Mercurial > hg > terminal-chess / file comparison
comparison: src/chess/king.c
src/chess/king.c
- changeset 47
- d726e4b46c33
- parent 25
- 3ab0c2e1a4e2
- child 55
- 54ea19938d57
equal
deleted
inserted
replaced
| 46:4dcfb4c58b6d | 47:d726e4b46c33 |
|---|---|
| 67 } | 67 } |
| 68 | 68 |
| 69 _Bool king_isblocked(GameState *gamestate, Move *move) { | 69 _Bool king_isblocked(GameState *gamestate, Move *move) { |
| 70 | 70 |
| 71 uint8_t opponent_color = opponent_color(move->piece&COLOR_MASK); | 71 uint8_t opponent_color = opponent_color(move->piece&COLOR_MASK); |
| 72 _Bool blocked = is_covered(gamestate, move->torow, move->tofile, | |
| 73 opponent_color); | |
| 74 | 72 |
| 73 // being in check does not "block" the king, so don't test it here | |
| 74 _Bool blocked = 0; | |
| 75 | |
| 76 // just test, if castling move is blocked | |
| 75 if (abs(move->tofile - move->fromfile) == 2) { | 77 if (abs(move->tofile - move->fromfile) == 2) { |
| 76 if (move->tofile == fileidx('c')) { | 78 if (move->tofile == fileidx('c')) { |
| 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; |
| 82 is_covered(gamestate, move->torow, midfile, opponent_color); | 84 is_covered(gamestate, move->torow, midfile, opponent_color); |
| 83 } | 85 } |
| 84 | 86 |
| 85 return blocked; | 87 return blocked; |
| 86 } | 88 } |
| 87 | |
| 88 int king_getlocation(GameState *gamestate, Move *move) { | |
| 89 | |
| 90 uint8_t file, row; | |
| 91 | |
| 92 for (int f = -1 ; f <= 1 ; f++) { | |
| 93 for (int r = -1 ; r <= 1 ; r++) { | |
| 94 if (f == 0 && r == 0) { | |
| 95 continue; | |
| 96 } | |
| 97 file = move->tofile + f; | |
| 98 row = move->torow + r; | |
| 99 if (isidx(file) && isidx(row)) { | |
| 100 if (gamestate->board[row][file] == move->piece) { | |
| 101 if ((move->fromfile != POS_UNSPECIFIED | |
| 102 && move->fromfile != file) || | |
| 103 (move->fromrow != POS_UNSPECIFIED | |
| 104 && move->fromrow != row)) { | |
| 105 return INVALID_POSITION; | |
| 106 } | |
| 107 move->fromfile = file; | |
| 108 move->fromrow = row; | |
| 109 return VALID_MOVE_SYNTAX; | |
| 110 } | |
| 111 } | |
| 112 } | |
| 113 } | |
| 114 | |
| 115 return INVALID_POSITION; | |
| 116 } |
