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