Mercurial > hg > terminal-chess / file comparison
comparison: src/chess/king.c
src/chess/king.c
- changeset 163
- 2a6d83f4677e
- parent 161
- 3ff96fec144a
equal
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| 162:f0fc70b6f8f9 | 163:2a6d83f4677e |
|---|---|
| 30 #include "rules.h" | 30 #include "rules.h" |
| 31 #include "king.h" | 31 #include "king.h" |
| 32 | 32 |
| 33 #include <string.h> | 33 #include <string.h> |
| 34 | 34 |
| 35 static bool king_castling_chkmoved(GameState *gamestate, Row row, File file) { | 35 static bool king_castling_chkmoved( |
| 36 const GameState *gamestate, Row row, File file) { | |
| 37 | |
| 36 for (unsigned i = 0; i < gamestate->movecount; i++) { | 38 for (unsigned i = 0; i < gamestate->movecount; i++) { |
| 37 if (gamestate->moves[i].fromfile == file | 39 if (gamestate->moves[i].fromfile == file |
| 38 && gamestate->moves[i].fromrow == row) { | 40 && gamestate->moves[i].fromrow == row) { |
| 39 return true; | 41 return true; |
| 40 } | 42 } |
| 41 } | 43 } |
| 42 | 44 |
| 43 return false; | 45 return false; |
| 44 } | 46 } |
| 45 | 47 |
| 46 bool king_chkrules(GameState *gamestate, Move* move) { | 48 bool king_chkrules(const GameState *gamestate, const Move* move) { |
| 47 if (abs(move->torow - move->fromrow) <= 1 && | 49 if (abs(move->torow - move->fromrow) <= 1 && |
| 48 abs(move->tofile - move->fromfile) <= 1) { | 50 abs(move->tofile - move->fromfile) <= 1) { |
| 49 return true; | 51 return true; |
| 50 } else { | 52 } else { |
| 51 /* castling */ | 53 /* castling */ |
| 62 return false; | 64 return false; |
| 63 } | 65 } |
| 64 } | 66 } |
| 65 } | 67 } |
| 66 | 68 |
| 67 bool king_isblocked(GameState *gamestate, Move *move) { | 69 bool king_isblocked(const GameState *gamestate, const Move *move) { |
| 68 | 70 |
| 69 uint8_t opponent_color = opponent_color(piece_color(move->piece)); | 71 uint8_t opponent_color = opponent_color(piece_color(move->piece)); |
| 70 | 72 |
| 71 /* being in check does not "block" the king, so don't test it here */ | 73 /* being in check does not "block" the king, so don't test it here */ |
| 72 bool blocked = false; | 74 bool blocked = false; |
| 77 blocked |= gamestate->board[move->torow][fileidx('b')]; | 79 blocked |= gamestate->board[move->torow][fileidx('b')]; |
| 78 } | 80 } |
| 79 uint8_t midfile = (move->tofile+move->fromfile)/2; | 81 uint8_t midfile = (move->tofile+move->fromfile)/2; |
| 80 bool incheck = false; | 82 bool incheck = false; |
| 81 if (gamestate->movecount > 0) { | 83 if (gamestate->movecount > 0) { |
| 82 incheck = gamestate->moves[gamestate->movecount-1].check; | 84 incheck = is_check_position(gamestate); |
| 83 } | 85 } |
| 84 blocked |= incheck || gamestate->board[move->torow][midfile] || | 86 blocked |= incheck || gamestate->board[move->torow][midfile] || |
| 85 is_covered(gamestate, move->torow, midfile, opponent_color); | 87 is_covered(gamestate, move->torow, midfile, opponent_color); |
| 86 } | 88 } |
| 87 | 89 |
