Mercurial > hg > terminal-chess / file comparison
comparison: src/game.c
src/game.c
- changeset 9
- 4e4f156bba58
- parent 8
- 52d742aee695
- child 10
- 1347e4dabac0
equal
deleted
inserted
replaced
| 8:52d742aee695 | 9:4e4f156bba58 |
|---|---|
| 72 | 72 |
| 73 static void apply_move(Board board, Move *move) { | 73 static void apply_move(Board board, Move *move) { |
| 74 board[move->fromrow][move->fromfile] = 0; | 74 board[move->fromrow][move->fromfile] = 0; |
| 75 // TODO: care for en passant capture | 75 // TODO: care for en passant capture |
| 76 board[move->torow][move->tofile] = move->piece; | 76 board[move->torow][move->tofile] = move->piece; |
| 77 | |
| 78 /* castling */ | |
| 79 if ((move->piece & PIECE_MASK) == KING && | |
| 80 move->fromfile == fileidx('e')) { | |
| 81 uint8_t color = move->piece & COLOR_MASK; | |
| 82 | |
| 83 if (move->tofile == fileidx('g')) { | |
| 84 board[move->torow][fileidx('h')] = 0; | |
| 85 board[move->torow][fileidx('f')] = color|ROOK; | |
| 86 } else if (move->tofile == fileidx('c')) { | |
| 87 board[move->torow][fileidx('a')] = 0; | |
| 88 board[move->torow][fileidx('d')] = color|ROOK; | |
| 89 } | |
| 90 } | |
| 77 } | 91 } |
| 78 | 92 |
| 79 static _Bool validate_move(Board board, uint8_t mycolor, Move *move) { | 93 static _Bool validate_move(Board board, uint8_t mycolor, Move *move) { |
| 80 _Bool result = TRUE; | 94 _Bool result = TRUE; |
| 81 | 95 |
| 82 /* does piece exist */ | 96 /* does piece exist */ |
| 83 result &= board[move->fromrow][move->fromfile] == move->piece; | 97 result &= board[move->fromrow][move->fromfile] == move->piece; |
| 84 | 98 |
| 85 /* is move rule conform */ | 99 /* does move comply to rules */ |
| 86 // TODO: make it so | 100 // TODO: make it so |
| 87 | 101 |
| 88 /* is piece blocked */ | 102 /* is piece blocked */ |
| 89 // TODO: make it so | 103 // TODO: make it so |
| 90 | 104 |
| 92 // TODO: make it so | 106 // TODO: make it so |
| 93 | 107 |
| 94 return result; | 108 return result; |
| 95 } | 109 } |
| 96 | 110 |
| 97 static _Bool eval_move(Board board, uint8_t mycolor, char *movestr, Move *move) { | 111 static _Bool eval_move(Board board, uint8_t mycolor, char *mstr, Move *move) { |
| 98 memset(move, 0, sizeof(Move)); | 112 memset(move, 0, sizeof(Move)); |
| 99 | 113 |
| 100 size_t len = strlen(movestr); | 114 size_t len = strlen(mstr); |
| 101 | 115 |
| 102 /* remove check */ | 116 /* remove check */ |
| 103 if (movestr[len-1] == '+') { | 117 if (mstr[len-1] == '+') { |
| 104 len--; movestr[len] = '\0'; | 118 len--; mstr[len] = '\0'; |
| 105 move->check = TRUE; | 119 move->check = TRUE; |
| 106 } | 120 } |
| 107 | 121 |
| 108 if (len == 2) { | 122 if (len == 2) { |
| 109 /* pawn move (e.g. "e4") */ | 123 /* pawn move (e.g. "e4") */ |
| 110 if (isfile(movestr[0]) && isrow(movestr[1])) { | 124 if (isfile(mstr[0]) && isrow(mstr[1])) { |
| 111 move->piece = PAWN; | 125 move->piece = PAWN; |
| 112 move->fromfile = move->tofile = fileidx(movestr[0]); | 126 move->fromfile = move->tofile = fileidx(mstr[0]); |
| 113 move->torow = rowidx(movestr[1]); | 127 move->torow = rowidx(mstr[1]); |
| 114 move->fromrow = rowidx(movestr[1]) + (mycolor == WHITE ? -1 : 1); | 128 move->fromrow = rowidx(mstr[1]) + (mycolor == WHITE ? -1 : 1); |
| 115 if (move->fromrow > 6) { | 129 if (move->fromrow > 6) { |
| 116 move->piece = 0; | 130 move->piece = 0; |
| 117 } else { | 131 } else { |
| 118 /* advanced first move */ | 132 /* advanced first move */ |
| 119 if (move->fromrow == (mycolor == WHITE ? 2 : 5) && | 133 if (move->fromrow == (mycolor == WHITE ? 2 : 5) && |
| 125 } | 139 } |
| 126 } | 140 } |
| 127 } | 141 } |
| 128 } | 142 } |
| 129 } else if (len == 3) { | 143 } else if (len == 3) { |
| 130 if (strcmp(movestr, "0-0") == 0) { | 144 if (strcmp(mstr, "O-O") == 0) { |
| 131 /* king side castling */ | 145 /* king side castling */ |
| 132 move->piece = KING; | 146 move->piece = KING; |
| 133 move->fromfile = fileidx('e'); | 147 move->fromfile = fileidx('e'); |
| 134 move->fromfile = fileidx('g'); | 148 move->tofile = fileidx('g'); |
| 135 move->fromrow = move->torow = mycolor == WHITE ? 0 : 7; | 149 move->fromrow = move->torow = mycolor == WHITE ? 0 : 7; |
| 136 } else { | 150 } else { |
| 137 /* unambiguous move (e.g. "Nf3") */ | 151 /* unambiguous move (e.g. "Nf3") */ |
| 138 } | 152 } |
| 139 | 153 |
| 141 /* ambiguous move (e.g. "Ndf3") */ | 155 /* ambiguous move (e.g. "Ndf3") */ |
| 142 | 156 |
| 143 /* unambiguous capture (e.g. "Nxf3", "dxe5") */ | 157 /* unambiguous capture (e.g. "Nxf3", "dxe5") */ |
| 144 | 158 |
| 145 } else if (len == 5) { | 159 } else if (len == 5) { |
| 146 /* queen side castling "O-O-O" */ | 160 if (strcmp(mstr, "O-O-O") == 0) { |
| 147 | 161 /* queen side castling "O-O-O" */ |
| 148 /* ambiguous capture (e.g. "Ndxf3") */ | 162 move->piece = KING; |
| 149 | 163 move->fromfile = fileidx('e'); |
| 150 /* long notation move (e.g. "Nc5a4") */ | 164 move->tofile = fileidx('c'); |
| 151 | 165 move->fromrow = move->torow = mycolor == WHITE ? 0 : 7; |
| 152 /* long notation capture (e.g. "e5xf6") */ | 166 } else { |
| 167 /* ambiguous capture (e.g. "Ndxf3") */ | |
| 168 | |
| 169 /* long notation move (e.g. "Nc5a4") */ | |
| 170 | |
| 171 /* long notation capture (e.g. "e5xf6") */ | |
| 172 } | |
| 153 } else if (len == 6) { | 173 } else if (len == 6) { |
| 154 /* long notation capture (e.g. "Nc5xf3") */ | 174 /* long notation capture (e.g. "Nc5xf3") */ |
| 155 } | 175 } |
| 156 | 176 |
| 157 if (move->piece) { | 177 if (move->piece) { |
