games/mille/varpush.c

   1 /*
   2  * Copyright (c) 1982, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#)varpush.c        8.1 (Berkeley) 5/31/93
  34  * $FreeBSD: src/games/mille/varpush.c,v 1.6 1999/12/12 06:17:25 billf Exp $
  35  * $DragonFly: src/games/mille/varpush.c,v 1.3 2006/08/27 17:17:23 pavalos Exp $
  36  */
  37
  38 # include       <errno.h>
  39 # include       <paths.h>
  40 # include       "mille.h"
  41
  42 /*
  43  * @(#)varpush.c        1.1 (Berkeley) 4/1/82
  44  */
  45
  46 /*
  47  *      push variables around via the routine func() on the file
  48  * channel file.  func() is either readv or writev.
  49  */
  50 bool
  51 varpush(int file, ssize_t (*func)(int, const struct iovec *, int))
  52 {
  53
  54         int     temp;
  55         const struct iovec iov[] = {
  56         { (void *) &Debug,      sizeof Debug },
  57         { (void *) &Finished,   sizeof Finished },
  58         { (void *) &Order,      sizeof Order },
  59         { (void *) &End,        sizeof End },
  60         { (void *) &On_exit,    sizeof On_exit },
  61         { (void *) &Handstart,  sizeof Handstart },
  62         { (void *) &Numgos,     sizeof Numgos },
  63         { (void *)  Numseen,    sizeof Numseen },
  64         { (void *) &Play,       sizeof Play },
  65         { (void *) &Window,     sizeof Window },
  66         { (void *)  Deck,       sizeof Deck },
  67         { (void *) &Discard,    sizeof Discard },
  68         { (void *)  Player,     sizeof Player }
  69         };
  70
  71         if (((func)(file, iov, sizeof(iov) /sizeof(iov[0]))) < 0) {
  72                 error(strerror(errno));
  73                 return FALSE;
  74         }
  75
  76         if (func == readv) {
  77                 if ((read(file, (void *) &temp, sizeof temp)) < 0) {
  78                         error(strerror(errno));
  79                         return FALSE;
  80                 }
  81                 Topcard = &Deck[temp];
  82 #ifdef DEBUG
  83                 if (Debug) {
  84                         char    buf[80];
  85 over:
  86                         printf("Debug file:");
  87                         fgets(buf, 80, stdin);
  88                         if ((outf = fopen(buf, "w")) == NULL) {
  89                                 perror(buf);
  90                                 goto over;
  91                         }
  92                         if (strcmp(buf, _PATH_DEVNULL) != 0)
  93                                 setbuf(outf, NULL);
  94                 }
  95 #endif
  96         }
  97         else {
  98                 temp = Topcard - Deck;
  99                 if ((write(file, (void *) &temp, sizeof temp)) < 0) {
 100                         error(strerror(errno));
 101                         return FALSE;
 102                 }
 103         }
 104         return TRUE;
 105 }