// colour.h

#ifndef COLOUR_H
#define COLOUR_H

// includes

#include "util.h"

// constants

const int ColourNone = -1;
const int White = 0;
const int Black = 1;
const int ColourNb = 2;
const int WhiteFlag = 1 << White;
const int BlackFlag = 1 << Black;

// macros

#define COLOUR_IS_OK(colour)    (((colour)&~1)==0)
#define COLOUR_IS_WHITE(colour) ((colour)==White)
#define COLOUR_IS_BLACK(colour) ((colour)!=White)
#define COLOUR_IS(piece,colour) (FLAG_IS((piece),COLOUR_FLAG(colour)))
#define FLAG_IS(piece,flag)     (((piece)&(flag))!=0)
#define COLOUR_OPP(colour)      ((colour)^(White^Black))
#define COLOUR_FLAG(colour)     ((colour)+1)

#endif // !defined COLOUR_H

// end of colour.h
