backgammon/common_source/save.c

   1 /*      $NetBSD: save.c,v 1.16 2012/10/13 19:19:39 dholland Exp $       */
   2
   3 /*
   4  * Copyright (c) 1980, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 #if 0
  35 static char sccsid[] = "@(#)save.c      8.1 (Berkeley) 5/31/93";
  36 #else
  37 __RCSID("$NetBSD: save.c,v 1.16 2012/10/13 19:19:39 dholland Exp $");
  38 #endif
  39 #endif /* not lint */
  40
  41 #include <errno.h>
  42
  43 #include "back.h"
  44
  45 static const char confirm[] = "Are you sure you want to leave now?";
  46 static const char prompt[] = "Enter a file name:  ";
  47 static const char exist1[] = "The file '";
  48 static const char exist2[] =
  49 "' already exists.\nAre you sure you want to use this file?";
  50 static const char cantuse[] = "\nCan't use ";
  51 static const char saved[] = "This game has been saved on the file '";
  52 static const char type[] = "'.\nType \"backgammon ";
  53 static const char rec[] = "\" to recover your game.\n\n";
  54 static const char cantrec[] = "Can't recover file:  ";
  55
  56 static void norec(const char *) __dead;
  57
  58 void
  59 save(struct move *mm, int n)
  60 {
  61         int     fdesc;
  62         char   *fs;
  63         char    fname[50];
  64
  65         if (n) {
  66                 if (tflag) {
  67                         curmove(20, 0);
  68                         clend();
  69                 } else
  70                         writec('\n');
  71                 writel(confirm);
  72                 if (!yorn(0))
  73                         return;
  74         }
  75         cflag = 1;
  76         for (;;) {
  77                 writel(prompt);
  78                 fs = fname;
  79                 while ((*fs = readc()) != '\n') {
  80                         if (*fs == old.c_cc[VERASE]) {
  81                                 if (fs > fname) {
  82                                         fs--;
  83                                         if (tflag)
  84                                                 curmove(curr, curc - 1);
  85                                         else
  86                                                 writec(*fs);
  87                                 } else
  88                                         writec('\007');
  89                                 continue;
  90                         }
  91                         writec(*fs++);
  92                 }
  93                 *fs = '\0';
  94                 if ((fdesc = open(fname, O_RDWR)) == -1 && errno == ENOENT) {
  95                         if ((fdesc = creat(fname, 0600)) != -1)
  96                                 break;
  97                 }
  98                 if (fdesc != -1) {
  99                         if (tflag) {
 100                                 curmove(18, 0);
 101                                 clend();
 102                         } else
 103                                 writec('\n');
 104                         writel(exist1);
 105                         writel(fname);
 106                         writel(exist2);
 107                         cflag = 0;
 108                         close(fdesc);
 109                         if (yorn(0)) {
 110                                 unlink(fname);
 111                                 fdesc = creat(fname, 0600);
 112                                 break;
 113                         } else {
 114                                 cflag = 1;
 115                                 continue;
 116                         }
 117                 }
 118                 writel(cantuse);
 119                 writel(fname);
 120                 writel(".\n");
 121                 cflag = 1;
 122         }
 123         write(fdesc, board, sizeof board);
 124         write(fdesc, off, sizeof off);
 125         write(fdesc, in, sizeof in);
 126         write(fdesc, mm->dice, sizeof mm->dice);
 127         write(fdesc, &cturn, sizeof cturn);
 128         write(fdesc, &dlast, sizeof dlast);
 129         write(fdesc, &pnum, sizeof pnum);
 130         write(fdesc, &rscore, sizeof rscore);
 131         write(fdesc, &wscore, sizeof wscore);
 132         write(fdesc, &gvalue, sizeof gvalue);
 133         write(fdesc, &raflag, sizeof raflag);
 134         close(fdesc);
 135         if (tflag)
 136                 curmove(18, 0);
 137         writel(saved);
 138         writel(fname);
 139         writel(type);
 140         writel(fname);
 141         writel(rec);
 142         if (tflag)
 143                 clend();
 144         getout(0);
 145 }
 146
 147 void
 148 recover(struct move *mm, const char *s)
 149 {
 150         int     fdesc;
 151
 152         if ((fdesc = open(s, O_RDONLY)) == -1)
 153                 norec(s);
 154         read(fdesc, board, sizeof board);
 155         read(fdesc, off, sizeof off);
 156         read(fdesc, in, sizeof in);
 157         read(fdesc, mm->dice, sizeof mm->dice);
 158         read(fdesc, &cturn, sizeof cturn);
 159         read(fdesc, &dlast, sizeof dlast);
 160         read(fdesc, &pnum, sizeof pnum);
 161         read(fdesc, &rscore, sizeof rscore);
 162         read(fdesc, &wscore, sizeof wscore);
 163         read(fdesc, &gvalue, sizeof gvalue);
 164         read(fdesc, &raflag, sizeof raflag);
 165         close(fdesc);
 166         rflag = 1;
 167 }
 168
 169 static void
 170 norec(const char *s)
 171 {
 172         const char   *c;
 173
 174         tflag = 0;
 175         writel(cantrec);
 176         c = s;
 177         while (*c != '\0')
 178                 writec(*c++);
 179         getout(0);
 180 }