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pig.c revision 1.3 
      1 /*	$NetBSD: pig.c,v 1.3 1996/06/07 19:30:50 cgd 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 #ifndef lint
     37 static char copyright[] =
     38 "@(#) 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	8.1 (Berkeley) 5/31/93";
     45 #else
     46 static char rcsid[] = "$NetBSD: pig.c,v 1.3 1996/06/07 19:30:50 cgd 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 
     57 void pigout __P((char *, int));
     58 void usage __P((void));
     59 
     60 int
     61 main(argc, argv)
     62 	int argc;
     63 	char *argv[];
     64 {
     65 	register int len;
     66 	int ch;
     67 	char buf[1024];
     68 
     69 	while ((ch = getopt(argc, argv, "")) != EOF)
     70 		switch(ch) {
     71 		case '?':
     72 		default:
     73 			usage();
     74 		}
     75 	argc -= optind;
     76 	argv += optind;
     77 
     78 	for (len = 0; (ch = getchar()) != EOF;) {
     79 		if (isalpha(ch)) {
     80 			if (len >= sizeof(buf)) {
     81 				(void)fprintf(stderr, "pig: ate too much!\n");
     82 				exit(1);
     83 			}
     84 			buf[len++] = ch;
     85 			continue;
     86 		}
     87 		if (len != 0) {
     88 			pigout(buf, len);
     89 			len = 0;
     90 		}
     91 		(void)putchar(ch);
     92 	}
     93 	exit(0);
     94 }
     95 
     96 void
     97 pigout(buf, len)
     98 	char *buf;
     99 	int len;
    100 {
    101 	register int ch, start, i;
    102 	int olen, allupper, firstupper;
    103 
    104 	/* See if the word is all upper case */
    105 	allupper = firstupper = isupper(buf[0]);
    106 	for (i = 1; i < len && allupper; i++)
    107 		allupper = allupper && isupper(buf[i]);
    108 
    109 	/*
    110 	 * If the word starts with a vowel, append "way".  Don't treat 'y'
    111 	 * as a vowel if it appears first.
    112 	 */
    113 	if (index("aeiouAEIOU", buf[0]) != NULL) {
    114 		(void)printf("%.*s%s", len, buf,
    115 		    allupper ? "WAY" : "way");
    116 		return;
    117 	}
    118 
    119 	/*
    120 	 * Copy leading consonants to the end of the word.  The unit "qu"
    121 	 * isn't treated as a vowel.
    122 	 */
    123 	if (!allupper)
    124 		buf[0] = tolower(buf[0]);
    125 	for (start = 0, olen = len;
    126 	    !index("aeiouyAEIOUY", buf[start]) && start < olen;) {
    127 		ch = buf[len++] = buf[start++];
    128 		if ((ch == 'q' || ch == 'Q') && start < olen &&
    129 		    (buf[start] == 'u' || buf[start] == 'U'))
    130 			buf[len++] = buf[start++];
    131 	}
    132 	if (firstupper)
    133 		buf[start] = toupper(buf[start]);
    134 	(void)printf("%.*s%s", olen, buf + start, allupper ? "AY" : "ay");
    135 }
    136 
    137 void
    138 usage()
    139 {
    140 	(void)fprintf(stderr, "usage: pig\n");
    141 	exit(1);
    142 }
    143