Add __attribute__((__noreturn__)) to various function prototypes in games/.
[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.
6693db17 13 * 3. Neither the name of the University nor the names of its contributors
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14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
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28 *
29 * @(#) Copyright (c) 1992, 1993 The Regents of the University of California. All rights reserved.
30 * @(#)pig.c 8.2 (Berkeley) 5/4/95
31 * $FreeBSD: src/games/pig/pig.c,v 1.7 1999/11/30 03:49:08 billf Exp $
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32 */
33
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34#include <sys/types.h>
35
36#include <ctype.h>
37#include <stdio.h>
38#include <stdlib.h>
39#include <string.h>
40#include <unistd.h>
41
719497f4 42static void pigout(char *, int);
09ac707a 43static void usage(void) __dead2;
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44
45int
e1acdbad 46main(int argc, char **argv)
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47{
48 int len;
49 int ch;
50 char buf[1024];
51
52 while ((ch = getopt(argc, argv, "")) != -1)
53 switch(ch) {
54 case '?':
55 default:
56 usage();
57 }
58 argc -= optind;
59 argv += optind;
60
61 for (len = 0; (ch = getchar()) != EOF;) {
62 if (isalpha(ch)) {
e1acdbad 63 if (len >= (int)sizeof(buf)) {
d9f85b33 64 fprintf(stderr, "pig: ate too much!\n");
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65 exit(1);
66 }
67 buf[len++] = ch;
68 continue;
69 }
70 if (len != 0) {
71 pigout(buf, len);
72 len = 0;
73 }
d9f85b33 74 putchar(ch);
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75 }
76 exit(0);
77}
78
719497f4 79static void
e1acdbad 80pigout(char *buf, int len)
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81{
82 int ch, start;
83 int olen;
84
85 /*
86 * If the word starts with a vowel, append "way". Don't treat 'y'
87 * as a vowel if it appears first.
88 */
89 if (index("aeiouAEIOU", buf[0]) != NULL) {
d9f85b33 90 printf("%.*sway", len, buf);
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91 return;
92 }
93
94 /*
95 * Copy leading consonants to the end of the word. The unit "qu"
96 * isn't treated as a vowel.
97 */
98 for (start = 0, olen = len;
e0b1d537 99 start < olen && !index("aeiouyAEIOUY", buf[start]);) {
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100 ch = buf[len++] = buf[start++];
101 if ((ch == 'q' || ch == 'Q') && start < olen &&
102 (buf[start] == 'u' || buf[start] == 'U'))
103 buf[len++] = buf[start++];
104 }
d9f85b33 105 printf("%.*say", olen, buf + start);
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106}
107
719497f4 108static void
e1acdbad 109usage(void)
984263bc 110{
d9f85b33 111 fprintf(stderr, "usage: pig\n");
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112 exit(1);
113}