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pig.c revision 1.5 
      1 /*	$NetBSD: pig.c,v 1.5 1997/10/10 16:43:37 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. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 __COPYRIGHT("@(#) Copyright (c) 1992, 1993\n\
     39 	The Regents of the University of California.  All rights reserved.\n");
     40 #endif /* not lint */
     41 
     42 #ifndef lint
     43 #if 0
     44 static char sccsid[] = "@(#)pig.c	8.2 (Berkeley) 5/4/95";
     45 #else
     46 __RCSID("$NetBSD: pig.c,v 1.5 1997/10/10 16:43:37 lukem Exp $");
     47 #endif
     48 #endif /* not lint */
     49 
     50 #include <sys/types.h>
     51 
     52 #include <ctype.h>
     53 #include <stdio.h>
     54 #include <stdlib.h>
     55 #include <string.h>
     56 #include <unistd.h>
     57 
     58 int main __P((int, char *[]));
     59 void pigout __P((char *, int));
     60 void usage __P((void));
     61 
     62 int
     63 main(argc, argv)
     64 	int argc;
     65 	char *argv[];
     66 {
     67 	int len;
     68 	int ch;
     69 	char buf[1024];
     70 
     71 	while ((ch = getopt(argc, argv, "")) != -1)
     72 		switch(ch) {
     73 		case '?':
     74 		default:
     75 			usage();
     76 		}
     77 	argc -= optind;
     78 	argv += optind;
     79 
     80 	for (len = 0; (ch = getchar()) != EOF;) {
     81 		if (isalpha(ch)) {
     82 			if (len >= sizeof(buf)) {
     83 				(void)fprintf(stderr, "pig: ate too much!\n");
     84 				exit(1);
     85 			}
     86 			buf[len++] = ch;
     87 			continue;
     88 		}
     89 		if (len != 0) {
     90 			pigout(buf, len);
     91 			len = 0;
     92 		}
     93 		(void)putchar(ch);
     94 	}
     95 	exit(0);
     96 }
     97 
     98 void
     99 pigout(buf, len)
    100 	char *buf;
    101 	int len;
    102 {
    103 	int ch, start, i;
    104 	int olen, allupper, firstupper;
    105 
    106 	/* See if the word is all upper case */
    107 	allupper = firstupper = isupper(buf[0]);
    108 	for (i = 1; i < len && allupper; i++)
    109 		allupper = allupper && isupper(buf[i]);
    110 
    111 	/*
    112 	 * If the word starts with a vowel, append "way".  Don't treat 'y'
    113 	 * as a vowel if it appears first.
    114 	 */
    115 	if (index("aeiouAEIOU", buf[0]) != NULL) {
    116 		(void)printf("%.*s%s", len, buf,
    117 		    allupper ? "WAY" : "way");
    118 		return;
    119 	}
    120 
    121 	/*
    122 	 * Copy leading consonants to the end of the word.  The unit "qu"
    123 	 * isn't treated as a vowel.
    124 	 */
    125 	if (!allupper)
    126 		buf[0] = tolower(buf[0]);
    127 	for (start = 0, olen = len;
    128 	    !index("aeiouyAEIOUY", buf[start]) && start < olen;) {
    129 		ch = buf[len++] = buf[start++];
    130 		if ((ch == 'q' || ch == 'Q') && start < olen &&
    131 		    (buf[start] == 'u' || buf[start] == 'U'))
    132 			buf[len++] = buf[start++];
    133 	}
    134 	if (firstupper)
    135 		buf[start] = toupper(buf[start]);
    136 	(void)printf("%.*s%s", olen, buf + start, allupper ? "AY" : "ay");
    137 }
    138 
    139 void
    140 usage()
    141 {
    142 	(void)fprintf(stderr, "usage: pig\n");
    143 	exit(1);
    144 }
    145