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unstr.c revision 1.3 
      1 /*	$NetBSD: unstr.c,v 1.3 1995/03/23 08:29:00 cgd Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1991, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * Ken Arnold.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the University of
     21  *	California, Berkeley and its contributors.
     22  * 4. Neither the name of the University nor the names of its contributors
     23  *    may be used to endorse or promote products derived from this software
     24  *    without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  * SUCH DAMAGE.
     37  */
     38 
     39 #ifndef lint
     40 static char copyright[] =
     41 "@(#) Copyright (c) 1991, 1993\n\
     42 	The Regents of the University of California.  All rights reserved.\n";
     43 #endif /* not lint */
     44 
     45 #ifndef lint
     46 static char sccsid[] = "@(#)unstr.c	8.1 (Berkeley) 5/31/93";
     47 #endif /* not lint */
     48 
     49 /*
     50  *	This program un-does what "strfile" makes, thereby obtaining the
     51  * original file again.  This can be invoked with the name of the output
     52  * file, the input file, or both. If invoked with only a single argument
     53  * ending in ".dat", it is pressumed to be the input file and the output
     54  * file will be the same stripped of the ".dat".  If the single argument
     55  * doesn't end in ".dat", then it is presumed to be the output file, and
     56  * the input file is that name prepended by a ".dat".  If both are given
     57  * they are treated literally as the input and output files.
     58  *
     59  *	Ken Arnold		Aug 13, 1978
     60  */
     61 
     62 # include	<machine/endian.h>
     63 # include	<sys/param.h>
     64 # include	"strfile.h"
     65 # include	<stdio.h>
     66 # include	<ctype.h>
     67 
     68 # ifndef MAXPATHLEN
     69 # define	MAXPATHLEN	1024
     70 # endif	/* MAXPATHLEN */
     71 
     72 char	*Infile,			/* name of input file */
     73 	Datafile[MAXPATHLEN],		/* name of data file */
     74 	Delimch;			/* delimiter character */
     75 
     76 FILE	*Inf, *Dataf;
     77 
     78 char	*strcat(), *strcpy();
     79 
     80 /* ARGSUSED */
     81 main(ac, av)
     82 int	ac;
     83 char	**av;
     84 {
     85 	static STRFILE	tbl;		/* description table */
     86 
     87 	getargs(av);
     88 	if ((Inf = fopen(Infile, "r")) == NULL) {
     89 		perror(Infile);
     90 		exit(1);
     91 	}
     92 	if ((Dataf = fopen(Datafile, "r")) == NULL) {
     93 		perror(Datafile);
     94 		exit(1);
     95 	}
     96 	(void) fread((char *) &tbl, sizeof tbl, 1, Dataf);
     97 	tbl.str_version = ntohl(tbl.str_version);
     98 	tbl.str_numstr = ntohl(tbl.str_numstr);
     99 	tbl.str_longlen = ntohl(tbl.str_longlen);
    100 	tbl.str_shortlen = ntohl(tbl.str_shortlen);
    101 	tbl.str_flags = ntohl(tbl.str_flags);
    102 	if (!(tbl.str_flags & (STR_ORDERED | STR_RANDOM))) {
    103 		fprintf(stderr, "nothing to do -- table in file order\n");
    104 		exit(1);
    105 	}
    106 	Delimch = tbl.str_delim;
    107 	order_unstr(&tbl);
    108 	(void) fclose(Inf);
    109 	(void) fclose(Dataf);
    110 	exit(0);
    111 }
    112 
    113 getargs(av)
    114 register char	*av[];
    115 {
    116 	if (!*++av) {
    117 		(void) fprintf(stderr, "usage: unstr datafile\n");
    118 		exit(1);
    119 	}
    120 	Infile = *av;
    121 	(void) strcpy(Datafile, Infile);
    122 	(void) strcat(Datafile, ".dat");
    123 }
    124 
    125 order_unstr(tbl)
    126 register STRFILE	*tbl;
    127 {
    128 	register int	i;
    129 	register char	*sp;
    130 	auto off_t	pos;
    131 	char		buf[BUFSIZ];
    132 
    133 	for (i = 0; i < tbl->str_numstr; i++) {
    134 		(void) fread((char *) &pos, 1, sizeof pos, Dataf);
    135 		(void) fseek(Inf, ntohl(pos), 0);
    136 		if (i != 0)
    137 			(void) printf("%c\n", Delimch);
    138 		for (;;) {
    139 			sp = fgets(buf, sizeof buf, Inf);
    140 			if (sp == NULL || STR_ENDSTRING(sp, *tbl))
    141 				break;
    142 			else
    143 				fputs(sp, stdout);
    144 		}
    145 	}
    146 }
    147