games/fortune/unstr/unstr.c

   1 /*      $NetBSD: unstr.c,v 1.14 2012/06/19 05:46:08 dholland 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. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 #ifndef lint
  37 __COPYRIGHT("@(#) Copyright (c) 1991, 1993\
  38  The Regents of the University of California.  All rights reserved.");
  39 #endif /* not lint */
  40
  41 #ifndef lint
  42 #if 0
  43 static char sccsid[] = "@(#)unstr.c     8.1 (Berkeley) 5/31/93";
  44 #else
  45 __RCSID("$NetBSD: unstr.c,v 1.14 2012/06/19 05:46:08 dholland Exp $");
  46 #endif
  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       <sys/types.h>
  63 # include       <sys/param.h>
  64 # include       <sys/endian.h>
  65 # include       <ctype.h>
  66 # include       <err.h>
  67 # include       <stdio.h>
  68 # include       <stdlib.h>
  69 # include       <string.h>
  70 # include       "strfile.h"
  71
  72 # ifndef MAXPATHLEN
  73 # define        MAXPATHLEN      1024
  74 # endif /* MAXPATHLEN */
  75
  76 char    *Infile,                        /* name of input file */
  77         Datafile[MAXPATHLEN],           /* name of data file */
  78         Delimch;                        /* delimiter character */
  79
  80 FILE    *Inf, *Dataf;
  81
  82 void    getargs(char *[]);
  83 int     main(int, char *[]);
  84 void    order_unstr(STRFILE *);
  85
  86 /* ARGSUSED */
  87 int
  88 main(int ac __unused, char **av)
  89 {
  90         static STRFILE  tbl;            /* description table */
  91
  92         getargs(av);
  93         if ((Inf = fopen(Infile, "r")) == NULL)
  94                 err(1, "fopen %s", Infile);
  95         if ((Dataf = fopen(Datafile, "r")) == NULL)
  96                 err(1, "fopen %s", Datafile);
  97         (void) fread((char *) &tbl, sizeof tbl, 1, Dataf);
  98         BE32TOH(tbl.str_version);
  99         BE32TOH(tbl.str_numstr);
 100         BE32TOH(tbl.str_longlen);
 101         BE32TOH(tbl.str_shortlen);
 102         BE32TOH(tbl.str_flags);
 103         if (!(tbl.str_flags & (STR_ORDERED | STR_RANDOM))) {
 104                 fprintf(stderr, "nothing to do -- table in file order\n");
 105                 exit(1);
 106         }
 107         Delimch = tbl.str_delim;
 108         order_unstr(&tbl);
 109         (void) fclose(Inf);
 110         (void) fclose(Dataf);
 111         exit(0);
 112 }
 113
 114 void
 115 getargs(char *av[])
 116 {
 117         if (!*++av) {
 118                 (void) fprintf(stderr, "usage: unstr datafile\n");
 119                 exit(1);
 120         }
 121         Infile = *av;
 122         (void) strcpy(Datafile, Infile);
 123         (void) strcat(Datafile, ".dat");
 124 }
 125
 126 void
 127 order_unstr(STRFILE *tbl)
 128 {
 129         unsigned int    i;
 130         char    *sp;
 131         off_t   pos;
 132         char    buf[BUFSIZ];
 133
 134         for (i = 0; i < tbl->str_numstr; i++) {
 135                 (void) fread((char *) &pos, 1, sizeof pos, Dataf);
 136                 (void) fseek(Inf, be64toh(pos), SEEK_SET);
 137                 if (i != 0)
 138                         (void) printf("%c\n", Delimch);
 139                 for (;;) {
 140                         sp = fgets(buf, sizeof buf, Inf);
 141                         if (sp == NULL || STR_ENDSTRING(sp, *tbl))
 142                                 break;
 143                         else
 144                                 fputs(sp, stdout);
 145                 }
 146         }
 147 }