pig/pig.c

   1 /*-
   2  * Copyright (c) 1992, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifndef lint
  35 static char copyright[] =
  36 "@(#) Copyright (c) 1992, 1993\n\
  37         The Regents of the University of California.  All rights reserved.\n";
  38 #endif /* not lint */
  39
  40 #ifndef lint
  41 static char sccsid[] = "@(#)pig.c       8.1 (Berkeley) 5/31/93";
  42 #endif /* not lint */
  43
  44 #include <sys/types.h>
  45
  46 #include <ctype.h>
  47 #include <stdio.h>
  48 #include <stdlib.h>
  49 #include <string.h>
  50
  51 void pigout __P((char *, int));
  52 void usage __P((void));
  53
  54 int
  55 main(argc, argv)
  56         int argc;
  57         char *argv[];
  58 {
  59         register int len;
  60         int ch;
  61         char buf[1024];
  62
  63         while ((ch = getopt(argc, argv, "")) != EOF)
  64                 switch(ch) {
  65                 case '?':
  66                 default:
  67                         usage();
  68                 }
  69         argc -= optind;
  70         argv += optind;
  71
  72         for (len = 0; (ch = getchar()) != EOF;) {
  73                 if (isalpha(ch)) {
  74                         if (len >= sizeof(buf)) {
  75                                 (void)fprintf(stderr, "pig: ate too much!\n");
  76                                 exit(1);
  77                         }
  78                         buf[len++] = ch;
  79                         continue;
  80                 }
  81                 if (len != 0) {
  82                         pigout(buf, len);
  83                         len = 0;
  84                 }
  85                 (void)putchar(ch);
  86         }
  87         exit(0);
  88 }
  89
  90 void
  91 pigout(buf, len)
  92         char *buf;
  93         int len;
  94 {
  95         register int ch, start;
  96         int olen;
  97
  98         /*
  99          * If the word starts with a vowel, append "way".  Don't treat 'y'
 100          * as a vowel if it appears first.
 101          */
 102         if (index("aeiouAEIOU", buf[0]) != NULL) {
 103                 (void)printf("%.*sway", len, buf);
 104                 return;
 105         }
 106
 107         /*
 108          * Copy leading consonants to the end of the word.  The unit "qu"
 109          * isn't treated as a vowel.
 110          */
 111         for (start = 0, olen = len;
 112             !index("aeiouyAEIOUY", buf[start]) && start < olen;) {
 113                 ch = buf[len++] = buf[start++];
 114                 if ((ch == 'q' || ch == 'Q') && start < olen &&
 115                     (buf[start] == 'u' || buf[start] == 'U'))
 116                         buf[len++] = buf[start++];
 117         }
 118         (void)printf("%.*say", olen, buf + start);
 119 }
 120
 121 void
 122 usage()
 123 {
 124         (void)fprintf(stderr, "usage: pig\n");
 125         exit(1);
 126 }