1/*	$OpenBSD: tputs.c,v 1.2 2015/11/15 07:12:50 deraadt Exp $	*/
2/*	$NetBSD: tputs.c,v 1.5 1995/06/06 08:14:37 pk Exp $	*/
3
4/*
5 * Copyright (c) 1980, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#include <ctype.h>
34#include <curses.h>
35#undef ospeed
36
37/*
38 * The following array gives the number of tens of milliseconds per
39 * character for each speed as returned by gtty.  Thus since 300
40 * baud returns a 7, there are 33.3 milliseconds per char at 300 baud.
41 */
42static
43short	tmspc10[] = {
44	0, 2000, 1333, 909, 743, 666, 500, 333, 166, 83, 55, 41, 20, 10, 5
45};
46
47short	ospeed;
48char	PC;
49
50/*
51 * Put the character string cp out, with padding.
52 * The number of affected lines is affcnt, and the routine
53 * used to output one character is outc.
54 */
55void
56tputs(char *cp, int affcnt, void (*outc)(int))
57{
58	int i = 0, mspc10;
59
60	if (cp == 0)
61		return;
62
63	/*
64	 * Convert the number representing the delay.
65	 */
66	if (isdigit(*cp)) {
67		do {
68			i = i * 10 + *cp++ - '0';
69		} while (isdigit(*cp));
70	}
71	i *= 10;
72	if (*cp == '.') {
73		cp++;
74		if (isdigit(*cp))
75			i += *cp - '0';
76		/*
77		 * Only one digit to the right of the decimal point.
78		 */
79		while (isdigit(*cp))
80			cp++;
81	}
82
83	/*
84	 * If the delay is followed by a `*', then
85	 * multiply by the affected lines count.
86	 */
87	if (*cp == '*')
88		cp++, i *= affcnt;
89
90	/*
91	 * The guts of the string.
92	 */
93	while (*cp)
94		(*outc)(*cp++);
95
96	/*
97	 * If no delay needed, or output speed is
98	 * not comprehensible, then don't try to delay.
99	 */
100	if (i == 0)
101		return;
102	if (ospeed <= 0 || ospeed >= (sizeof tmspc10 / sizeof tmspc10[0]))
103		return;
104
105	/*
106	 * Round up by a half a character frame,
107	 * and then do the delay.
108	 * Too bad there are no user program accessible programmed delays.
109	 * Transmitting pad characters slows many
110	 * terminals down and also loads the system.
111	 */
112	mspc10 = tmspc10[ospeed];
113	i += mspc10 / 2;
114	for (i /= mspc10; i > 0; i--)
115		(*outc)(PC);
116}
117