Mercurial > hg > terminal-chess / file comparison
comparison: src/game.c
src/game.c
- changeset 15
- 7ffd66591afe
- parent 14
- 970748b9a73b
- child 16
- a298c6637c30
equal
deleted
inserted
replaced
| 14:970748b9a73b | 15:7ffd66591afe |
|---|---|
| 76 * | 76 * |
| 77 * @param board the current board state | 77 * @param board the current board state |
| 78 * @param move the move to apply | 78 * @param move the move to apply |
| 79 */ | 79 */ |
| 80 static void apply_move(Board board, Move *move) { | 80 static void apply_move(Board board, Move *move) { |
| 81 uint8_t piece = move->piece & PIECE_MASK; | |
| 82 uint8_t color = move->piece & COLOR_MASK; | |
| 83 | |
| 84 /* en passant capture */ | |
| 85 if (move->capture && piece == PAWN && | |
| 86 mdst(board, move) == 0) { | |
| 87 board[move->fromrow][move->tofile] = 0; | |
| 88 } | |
| 89 | |
| 90 /* remove old en passant threats */ | |
| 91 for (uint8_t file = 0 ; file < 8 ; file++) { | |
| 92 board[3][file] &= ~ENPASSANT_THREAT; | |
| 93 board[4][file] &= ~ENPASSANT_THREAT; | |
| 94 } | |
| 95 | |
| 96 /* add new en passant threat */ | |
| 97 if (piece == PAWN && ( | |
| 98 (move->fromrow == 1 && move->torow == 3) || | |
| 99 (move->fromrow == 6 && move->torow == 4))) { | |
| 100 move->piece |= ENPASSANT_THREAT; | |
| 101 } | |
| 102 | |
| 103 /* move (and maybe capture) */ | |
| 81 msrc(board, move) = 0; | 104 msrc(board, move) = 0; |
| 82 // TODO: care for en passant capture | |
| 83 mdst(board, move) = move->piece; | 105 mdst(board, move) = move->piece; |
| 84 | 106 |
| 85 /* castling */ | 107 /* castling */ |
| 86 if ((move->piece & PIECE_MASK) == KING && | 108 if (piece == KING && |
| 87 move->fromfile == fileidx('e')) { | 109 move->fromfile == fileidx('e')) { |
| 88 uint8_t color = move->piece & COLOR_MASK; | |
| 89 | 110 |
| 90 if (move->tofile == fileidx('g')) { | 111 if (move->tofile == fileidx('g')) { |
| 91 board[move->torow][fileidx('h')] = 0; | 112 board[move->torow][fileidx('h')] = 0; |
| 92 board[move->torow][fileidx('f')] = color|ROOK; | 113 board[move->torow][fileidx('f')] = color|ROOK; |
| 93 } else if (move->tofile == fileidx('c')) { | 114 } else if (move->tofile == fileidx('c')) { |
| 243 move->torow = rowidx(mstr[2]); | 264 move->torow = rowidx(mstr[2]); |
| 244 } | 265 } |
| 245 | 266 |
| 246 } else if (len == 4) { | 267 } else if (len == 4) { |
| 247 move->piece = getpiece(mstr[0]); | 268 move->piece = getpiece(mstr[0]); |
| 269 if (!move->piece) { | |
| 270 move->piece = PAWN; | |
| 271 move->fromfile = fileidx(mstr[0]); | |
| 272 } | |
| 248 if (mstr[1] == 'x') { | 273 if (mstr[1] == 'x') { |
| 249 /* capture (e.g. "Nxf3", "dxe5") */ | 274 /* capture (e.g. "Nxf3", "dxe5") */ |
| 250 move->capture = TRUE; | 275 move->capture = TRUE; |
| 251 if (!move->piece) { | 276 } else { |
| 252 move->piece = PAWN; | 277 /* move (e.g. "Ndf3", "N2c3", "e2e4") */ |
| 253 move->fromfile = fileidx(mstr[0]); | 278 if (isfile(mstr[1])) { |
| 279 move->fromfile = fileidx(mstr[1]); | |
| 280 if (move->piece == PAWN) { | |
| 281 move->piece = 0; | |
| 282 } | |
| 283 } else { | |
| 284 move->fromrow = rowidx(mstr[1]); | |
| 254 } | 285 } |
| 255 } else { | |
| 256 /* move (e.g. "Ndf3", "N2c3") */ | |
| 257 move->fromfile = isfile(mstr[1]) ? | |
| 258 fileidx(mstr[1]) : rowidx(mstr[1]); | |
| 259 } | 286 } |
| 260 move->tofile = fileidx(mstr[2]); | 287 move->tofile = fileidx(mstr[2]); |
| 261 move->torow = rowidx(mstr[3]); | 288 move->torow = rowidx(mstr[3]); |
| 262 } else if (len == 5) { | 289 } else if (len == 5) { |
| 263 if (strcmp(mstr, "O-O-O") == 0) { | 290 if (strcmp(mstr, "O-O-O") == 0) { |
