122 lines
3.2 KiB
C
122 lines
3.2 KiB
C
/* $NetBSD: wwflush.c,v 1.9 2003/08/07 11:17:39 agc Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1983, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Edward Wang at The University of California, Berkeley.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)wwflush.c 8.1 (Berkeley) 6/6/93";
|
|
#else
|
|
__RCSID("$NetBSD: wwflush.c,v 1.9 2003/08/07 11:17:39 agc Exp $");
|
|
#endif
|
|
#endif /* not lint */
|
|
|
|
#include <signal.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include "ww.h"
|
|
#include "tt.h"
|
|
#include "xx.h"
|
|
|
|
void
|
|
wwflush(void)
|
|
{
|
|
int row, col;
|
|
|
|
if ((row = wwcursorrow) < 0)
|
|
row = 0;
|
|
else if (row >= wwnrow)
|
|
row = wwnrow - 1;
|
|
if ((col = wwcursorcol) < 0)
|
|
col = 0;
|
|
else if (col >= wwncol)
|
|
col = wwncol - 1;
|
|
xxmove(row, col);
|
|
if (wwdocheckpoint) {
|
|
xxflush(0);
|
|
wwcheckpoint();
|
|
} else
|
|
xxflush(1);
|
|
}
|
|
|
|
void
|
|
wwcheckpoint(void)
|
|
{
|
|
sigset_t nsigset, osigset;
|
|
|
|
sigemptyset(&nsigset);
|
|
sigaddset(&nsigset, SIGALRM);
|
|
sigprocmask(SIG_BLOCK, &nsigset, &osigset);
|
|
|
|
tt.tt_ack = 0;
|
|
do {
|
|
(*tt.tt_checkpoint)();
|
|
#ifndef OLD_TTY
|
|
(void) tcdrain(1);
|
|
#endif
|
|
(void) alarm(3);
|
|
for (wwdocheckpoint = 0; !wwdocheckpoint && tt.tt_ack == 0;)
|
|
sigsuspend(&osigset);
|
|
} while (tt.tt_ack == 0);
|
|
(void) alarm(0);
|
|
wwdocheckpoint = 0;
|
|
if (tt.tt_ack < 0) {
|
|
wwcopyscreen(wwcs, wwos);
|
|
(void) alarm(1);
|
|
wwreset();
|
|
wwupdate();
|
|
wwflush();
|
|
} else {
|
|
wwcopyscreen(wwos, wwcs);
|
|
(void) alarm(3);
|
|
}
|
|
|
|
sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0);
|
|
}
|
|
|
|
void
|
|
wwcopyscreen(union ww_char **s1, union ww_char **s2)
|
|
{
|
|
int i;
|
|
int s = wwncol * sizeof **s1;
|
|
|
|
for (i = wwnrow; --i >= 0;)
|
|
memmove((char *) *s2++, (char *) *s1++, s);
|
|
}
|
|
|
|
void
|
|
wwalarm(int dummy)
|
|
{
|
|
wwdocheckpoint = 1;
|
|
}
|