Mercurial > hg > terminal-chess / file comparison
comparison: src/chess/rules.c
src/chess/rules.c
- changeset 153
- bad2d6d4b861
- parent 152
- 231e5f07a657
- child 154
- 5336e985bd69
equal
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replaced
| 152:231e5f07a657 | 153:bad2d6d4b861 |
|---|---|
| 335 } | 335 } |
| 336 } | 336 } |
| 337 | 337 |
| 338 static int validate_move_rules(GameState *gamestate, Move *move) { | 338 static int validate_move_rules(GameState *gamestate, Move *move) { |
| 339 /* validate indices (don't trust opponent) */ | 339 /* validate indices (don't trust opponent) */ |
| 340 if (!chkidx(move)) { | 340 if (!isidx(move->fromrow) || !isidx(move->fromfile) || |
| 341 return INVALID_POSITION; | 341 !isidx(move->torow) || !isidx(move->tofile)) { |
| 342 return INVALID_MOVE_SYNTAX; | |
| 342 } | 343 } |
| 343 | 344 |
| 344 /* must move */ | 345 /* must move */ |
| 345 if (move->fromfile == move->tofile && move->fromrow == move->torow) { | 346 if (move->fromfile == move->tofile && move->fromrow == move->torow) { |
| 346 return INVALID_MOVE_SYNTAX; | 347 return INVALID_MOVE_SYNTAX; |
| 842 return NEED_PROMOTION; | 843 return NEED_PROMOTION; |
| 843 } | 844 } |
| 844 | 845 |
| 845 move->piece |= color; | 846 move->piece |= color; |
| 846 | 847 |
| 847 if (!chkidx_to(move)) { | 848 /* up to this point |
| 848 return INVALID_POSITION; | 849 * destination indices must be specified and valid |
| 850 * source indices must either be valid or unspecified | |
| 851 */ | |
| 852 if (!isidxr(move->fromrow) || !isidxr(move->fromfile) || | |
| 853 !isidx(move->torow) || !isidx(move->tofile)) { | |
| 854 return INVALID_MOVE_SYNTAX; | |
| 849 } | 855 } |
| 850 | 856 |
| 851 return VALID_MOVE_SYNTAX; | 857 return VALID_MOVE_SYNTAX; |
| 852 } | 858 } |
| 853 | 859 |
| 856 int result = eval_move1(mstr, move, color); | 862 int result = eval_move1(mstr, move, color); |
| 857 if (result == VALID_MOVE_SYNTAX) { | 863 if (result == VALID_MOVE_SYNTAX) { |
| 858 if (move->fromfile == POS_UNSPECIFIED | 864 if (move->fromfile == POS_UNSPECIFIED |
| 859 || move->fromrow == POS_UNSPECIFIED) { | 865 || move->fromrow == POS_UNSPECIFIED) { |
| 860 return getlocation(gamestate, move); | 866 return getlocation(gamestate, move); |
| 861 } else if (!chkidx_from(move)) { | |
| 862 return INVALID_POSITION; | |
| 863 } | 867 } |
| 864 } | 868 } |
| 865 return result; | 869 return result; |
| 866 } | 870 } |
| 867 | 871 |
