Prefer 0 to EmptyBoardBB

[stockfish] / src / types.h

diff --git a/src/types.h b/src/types.h
index 841c794ad0b87691043b7d3a58c692b6fdb8d5f5..7040b5ad8fd8d333835143ea5cb96566eb4dd1fd 100644 (file)
--- a/src/types.h
+++ b/src/types.h
@@ -158,6 +158,24 @@ typedef uint64_t Bitboard;
 const int PLY_MAX = 100;
 const int PLY_MAX_PLUS_2 = PLY_MAX + 2;
 
+const Bitboard FileABB = 0x0101010101010101ULL;
+const Bitboard FileBBB = FileABB << 1;
+const Bitboard FileCBB = FileABB << 2;
+const Bitboard FileDBB = FileABB << 3;
+const Bitboard FileEBB = FileABB << 4;
+const Bitboard FileFBB = FileABB << 5;
+const Bitboard FileGBB = FileABB << 6;
+const Bitboard FileHBB = FileABB << 7;
+
+const Bitboard Rank1BB = 0xFF;
+const Bitboard Rank2BB = Rank1BB << (8 * 1);
+const Bitboard Rank3BB = Rank1BB << (8 * 2);
+const Bitboard Rank4BB = Rank1BB << (8 * 3);
+const Bitboard Rank5BB = Rank1BB << (8 * 4);
+const Bitboard Rank6BB = Rank1BB << (8 * 5);
+const Bitboard Rank7BB = Rank1BB << (8 * 6);
+const Bitboard Rank8BB = Rank1BB << (8 * 7);
+
 enum ValueType {
   VALUE_TYPE_NONE  = 0,
   VALUE_TYPE_UPPER = 1,