games/fortune/unstr/unstr.c

   1 /*-
   2  * Copyright (c) 1991, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Ken Arnold.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * $FreeBSD: src/games/fortune/unstr/unstr.c,v 1.5 1999/11/16 02:57:01 billf Exp $
  33  * $DragonFly: src/games/fortune/unstr/unstr.c,v 1.4 2006/08/08 16:58:59 pavalos Exp $
  34  *
  35  * @(#) Copyright (c) 1991, 1993 The Regents of the University of California.  All rights reserved.
  36  * @(#)unstr.c     8.1 (Berkeley) 5/31/93
  37  * $FreeBSD: src/games/fortune/unstr/unstr.c,v 1.5 1999/11/16 02:57:01 billf Exp $
  38  */
  39
  40 /*
  41  *      This program un-does what "strfile" makes, thereby obtaining the
  42  * original file again.  This can be invoked with the name of the output
  43  * file, the input file, or both. If invoked with only a single argument
  44  * ending in ".dat", it is pressumed to be the input file and the output
  45  * file will be the same stripped of the ".dat".  If the single argument
  46  * doesn't end in ".dat", then it is presumed to be the output file, and
  47  * the input file is that name prepended by a ".dat".  If both are given
  48  * they are treated literally as the input and output files.
  49  *
  50  *      Ken Arnold              Aug 13, 1978
  51  */
  52
  53 #include <sys/param.h>
  54 #include <netinet/in.h>
  55 #include <ctype.h>
  56 #include <stdio.h>
  57 #include <stdlib.h>
  58 #include <string.h>
  59 #include "strfile.h"
  60
  61 char    *Infile,                        /* name of input file */
  62         Datafile[MAXPATHLEN],           /* name of data file */
  63         Delimch;                        /* delimiter character */
  64
  65 FILE    *Inf, *Dataf;
  66
  67 void getargs(char *[]);
  68 void order_unstr(STRFILE *);
  69
  70 /* ARGSUSED */
  71 int
  72 main(int ac __unused, char *av[])
  73 {
  74         static STRFILE tbl;             /* description table */
  75
  76         getargs(av);
  77         if ((Inf = fopen(Infile, "r")) == NULL) {
  78                 perror(Infile);
  79                 exit(1);
  80         }
  81         if ((Dataf = fopen(Datafile, "r")) == NULL) {
  82                 perror(Datafile);
  83                 exit(1);
  84         }
  85         fread((char *)&tbl, sizeof(tbl), 1, Dataf);
  86         tbl.str_version = ntohl(tbl.str_version);
  87         tbl.str_numstr = ntohl(tbl.str_numstr);
  88         tbl.str_longlen = ntohl(tbl.str_longlen);
  89         tbl.str_shortlen = ntohl(tbl.str_shortlen);
  90         tbl.str_flags = ntohl(tbl.str_flags);
  91         if (!(tbl.str_flags & (STR_ORDERED | STR_RANDOM))) {
  92                 fprintf(stderr, "nothing to do -- table in file order\n");
  93                 exit(1);
  94         }
  95         Delimch = tbl.str_delim;
  96         order_unstr(&tbl);
  97         fclose(Inf);
  98         fclose(Dataf);
  99         exit(0);
 100 }
 101
 102 void
 103 getargs(char *av[])
 104 {
 105         if (!*++av) {
 106                 fprintf(stderr, "usage: unstr datafile\n");
 107                 exit(1);
 108         }
 109         Infile = *av;
 110         strcpy(Datafile, Infile);
 111         strcat(Datafile, ".dat");
 112 }
 113
 114 void
 115 order_unstr(STRFILE *tbl)
 116 {
 117         unsigned int i;
 118         char *sp;
 119         long pos;
 120         char buf[BUFSIZ];
 121
 122         for (i = 0; i < tbl->str_numstr; i++) {
 123                 fread((char *)&pos, 1, sizeof(pos), Dataf);
 124                 fseek(Inf, ntohl(pos), SEEK_SET);
 125                 if (i != 0)
 126                         printf("%c\n", Delimch);
 127                 for (;;) {
 128                         sp = fgets(buf, sizeof(buf), Inf);
 129                         if (sp == NULL || STR_ENDSTRING(sp, *tbl))
 130                                 break;
 131                         else
 132                                 fputs(sp, stdout);
 133                 }
 134         }
 135 }