source: trunk/ncurses/test/dots.c@ 2788

Last change on this file since 2788 was 2621, checked in by bird, 20 years ago

GNU ncurses 5.5
File size: 4.1 KB
Line 
1/****************************************************************************
2 * Copyright (c) 1999-2002,2004 Free Software Foundation, Inc. *
3 * *
4 * Permission is hereby granted, free of charge, to any person obtaining a *
5 * copy of this software and associated documentation files (the *
6 * "Software"), to deal in the Software without restriction, including *
7 * without limitation the rights to use, copy, modify, merge, publish, *
8 * distribute, distribute with modifications, sublicense, and/or sell *
9 * copies of the Software, and to permit persons to whom the Software is *
10 * furnished to do so, subject to the following conditions: *
11 * *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
14 * *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
22 * *
23 * Except as contained in this notice, the name(s) of the above copyright *
24 * holders shall not be used in advertising or otherwise to promote the *
25 * sale, use or other dealings in this Software without prior written *
26 * authorization. *
27 ****************************************************************************/
28
29/*
30 * Author: Thomas E. Dickey <dickey@clark.net> 1999
31 *
32 * $Id: dots.c,v 1.11 2005/05/28 21:38:45 tom Exp $
33 *
34 * A simple demo of the terminfo interface.
35 */
36#include <test.priv.h>
37
38#include <time.h>
39
40#define valid(s) ((s != 0) && s != (char *)-1)
41
42static bool interrupted = FALSE;
43
44static int
45outc(int c)
46{
47 if (interrupted) {
48 char tmp = c;
49 write(STDOUT_FILENO, &tmp, 1);
50 } else {
51 putc(c, stdout);
52 }
53 return 0;
54}
55
56static bool
57outs(char *s)
58{
59 if (valid(s)) {
60 tputs(s, 1, outc);
61 return TRUE;
62 }
63 return FALSE;
64}
65
66static void
67cleanup(void)
68{
69 outs(exit_attribute_mode);
70 if (!outs(orig_colors))
71 outs(orig_pair);
72 outs(clear_screen);
73 outs(cursor_normal);
74}
75
76static void
77onsig(int n GCC_UNUSED)
78{
79 interrupted = TRUE;
80 cleanup();
81 ExitProgram(EXIT_FAILURE);
82}
83
84static float
85ranf(void)
86{
87 long r = (rand() & 077777);
88 return ((float) r / 32768.);
89}
90
91int
92main(
93 int argc GCC_UNUSED,
94 char *argv[]GCC_UNUSED)
95{
96 int x, y, z, j, p;
97 float r;
98 float c;
99
100 for (j = SIGHUP; j <= SIGTERM; j++)
101 if (signal(j, SIG_IGN) != SIG_IGN)
102 signal(j, onsig);
103
104 srand((unsigned) time(0));
105 setupterm((char *) 0, 1, (int *) 0);
106 outs(clear_screen);
107 outs(cursor_invisible);
108 if (max_colors > 1) {
109 if (!valid(set_a_foreground)
110 || !valid(set_a_background)
111 || (!valid(orig_colors) && !valid(orig_pair)))
112 max_colors = -1;
113 }
114
115 r = (float) (lines - 4);
116 c = (float) (columns - 4);
117
118 for (;;) {
119 x = (int) (c * ranf()) + 2;
120 y = (int) (r * ranf()) + 2;
121 p = (ranf() > 0.9) ? '*' : ' ';
122
123 tputs(tparm3(cursor_address, y, x), 1, outc);
124 if (max_colors > 0) {
125 z = (int) (ranf() * max_colors);
126 if (ranf() > 0.01) {
127 tputs(tparm2(set_a_foreground, z), 1, outc);
128 } else {
129 tputs(tparm2(set_a_background, z), 1, outc);
130 napms(1);
131 }
132 } else if (valid(exit_attribute_mode)
133 && valid(enter_reverse_mode)) {
134 if (ranf() <= 0.01) {
135 outs((ranf() > 0.6)
136 ? enter_reverse_mode
137 : exit_attribute_mode);
138 napms(1);
139 }
140 }
141 outc(p);
142 fflush(stdout);
143 }
144}
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