Mercurial > hg > terminal-chess / file comparison
comparison: src/chess/fen.c
src/chess/fen.c
- changeset 194
- 619f07c95894
- parent 163
- 2a6d83f4677e
- child 195
- 27d02ccb0cef
equal
deleted
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replaced
| 193:d1420f5c5704 | 194:619f07c95894 |
|---|---|
| 32 #include <stdlib.h> | 32 #include <stdlib.h> |
| 33 #include <stdio.h> | 33 #include <stdio.h> |
| 34 | 34 |
| 35 static size_t fen_pieces(char *str, GameState *gamestate) { | 35 static size_t fen_pieces(char *str, GameState *gamestate) { |
| 36 size_t i = 0; | 36 size_t i = 0; |
| 37 for (int row = 7 ; row >= 0 ; row--) { | 37 Rank rank = 7; |
| 38 do { | |
| 38 unsigned int skip = 0; | 39 unsigned int skip = 0; |
| 39 for (int file = 0 ; file < 8 ; file++) { | 40 for (File file = 0 ; file < 8 ; file++) { |
| 40 if (gamestate->board[row][file]) { | 41 if (gamestate->board[rank][file]) { |
| 41 if (skip > 0) { | 42 if (skip > 0) { |
| 42 str[i++] = '0'+skip; | 43 str[i++] = '0'+skip; |
| 43 skip = 0; | 44 skip = 0; |
| 44 } | 45 } |
| 45 switch (piece_at(gamestate, row, file)) { | 46 switch (piece_at(gamestate, rank, file)) { |
| 46 case WHITE|KING: str[i++] = 'K'; break; | 47 case WHITE|KING: str[i++] = 'K'; break; |
| 47 case WHITE|QUEEN: str[i++] = 'Q'; break; | 48 case WHITE|QUEEN: str[i++] = 'Q'; break; |
| 48 case WHITE|BISHOP: str[i++] = 'B'; break; | 49 case WHITE|BISHOP: str[i++] = 'B'; break; |
| 49 case WHITE|KNIGHT: str[i++] = 'N'; break; | 50 case WHITE|KNIGHT: str[i++] = 'N'; break; |
| 50 case WHITE|ROOK: str[i++] = 'R'; break; | 51 case WHITE|ROOK: str[i++] = 'R'; break; |
| 61 } | 62 } |
| 62 } | 63 } |
| 63 if (skip > 0) { | 64 if (skip > 0) { |
| 64 str[i++] = '0'+skip; | 65 str[i++] = '0'+skip; |
| 65 } | 66 } |
| 66 if (row > 0) { | 67 if (rank > 0) { |
| 67 str[i++] = '/'; | 68 str[i++] = '/'; |
| 68 } | 69 } |
| 69 } | 70 } while (rank-- > 0); |
| 70 | 71 |
| 71 return i; | 72 return i; |
| 72 } | 73 } |
| 73 | 74 |
| 74 static size_t fen_color(char *str, GameState *gamestate) { | 75 static size_t fen_color(char *str, GameState *gamestate) { |
| 75 str[0] = current_color(gamestate) == WHITE ? 'w' : 'b'; | 76 str[0] = current_color(gamestate) == WHITE ? 'w' : 'b'; |
| 76 return 1; | 77 return 1; |
| 77 } | 78 } |
| 78 | 79 |
| 79 static bool fen_castling_chkmoved(GameState *gamestate, | 80 static bool fen_castling_chkmoved(GameState *gamestate, |
| 80 uint8_t row, uint8_t file) { | 81 Rank rank, File file) { |
| 81 | 82 |
| 82 for (unsigned i = 0 ; i < gamestate->movecount ; i++) { | 83 for (unsigned i = 0 ; i < gamestate->movecount ; i++) { |
| 83 if (gamestate->moves[i].fromfile == file | 84 if (gamestate->moves[i].fromfile == file |
| 84 && gamestate->moves[i].fromrow == row) { | 85 && gamestate->moves[i].fromrank == rank) { |
| 85 return true; | 86 return true; |
| 86 } | 87 } |
| 87 } | 88 } |
| 88 | 89 |
| 89 return false; | 90 return false; |
| 90 } | 91 } |
| 91 | 92 |
| 92 static size_t fen_castling(char *str, GameState *gamestate) { | 93 static size_t fen_castling(char *str, GameState *gamestate) { |
| 93 bool K, Q, k, q; | 94 bool K, Q, k, q; |
| 94 | 95 |
| 95 if (fen_castling_chkmoved(gamestate, rowidx('1'), fileidx('e'))) { | 96 if (fen_castling_chkmoved(gamestate, rankidx('1'), fileidx('e'))) { |
| 96 K = Q = false; | 97 K = Q = false; |
| 97 } else { | 98 } else { |
| 98 K = !fen_castling_chkmoved(gamestate, rowidx('1'), fileidx('h')); | 99 K = !fen_castling_chkmoved(gamestate, rankidx('1'), fileidx('h')); |
| 99 Q = !fen_castling_chkmoved(gamestate, rowidx('1'), fileidx('a')); | 100 Q = !fen_castling_chkmoved(gamestate, rankidx('1'), fileidx('a')); |
| 100 } | 101 } |
| 101 if (fen_castling_chkmoved(gamestate, rowidx('8'), fileidx('e'))) { | 102 if (fen_castling_chkmoved(gamestate, rankidx('8'), fileidx('e'))) { |
| 102 k = q = false; | 103 k = q = false; |
| 103 } else { | 104 } else { |
| 104 k = !fen_castling_chkmoved(gamestate, rowidx('8'), fileidx('h')); | 105 k = !fen_castling_chkmoved(gamestate, rankidx('8'), fileidx('h')); |
| 105 q = !fen_castling_chkmoved(gamestate, rowidx('8'), fileidx('a')); | 106 q = !fen_castling_chkmoved(gamestate, rankidx('8'), fileidx('a')); |
| 106 } | 107 } |
| 107 | 108 |
| 108 size_t i = 0; | 109 size_t i = 0; |
| 109 if (K) str[i++] = 'K'; | 110 if (K) str[i++] = 'K'; |
| 110 if (Q) str[i++] = 'Q'; | 111 if (Q) str[i++] = 'Q'; |
| 120 str[0] = '-'; | 121 str[0] = '-'; |
| 121 | 122 |
| 122 for (int file = 0 ; file < 8 ; file++) { | 123 for (int file = 0 ; file < 8 ; file++) { |
| 123 if (enpassant_threat_exists(gamestate, 3, file)) { | 124 if (enpassant_threat_exists(gamestate, 3, file)) { |
| 124 str[0] = filechr(file); | 125 str[0] = filechr(file); |
| 125 str[1] = rowchr(2); | 126 str[1] = rankchr(2); |
| 126 } | 127 } |
| 127 if (enpassant_threat_exists(gamestate, 4, file)) { | 128 if (enpassant_threat_exists(gamestate, 4, file)) { |
| 128 str[0] = filechr(file); | 129 str[0] = filechr(file); |
| 129 str[1] = rowchr(5); | 130 str[1] = rankchr(5); |
| 130 } | 131 } |
| 131 } | 132 } |
| 132 | 133 |
| 133 return str[0] == '-' ? 1 : 2; | 134 return str[0] == '-' ? 1 : 2; |
| 134 } | 135 } |
