/*-
 * Copyright (c) 1992, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * @(#) Copyright (c) 1992, 1993 The Regents of the University of California.  All rights reserved.
 * @(#)pig.c    8.2 (Berkeley) 5/4/95
 * $FreeBSD: src/games/pig/pig.c,v 1.7 1999/11/30 03:49:08 billf Exp $
 */

#include <sys/types.h>

#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

static void pigout(char *, int);
static void usage(void) __dead2;

int
main(int argc, char **argv)
{
        int len;
        int ch;
        char buf[1024];

        while ((ch = getopt(argc, argv, "")) != -1)
                switch(ch) {
                case '?':
                default:
                        usage();
                }
        argc -= optind;
        argv += optind;

        for (len = 0; (ch = getchar()) != EOF;) {
                if (isalpha(ch)) {
                        if (len >= (int)sizeof(buf)) {
                                fprintf(stderr, "pig: ate too much!\n");
                                exit(1);
                        }
                        buf[len++] = ch;
                        continue;
                }
                if (len != 0) {
                        pigout(buf, len);
                        len = 0;
                }
                putchar(ch);
        }
        exit(0);
}

static void
pigout(char *buf, int len)
{
        int ch, start;
        int olen;

        /*
         * If the word starts with a vowel, append "way".  Don't treat 'y'
         * as a vowel if it appears first.
         */
        if (index("aeiouAEIOU", buf[0]) != NULL) {
                printf("%.*sway", len, buf);
                return;
        }

        /*
         * Copy leading consonants to the end of the word.  The unit "qu"
         * isn't treated as a vowel.
         */
        for (start = 0, olen = len;
            start < olen && !index("aeiouyAEIOUY", buf[start]);) {
                ch = buf[len++] = buf[start++];
                if ((ch == 'q' || ch == 'Q') && start < olen &&
                    (buf[start] == 'u' || buf[start] == 'U'))
                        buf[len++] = buf[start++];
        }
        printf("%.*say", olen, buf + start);
}

static void
usage(void)
{
        fprintf(stderr, "usage: pig\n");
        exit(1);
}