Mercurial > hg > terminal-chess / file comparison
comparison: src/rules/pawn.c
src/rules/pawn.c
- changeset 14
- 970748b9a73b
- parent 12
- 84880c7e1ea6
- child 15
- 7ffd66591afe
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| 13:faec61c4901f | 14:970748b9a73b |
|---|---|
| 28 */ | 28 */ |
| 29 | 29 |
| 30 #include "pawn.h" | 30 #include "pawn.h" |
| 31 | 31 |
| 32 _Bool pawn_chkrules(Board board, Move *move) { | 32 _Bool pawn_chkrules(Board board, Move *move) { |
| 33 // TODO: implement | 33 int8_t d = ((move->piece & COLOR_MASK) == WHITE ? -1 : 1); |
| 34 return TRUE; | 34 if (move->capture) { |
| 35 if (move->fromrow == move->torow + d && ( | |
| 36 move->fromfile == move->tofile + 1 || | |
| 37 move->fromfile == move->tofile - 1)) { | |
| 38 // TODO: en passant | |
| 39 return mdst(board,move) != 0; /* color has been checked */ | |
| 40 } else { | |
| 41 return FALSE; | |
| 42 } | |
| 43 } else { | |
| 44 if (move->fromfile == move->tofile) { | |
| 45 return (move->fromrow == move->torow + d) || | |
| 46 (move->fromrow == (d < 0 ? 1 : 6) && /* advanced first move */ | |
| 47 move->fromrow == move->torow + d*2); | |
| 48 } else { | |
| 49 return FALSE; | |
| 50 } | |
| 51 } | |
| 35 } | 52 } |
| 36 | 53 |
| 37 _Bool pawn_isblocked(Board board, Move *move) { | 54 _Bool pawn_isblocked(Board board, Move *move) { |
| 38 // TODO: implement | 55 return mdst(board,move) && !move->capture; |
| 39 return FALSE; | |
| 40 } | 56 } |
| 41 | 57 |
| 42 _Bool pawn_getlocation(Board board, Move *move) { | 58 _Bool pawn_getlocation(Board board, Move *move) { |
| 43 int8_t d = ((move->piece & COLOR_MASK) == WHITE ? -1 : 1); | 59 int8_t d = ((move->piece & COLOR_MASK) == WHITE ? -1 : 1); |
| 44 | 60 |
| 45 // TODO: battle moves | 61 if (move->fromfile == POS_UNSPECIFIED) { |
| 46 | 62 move->fromfile = move->tofile; |
| 47 move->fromfile = move->tofile; | 63 } |
| 48 move->fromrow = move->torow + d; | 64 move->fromrow = move->torow + d; |
| 49 if (move->fromrow > 6) { | 65 if (move->fromrow > 6) { |
| 50 return FALSE; | 66 return FALSE; |
| 51 } else { | 67 } else { |
| 52 /* advanced first move */ | 68 /* advanced first move */ |
| 53 if (move->fromrow == (d < 0 ? 2 : 5) && | 69 if (move->fromrow == (d < 0 ? 2 : 5) && |
| 54 board[move->fromrow][move->fromfile] != move->piece) { | 70 msrc(board,move) != move->piece) { |
| 55 | 71 |
| 56 move->fromrow += d; | 72 move->fromrow += d; |
| 57 if (move->fromrow > 6) { | 73 if (move->fromrow > 6) { |
| 58 return FALSE; | 74 return FALSE; |
| 59 } | 75 } |
