1 2 // colour.c 3 4 // includes 5 6 #include "colour.h" 7 #include "util.h" 8 9 // functions 10 11 // colour_is_ok() 12 colour_is_ok(int colour)13bool colour_is_ok(int colour) { 14 15 return colour == Black || colour == White; 16 } 17 18 // colour_is_white() 19 colour_is_white(int colour)20bool colour_is_white(int colour) { 21 22 ASSERT(colour_is_ok(colour)); 23 24 return colour == White; 25 } 26 27 // colour_is_black() 28 colour_is_black(int colour)29bool colour_is_black(int colour) { 30 31 ASSERT(colour_is_ok(colour)); 32 33 return colour == Black; 34 } 35 36 // colour_equal() 37 colour_equal(int colour_1,int colour_2)38bool colour_equal(int colour_1, int colour_2) { 39 40 ASSERT(colour_is_ok(colour_2)); 41 42 return (colour_1 & colour_2) != 0; 43 } 44 45 // colour_opp() 46 colour_opp(int colour)47int colour_opp(int colour) { 48 49 ASSERT(colour_is_ok(colour)); 50 51 return colour ^ (BlackFlag^WhiteFlag); 52 } 53 54 // end of colour.cpp 55 56