#ifndef BITBOARD_H_INCLUDED
#define BITBOARD_H_INCLUDED
+#include <string>
+
#include "types.h"
namespace Bitboards {
}
inline int file_distance(Square s1, Square s2) {
- return abs(file_of(s1) - file_of(s2));
+ return dist(file_of(s1), file_of(s2));
}
inline int rank_distance(Square s1, Square s2) {
- return abs(rank_of(s1) - rank_of(s2));
+ return dist(rank_of(s1), rank_of(s2));
}
template<Square Delta>
inline Bitboard shift_bb(Bitboard b) {
- return Delta == DELTA_NE ? (b & ~FileHBB) << 9 : Delta == DELTA_SE ? (b & ~FileHBB) >> 7
+ return Delta == DELTA_N ? b << 8 : Delta == DELTA_S ? b >> 8
+ : Delta == DELTA_NE ? (b & ~FileHBB) << 9 : Delta == DELTA_SE ? (b & ~FileHBB) >> 7
: Delta == DELTA_NW ? (b & ~FileABB) << 7 : Delta == DELTA_SW ? (b & ~FileABB) >> 9
- : Delta > 0 ? b << Delta : b >> -Delta;
+ : 0;
}