| File: | src/games/backgammon/backgammon/../common_source/allow.c |
| Warning: | line 98, column 35 Although the value stored to 'r' is used in the enclosing expression, the value is never actually read from 'r' |
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| 1 | /* $OpenBSD: allow.c,v 1.6 2015/11/30 08:19:25 tb Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1980, 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. Neither the name of the University nor the names of its contributors |
| 16 | * may be used to endorse or promote products derived from this software |
| 17 | * without specific prior written permission. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 29 | * SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | #include "back.h" |
| 33 | |
| 34 | int |
| 35 | movallow(void) |
| 36 | { |
| 37 | int i, m, iold, r; |
| 38 | |
| 39 | if (d0) |
| 40 | swap{dice[0] ^= dice[1]; dice[1] ^= dice[0]; dice[0] ^= dice[1]; d0 = 1-d0;}; |
| 41 | m = (D0dice[0] == D1dice[1] ? 4 : 2); |
| 42 | for (i = 0; i < 4; i++) |
| 43 | p[i] = bar; |
| 44 | i = iold = 0; |
| 45 | while (i < m) { |
| 46 | if (*offptr == 15) |
| 47 | break; |
| 48 | h[i] = 0; |
| 49 | if (board[bar]) { |
| 50 | if (i == 1 || m == 4) |
| 51 | g[i] = bar + cturn * D1dice[1]; |
| 52 | else |
| 53 | g[i] = bar + cturn * D0dice[0]; |
| 54 | if ((r = makmove(i))) { |
| 55 | if (d0 || m == 4) |
| 56 | break; |
| 57 | swap{dice[0] ^= dice[1]; dice[1] ^= dice[0]; dice[0] ^= dice[1]; d0 = 1-d0;}; |
| 58 | movback(i); |
| 59 | if (i > iold) |
| 60 | iold = i; |
| 61 | for (i = 0; i < 4; i++) |
| 62 | p[i] = bar; |
| 63 | i = 0; |
| 64 | } else |
| 65 | i++; |
| 66 | continue; |
| 67 | } |
| 68 | if ((p[i] += cturn) == home) { |
| 69 | if (i > iold) |
| 70 | iold = i; |
| 71 | if (m == 2 && i) { |
| 72 | movback(i); |
| 73 | p[i--] = bar; |
| 74 | if (p[i] != bar) |
| 75 | continue; |
| 76 | else |
| 77 | break; |
| 78 | } |
| 79 | if (d0 || m == 4) |
| 80 | break; |
| 81 | swap{dice[0] ^= dice[1]; dice[1] ^= dice[0]; dice[0] ^= dice[1]; d0 = 1-d0;}; |
| 82 | movback(i); |
| 83 | for (i = 0; i < 4; i++) |
| 84 | p[i] = bar; |
| 85 | i = 0; |
| 86 | continue; |
| 87 | } |
| 88 | if (i == 1 || m == 4) |
| 89 | g[i] = p[i] + cturn * D1dice[1]; |
| 90 | else |
| 91 | g[i] = p[i] + cturn * D0dice[0]; |
| 92 | if (g[i] * cturn > home) { |
| 93 | if (*offptr >= 0) |
| 94 | g[i] = home; |
| 95 | else |
| 96 | continue; |
| 97 | } |
| 98 | if (board[p[i]] * cturn > 0 && (r = makmove(i)) == 0) |
Although the value stored to 'r' is used in the enclosing expression, the value is never actually read from 'r' | |
| 99 | i++; |
| 100 | } |
| 101 | movback(i); |
| 102 | return (iold > i ? iold : i); |
| 103 | } |