1.1 --- a/src/chess/rules.h Tue Apr 01 10:28:08 2014 +0200
1.2 +++ b/src/chess/rules.h Tue Apr 01 12:30:25 2014 +0200
1.3 @@ -95,6 +95,8 @@
1.4 MoveList* lastmove;
1.5 } GameState;
1.6
1.7 +#define opponent_color(color) ((color)==WHITE?BLACK:WHITE)
1.8 +
1.9 #define POS_UNSPECIFIED UINT8_MAX
1.10 #define mdst(b,m) b[(m)->torow][(m)->tofile]
1.11 #define msrc(b,m) b[(m)->fromrow][(m)->fromfile]
1.12 @@ -140,6 +142,18 @@
1.13 char getpiecechr(uint8_t piece);
1.14
1.15 /**
1.16 + * Checks, if a specified field is covered by a piece of a certain color.
1.17 + *
1.18 + * @param gamestate the current game state
1.19 + * @param row row of the field to check
1.20 + * @param file file of the field to check
1.21 + * @param color the color of the piece that should cover the field
1.22 + * @return TRUE, if any piece of the specified color threatens the specified
1.23 + * field (i.e. could capture an opponent piece)
1.24 + */
1.25 +_Bool is_covered(GameState *gamestate,uint8_t row,uint8_t file,uint8_t color);
1.26 +
1.27 +/**
1.28 * Evaluates a move syntactically and stores the move data in the specified
1.29 * object.
1.30 *
