Mercurial > hg > terminal-chess / file comparison
comparison: src/chess/rules.c
src/chess/rules.c
- changeset 68
- b34de5ce7d0e
- parent 67
- c76e46970a59
- child 69
- c8f2c280cff7
equal
deleted
inserted
replaced
| 67:c76e46970a59 | 68:b34de5ce7d0e |
|---|---|
| 574 } | 574 } |
| 575 | 575 |
| 576 static int getlocation(GameState *gamestate, Move *move) { | 576 static int getlocation(GameState *gamestate, Move *move) { |
| 577 | 577 |
| 578 uint8_t color = move->piece & COLOR_MASK; | 578 uint8_t color = move->piece & COLOR_MASK; |
| 579 uint8_t piece = move->piece & PIECE_MASK; | |
| 579 _Bool incheck = gamestate->lastmove?gamestate->lastmove->move.check:0; | 580 _Bool incheck = gamestate->lastmove?gamestate->lastmove->move.check:0; |
| 580 | 581 |
| 581 Move threats[16], *threat = NULL; | 582 Move threats[16], *threat = NULL; |
| 582 uint8_t threatcount; | 583 uint8_t threatcount; |
| 583 | 584 |
| 586 | 587 |
| 587 int reason = INVALID_POSITION; | 588 int reason = INVALID_POSITION; |
| 588 | 589 |
| 589 /* find threats for the specified position */ | 590 /* find threats for the specified position */ |
| 590 for (uint8_t i = 0 ; i < threatcount ; i++) { | 591 for (uint8_t i = 0 ; i < threatcount ; i++) { |
| 591 if ((threats[i].piece & (PIECE_MASK | COLOR_MASK)) | 592 if ((threats[i].piece & PIECE_MASK) == piece |
| 592 == move->piece && | 593 && (threats[i].piece & COLOR_MASK) == color && |
| 593 (move->fromrow == POS_UNSPECIFIED || | 594 (move->fromrow == POS_UNSPECIFIED || |
| 594 move->fromrow == threats[i].fromrow) && | 595 move->fromrow == threats[i].fromrow) && |
| 595 (move->fromfile == POS_UNSPECIFIED || | 596 (move->fromfile == POS_UNSPECIFIED || |
| 596 move->fromfile == threats[i].fromfile)) { | 597 move->fromfile == threats[i].fromfile)) { |
| 597 | 598 |
| 598 if (threat) { | 599 if (threat) { |
| 599 return AMBIGUOUS_MOVE; | 600 return AMBIGUOUS_MOVE; |
| 600 } else { | 601 } else { |
| 601 /* found threat is no real threat */ | 602 /* found threat is no real threat */ |
| 602 if (is_pinned(gamestate, &(threats[i]))) { | 603 if (is_pinned(gamestate, &(threats[i]))) { |
| 603 reason = incheck?KING_IN_CHECK:PIECE_PINNED; | 604 reason = incheck?KING_IN_CHECK: |
| 605 (piece==KING?KING_MOVES_INTO_CHECK:PIECE_PINNED); | |
| 604 } else { | 606 } else { |
| 605 threat = &(threats[i]); | 607 threat = &(threats[i]); |
| 606 } | 608 } |
| 607 } | 609 } |
| 608 } | 610 } |
