/*      $OpenBSD: mkindex.c,v 1.9 2016/01/07 16:00:31 tb Exp $  */
/*      $NetBSD: mkindex.c,v 1.2 1995/03/21 12:14:52 cgd Exp $  */

/*-
 * Copyright (c) 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Barry Brachman.
 *
 * 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.
 */

#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include "bog.h"

char *nextword(FILE *, char *, int *, int *);

int
main(int argc, char *argv[])
{
        int clen, rlen, prev;
        long off, start;
        char buf[MAXWORDLEN + 1];

        if (pledge("stdio", NULL) == -1)
                err(1, "pledge");

        prev = '\0';
        off = start = 0L;
        while (nextword(stdin, buf, &clen, &rlen) != NULL) {
                if (*buf != prev) {
                        if (prev != '\0')
                                printf("%c %6ld %6ld\n", prev, start, off - 1);
                        prev = *buf;
                        start = off;
                }
                off += clen + 1;
        }
        printf("%c %6ld %6ld\n", prev, start, off - 1);
        return 0;
}

/*
 * Return the next word in the compressed dictionary in 'buffer' or
 * NULL on end-of-file
 * Also set clen to the length of the compressed word (for mkindex) and
 * rlen to the strlen() of the real word
 */
char *
nextword(FILE *fp, char *buffer, int *clen, int *rlen)
{
        int ch, pcount;
        char *p, *q;
        static char buf[MAXWORDLEN + 1];
        static int first = 1;
        static int lastch = 0;

        if (first) {
                if ((pcount = getc(fp)) == EOF)
                        return (NULL);
                first = 0;
        }
        else if ((pcount = lastch) == EOF)
                return (NULL);

        p = buf + (*clen = pcount);
 
        while ((ch = getc(fp)) != EOF && ch >= 'a')
                        *p++ = ch;
                lastch = ch;
        *p = '\0';

        *rlen = (int) (p - buf);
        *clen = *rlen - *clen;

        p = buf;
        q = buffer;
        while ((*q++ = *p) != '\0') {
                if (*p++ == 'q')
                        *q++ = 'u';
        }
        return (buffer);
}