pig/pig.c

   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 }