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pig.c revision 1.13 
      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
     40 static 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 
     55 int main(int, char *[]);
     56 void pigout(char *, int);
     57 void usage(void) __dead;
     58 
     59 int
     60 main(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 
     93 void
     94 pigout(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 
    134 void
    135 usage()
    136 {
    137 	(void)fprintf(stderr, "usage: pig\n");
    138 	exit(1);
    139 }
    140