Small touches in position.h

[stockfish] / src / types.h

diff --git a/src/types.h b/src/types.h
index d02755c1adcbd46eeb83f8c1bb89f8eb87198a6f..8facaafa7489b0a0b4e1a0e1fe42dbab3c13b5bb 100644 (file)
--- a/src/types.h
+++ b/src/types.h
@@ -252,6 +252,15 @@ enum ScaleFactor {
   SCALE_FACTOR_NONE   = 255
 };
 
+enum CastleRight {
+  CASTLES_NONE = 0,
+  WHITE_OO     = 1,
+  BLACK_OO     = 2,
+  WHITE_OOO    = 4,
+  BLACK_OOO    = 8,
+  ALL_CASTLES  = 15
+};
+
 
 /// Score enum keeps a midgame and an endgame value in a single
 /// integer (enum), first LSB 16 bits are used to store endgame
@@ -337,6 +346,18 @@ const Value RookValueEndgame   = Value(0x4FE);
 const Value QueenValueMidgame  = Value(0x9D9);
 const Value QueenValueEndgame  = Value(0x9FE);
 
+extern const Value PieceValueMidgame[17];
+extern const Value PieceValueEndgame[17];
+extern int SquareDistance[64][64];
+
+inline Value piece_value_midgame(Piece p) {
+  return PieceValueMidgame[p];
+}
+
+inline Value piece_value_endgame(Piece p) {
+  return PieceValueEndgame[p];
+}
+
 inline Value value_mate_in(int ply) {
   return VALUE_MATE - ply;
 }
@@ -349,23 +370,18 @@ inline Piece make_piece(Color c, PieceType pt) {
   return Piece((c << 3) | pt);
 }
 
-inline PieceType type_of_piece(Piece p)  {
+inline PieceType type_of(Piece p)  {
   return PieceType(p & 7);
 }
 
-inline Color color_of_piece(Piece p) {
+inline Color color_of(Piece p) {
   return Color(p >> 3);
 }
 
-inline Color opposite_color(Color c) {
+inline Color flip(Color c) {
   return Color(c ^ 1);
 }
 
-inline char piece_type_to_char(PieceType pt) {
-  static const char ch[] = " PNBRQK";
-  return ch[pt];
-}
-
 inline Square make_square(File f, Rank r) {
   return Square((r << 3) | f);
 }
@@ -374,19 +390,19 @@ inline bool square_is_ok(Square s) {
   return s >= SQ_A1 && s <= SQ_H8;
 }
 
-inline File square_file(Square s) {
+inline File file_of(Square s) {
   return File(s & 7);
 }
 
-inline Rank square_rank(Square s) {
+inline Rank rank_of(Square s) {
   return Rank(s >> 3);
 }
 
-inline Square flip_square(Square s) {
+inline Square flip(Square s) {
   return Square(s ^ 56);
 }
 
-inline Square flop_square(Square s) {
+inline Square mirror(Square s) {
   return Square(s ^ 7);
 }
 
@@ -399,28 +415,32 @@ inline Rank relative_rank(Color c, Rank r) {
 }
 
 inline Rank relative_rank(Color c, Square s) {
-  return relative_rank(c, square_rank(s));
+  return relative_rank(c, rank_of(s));
 }
 
-inline SquareColor square_color(Square s) {
-  return SquareColor(int(square_rank(s) + s) & 1);
+inline SquareColor color_of(Square s) {
+  return SquareColor(int(rank_of(s) + s) & 1);
 }
 
-inline bool opposite_color_squares(Square s1, Square s2) {
+inline bool opposite_colors(Square s1, Square s2) {
   int s = s1 ^ s2;
   return ((s >> 3) ^ s) & 1;
 }
 
 inline int file_distance(Square s1, Square s2) {
-  return abs(square_file(s1) - square_file(s2));
+  return abs(file_of(s1) - file_of(s2));
 }
 
 inline int rank_distance(Square s1, Square s2) {
-  return abs(square_rank(s1) - square_rank(s2));
+  return abs(rank_of(s1) - rank_of(s2));
 }
 
 inline int square_distance(Square s1, Square s2) {
-  return Max(file_distance(s1, s2), rank_distance(s1, s2));
+  return SquareDistance[s1][s2];
+}
+
+inline char piece_type_to_char(PieceType pt) {
+  return " PNBRQK"[pt];
 }
 
 inline char file_to_char(File f) {
@@ -432,8 +452,8 @@ inline char rank_to_char(Rank r) {
 }
 
 inline const std::string square_to_string(Square s) {
-  char ch[] = { file_to_char(square_file(s)), rank_to_char(square_rank(s)), 0 };
-  return std::string(ch);
+  char ch[] = { file_to_char(file_of(s)), rank_to_char(rank_of(s)), 0 };
+  return ch;
 }
 
 inline Square pawn_push(Color c) {