Mercurial > hg > terminal-chess / file comparison
comparison: src/chess/pawn.c
src/chess/pawn.c
- changeset 80
- b980a7192b5a
- parent 55
- 54ea19938d57
equal
deleted
inserted
replaced
| 79:ffd452cf05ff | 80:b980a7192b5a |
|---|---|
| 28 */ | 28 */ |
| 29 | 29 |
| 30 #include "pawn.h" | 30 #include "pawn.h" |
| 31 #include "rules.h" | 31 #include "rules.h" |
| 32 | 32 |
| 33 _Bool pawn_chkrules(GameState *gamestate, Move *move) { | 33 bool pawn_chkrules(GameState *gamestate, Move *move) { |
| 34 int8_t d = ((move->piece & COLOR_MASK) == WHITE ? -1 : 1); | 34 int8_t d = ((move->piece & COLOR_MASK) == WHITE ? -1 : 1); |
| 35 | 35 |
| 36 if (move->torow == (d < 0 ? 7 : 0)) { | 36 if (move->torow == (d < 0 ? 7 : 0)) { |
| 37 if (move->promotion) { | 37 if (move->promotion) { |
| 38 uint8_t promopiece = move->promotion & PIECE_MASK; | 38 uint8_t promopiece = move->promotion & PIECE_MASK; |
| 39 if (!promopiece || promopiece == PAWN || promopiece == KING) { | 39 if (!promopiece || promopiece == PAWN || promopiece == KING) { |
| 40 return 0; | 40 return false; |
| 41 } | 41 } |
| 42 } else { | 42 } else { |
| 43 return 0; | 43 return false; |
| 44 } | 44 } |
| 45 } else { | 45 } else { |
| 46 if (move->promotion) { | 46 if (move->promotion) { |
| 47 return 0; | 47 return false; |
| 48 } | 48 } |
| 49 } | 49 } |
| 50 | 50 |
| 51 if (move->capture) { | 51 if (move->capture) { |
| 52 if (move->fromrow == move->torow + d && ( | 52 if (move->fromrow == move->torow + d && ( |
| 55 | 55 |
| 56 return mdst(gamestate->board, move) || | 56 return mdst(gamestate->board, move) || |
| 57 (gamestate->board[move->fromrow][move->tofile] | 57 (gamestate->board[move->fromrow][move->tofile] |
| 58 & ENPASSANT_THREAT); | 58 & ENPASSANT_THREAT); |
| 59 } else { | 59 } else { |
| 60 return 0; | 60 return false; |
| 61 } | 61 } |
| 62 } else { | 62 } else { |
| 63 if (move->fromfile == move->tofile) { | 63 if (move->fromfile == move->tofile) { |
| 64 return (move->fromrow == move->torow + d) || | 64 return (move->fromrow == move->torow + d) || |
| 65 (move->fromrow == (d < 0 ? 1 : 6) && /* advanced first move */ | 65 (move->fromrow == (d < 0 ? 1 : 6) && /* advanced first move */ |
| 66 move->fromrow == move->torow + d*2); | 66 move->fromrow == move->torow + d*2); |
| 67 } else { | 67 } else { |
| 68 return 0; | 68 return false; |
| 69 } | 69 } |
| 70 } | 70 } |
| 71 } | 71 } |
| 72 | 72 |
| 73 _Bool pawn_isblocked(GameState *gamestate, Move *move) { | 73 bool pawn_isblocked(GameState *gamestate, Move *move) { |
| 74 if (move->torow == move->fromrow + 1 || move->torow == move->fromrow - 1) { | 74 if (move->torow == move->fromrow + 1 || move->torow == move->fromrow - 1) { |
| 75 return mdst(gamestate->board, move) && !move->capture; | 75 return mdst(gamestate->board, move) && !move->capture; |
| 76 } else { | 76 } else { |
| 77 return mdst(gamestate->board, move) || | 77 return mdst(gamestate->board, move) || |
| 78 gamestate->board[(move->fromrow+move->torow)/2][move->tofile]; | 78 gamestate->board[(move->fromrow+move->torow)/2][move->tofile]; |
