Mercurial > hg > terminal-chess / file comparison
comparison: src/rules/pawn.c
src/rules/pawn.c
- changeset 16
- a298c6637c30
- parent 15
- 7ffd66591afe
- child 18
- 6008840b859e
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| 15:7ffd66591afe | 16:a298c6637c30 |
|---|---|
| 26 * POSSIBILITY OF SUCH DAMAGE. | 26 * POSSIBILITY OF SUCH DAMAGE. |
| 27 * | 27 * |
| 28 */ | 28 */ |
| 29 | 29 |
| 30 #include "pawn.h" | 30 #include "pawn.h" |
| 31 #include "rules.h" | |
| 31 | 32 |
| 32 _Bool pawn_chkrules(Board board, Move *move) { | 33 _Bool pawn_chkrules(Board board, Move *move) { |
| 33 int8_t d = ((move->piece & COLOR_MASK) == WHITE ? -1 : 1); | 34 int8_t d = ((move->piece & COLOR_MASK) == WHITE ? -1 : 1); |
| 34 if (move->capture) { | 35 if (move->capture) { |
| 35 if (move->fromrow == move->torow + d && ( | 36 if (move->fromrow == move->torow + d && ( |
| 54 | 55 |
| 55 _Bool pawn_isblocked(Board board, Move *move) { | 56 _Bool pawn_isblocked(Board board, Move *move) { |
| 56 return mdst(board,move) && !move->capture; | 57 return mdst(board,move) && !move->capture; |
| 57 } | 58 } |
| 58 | 59 |
| 59 _Bool pawn_getlocation(Board board, Move *move) { | 60 int pawn_getlocation(Board board, Move *move) { |
| 60 int8_t d = ((move->piece & COLOR_MASK) == WHITE ? -1 : 1); | 61 int8_t d = ((move->piece & COLOR_MASK) == WHITE ? -1 : 1); |
| 61 | 62 |
| 62 if (move->fromfile == POS_UNSPECIFIED) { | 63 if (move->fromfile == POS_UNSPECIFIED) { |
| 63 move->fromfile = move->tofile; | 64 move->fromfile = move->tofile; |
| 64 } | 65 } |
| 65 move->fromrow = move->torow + d; | 66 move->fromrow = move->torow + d; |
| 66 if (move->fromrow > 6) { | 67 if (move->fromrow > 6) { |
| 67 return FALSE; | 68 return INVALID_POSITION; |
| 68 } else { | 69 } else { |
| 69 /* advanced first move */ | 70 /* advanced first move */ |
| 70 if (move->fromrow == (d < 0 ? 2 : 5) && | 71 if (move->fromrow == (d < 0 ? 2 : 5) && |
| 71 msrc(board,move) != move->piece) { | 72 msrc(board,move) != move->piece) { |
| 72 | 73 |
| 73 move->fromrow += d; | 74 move->fromrow += d; |
| 74 if (move->fromrow > 6) { | 75 if (move->fromrow > 6) { |
| 75 return FALSE; | 76 return INVALID_POSITION; |
| 76 } | 77 } |
| 77 } | 78 } |
| 78 } | 79 } |
| 79 return TRUE; | 80 return VALID_MOVE_SYNTAX; |
| 80 } | 81 } |
