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varpush.c revision 1.6 
      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 }
    111