1/*	$NetBSD: pig.c,v 1.14 2009/08/12 08:22:24 dholland 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 1.14 2009/08/12 08:22:24 dholland 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(int argc, char *argv[])
61{
62	int len;
63	int ch;
64	char buf[1024];
65
66	while ((ch = getopt(argc, argv, "")) != -1)
67		switch(ch) {
68		case '?':
69		default:
70			usage();
71		}
72	argc -= optind;
73	argv += optind;
74
75	for (len = 0; (ch = getchar()) != EOF;) {
76		if (isalpha(ch)) {
77			if ((size_t)len >= sizeof(buf))
78				errx(1, "ate too much!");
79			buf[len++] = ch;
80			continue;
81		}
82		if (len != 0) {
83			pigout(buf, len);
84			len = 0;
85		}
86		(void)putchar(ch);
87	}
88	exit(0);
89}
90
91static void
92pigout(char *buf, int len)
93{
94	int ch, start, i;
95	int olen, allupper, firstupper;
96
97	/* See if the word is all upper case */
98	allupper = firstupper = isupper((unsigned char)buf[0]);
99	for (i = 1; i < len && allupper; i++)
100		allupper = allupper && isupper((unsigned char)buf[i]);
101
102	/*
103	 * If the word starts with a vowel, append "way".  Don't treat 'y'
104	 * as a vowel if it appears first.
105	 */
106	if (strchr("aeiouAEIOU", buf[0]) != NULL) {
107		(void)printf("%.*s%s", len, buf,
108		    allupper ? "WAY" : "way");
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	if (!allupper)
117		buf[0] = tolower((unsigned char)buf[0]);
118	for (start = 0, olen = len;
119	    !strchr("aeiouyAEIOUY", buf[start]) && start < olen;) {
120		ch = buf[len++] = buf[start++];
121		if ((ch == 'q' || ch == 'Q') && start < olen &&
122		    (buf[start] == 'u' || buf[start] == 'U'))
123			buf[len++] = buf[start++];
124	}
125	if (firstupper)
126		buf[start] = toupper((unsigned char)buf[start]);
127	(void)printf("%.*s%s", olen, buf + start, allupper ? "AY" : "ay");
128}
129
130static void
131usage(void)
132{
133	(void)fprintf(stderr, "usage: pig\n");
134	exit(1);
135}
136