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
varpush(int file,ssize_t (* func)(int,const struct iovec *,int))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 }
99