CISS quirk.
[dragonfly.git] / games / pig / pig.c
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1/*-
2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
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32 *
33 * @(#) Copyright (c) 1992, 1993 The Regents of the University of California. All rights reserved.
34 * @(#)pig.c 8.2 (Berkeley) 5/4/95
35 * $FreeBSD: src/games/pig/pig.c,v 1.7 1999/11/30 03:49:08 billf Exp $
851dc90d 36 * $DragonFly: src/games/pig/pig.c,v 1.3 2003/11/12 14:53:53 eirikn Exp $
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37 */
38
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39#include <sys/types.h>
40
41#include <ctype.h>
42#include <stdio.h>
43#include <stdlib.h>
44#include <string.h>
45#include <unistd.h>
46
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47void pigout (char *, int);
48void usage (void);
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49
50int
51main(argc, argv)
52 int argc;
53 char *argv[];
54{
55 int len;
56 int ch;
57 char buf[1024];
58
59 while ((ch = getopt(argc, argv, "")) != -1)
60 switch(ch) {
61 case '?':
62 default:
63 usage();
64 }
65 argc -= optind;
66 argv += optind;
67
68 for (len = 0; (ch = getchar()) != EOF;) {
69 if (isalpha(ch)) {
70 if (len >= sizeof(buf)) {
71 (void)fprintf(stderr, "pig: ate too much!\n");
72 exit(1);
73 }
74 buf[len++] = ch;
75 continue;
76 }
77 if (len != 0) {
78 pigout(buf, len);
79 len = 0;
80 }
81 (void)putchar(ch);
82 }
83 exit(0);
84}
85
86void
87pigout(buf, len)
88 char *buf;
89 int len;
90{
91 int ch, start;
92 int olen;
93
94 /*
95 * If the word starts with a vowel, append "way". Don't treat 'y'
96 * as a vowel if it appears first.
97 */
98 if (index("aeiouAEIOU", buf[0]) != NULL) {
99 (void)printf("%.*sway", len, buf);
100 return;
101 }
102
103 /*
104 * Copy leading consonants to the end of the word. The unit "qu"
105 * isn't treated as a vowel.
106 */
107 for (start = 0, olen = len;
108 !index("aeiouyAEIOUY", buf[start]) && start < olen;) {
109 ch = buf[len++] = buf[start++];
110 if ((ch == 'q' || ch == 'Q') && start < olen &&
111 (buf[start] == 'u' || buf[start] == 'U'))
112 buf[len++] = buf[start++];
113 }
114 (void)printf("%.*say", olen, buf + start);
115}
116
117void
118usage()
119{
120 (void)fprintf(stderr, "usage: pig\n");
121 exit(1);
122}