window(1): Remove __RCSID & friends.
[dragonfly.git] / usr.bin / window / wwflush.c
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2c872e05 1/* @(#)wwflush.c 8.1 (Berkeley) 6/6/93 */
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2/* $NetBSD: wwflush.c,v 1.10 2006/12/18 20:04:55 christos Exp $ */
3
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4/*
5 * Copyright (c) 1983, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Edward Wang at The University of California, Berkeley.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
abecab39 19 * 3. Neither the name of the University nor the names of its contributors
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20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
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36#include <signal.h>
37#include <string.h>
abecab39 38#include <unistd.h>
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39#include "ww.h"
40#include "tt.h"
abecab39 41#include "xx.h"
984263bc 42
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43void
44wwflush(void)
984263bc 45{
abecab39 46 int row, col;
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47
48 if ((row = wwcursorrow) < 0)
49 row = 0;
50 else if (row >= wwnrow)
51 row = wwnrow - 1;
52 if ((col = wwcursorcol) < 0)
53 col = 0;
54 else if (col >= wwncol)
55 col = wwncol - 1;
56 xxmove(row, col);
57 if (wwdocheckpoint) {
58 xxflush(0);
59 wwcheckpoint();
60 } else
61 xxflush(1);
62}
63
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64void
65wwcheckpoint(void)
984263bc 66{
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67 sigset_t nsigset, osigset;
68
69 sigemptyset(&nsigset);
70 sigaddset(&nsigset, SIGALRM);
71 sigprocmask(SIG_BLOCK, &nsigset, &osigset);
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72
73 tt.tt_ack = 0;
74 do {
75 (*tt.tt_checkpoint)();
76#ifndef OLD_TTY
77 (void) tcdrain(1);
78#endif
79 (void) alarm(3);
80 for (wwdocheckpoint = 0; !wwdocheckpoint && tt.tt_ack == 0;)
abecab39 81 sigsuspend(&osigset);
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82 } while (tt.tt_ack == 0);
83 (void) alarm(0);
84 wwdocheckpoint = 0;
85 if (tt.tt_ack < 0) {
86 wwcopyscreen(wwcs, wwos);
87 (void) alarm(1);
88 wwreset();
89 wwupdate();
90 wwflush();
91 } else {
92 wwcopyscreen(wwos, wwcs);
93 (void) alarm(3);
94 }
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95
96 sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0);
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97}
98
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99void
100wwcopyscreen(union ww_char **s1, union ww_char **s2)
984263bc 101{
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102 int i;
103 int s = wwncol * sizeof **s1;
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104
105 for (i = wwnrow; --i >= 0;)
abecab39 106 memmove((char *) *s2++, (char *) *s1++, s);
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107}
108
109void
abecab39 110wwalarm(int dummy __unused)
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111{
112 wwdocheckpoint = 1;
113}