src/chess/rules.c

Sat, 12 Apr 2014 13:42:57 +0200

author
Mike Becker <universe@uap-core.de>
date
Sat, 12 Apr 2014 13:42:57 +0200
changeset 38
75ee459ba941
parent 36
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child 40
47162a7621da
permissions
-rw-r--r--

fixed memory underflow bug in mvwasyncgetnstr

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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2014 Mike Becker. All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 *
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28 */
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29
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30 #include "rules.h"
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31 #include "chess.h"
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32 #include <string.h>
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33 #include <stdlib.h>
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34 #include <sys/time.h>
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35
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36 void gamestate_cleanup(GameState *gamestate) {
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37 MoveList *elem;
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38 elem = gamestate->movelist;
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39 while (elem) {
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40 MoveList *cur = elem;
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41 elem = elem->next;
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42 free(cur);
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43 };
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44 }
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45
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46 static void addmove(GameState* gamestate, Move *move) {
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47 MoveList *elem = malloc(sizeof(MoveList));
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48 elem->next = NULL;
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49 elem->move = *move;
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50
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51 gettimeofday(&(elem->move.timestamp), NULL);
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52
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53 if (gamestate->lastmove) {
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54 struct timeval *lasttstamp = &(gamestate->lastmove->move.timestamp);
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55 time_t sec = elem->move.timestamp.tv_sec - lasttstamp->tv_sec;
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56 suseconds_t micros;
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57 if (elem->move.timestamp.tv_usec < lasttstamp->tv_usec) {
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58 micros = 1e6L-(lasttstamp->tv_usec - elem->move.timestamp.tv_usec);
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59 sec--;
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60 } else {
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61 micros = elem->move.timestamp.tv_usec - lasttstamp->tv_usec;
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62 }
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63
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64 elem->move.movetime.tv_sec = sec;
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65 elem->move.movetime.tv_usec = micros;
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66
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67 gamestate->lastmove->next = elem;
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68 gamestate->lastmove = elem;
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69 } else {
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70 elem->move.movetime.tv_usec = 0;
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71 elem->move.movetime.tv_sec = 0;
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72 gamestate->movelist = gamestate->lastmove = elem;
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73 }
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74 }
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75
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76 char getpiecechr(uint8_t piece) {
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77 switch (piece & PIECE_MASK) {
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78 case ROOK: return 'R';
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79 case KNIGHT: return 'N';
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80 case BISHOP: return 'B';
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81 case QUEEN: return 'Q';
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82 case KING: return 'K';
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83 default: return '\0';
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84 }
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85 }
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86
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87 uint8_t getpiece(char c) {
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88 switch (c) {
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89 case 'R': return ROOK;
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90 case 'N': return KNIGHT;
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91 case 'B': return BISHOP;
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92 case 'Q': return QUEEN;
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93 case 'K': return KING;
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94 default: return 0;
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95 }
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96 }
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97
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98 static int getlocation(GameState *gamestate, Move *move) {
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99 uint8_t piece = move->piece & PIECE_MASK;
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100 switch (piece) {
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101 case PAWN: return pawn_getlocation(gamestate, move);
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102 case ROOK: return rook_getlocation(gamestate, move);
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103 case KNIGHT: return knight_getlocation(gamestate, move);
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104 case BISHOP: return bishop_getlocation(gamestate, move);
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105 case QUEEN: return queen_getlocation(gamestate, move);
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106 case KING: return king_getlocation(gamestate, move);
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107 default: return INVALID_MOVE_SYNTAX;
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108 }
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109 }
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110
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111 void apply_move(GameState *gamestate, Move *move) {
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112 uint8_t piece = move->piece & PIECE_MASK;
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113 uint8_t color = move->piece & COLOR_MASK;
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114
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115 /* en passant capture */
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116 if (move->capture && piece == PAWN &&
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117 mdst(gamestate->board, move) == 0) {
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118 gamestate->board[move->fromrow][move->tofile] = 0;
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119 }
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120
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121 /* remove old en passant threats */
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122 for (uint8_t file = 0 ; file < 8 ; file++) {
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123 gamestate->board[3][file] &= ~ENPASSANT_THREAT;
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124 gamestate->board[4][file] &= ~ENPASSANT_THREAT;
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125 }
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126
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127 /* add new en passant threat */
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128 if (piece == PAWN && (
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129 (move->fromrow == 1 && move->torow == 3) ||
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130 (move->fromrow == 6 && move->torow == 4))) {
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131 move->piece |= ENPASSANT_THREAT;
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132 }
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133
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134 /* move (and maybe capture or promote) */
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135 msrc(gamestate->board, move) = 0;
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136 if (move->promotion) {
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137 mdst(gamestate->board, move) = move->promotion;
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138 } else {
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139 mdst(gamestate->board, move) = move->piece;
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140 }
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141
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142 /* castling */
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143 if (piece == KING &&
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144 move->fromfile == fileidx('e')) {
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145
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146 if (move->tofile == fileidx('g')) {
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147 gamestate->board[move->torow][fileidx('h')] = 0;
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148 gamestate->board[move->torow][fileidx('f')] = color|ROOK;
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149 } else if (move->tofile == fileidx('c')) {
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150 gamestate->board[move->torow][fileidx('a')] = 0;
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151 gamestate->board[move->torow][fileidx('d')] = color|ROOK;
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152 }
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153 }
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154
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824c9522ce66 introduced game state structure
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diff changeset
155 addmove(gamestate, move);
19
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156 }
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157
29
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
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diff changeset
158 static _Bool validate_move_rules(GameState *gamestate, Move *move) {
19
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159 /* validate indices (don't trust opponent) */
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diff changeset
160 if (!chkidx(move)) {
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161 return 0;
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162 }
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163
21
2e5846019b4f implemented rook + some fixes
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diff changeset
164 /* must move */
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diff changeset
165 if (move->fromfile == move->tofile && move->fromrow == move->torow) {
2e5846019b4f implemented rook + some fixes
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diff changeset
166 return 0;
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diff changeset
167 }
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diff changeset
168
19
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169 /* does piece exist */
29
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diff changeset
170 if (msrc(gamestate->board, move) != move->piece) {
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diff changeset
171 return 0;
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diff changeset
172 }
19
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173
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174 /* can't capture own pieces */
29
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diff changeset
175 if ((mdst(gamestate->board, move) & COLOR_MASK)
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diff changeset
176 == (move->piece & COLOR_MASK)) {
19
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177 return 0;
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178 }
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179
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180 /* validate individual rules */
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181 switch (move->piece & PIECE_MASK) {
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182 case PAWN:
29
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183 return pawn_chkrules(gamestate, move) &&
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184 !pawn_isblocked(gamestate, move);
19
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185 case ROOK:
29
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186 return rook_chkrules(move) &&
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187 !rook_isblocked(gamestate, move);
19
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188 case KNIGHT:
29
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diff changeset
189 return knight_chkrules(move); /* knight is never blocked */
19
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190 case BISHOP:
29
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diff changeset
191 return bishop_chkrules(move) &&
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192 !bishop_isblocked(gamestate, move);
19
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193 case QUEEN:
29
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194 return queen_chkrules(move) &&
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195 !queen_isblocked(gamestate, move);
19
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196 case KING:
29
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diff changeset
197 return king_chkrules(gamestate, move) &&
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diff changeset
198 !king_isblocked(gamestate, move);
19
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199 default:
29
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diff changeset
200 return 0;
19
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201 }
29
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diff changeset
202 }
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diff changeset
203
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diff changeset
204 _Bool validate_move(GameState *gamestate, Move *move) {
19
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205
29
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diff changeset
206 _Bool result = validate_move_rules(gamestate, move);
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diff changeset
207
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diff changeset
208 /* cancel processing to save resources */
25
3ab0c2e1a4e2 implemented king
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diff changeset
209 if (!result) {
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210 return 0;
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211 }
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diff changeset
212
28
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diff changeset
213 /* find kings for check validation */
29
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diff changeset
214 uint8_t piececolor = (move->piece & COLOR_MASK);
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diff changeset
215
28
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diff changeset
216 uint8_t mykingfile = 0, mykingrow = 0, opkingfile = 0, opkingrow = 0;
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diff changeset
217 for (uint8_t row = 0 ; row < 8 ; row++) {
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diff changeset
218 for (uint8_t file = 0 ; file < 8 ; file++) {
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diff changeset
219 if (gamestate->board[row][file] ==
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diff changeset
220 (piececolor == WHITE?WKING:BKING)) {
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diff changeset
221 mykingfile = file;
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diff changeset
222 mykingrow = row;
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diff changeset
223 } else if (gamestate->board[row][file] ==
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diff changeset
224 (piececolor == WHITE?BKING:WKING)) {
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diff changeset
225 opkingfile = file;
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diff changeset
226 opkingrow = row;
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diff changeset
227 }
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diff changeset
228 }
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diff changeset
229 }
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diff changeset
230
0c1371488d87 NEED TESTING: implemented check and checkmate - TODO: avoid checkmate by moving another piece in between
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diff changeset
231 /* simulation move for check validation */
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diff changeset
232 GameState simulation;
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diff changeset
233 memcpy(&simulation, gamestate, sizeof(GameState));
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diff changeset
234 apply_move(&simulation, move);
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diff changeset
235
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diff changeset
236 /* don't move into or stay in check position */
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diff changeset
237 if (is_covered(&simulation, mykingrow, mykingfile,
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diff changeset
238 opponent_color(piececolor))) {
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diff changeset
239 return 0;
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diff changeset
240 }
19
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241
25
3ab0c2e1a4e2 implemented king
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diff changeset
242 /* correct check and checkmate flags (move is still valid) */
29
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
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diff changeset
243 Move threats[16];
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diff changeset
244 uint8_t threatcount;
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diff changeset
245 move->check = get_threats(&simulation, opkingrow, opkingfile,
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diff changeset
246 piececolor, threats, &threatcount);
19
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247
28
0c1371488d87 NEED TESTING: implemented check and checkmate - TODO: avoid checkmate by moving another piece in between
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diff changeset
248 if (move->check) {
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diff changeset
249 /* determine possible escape fields */
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diff changeset
250 _Bool canescape = 0;
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diff changeset
251 for (int dr = -1 ; dr <= 1 && !canescape ; dr++) {
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diff changeset
252 for (int df = -1 ; df <= 1 && !canescape ; df++) {
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diff changeset
253 if (!(dr == 0 && df == 0) &&
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parents: 27
diff changeset
254 isidx(opkingrow + dr) && isidx(opkingfile + df)) {
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diff changeset
255
0c1371488d87 NEED TESTING: implemented check and checkmate - TODO: avoid checkmate by moving another piece in between
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diff changeset
256 /* escape field neither blocked nor covered */
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diff changeset
257 if ((simulation.board[opkingrow + dr][opkingfile + df]
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diff changeset
258 & COLOR_MASK) != opponent_color(piececolor)) {
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diff changeset
259 canescape |= !is_covered(&simulation,
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diff changeset
260 opkingrow + dr, opkingfile + df, piececolor);
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diff changeset
261 }
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diff changeset
262 }
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diff changeset
263 }
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diff changeset
264 }
29
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diff changeset
265 /* can't escape, can he capture? */
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diff changeset
266 if (!canescape && threatcount == 1) {
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diff changeset
267 canescape = is_attacked(&simulation, threats[0].fromrow,
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diff changeset
268 threats[0].fromfile, opponent_color(piececolor));
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diff changeset
269 }
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diff changeset
270
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diff changeset
271 /* can't capture, can he block? */
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diff changeset
272 if (!canescape && threatcount == 1) {
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diff changeset
273 Move *threat = &(threats[0]);
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diff changeset
274 uint8_t threatpiece = threat->piece & PIECE_MASK;
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diff changeset
275
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diff changeset
276 /* knight, pawns and the king cannot be blocked */
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diff changeset
277 if (threatpiece == BISHOP || threatpiece == ROOK
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diff changeset
278 || threatpiece == QUEEN) {
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diff changeset
279 if (threat->fromrow == threat->torow) {
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diff changeset
280 /* rook aspect (on row) */
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diff changeset
281 int d = threat->tofile > threat->fromfile ? 1 : -1;
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diff changeset
282 uint8_t file = threat->fromfile;
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diff changeset
283 while (!canescape && file != threat->tofile - d) {
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diff changeset
284 file += d;
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diff changeset
285 canescape |= is_protected(&simulation,
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diff changeset
286 threat->torow, file, opponent_color(piececolor));
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diff changeset
287 }
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diff changeset
288 } else if (threat->fromfile == threat->tofile) {
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diff changeset
289 /* rook aspect (on file) */
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diff changeset
290 int d = threat->torow > threat->fromrow ? 1 : -1;
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diff changeset
291 uint8_t row = threat->fromrow;
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diff changeset
292 while (!canescape && row != threat->torow - d) {
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diff changeset
293 row += d;
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diff changeset
294 canescape |= is_protected(&simulation,
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diff changeset
295 row, threat->tofile, opponent_color(piececolor));
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diff changeset
296 }
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
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parents: 28
diff changeset
297 } else {
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diff changeset
298 /* bishop aspect */
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parents: 28
diff changeset
299 int dr = move->torow > move->fromrow ? 1 : -1;
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diff changeset
300 int df = move->tofile > move->fromfile ? 1 : -1;
28
0c1371488d87 NEED TESTING: implemented check and checkmate - TODO: avoid checkmate by moving another piece in between
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diff changeset
301
29
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diff changeset
302 uint8_t row = move->fromrow;
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diff changeset
303 uint8_t file = move->fromfile;
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diff changeset
304 while (!canescape && file != move->tofile - df
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parents: 28
diff changeset
305 && row != move->torow - dr) {
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diff changeset
306 row += dr;
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diff changeset
307 file += df;
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
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diff changeset
308 canescape |= is_protected(&simulation, row, file,
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diff changeset
309 opponent_color(piececolor));
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diff changeset
310 }
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diff changeset
311 }
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diff changeset
312 }
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diff changeset
313 }
28
0c1371488d87 NEED TESTING: implemented check and checkmate - TODO: avoid checkmate by moving another piece in between
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parents: 27
diff changeset
314
29
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parents: 28
diff changeset
315 if (!canescape) {
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diff changeset
316 gamestate->checkmate = 1;
28
0c1371488d87 NEED TESTING: implemented check and checkmate - TODO: avoid checkmate by moving another piece in between
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diff changeset
317 }
0c1371488d87 NEED TESTING: implemented check and checkmate - TODO: avoid checkmate by moving another piece in between
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diff changeset
318 }
0c1371488d87 NEED TESTING: implemented check and checkmate - TODO: avoid checkmate by moving another piece in between
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diff changeset
319
0c1371488d87 NEED TESTING: implemented check and checkmate - TODO: avoid checkmate by moving another piece in between
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diff changeset
320 return 1;
19
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321 }
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322
23
824c9522ce66 introduced game state structure
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diff changeset
323 int eval_move(GameState *gamestate, char *mstr, Move *move) {
19
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parents:
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324 memset(move, 0, sizeof(Move));
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325 move->fromfile = POS_UNSPECIFIED;
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326 move->fromrow = POS_UNSPECIFIED;
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327
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328 size_t len = strlen(mstr);
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329
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330 /* evaluate check/checkmate flags */
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diff changeset
331 if (mstr[len-1] == '+') {
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diff changeset
332 len--; mstr[len] = '\0';
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333 move->check = 1;
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334 } else if (mstr[len-1] == '#') {
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parents:
diff changeset
335 len--; mstr[len] = '\0';
27
efeb98bc69c9 moved checkmate and stalemate flags to gamestate
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parents: 25
diff changeset
336 /* ignore - validation should set game state */
19
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parents:
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337 }
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parents:
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338
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parents:
diff changeset
339 /* evaluate promotion */
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parents:
diff changeset
340 if (len > 3 && mstr[len-2] == '=') {
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diff changeset
341 move->promotion = getpiece(mstr[len-1]);
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parents:
diff changeset
342 if (!move->promotion) {
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diff changeset
343 return INVALID_MOVE_SYNTAX;
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diff changeset
344 } else {
23
824c9522ce66 introduced game state structure
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diff changeset
345 move->promotion |= gamestate->mycolor;
19
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346 len -= 2;
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diff changeset
347 mstr[len] = 0;
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diff changeset
348 }
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diff changeset
349 }
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parents:
diff changeset
350
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diff changeset
351 if (len == 2) {
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parents:
diff changeset
352 /* pawn move (e.g. "e4") */
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diff changeset
353 move->piece = PAWN;
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diff changeset
354 move->tofile = fileidx(mstr[0]);
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parents:
diff changeset
355 move->torow = rowidx(mstr[1]);
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parents:
diff changeset
356 } else if (len == 3) {
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parents:
diff changeset
357 if (strcmp(mstr, "O-O") == 0) {
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parents:
diff changeset
358 /* king side castling */
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parents:
diff changeset
359 move->piece = KING;
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parents:
diff changeset
360 move->fromfile = fileidx('e');
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parents:
diff changeset
361 move->tofile = fileidx('g');
23
824c9522ce66 introduced game state structure
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parents: 21
diff changeset
362 move->fromrow = move->torow = gamestate->mycolor == WHITE ? 0 : 7;
19
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parents:
diff changeset
363 } else {
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parents:
diff changeset
364 /* move (e.g. "Nf3") */
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parents:
diff changeset
365 move->piece = getpiece(mstr[0]);
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diff changeset
366 move->tofile = fileidx(mstr[1]);
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diff changeset
367 move->torow = rowidx(mstr[2]);
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368 }
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parents:
diff changeset
369
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diff changeset
370 } else if (len == 4) {
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parents:
diff changeset
371 move->piece = getpiece(mstr[0]);
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parents:
diff changeset
372 if (!move->piece) {
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diff changeset
373 move->piece = PAWN;
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374 move->fromfile = fileidx(mstr[0]);
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parents:
diff changeset
375 }
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parents:
diff changeset
376 if (mstr[1] == 'x') {
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parents:
diff changeset
377 /* capture (e.g. "Nxf3", "dxe5") */
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parents:
diff changeset
378 move->capture = 1;
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parents:
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379 } else {
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parents:
diff changeset
380 /* move (e.g. "Ndf3", "N2c3", "e2e4") */
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parents:
diff changeset
381 if (isfile(mstr[1])) {
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parents:
diff changeset
382 move->fromfile = fileidx(mstr[1]);
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parents:
diff changeset
383 if (move->piece == PAWN) {
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parents:
diff changeset
384 move->piece = 0;
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parents:
diff changeset
385 }
6a26114297a1 moved chess rules to separate lib
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parents:
diff changeset
386 } else {
6a26114297a1 moved chess rules to separate lib
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parents:
diff changeset
387 move->fromrow = rowidx(mstr[1]);
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parents:
diff changeset
388 }
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
389 }
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parents:
diff changeset
390 move->tofile = fileidx(mstr[2]);
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parents:
diff changeset
391 move->torow = rowidx(mstr[3]);
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parents:
diff changeset
392 } else if (len == 5) {
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parents:
diff changeset
393 if (strcmp(mstr, "O-O-O") == 0) {
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
394 /* queen side castling "O-O-O" */
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parents:
diff changeset
395 move->piece = KING;
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parents:
diff changeset
396 move->fromfile = fileidx('e');
6a26114297a1 moved chess rules to separate lib
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parents:
diff changeset
397 move->tofile = fileidx('c');
23
824c9522ce66 introduced game state structure
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parents: 21
diff changeset
398 move->fromrow = move->torow = gamestate->mycolor == WHITE ? 0 : 7;
19
6a26114297a1 moved chess rules to separate lib
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parents:
diff changeset
399 } else {
6a26114297a1 moved chess rules to separate lib
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parents:
diff changeset
400 move->piece = getpiece(mstr[0]);
6a26114297a1 moved chess rules to separate lib
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parents:
diff changeset
401 if (mstr[2] == 'x') {
6a26114297a1 moved chess rules to separate lib
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parents:
diff changeset
402 move->capture = 1;
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
403 if (move->piece) {
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
404 /* capture (e.g. "Ndxf3") */
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
405 move->fromfile = fileidx(mstr[1]);
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
406 } else {
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
407 /* long notation capture (e.g. "e5xf6") */
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
408 move->piece = PAWN;
6a26114297a1 moved chess rules to separate lib
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parents:
diff changeset
409 move->fromfile = fileidx(mstr[0]);
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Mike Becker <universe@uap-core.de>
parents:
diff changeset
410 move->fromrow = rowidx(mstr[1]);
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Mike Becker <universe@uap-core.de>
parents:
diff changeset
411 }
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
412 } else {
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
413 /* long notation move (e.g. "Nc5a4") */
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parents:
diff changeset
414 move->fromfile = fileidx(mstr[1]);
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parents:
diff changeset
415 move->fromrow = rowidx(mstr[2]);
6a26114297a1 moved chess rules to separate lib
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parents:
diff changeset
416 }
6a26114297a1 moved chess rules to separate lib
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parents:
diff changeset
417 move->tofile = fileidx(mstr[3]);
6a26114297a1 moved chess rules to separate lib
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parents:
diff changeset
418 move->torow = rowidx(mstr[4]);
6a26114297a1 moved chess rules to separate lib
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parents:
diff changeset
419 }
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
420 } else if (len == 6) {
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
421 /* long notation capture (e.g. "Nc5xf3") */
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
422 if (mstr[3] == 'x') {
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
423 move->capture = 1;
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
424 move->piece = getpiece(mstr[0]);
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
425 move->fromfile = fileidx(mstr[1]);
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
426 move->fromrow = rowidx(mstr[2]);
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
427 move->tofile = fileidx(mstr[4]);
6a26114297a1 moved chess rules to separate lib
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parents:
diff changeset
428 move->torow = rowidx(mstr[5]);
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
429 }
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
430 }
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
431
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
432
6a26114297a1 moved chess rules to separate lib
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parents:
diff changeset
433 if (move->piece) {
23
824c9522ce66 introduced game state structure
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parents: 21
diff changeset
434 if (move->piece == PAWN
824c9522ce66 introduced game state structure
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parents: 21
diff changeset
435 && move->torow == (gamestate->mycolor==WHITE?7:0)
19
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
436 && !move->promotion) {
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
437 return NEED_PROMOTION;
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
438 }
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
439
23
824c9522ce66 introduced game state structure
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parents: 21
diff changeset
440 move->piece |= gamestate->mycolor;
19
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
441 if (move->fromfile == POS_UNSPECIFIED
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
442 || move->fromrow == POS_UNSPECIFIED) {
23
824c9522ce66 introduced game state structure
Mike Becker <universe@uap-core.de>
parents: 21
diff changeset
443 return getlocation(gamestate, move);
19
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
444 } else {
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
445 return chkidx(move) ? VALID_MOVE_SYNTAX : INVALID_POSITION;
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
446 }
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
447 } else {
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
448 return INVALID_MOVE_SYNTAX;
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
449 }
6a26114297a1 moved chess rules to separate lib
Mike Becker <universe@uap-core.de>
parents:
diff changeset
450 }
29
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
451
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
452 _Bool get_threats(GameState *gamestate, uint8_t row, uint8_t file,
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
453 uint8_t color, Move *threats, uint8_t *threatcount) {
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
454 Move candidates[16];
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
455 int candidatecount = 0;
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
456 for (uint8_t r = 0 ; r < 8 ; r++) {
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
457 for (uint8_t f = 0 ; f < 8 ; f++) {
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
458 if ((gamestate->board[r][f] & COLOR_MASK) == color) {
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
459 memset(&(candidates[candidatecount]), 0, sizeof(Move));
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
460 candidates[candidatecount].piece = gamestate->board[r][f];
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
461 candidates[candidatecount].fromrow = r;
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
462 candidates[candidatecount].fromfile = f;
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
463 candidates[candidatecount].torow = row;
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
464 candidates[candidatecount].tofile = file;
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
465 candidatecount++;
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
466 }
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
467 }
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
468 }
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
469
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
470 if (threatcount) {
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
471 *threatcount = 0;
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
472 }
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
473
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
474
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
475 _Bool result = 0;
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
476
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
477 for (int i = 0 ; i < candidatecount ; i++) {
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
478 if (validate_move_rules(gamestate, &(candidates[i]))) {
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
479 result = 1;
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
480 if (threats && threatcount) {
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
481 threats[(*threatcount)++] = candidates[i];
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
482 }
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
483 }
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
484 }
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
485
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
486 return result;
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
487 }
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
488
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
489 _Bool get_real_threats(GameState *gamestate, uint8_t row, uint8_t file,
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
490 uint8_t color, Move *threats, uint8_t *threatcount) {
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
491
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
492 Move candidates[16];
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
493 uint8_t candidatecount;
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
494 if (get_threats(gamestate, row, file, color, candidates, &candidatecount)) {
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
495
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
496 if (threatcount) {
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
497 *threatcount = 0;
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
498 }
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
499 _Bool result = 0;
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
500 uint8_t kingfile = 0, kingrow = 0;
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
501 for (uint8_t row = 0 ; row < 8 ; row++) {
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
502 for (uint8_t file = 0 ; file < 8 ; file++) {
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
503 if ((gamestate->board[row][file] & COLOR_MASK) == color) {
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
504 kingfile = file;
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
505 kingrow = row;
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
506 }
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
507 }
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
508 }
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
509
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
510 for (uint8_t i = 0 ; i < candidatecount ; i++) {
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
511 GameState simulation;
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
512 memcpy(&simulation, gamestate, sizeof(GameState));
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
513 apply_move(&simulation, &(candidates[i]));
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
514 if (!is_covered(&simulation, kingrow, kingfile,
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
515 opponent_color(color))) {
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
516 result = 1;
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
517 if (threats && threatcount) {
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
518 threats[(*threatcount)++] = candidates[i];
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
519 }
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
520 }
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
521 }
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
522
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
523 return result;
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
524 } else {
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
525 return 0;
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
526 }
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
527 }
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
528
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
529 _Bool is_protected(GameState *gamestate, uint8_t row, uint8_t file,
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
530 uint8_t color) {
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
531
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
532 Move threats[16];
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
533 uint8_t threatcount;
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
534 if (get_real_threats(gamestate, row, file, color, threats, &threatcount)) {
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
535 for (int i = 0 ; i < threatcount ; i++) {
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
536 if (threats[i].piece != (color|KING)) {
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
537 return 1;
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
538 }
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
539 }
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
540 return 0;
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
541 } else {
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
542 return 0;
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
543 }
c6a1ad6cf749 fixed checkmate and completed implementation (more testing is still advised)
Mike Becker <universe@uap-core.de>
parents: 28
diff changeset
544 }
33
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
545
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
546 uint16_t remaining_movetime(GameInfo *gameinfo, GameState *gamestate,
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
547 uint8_t color) {
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
548 if (!gameinfo->timecontrol) {
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
549 return 0;
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
550 }
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
551
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
552 if (gamestate->movelist) {
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
553 uint16_t time = gameinfo->time;
36
ebe0c961e9a6 reduced awesome great nanosecond precision so we can compile on OS X
Mike Becker <universe@uap-core.de>
parents: 33
diff changeset
554 suseconds_t micros = 0;
33
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
555
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
556 MoveList *movelist = color == WHITE ?
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
557 gamestate->movelist : gamestate->movelist->next;
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
558
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
559 while (movelist) {
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
560 time += gameinfo->addtime;
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
561
36
ebe0c961e9a6 reduced awesome great nanosecond precision so we can compile on OS X
Mike Becker <universe@uap-core.de>
parents: 33
diff changeset
562 struct timeval *movetime = &(movelist->move.movetime);
33
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
563 if (movetime->tv_sec >= time) {
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
564 return 0;
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
565 }
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
566
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
567 time -= movetime->tv_sec;
36
ebe0c961e9a6 reduced awesome great nanosecond precision so we can compile on OS X
Mike Becker <universe@uap-core.de>
parents: 33
diff changeset
568 micros += movetime->tv_usec;
33
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
569
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
570 movelist = movelist->next ? movelist->next->next : NULL;
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
571 }
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
572
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
573 time_t sec;
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
574 movelist = gamestate->lastmove;
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
575 if ((movelist->move.piece & COLOR_MASK) != color) {
36
ebe0c961e9a6 reduced awesome great nanosecond precision so we can compile on OS X
Mike Becker <universe@uap-core.de>
parents: 33
diff changeset
576 struct timeval *lastmovetstamp = &(movelist->move.timestamp);
ebe0c961e9a6 reduced awesome great nanosecond precision so we can compile on OS X
Mike Becker <universe@uap-core.de>
parents: 33
diff changeset
577 struct timeval currenttstamp;
ebe0c961e9a6 reduced awesome great nanosecond precision so we can compile on OS X
Mike Becker <universe@uap-core.de>
parents: 33
diff changeset
578 gettimeofday(&currenttstamp, NULL);
ebe0c961e9a6 reduced awesome great nanosecond precision so we can compile on OS X
Mike Becker <universe@uap-core.de>
parents: 33
diff changeset
579 micros += currenttstamp.tv_usec - lastmovetstamp->tv_usec;
33
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
580 sec = currenttstamp.tv_sec - lastmovetstamp->tv_sec;
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
581 if (sec >= time) {
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
582 return 0;
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
583 }
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
584
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
585 time -= sec;
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
586 }
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
587
36
ebe0c961e9a6 reduced awesome great nanosecond precision so we can compile on OS X
Mike Becker <universe@uap-core.de>
parents: 33
diff changeset
588 sec = micros / 1e6L;
33
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
589
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
590 if (sec >= time) {
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
591 return 0;
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
592 }
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
593
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
594 time -= sec;
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
595
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
596 return time;
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
597 } else {
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
598 return gameinfo->time;
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
599 }
866025982aa9 implemented time control
Mike Becker <universe@uap-core.de>
parents: 29
diff changeset
600 }

mercurial