Initial import from FreeBSD RELENG_4:
[dragonfly.git] / games / pig / pig.c
CommitLineData
984263bc
MD
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.
32 */
33
34#ifndef lint
35static const char copyright[] =
36"@(#) Copyright (c) 1992, 1993\n\
37 The Regents of the University of California. All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41#if 0
42static char sccsid[] = "@(#)pig.c 8.2 (Berkeley) 5/4/95";
43#endif
44static const char rcsid[] =
45 "$FreeBSD: src/games/pig/pig.c,v 1.7 1999/11/30 03:49:08 billf Exp $";
46#endif /* not lint */
47
48#include <sys/types.h>
49
50#include <ctype.h>
51#include <stdio.h>
52#include <stdlib.h>
53#include <string.h>
54#include <unistd.h>
55
56void pigout __P((char *, int));
57void usage __P((void));
58
59int
60main(argc, argv)
61 int argc;
62 char *argv[];
63{
64 int len;
65 int ch;
66 char buf[1024];
67
68 while ((ch = getopt(argc, argv, "")) != -1)
69 switch(ch) {
70 case '?':
71 default:
72 usage();
73 }
74 argc -= optind;
75 argv += optind;
76
77 for (len = 0; (ch = getchar()) != EOF;) {
78 if (isalpha(ch)) {
79 if (len >= sizeof(buf)) {
80 (void)fprintf(stderr, "pig: ate too much!\n");
81 exit(1);
82 }
83 buf[len++] = ch;
84 continue;
85 }
86 if (len != 0) {
87 pigout(buf, len);
88 len = 0;
89 }
90 (void)putchar(ch);
91 }
92 exit(0);
93}
94
95void
96pigout(buf, len)
97 char *buf;
98 int len;
99{
100 int ch, start;
101 int olen;
102
103 /*
104 * If the word starts with a vowel, append "way". Don't treat 'y'
105 * as a vowel if it appears first.
106 */
107 if (index("aeiouAEIOU", buf[0]) != NULL) {
108 (void)printf("%.*sway", len, buf);
109 return;
110 }
111
112 /*
113 * Copy leading consonants to the end of the word. The unit "qu"
114 * isn't treated as a vowel.
115 */
116 for (start = 0, olen = len;
117 !index("aeiouyAEIOUY", buf[start]) && start < olen;) {
118 ch = buf[len++] = buf[start++];
119 if ((ch == 'q' || ch == 'Q') && start < olen &&
120 (buf[start] == 'u' || buf[start] == 'U'))
121 buf[len++] = buf[start++];
122 }
123 (void)printf("%.*say", olen, buf + start);
124}
125
126void
127usage()
128{
129 (void)fprintf(stderr, "usage: pig\n");
130 exit(1);
131}