mille/varpush.c

   1 /*      $NetBSD: varpush.c,v 1.6 1997/10/12 00:54:44 lukem Exp $        */
   2
   3 /*
   4  * Copyright (c) 1982, 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. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by the University of
  18  *      California, Berkeley and its contributors.
  19  * 4. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include <sys/cdefs.h>
  37 #ifndef lint
  38 #if 0
  39 static char sccsid[] = "@(#)varpush.c   8.1 (Berkeley) 5/31/93";
  40 #else
  41 __RCSID("$NetBSD: varpush.c,v 1.6 1997/10/12 00:54:44 lukem Exp $");
  42 #endif
  43 #endif /* not lint */
  44
  45 # include       <paths.h>
  46 # include       "mille.h"
  47
  48 /*
  49  * @(#)varpush.c        1.1 (Berkeley) 4/1/82
  50  */
  51
  52 /*
  53  *      push variables around via the routine func() on the file
  54  * channel file.  func() is either read or write.
  55  */
  56 bool
  57 varpush(file, func)
  58         int     file;
  59         ssize_t (*func) __P((int, const struct iovec *, int));
  60 {
  61         int             temp;
  62         const struct iovec vec[] = {
  63                 { (void *) &Debug, sizeof Debug },
  64                 { (void *) &Finished, sizeof Finished },
  65                 { (void *) &Order, sizeof Order },
  66                 { (void *) &End, sizeof End },
  67                 { (void *) &On_exit, sizeof On_exit },
  68                 { (void *) &Handstart, sizeof Handstart },
  69                 { (void *) &Numgos, sizeof Numgos },
  70                 { (void *) Numseen, sizeof Numseen },
  71                 { (void *) &Play, sizeof Play },
  72                 { (void *) &Window, sizeof Window },
  73                 { (void *) Deck, sizeof Deck },
  74                 { (void *) &Discard, sizeof Discard },
  75                 { (void *) Player, sizeof Player }
  76         };
  77
  78         if (((func)(file, vec, sizeof(vec) / sizeof(vec[0]))) < 0) {
  79                 error(strerror(errno));
  80                 return FALSE;
  81         }
  82         if (func == readv) {
  83                 if ((read(file, (void *) &temp, sizeof temp)) < 0) {
  84                         error(strerror(errno));
  85                         return FALSE;
  86                 }
  87                 Topcard = &Deck[temp];
  88 #ifdef DEBUG
  89                 if (Debug) {
  90                         char    buf[80];
  91 over:
  92                         printf("Debug file:");
  93                         gets(buf);
  94                         if ((outf = fopen(buf, "w")) == NULL) {
  95                                 warn("%s", buf);
  96                                 goto over;
  97                         }
  98                         if (strcmp(buf, _PATH_DEVNULL) != 0)
  99                                 setbuf(outf, (char *)NULL);
 100                 }
 101 #endif
 102         } else {
 103                 temp = Topcard - Deck;
 104                 if ((write(file, (void *) &temp, sizeof temp)) < 0) {
 105                         error(strerror(errno));
 106                         return FALSE;
 107                 }
 108         }
 109         return TRUE;
 110 }