Mercurial > hg > terminal-chess / file comparison
comparison: src/chess/king.c
src/chess/king.c
- changeset 161
- 3ff96fec144a
- parent 98
- 9cb41383540f
- child 163
- 2a6d83f4677e
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replaced
| 160:f87832cba8b8 | 161:3ff96fec144a |
|---|---|
| 27 * | 27 * |
| 28 */ | 28 */ |
| 29 | 29 |
| 30 #include "rules.h" | 30 #include "rules.h" |
| 31 #include "king.h" | 31 #include "king.h" |
| 32 #include <stdlib.h> | |
| 33 | 32 |
| 34 static bool king_castling_chkmoved(GameState *gamestate, | 33 #include <string.h> |
| 35 uint8_t row, uint8_t file) { | |
| 36 | 34 |
| 35 static bool king_castling_chkmoved(GameState *gamestate, Row row, File file) { | |
| 37 for (unsigned i = 0; i < gamestate->movecount; i++) { | 36 for (unsigned i = 0; i < gamestate->movecount; i++) { |
| 38 if (gamestate->moves[i].fromfile == file | 37 if (gamestate->moves[i].fromfile == file |
| 39 && gamestate->moves[i].fromrow == row) { | 38 && gamestate->moves[i].fromrow == row) { |
| 40 return true; | 39 return true; |
| 41 } | 40 } |
| 49 abs(move->tofile - move->fromfile) <= 1) { | 48 abs(move->tofile - move->fromfile) <= 1) { |
| 50 return true; | 49 return true; |
| 51 } else { | 50 } else { |
| 52 /* castling */ | 51 /* castling */ |
| 53 if (move->fromrow == move->torow && | 52 if (move->fromrow == move->torow && |
| 54 move->fromrow == ((move->piece&COLOR_MASK) == WHITE ? 0 : 7) && | 53 move->fromrow == (piece_color(move->piece) == WHITE ? 0 : 7) && |
| 55 move->fromfile == fileidx('e') && | 54 move->fromfile == fileidx('e') && |
| 56 (move->tofile == fileidx('c') || move->tofile == fileidx('g'))) { | 55 (move->tofile == fileidx('c') || move->tofile == fileidx('g'))) { |
| 57 | 56 |
| 58 return !king_castling_chkmoved(gamestate, | 57 return !king_castling_chkmoved(gamestate, |
| 59 move->fromrow, move->fromfile) && | 58 move->fromrow, move->fromfile) && |
| 65 } | 64 } |
| 66 } | 65 } |
| 67 | 66 |
| 68 bool king_isblocked(GameState *gamestate, Move *move) { | 67 bool king_isblocked(GameState *gamestate, Move *move) { |
| 69 | 68 |
| 70 uint8_t opponent_color = opponent_color(move->piece&COLOR_MASK); | 69 uint8_t opponent_color = opponent_color(piece_color(move->piece)); |
| 71 | 70 |
| 72 /* being in check does not "block" the king, so don't test it here */ | 71 /* being in check does not "block" the king, so don't test it here */ |
| 73 bool blocked = false; | 72 bool blocked = false; |
| 74 | 73 |
| 75 /* just test, if castling move is blocked */ | 74 /* just test, if castling move is blocked */ |
| 76 if (abs(move->tofile - move->fromfile) == 2) { | 75 if (abs(move->tofile - move->fromfile) == 2) { |
| 77 if (move->tofile == fileidx('c')) { | 76 if (move->tofile == fileidx('c')) { |
| 78 blocked |= gamestate->board[move->torow][fileidx('b')]; | 77 blocked |= gamestate->board[move->torow][fileidx('b')]; |
| 79 } | 78 } |
| 80 uint8_t midfile = (move->tofile+move->fromfile)/2; | 79 uint8_t midfile = (move->tofile+move->fromfile)/2; |
| 81 blocked |= last_move(gamestate).check || | 80 bool incheck = false; |
| 82 gamestate->board[move->torow][midfile] || | 81 if (gamestate->movecount > 0) { |
| 82 incheck = gamestate->moves[gamestate->movecount-1].check; | |
| 83 } | |
| 84 blocked |= incheck || gamestate->board[move->torow][midfile] || | |
| 83 is_covered(gamestate, move->torow, midfile, opponent_color); | 85 is_covered(gamestate, move->torow, midfile, opponent_color); |
| 84 } | 86 } |
| 85 | 87 |
| 86 return blocked; | 88 return blocked; |
| 87 } | 89 } |
