1/*	$NetBSD: pig.c,v 1.13 2008/07/20 01:03:21 lukem Exp $	*/
2
3/*-
4 * Copyright (c) 1992, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#ifndef lint
34__COPYRIGHT("@(#) Copyright (c) 1992, 1993\
35 The Regents of the University of California.  All rights reserved.");
36#endif /* not lint */
37
38#ifndef lint
39#if 0
40static char sccsid[] = "@(#)pig.c	8.2 (Berkeley) 5/4/95";
41#else
42__RCSID("$NetBSD: pig.c,v 1.13 2008/07/20 01:03:21 lukem Exp $");
43#endif
44#endif /* not lint */
45
46#include <sys/types.h>
47
48#include <ctype.h>
49#include <err.h>
50#include <stdio.h>
51#include <stdlib.h>
52#include <string.h>
53#include <unistd.h>
54
55int main(int, char *[]);
56static void pigout(char *, int);
57static void usage(void) __dead;
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 ((size_t)len >= sizeof(buf))
80				errx(1, "ate too much!");
81			buf[len++] = ch;
82			continue;
83		}
84		if (len != 0) {
85			pigout(buf, len);
86			len = 0;
87		}
88		(void)putchar(ch);
89	}
90	exit(0);
91}
92
93static void
94pigout(buf, len)
95	char *buf;
96	int len;
97{
98	int ch, start, i;
99	int olen, allupper, firstupper;
100
101	/* See if the word is all upper case */
102	allupper = firstupper = isupper((unsigned char)buf[0]);
103	for (i = 1; i < len && allupper; i++)
104		allupper = allupper && isupper((unsigned char)buf[i]);
105
106	/*
107	 * If the word starts with a vowel, append "way".  Don't treat 'y'
108	 * as a vowel if it appears first.
109	 */
110	if (strchr("aeiouAEIOU", buf[0]) != NULL) {
111		(void)printf("%.*s%s", len, buf,
112		    allupper ? "WAY" : "way");
113		return;
114	}
115
116	/*
117	 * Copy leading consonants to the end of the word.  The unit "qu"
118	 * isn't treated as a vowel.
119	 */
120	if (!allupper)
121		buf[0] = tolower((unsigned char)buf[0]);
122	for (start = 0, olen = len;
123	    !strchr("aeiouyAEIOUY", buf[start]) && start < olen;) {
124		ch = buf[len++] = buf[start++];
125		if ((ch == 'q' || ch == 'Q') && start < olen &&
126		    (buf[start] == 'u' || buf[start] == 'U'))
127			buf[len++] = buf[start++];
128	}
129	if (firstupper)
130		buf[start] = toupper((unsigned char)buf[start]);
131	(void)printf("%.*s%s", olen, buf + start, allupper ? "AY" : "ay");
132}
133
134static void
135usage()
136{
137	(void)fprintf(stderr, "usage: pig\n");
138	exit(1);
139}
140