Mercurial > hg > terminal-chess / file comparison
comparison: src/chess/rook.c
src/chess/rook.c
- changeset 47
- d726e4b46c33
- parent 23
- 824c9522ce66
- child 55
- 54ea19938d57
equal
deleted
inserted
replaced
| 46:4dcfb4c58b6d | 47:d726e4b46c33 |
|---|---|
| 56 } | 56 } |
| 57 } | 57 } |
| 58 | 58 |
| 59 return 0; | 59 return 0; |
| 60 } | 60 } |
| 61 | |
| 62 static int rook_getloc_fixedrow(GameState *gamestate, Move *move) { | |
| 63 uint8_t file = POS_UNSPECIFIED; | |
| 64 for (uint8_t f = 0 ; f < 8 ; f++) { | |
| 65 if (gamestate->board[move->fromrow][f] == move->piece) { | |
| 66 if (file == POS_UNSPECIFIED) { | |
| 67 file = f; | |
| 68 } else { | |
| 69 return AMBIGUOUS_MOVE; | |
| 70 } | |
| 71 } | |
| 72 } | |
| 73 if (file == POS_UNSPECIFIED) { | |
| 74 return INVALID_POSITION; | |
| 75 } else { | |
| 76 move->fromfile = file; | |
| 77 return VALID_MOVE_SYNTAX; | |
| 78 } | |
| 79 } | |
| 80 | |
| 81 static int rook_getloc_fixedfile(GameState *gamestate, Move *move) { | |
| 82 uint8_t row = POS_UNSPECIFIED; | |
| 83 for (uint8_t r = 0 ; r < 8 ; r++) { | |
| 84 if (gamestate->board[r][move->fromfile] == move->piece) { | |
| 85 if (row == POS_UNSPECIFIED) { | |
| 86 row = r; | |
| 87 } else { | |
| 88 return AMBIGUOUS_MOVE; | |
| 89 } | |
| 90 } | |
| 91 } | |
| 92 if (row == POS_UNSPECIFIED) { | |
| 93 return INVALID_POSITION; | |
| 94 } else { | |
| 95 move->fromrow = row; | |
| 96 return VALID_MOVE_SYNTAX; | |
| 97 } | |
| 98 } | |
| 99 | |
| 100 int rook_getlocation(GameState *gamestate, Move *move) { | |
| 101 | |
| 102 if (move->fromfile != POS_UNSPECIFIED) { | |
| 103 if (move->fromfile == move->tofile) { | |
| 104 return rook_getloc_fixedfile(gamestate, move); | |
| 105 } else { | |
| 106 if (gamestate->board[move->torow][move->fromfile] == move->piece) { | |
| 107 move->fromrow = move->torow; | |
| 108 return VALID_MOVE_SYNTAX; | |
| 109 } else { | |
| 110 return INVALID_POSITION; | |
| 111 } | |
| 112 } | |
| 113 } | |
| 114 | |
| 115 if (move->fromrow != POS_UNSPECIFIED) { | |
| 116 if (move->fromrow == move->torow) { | |
| 117 return rook_getloc_fixedrow(gamestate, move); | |
| 118 } else { | |
| 119 if (gamestate->board[move->fromrow][move->tofile] == move->piece) { | |
| 120 move->fromfile = move->tofile; | |
| 121 return VALID_MOVE_SYNTAX; | |
| 122 } else { | |
| 123 return INVALID_POSITION; | |
| 124 } | |
| 125 } | |
| 126 } | |
| 127 | |
| 128 Move chkrowmove = *move, chkfilemove = *move; | |
| 129 | |
| 130 chkrowmove.fromrow = move->torow; | |
| 131 int chkrow = rook_getloc_fixedrow(gamestate, &chkrowmove); | |
| 132 | |
| 133 chkfilemove.fromfile = move->tofile; | |
| 134 int chkfile = rook_getloc_fixedfile(gamestate, &chkfilemove); | |
| 135 | |
| 136 if ((chkrow == VALID_MOVE_SYNTAX && chkfile == VALID_MOVE_SYNTAX) || | |
| 137 chkrow == AMBIGUOUS_MOVE || chkfile == AMBIGUOUS_MOVE) { | |
| 138 return AMBIGUOUS_MOVE; | |
| 139 } | |
| 140 | |
| 141 if (chkrow == VALID_MOVE_SYNTAX) { | |
| 142 *move = chkrowmove; | |
| 143 return VALID_MOVE_SYNTAX; | |
| 144 } | |
| 145 | |
| 146 if (chkfile == VALID_MOVE_SYNTAX) { | |
| 147 *move = chkfilemove; | |
| 148 return VALID_MOVE_SYNTAX; | |
| 149 } | |
| 150 | |
| 151 return INVALID_POSITION; | |
| 152 } |
