 lines
4.2 KiB
C
231 lines
4.2 KiB
C
/***********************************************************
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Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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The Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior permission.
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STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/* Check for interrupts */
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#ifdef THINK_C
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#include <MacHeaders>
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#define macintosh
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#endif
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "myproto.h"
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#include "intrcheck.h"
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#ifdef QUICKWIN
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#include <io.h>
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void
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initintr()
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{
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}
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int
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intrcheck()
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{
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_wyield();
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}
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#define OK
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#endif /* QUICKWIN */
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#ifdef _M_IX86
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#include <io.h>
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#endif
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#if defined(MSDOS) && !defined(QUICKWIN)
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#ifdef __GNUC__
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/* This is for DJGPP's GO32 extender. I don't know how to trap
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* control-C (There's no API for ctrl-C, and I don't want to mess with
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* the interrupt vectors.) However, this DOES catch control-break.
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* --Amrit
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*/
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#include <go32.h>
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void
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initintr()
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{
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_go32_want_ctrl_break(1 /* TRUE */);
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}
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int
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intrcheck()
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{
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return _go32_was_ctrl_break_hit();
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}
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#else /* !__GNUC__ */
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/* This might work for MS-DOS (untested though): */
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void
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initintr()
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{
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}
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int
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intrcheck()
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{
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int interrupted = 0;
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while (kbhit()) {
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if (getch() == '\003')
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interrupted = 1;
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}
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return interrupted;
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}
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#endif /* __GNUC__ */
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#define OK
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#endif /* MSDOS && !QUICKWIN */
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#ifdef macintosh
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#ifdef applec /* MPW */
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#include <OSEvents.h>
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#include <SysEqu.h>
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#endif /* applec */
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#include <signal.h>
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static int interrupted;
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static RETSIGTYPE intcatcher PROTO((int));
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static RETSIGTYPE
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intcatcher(sig)
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int sig;
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{
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interrupted = 1;
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signal(SIGINT, intcatcher);
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}
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void
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initintr()
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{
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if (signal(SIGINT, SIG_IGN) != SIG_IGN)
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signal(SIGINT, intcatcher);
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}
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int
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intrcheck()
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{
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register EvQElPtr q;
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q = (EvQElPtr) GetEvQHdr()->qHead;
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for (; q; q = (EvQElPtr)q->qLink) {
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if (q->evtQWhat == keyDown &&
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(char)q->evtQMessage == '.' &&
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(q->evtQModifiers & cmdKey) != 0) {
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FlushEvents(keyDownMask, 0);
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interrupted = 1;
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break;
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}
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}
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if (interrupted) {
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interrupted = 0;
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return 1;
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}
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return 0;
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}
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#define OK
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#endif /* macintosh */
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#ifndef OK
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/* Default version -- for real operating systems and for Standard C */
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#include <stdio.h>
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#include <string.h>
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#include <signal.h>
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int interrupted;
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/* ARGSUSED */
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static RETSIGTYPE
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#ifdef _M_IX86
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intcatcher(int sig) /* So the C compiler shuts up */
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#else /* _M_IX86 */
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intcatcher(sig)
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int sig; /* Not used by required by interface */
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#endif /* _M_IX86 */
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{
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extern void goaway PROTO((int));
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static char message[] =
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"python: to interrupt a truly hanging Python program, interrupt once more.\n";
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switch (interrupted++) {
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case 0:
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break;
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case 1:
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write(2, message, strlen(message));
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break;
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case 2:
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interrupted = 0;
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goaway(1);
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break;
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}
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signal(SIGINT, intcatcher);
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}
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void
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initintr()
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{
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if (signal(SIGINT, SIG_IGN) != SIG_IGN)
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signal(SIGINT, intcatcher);
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#ifdef HAVE_SIGINTERRUPT
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/* This is for SunOS and other modern BSD derivatives.
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It means that system calls (like read()) are not restarted
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after an interrupt. This is necessary so interrupting a
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read() or readline() call works as expected.
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XXX On old BSD (pure 4.2 or older) you may have to do this
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differently! */
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siginterrupt(SIGINT, 1);
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#endif /* HAVE_SIGINTERRUPT */
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}
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int
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intrcheck()
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{
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if (!interrupted)
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return 0;
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interrupted = 0;
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return 1;
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}
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#endif /* !OK */
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