usr/src/games/fortune/unstr/unstr.c

/*-
 * Copyright (c) 1991 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Ken Arnold.
 *
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. 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.
 */

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1991 The Regents of the University of California.\n\
 All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)unstr.c     5.8 (Berkeley) 4/8/91";
#endif /* not lint */

/*
 *      This program un-does what "strfile" makes, thereby obtaining the
 * original file again.  This can be invoked with the name of the output
 * file, the input file, or both. If invoked with only a single argument
 * ending in ".dat", it is pressumed to be the input file and the output
 * file will be the same stripped of the ".dat".  If the single argument
 * doesn't end in ".dat", then it is presumed to be the output file, and
 * the input file is that name prepended by a ".dat".  If both are given
 * they are treated literally as the input and output files.
 *
 *      Ken Arnold              Aug 13, 1978
 */

# include       <machine/endian.h>
# include       <sys/param.h>
# include       "strfile.h"
# include       <stdio.h>
# include       <ctype.h>

# ifndef MAXPATHLEN
# define        MAXPATHLEN      1024
# endif /* MAXPATHLEN */

char    *Infile,                        /* name of input file */
        Datafile[MAXPATHLEN],           /* name of data file */
        Delimch;                        /* delimiter character */

FILE    *Inf, *Dataf;

char    *strcat(), *strcpy();

/* ARGSUSED */
main(ac, av)
int     ac;
char    **av;
{
        static STRFILE  tbl;            /* description table */

        getargs(av);
        if ((Inf = fopen(Infile, "r")) == NULL) {
                perror(Infile);
                exit(1);
        }
        if ((Dataf = fopen(Datafile, "r")) == NULL) {
                perror(Datafile);
                exit(1);
        }
        (void) fread((char *) &tbl, sizeof tbl, 1, Dataf);
        tbl.str_version = ntohl(tbl.str_version);
        tbl.str_numstr = ntohl(tbl.str_numstr);
        tbl.str_longlen = ntohl(tbl.str_longlen);
        tbl.str_shortlen = ntohl(tbl.str_shortlen);
        tbl.str_flags = ntohl(tbl.str_flags);
        if (!(tbl.str_flags & (STR_ORDERED | STR_RANDOM))) {
                fprintf(stderr, "nothing to do -- table in file order\n");
                exit(1);
        }
        Delimch = tbl.str_delim;
        order_unstr(&tbl);
        (void) fclose(Inf);
        (void) fclose(Dataf);
        exit(0);
}

getargs(av)
register char   *av[];
{
        if (!*++av) {
                (void) fprintf(stderr, "usage: unstr datafile\n");
                exit(1);
        }
        Infile = *av;
        (void) strcpy(Datafile, Infile);
        (void) strcat(Datafile, ".dat");
}

order_unstr(tbl)
register STRFILE        *tbl;
{
        register int    i;
        register char   *sp;
        auto off_t      pos;
        char            buf[BUFSIZ];

        for (i = 0; i < tbl->str_numstr; i++) {
                (void) fread((char *) &pos, 1, sizeof pos, Dataf);
                (void) fseek(Inf, ntohl(pos), 0);
                if (i != 0)
                        (void) printf("%c\n", Delimch);
                for (;;) {
                        sp = fgets(buf, sizeof buf, Inf);
                        if (sp == NULL || STR_ENDSTRING(sp, *tbl))
                                break;
                        else
                                fputs(sp, stdout);
                }
        }
}