Mercurial > hg > terminal-chess / file comparison
comparison: src/chess/rules.h
src/chess/rules.h
- changeset 219
- 24b866230dd4
- parent 218
- 1e9751f8eb0d
- child 220
- 04da225a5677
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| 218:1e9751f8eb0d | 219:24b866230dd4 |
|---|---|
| 164 /** capacity of the move array */ | 164 /** capacity of the move array */ |
| 165 unsigned int movecapacity; | 165 unsigned int movecapacity; |
| 166 /** number of (half-)moves (counting BOTH colors) */ | 166 /** number of (half-)moves (counting BOTH colors) */ |
| 167 unsigned int movecount; | 167 unsigned int movecount; |
| 168 /** number of half-moves that have been played before reaching fen_start */ | 168 /** number of half-moves that have been played before reaching fen_start */ |
| 169 unsigned int move_start; // TODO: use this in board view and PGN export | 169 unsigned int move_start; |
| 170 /** number of half-moves w/o capture or pawn move played before fen_start */ | 170 /** number of half-moves w/o capture or pawn move played before fen_start */ |
| 171 unsigned int fifty_cntr_start; | 171 unsigned int fifty_cntr_start; |
| 172 /** a premove that shall be evaluated next time it's our turn */ | 172 /** a premove that shall be evaluated next time it's our turn */ |
| 173 char premove[8]; | 173 char premove[8]; |
| 174 bool checkmate; | 174 bool checkmate; |
| 208 | 208 |
| 209 static inline char rankchr(Rank rank) {return (char)rank+'1';} | 209 static inline char rankchr(Rank rank) {return (char)rank+'1';} |
| 210 static inline char filechr(File file) {return (char)file+'a';} | 210 static inline char filechr(File file) {return (char)file+'a';} |
| 211 | 211 |
| 212 | 212 |
| 213 /** | |
| 214 * Returns the current move number. | |
| 215 * | |
| 216 * @param gamestate the current game state | |
| 217 * @return the full move number of the move that is next to play | |
| 218 */ | |
| 219 static inline unsigned move_number(const GameState *gamestate) { | |
| 220 return 1 + (gamestate->move_start + gamestate->movecount) / 2; | |
| 221 } | |
| 222 | |
| 223 /** | |
| 224 * Returns the current half-move number. | |
| 225 * | |
| 226 * The counter starts with one. | |
| 227 * | |
| 228 * @param gamestate the current game state | |
| 229 * @return the half-move number of the move that is next to play | |
| 230 */ | |
| 231 static inline unsigned move_number_half(const GameState *gamestate) { | |
| 232 return 1 + gamestate->move_start + gamestate->movecount; | |
| 233 } | |
| 234 | |
| 213 static inline void enpassant_threat_add(GameState *gamestate, | 235 static inline void enpassant_threat_add(GameState *gamestate, |
| 214 File file, Rank rank) { | 236 File file, Rank rank) { |
| 215 gamestate->board[rank][file] |= ENPASSANT_THREAT; | 237 gamestate->board[rank][file] |= ENPASSANT_THREAT; |
| 216 } | 238 } |
| 217 | 239 |
| 239 if (gamestate->movecount == 0) return false; | 261 if (gamestate->movecount == 0) return false; |
| 240 return gamestate->moves[gamestate->movecount - 1].check; | 262 return gamestate->moves[gamestate->movecount - 1].check; |
| 241 } | 263 } |
| 242 | 264 |
| 243 static inline Color field_color(File f, Rank r) { | 265 static inline Color field_color(File f, Rank r) { |
| 244 return (r + f) % 2 == 0 ? BLACK : WHITE; | 266 return ((unsigned)r + (unsigned)f) % 2 == 0 ? BLACK : WHITE; |
| 245 } | 267 } |
| 246 | 268 |
| 247 /** | 269 /** |
| 248 * Initializes a game state and prepares the chess board. | 270 * Initializes a game state and prepares the chess board. |
| 249 * @param gamestate the game state to initialize | 271 * @param gamestate the game state to initialize |
| 292 * Returns the color of the player who is next to move. | 314 * Returns the color of the player who is next to move. |
| 293 * | 315 * |
| 294 * @param gamestate the current game state | 316 * @param gamestate the current game state |
| 295 * @return the color of the player who is next to move | 317 * @return the color of the player who is next to move |
| 296 */ | 318 */ |
| 297 Color current_color(const GameState *gamestate); | 319 static inline Color current_color(const GameState *gamestate) { |
| 320 return move_number_half(gamestate) % 2 ? WHITE : BLACK; | |
| 321 } | |
| 298 | 322 |
| 299 /** | 323 /** |
| 300 * Returns the piece at the specified position. | 324 * Returns the piece at the specified position. |
| 301 * | 325 * |
| 302 * @param gamestate the current game state | 326 * @param gamestate the current game state |
