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LibChess: Compact the Defenitions of various chess related types

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before:
sizeof(Board)=344, sizeof(Move)=36, sizeof(Piece)=4, sizeof(Square)=8

after:
sizeof(Board)=108, sizeof(Move)=9, sizeof(Piece)=1, sizeof(Square)=2
This commit is contained in:
Peter Elliott 2021-06-19 16:33:20 -06:00 • committed by Andreas Kling
parent 57bb4d1aec
commit 34433f5dc4
1 changed files with 17 additions and 16 deletions
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33
Userland/Libraries/LibChess/Chess.h
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@ -15,7 +15,7 @@
namespace Chess { namespace Chess {
enum class Type { enum class Type : u8 {
Pawn, Pawn,
Knight, Knight,
Bishop, Bishop,
@ -28,7 +28,7 @@ enum class Type {
String char_for_piece(Type type); String char_for_piece(Type type);
Chess::Type piece_for_char_promotion(const StringView& str); Chess::Type piece_for_char_promotion(const StringView& str);
enum class Color { enum class Color : u8 {
White, White,
Black, Black,
None, None,
@ -55,8 +55,8 @@ struct Piece {
constexpr Piece EmptyPiece = { Color::None, Type::None }; constexpr Piece EmptyPiece = { Color::None, Type::None };
struct Square { struct Square {
int rank; // zero indexed; i8 rank; // zero indexed;
int file; i8 file;
Square(const StringView& name); Square(const StringView& name);
Square(const int& rank, const int& file) Square(const int& rank, const int& file)
: rank(rank) : rank(rank)
@ -88,10 +88,10 @@ struct Move {
Square to; Square to;
Type promote_to; Type promote_to;
Piece piece; Piece piece;
bool is_check = false; bool is_check : 1 = false;
bool is_mate = false; bool is_mate : 1 = false;
bool is_capture = false; bool is_capture : 1 = false;
bool is_ambiguous = false; bool is_ambiguous : 1 = false;
Square ambiguous { 50, 50 }; Square ambiguous { 50, 50 };
Move(const StringView& long_algebraic); Move(const StringView& long_algebraic);
Move(const Square& from, const Square& to, const Type& promote_to = Type::None) Move(const Square& from, const Square& to, const Type& promote_to = Type::None)
@ -161,16 +161,17 @@ private:
bool apply_illegal_move(const Move&, Color color); bool apply_illegal_move(const Move&, Color color);
Piece m_board[8][8]; Piece m_board[8][8];
Color m_turn { Color::White };
Color m_resigned { Color::None };
Optional<Move> m_last_move; Optional<Move> m_last_move;
int m_moves_since_capture { 0 }; short m_moves_since_capture { 0 };
int m_moves_since_pawn_advance { 0 }; short m_moves_since_pawn_advance { 0 };
bool m_white_can_castle_kingside { true }; Color m_turn : 2 { Color::White };
bool m_white_can_castle_queenside { true }; Color m_resigned : 2 { Color::None };
bool m_black_can_castle_kingside { true };
bool m_black_can_castle_queenside { true }; bool m_white_can_castle_kingside : 1 { true };
bool m_white_can_castle_queenside : 1 { true };
bool m_black_can_castle_kingside : 1 { true };
bool m_black_can_castle_queenside : 1 { true };
// We trust that hash collisions will not happen to save lots of memory and time. // We trust that hash collisions will not happen to save lots of memory and time.
HashMap<unsigned, int> m_previous_states; HashMap<unsigned, int> m_previous_states;