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. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  * $FreeBSD: src/games/fortune/unstr/unstr.c,v 1.5 1999/11/16 02:57:01 billf Exp $
  37  * $DragonFly: src/games/fortune/unstr/unstr.c,v 1.4 2006/08/08 16:58:59 pavalos Exp $
  38  *
  39  * @(#) Copyright (c) 1991, 1993 The Regents of the University of California.  All rights reserved.
  40  * @(#)unstr.c     8.1 (Berkeley) 5/31/93
  41  * $FreeBSD: src/games/fortune/unstr/unstr.c,v 1.5 1999/11/16 02:57:01 billf Exp $
  42  */
  43
  44 /*
  45  *      This program un-does what "strfile" makes, thereby obtaining the
  46  * original file again.  This can be invoked with the name of the output
  47  * file, the input file, or both. If invoked with only a single argument
  48  * ending in ".dat", it is pressumed to be the input file and the output
  49  * file will be the same stripped of the ".dat".  If the single argument
  50  * doesn't end in ".dat", then it is presumed to be the output file, and
  51  * the input file is that name prepended by a ".dat".  If both are given
  52  * they are treated literally as the input and output files.
  53  *
  54  *      Ken Arnold              Aug 13, 1978
  55  */
  56
  57 # include       <sys/param.h>
  58 # include       <stdio.h>
  59 # include       <ctype.h>
  60 # include       <stdlib.h>
  61 # include       <string.h>
  62 # include       "strfile.h"
  63
  64 char    *Infile,                        /* name of input file */
  65         Datafile[MAXPATHLEN],           /* name of data file */
  66         Delimch;                        /* delimiter character */
  67
  68 FILE    *Inf, *Dataf;
  69
  70 void    getargs(char *[]);
  71 void    order_unstr(STRFILE *);
  72
  73 /* ARGSUSED */
  74 int
  75 main(__unused int ac, char **av)
  76 {
  77         static STRFILE  tbl;            /* description table */
  78
  79         getargs(av);
  80         if ((Inf = fopen(Infile, "r")) == NULL) {
  81                 perror(Infile);
  82                 exit(1);
  83         }
  84         if ((Dataf = fopen(Datafile, "r")) == NULL) {
  85                 perror(Datafile);
  86                 exit(1);
  87         }
  88         (void) fread((char *) &tbl, sizeof tbl, 1, Dataf);
  89         tbl.str_version = ntohl(tbl.str_version);
  90         tbl.str_numstr = ntohl(tbl.str_numstr);
  91         tbl.str_longlen = ntohl(tbl.str_longlen);
  92         tbl.str_shortlen = ntohl(tbl.str_shortlen);
  93         tbl.str_flags = ntohl(tbl.str_flags);
  94         if (!(tbl.str_flags & (STR_ORDERED | STR_RANDOM))) {
  95                 fprintf(stderr, "nothing to do -- table in file order\n");
  96                 exit(1);
  97         }
  98         Delimch = tbl.str_delim;
  99         order_unstr(&tbl);
 100         (void) fclose(Inf);
 101         (void) fclose(Dataf);
 102         exit(0);
 103 }
 104
 105 void
 106 getargs(char *av[])
 107 {
 108         if (!*++av) {
 109                 (void) fprintf(stderr, "usage: unstr datafile\n");
 110                 exit(1);
 111         }
 112         Infile = *av;
 113         (void) strcpy(Datafile, Infile);
 114         (void) strcat(Datafile, ".dat");
 115 }
 116
 117 void
 118 order_unstr(STRFILE *tbl)
 119 {
 120         unsigned int    i;
 121         char    *sp;
 122         long            pos;
 123         char            buf[BUFSIZ];
 124
 125         for (i = 0; i < tbl->str_numstr; i++) {
 126                 (void) fread((char *) &pos, 1, sizeof pos, Dataf);
 127                 (void) fseek(Inf, ntohl(pos), 0);
 128                 if (i != 0)
 129                         (void) printf("%c\n", Delimch);
 130                 for (;;) {
 131                         sp = fgets(buf, sizeof buf, Inf);
 132                         if (sp == NULL || STR_ENDSTRING(sp, *tbl))
 133                                 break;
 134                         else
 135                                 fputs(sp, stdout);
 136                 }
 137         }
 138 }