Mercurial > hg > terminal-chess / file comparison
comparison: src/chess/rules.c
src/chess/rules.c
- changeset 62
- 564af8a16828
- parent 55
- 54ea19938d57
- child 63
- 611332453da0
equal
deleted
inserted
replaced
| 61:e3a1a794351e | 62:564af8a16828 |
|---|---|
| 325 /* cancel processing to save resources */ | 325 /* cancel processing to save resources */ |
| 326 if (result != VALID_MOVE_SEMANTICS) { | 326 if (result != VALID_MOVE_SEMANTICS) { |
| 327 return result; | 327 return result; |
| 328 } | 328 } |
| 329 | 329 |
| 330 /* find kings for check validation */ | |
| 331 uint8_t piececolor = (move->piece & COLOR_MASK); | |
| 332 | |
| 333 uint8_t mykingfile = 0, mykingrow = 0, opkingfile = 0, opkingrow = 0; | |
| 334 for (uint8_t row = 0 ; row < 8 ; row++) { | |
| 335 for (uint8_t file = 0 ; file < 8 ; file++) { | |
| 336 if (gamestate->board[row][file] == | |
| 337 (piececolor == WHITE?WKING:BKING)) { | |
| 338 mykingfile = file; | |
| 339 mykingrow = row; | |
| 340 } else if (gamestate->board[row][file] == | |
| 341 (piececolor == WHITE?BKING:WKING)) { | |
| 342 opkingfile = file; | |
| 343 opkingrow = row; | |
| 344 } | |
| 345 } | |
| 346 } | |
| 347 | |
| 348 /* simulate move for check validation */ | 330 /* simulate move for check validation */ |
| 349 GameState simulation = gamestate_copy_sim(gamestate); | 331 GameState simulation = gamestate_copy_sim(gamestate); |
| 350 Move simmove = *move; | 332 Move simmove = *move; |
| 351 apply_move_impl(&simulation, &simmove, 1); | 333 apply_move_impl(&simulation, &simmove, 1); |
| 334 | |
| 335 /* find kings for check validation */ | |
| 336 uint8_t piececolor = (move->piece & COLOR_MASK); | |
| 337 | |
| 338 uint8_t mykingfile = 0, mykingrow = 0, opkingfile = 0, opkingrow = 0; | |
| 339 for (uint8_t row = 0 ; row < 8 ; row++) { | |
| 340 for (uint8_t file = 0 ; file < 8 ; file++) { | |
| 341 if (simulation.board[row][file] == | |
| 342 (piececolor == WHITE?WKING:BKING)) { | |
| 343 mykingfile = file; | |
| 344 mykingrow = row; | |
| 345 } else if (simulation.board[row][file] == | |
| 346 (piececolor == WHITE?BKING:WKING)) { | |
| 347 opkingfile = file; | |
| 348 opkingrow = row; | |
| 349 } | |
| 350 } | |
| 351 } | |
| 352 | 352 |
| 353 /* don't move into or stay in check position */ | 353 /* don't move into or stay in check position */ |
| 354 if (is_covered(&simulation, mykingrow, mykingfile, | 354 if (is_covered(&simulation, mykingrow, mykingfile, |
| 355 opponent_color(piececolor))) { | 355 opponent_color(piececolor))) { |
| 356 | 356 |
| 493 } | 493 } |
| 494 | 494 |
| 495 _Bool is_pinned(GameState *gamestate, Move *move) { | 495 _Bool is_pinned(GameState *gamestate, Move *move) { |
| 496 uint8_t color = move->piece & COLOR_MASK; | 496 uint8_t color = move->piece & COLOR_MASK; |
| 497 | 497 |
| 498 GameState simulation = gamestate_copy_sim(gamestate); | |
| 499 Move simmove = *move; | |
| 500 apply_move(&simulation, &simmove); | |
| 501 | |
| 498 uint8_t kingfile = 0, kingrow = 0; | 502 uint8_t kingfile = 0, kingrow = 0; |
| 499 for (uint8_t row = 0 ; row < 8 ; row++) { | 503 for (uint8_t row = 0 ; row < 8 ; row++) { |
| 500 for (uint8_t file = 0 ; file < 8 ; file++) { | 504 for (uint8_t file = 0 ; file < 8 ; file++) { |
| 501 if (gamestate->board[row][file] == (color|KING)) { | 505 if (simulation.board[row][file] == (color|KING)) { |
| 502 kingfile = file; | 506 kingfile = file; |
| 503 kingrow = row; | 507 kingrow = row; |
| 504 } | 508 } |
| 505 } | 509 } |
| 506 } | 510 } |
| 507 | 511 |
| 508 GameState simulation = gamestate_copy_sim(gamestate); | |
| 509 Move simmove = *move; | |
| 510 apply_move(&simulation, &simmove); | |
| 511 _Bool covered = is_covered(&simulation, | 512 _Bool covered = is_covered(&simulation, |
| 512 kingrow, kingfile, opponent_color(color)); | 513 kingrow, kingfile, opponent_color(color)); |
| 513 gamestate_cleanup(&simulation); | 514 gamestate_cleanup(&simulation); |
| 514 | 515 |
| 515 return covered; | 516 return covered; |
| 568 threats, &threatcount)) { | 569 threats, &threatcount)) { |
| 569 | 570 |
| 570 int reason = INVALID_POSITION; | 571 int reason = INVALID_POSITION; |
| 571 | 572 |
| 572 // find threats for the specified position | 573 // find threats for the specified position |
| 573 for (uint8_t i = 0 ; i < threatcount ; i++) { | 574 for (uint8_t i = 0 ; i < threatcount ; i++) { |
| 574 if ((threats[i].piece & (PIECE_MASK | COLOR_MASK)) | 575 if ((threats[i].piece & (PIECE_MASK | COLOR_MASK)) |
| 575 == move->piece && | 576 == move->piece && |
| 576 (move->fromrow == POS_UNSPECIFIED || | 577 (move->fromrow == POS_UNSPECIFIED || |
| 577 move->fromrow == threats[i].fromrow) && | 578 move->fromrow == threats[i].fromrow) && |
| 578 (move->fromfile == POS_UNSPECIFIED || | 579 (move->fromfile == POS_UNSPECIFIED || |
