/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
- Copyright (C) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
+ Copyright (C) 2008-2014 Marco Costalba, Joona Kiiski, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-#if !defined(TYPES_H_INCLUDED)
+#ifndef TYPES_H_INCLUDED
#define TYPES_H_INCLUDED
+/// For Linux and OSX configuration is done automatically using Makefile. To get
+/// started type 'make help'.
+///
+/// For Windows, part of the configuration is detected automatically, but some
+/// switches need to be set manually:
+///
+/// -DNDEBUG | Disable debugging mode. Always use this.
+///
+/// -DNO_PREFETCH | Disable use of prefetch asm-instruction. A must if you want
+/// | the executable to run on some very old machines.
+///
+/// -DUSE_POPCNT | Add runtime support for use of popcnt asm-instruction. Works
+/// | only in 64-bit mode. For compiling requires hardware with
+/// | popcnt support.
+
+#include <cassert>
+#include <cctype>
#include <climits>
#include <cstdlib>
-#if defined(_MSC_VER)
+#include "platform.h"
-// Disable some silly and noisy warning from MSVC compiler
-#pragma warning(disable: 4800) // Forcing value to bool 'true' or 'false'
-#pragma warning(disable: 4127) // Conditional expression is constant
-#pragma warning(disable: 4146) // Unary minus operator applied to unsigned type
-
-// MSVC does not support <inttypes.h>
-typedef signed __int8 int8_t;
-typedef unsigned __int8 uint8_t;
-typedef signed __int16 int16_t;
-typedef unsigned __int16 uint16_t;
-typedef signed __int32 int32_t;
-typedef unsigned __int32 uint32_t;
-typedef signed __int64 int64_t;
-typedef unsigned __int64 uint64_t;
-
-#else
-
-#include <inttypes.h>
+#define unlikely(x) (x) // For code annotation purposes
+#if defined(_WIN64) && !defined(IS_64BIT)
+# include <intrin.h> // MSVC popcnt and bsfq instrinsics
+# define IS_64BIT
+# define USE_BSFQ
#endif
-#define Min(x, y) (((x) < (y)) ? (x) : (y))
-#define Max(x, y) (((x) < (y)) ? (y) : (x))
-
-////
-//// Configuration
-////
-
-//// For Linux and OSX configuration is done automatically using Makefile.
-//// To get started type "make help".
-////
-//// For windows part of the configuration is detected automatically, but
-//// some switches need to be set manually:
-////
-//// -DNDEBUG | Disable debugging mode. Use always.
-////
-//// -DNO_PREFETCH | Disable use of prefetch asm-instruction. A must if you want the
-//// | executable to run on some very old machines.
-////
-//// -DUSE_POPCNT | Add runtime support for use of popcnt asm-instruction.
-//// | Works only in 64-bit mode. For compiling requires hardware
-//// | with popcnt support. Around 4% speed-up.
-////
-//// -DOLD_LOCKS | By default under Windows are used the fast Slim Reader/Writer (SRW)
-//// | Locks and Condition Variables: these are not supported by Windows XP
-//// | and older, to compile for those platforms you should enable OLD_LOCKS.
-
-// Automatic detection for 64-bit under Windows
-#if defined(_WIN64)
-#define IS_64BIT
-#endif
-
-// Automatic detection for use of bsfq asm-instruction under Windows
-#if defined(_WIN64)
-#define USE_BSFQ
-#endif
-
-// Intel header for _mm_popcnt_u64() intrinsic
#if defined(USE_POPCNT) && defined(_MSC_VER) && defined(__INTEL_COMPILER)
-#include <nmmintrin.h>
+# include <nmmintrin.h> // Intel header for _mm_popcnt_u64() intrinsic
#endif
-// Cache line alignment specification
+# if !defined(NO_PREFETCH) && (defined(__INTEL_COMPILER) || defined(_MSC_VER))
+# include <xmmintrin.h> // Intel and Microsoft header for _mm_prefetch()
+# endif
+
+#define CACHE_LINE_SIZE 64
#if defined(_MSC_VER) || defined(__INTEL_COMPILER)
-#define CACHE_LINE_ALIGNMENT __declspec(align(64))
+# define CACHE_LINE_ALIGNMENT __declspec(align(CACHE_LINE_SIZE))
#else
-#define CACHE_LINE_ALIGNMENT __attribute__ ((aligned(64)))
+# define CACHE_LINE_ALIGNMENT __attribute__ ((aligned(CACHE_LINE_SIZE)))
#endif
-// Define a __cpuid() function for gcc compilers, for Intel and MSVC
-// is already available as an intrinsic.
-#if defined(_MSC_VER)
-#include <intrin.h>
-#elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
-inline void __cpuid(int CPUInfo[4], int InfoType)
-{
- int* eax = CPUInfo + 0;
- int* ebx = CPUInfo + 1;
- int* ecx = CPUInfo + 2;
- int* edx = CPUInfo + 3;
-
- *eax = InfoType;
- *ecx = 0;
- __asm__("cpuid" : "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=d" (*edx)
- : "0" (*eax), "2" (*ecx));
-}
-#else
-inline void __cpuid(int CPUInfo[4], int)
-{
- CPUInfo[0] = CPUInfo[1] = CPUInfo[2] = CPUInfo[3] = 0;
-}
-#endif
-
-// Define FORCE_INLINE macro to force inlining overriding compiler choice
-#if defined(_MSC_VER)
-#define FORCE_INLINE __forceinline
+#ifdef _MSC_VER
+# define FORCE_INLINE __forceinline
#elif defined(__GNUC__)
-#define FORCE_INLINE inline __attribute__((always_inline))
+# define FORCE_INLINE inline __attribute__((always_inline))
#else
-#define FORCE_INLINE inline
+# define FORCE_INLINE inline
#endif
-/// cpu_has_popcnt() detects support for popcnt instruction at runtime
-inline bool cpu_has_popcnt() {
-
- int CPUInfo[4] = {-1};
- __cpuid(CPUInfo, 0x00000001);
- return (CPUInfo[2] >> 23) & 1;
-}
-
-/// CpuHasPOPCNT is a global constant initialized at startup that
-/// is set to true if CPU on which application runs supports popcnt
-/// hardware instruction. Unless USE_POPCNT is not defined.
-#if defined(USE_POPCNT)
-const bool CpuHasPOPCNT = cpu_has_popcnt();
+#ifdef USE_POPCNT
+const bool HasPopCnt = true;
#else
-const bool CpuHasPOPCNT = false;
+const bool HasPopCnt = false;
#endif
-
-/// CpuIs64Bit is a global constant initialized at compile time that
-/// is set to true if CPU on which application runs is a 64 bits.
-#if defined(IS_64BIT)
-const bool CpuIs64Bit = true;
+#ifdef IS_64BIT
+const bool Is64Bit = true;
#else
-const bool CpuIs64Bit = false;
+const bool Is64Bit = false;
#endif
-#include <string>
-
typedef uint64_t Key;
typedef uint64_t Bitboard;
-const int PLY_MAX = 100;
-const int PLY_MAX_PLUS_2 = PLY_MAX + 2;
+const int MAX_MOVES = 256;
+const int MAX_PLY = 120;
+const int MAX_PLY_PLUS_6 = MAX_PLY + 6;
+
+/// A move needs 16 bits to be stored
+///
+/// bit 0- 5: destination square (from 0 to 63)
+/// bit 6-11: origin square (from 0 to 63)
+/// bit 12-13: promotion piece type - 2 (from KNIGHT-2 to QUEEN-2)
+/// bit 14-15: special move flag: promotion (1), en passant (2), castling (3)
+/// NOTE: EN-PASSANT bit is set only when a pawn can be captured
+///
+/// Special cases are MOVE_NONE and MOVE_NULL. We can sneak these in because in
+/// any normal move destination square is always different from origin square
+/// while MOVE_NONE and MOVE_NULL have the same origin and destination square.
+
+enum Move {
+ MOVE_NONE,
+ MOVE_NULL = 65
+};
+
+enum MoveType {
+ NORMAL,
+ PROMOTION = 1 << 14,
+ ENPASSANT = 2 << 14,
+ CASTLING = 3 << 14
+};
+
+enum CastlingFlag { // Defined as in PolyGlot book hash key
+ NO_CASTLING,
+ WHITE_OO,
+ WHITE_OOO = WHITE_OO << 1,
+ BLACK_OO = WHITE_OO << 2,
+ BLACK_OOO = WHITE_OO << 3,
+ ANY_CASTLING = WHITE_OO | WHITE_OOO | BLACK_OO | BLACK_OOO,
+ CASTLING_FLAG_NB = 16
+};
-enum ValueType {
- VALUE_TYPE_NONE = 0,
- VALUE_TYPE_UPPER = 1,
- VALUE_TYPE_LOWER = 2,
- VALUE_TYPE_EXACT = VALUE_TYPE_UPPER | VALUE_TYPE_LOWER
+enum CastlingSide {
+ KING_SIDE,
+ QUEEN_SIDE,
+ CASTLING_SIDE_NB = 2
+};
+
+enum Phase {
+ PHASE_ENDGAME,
+ PHASE_MIDGAME = 128,
+ MG = 0, EG = 1, PHASE_NB = 2
+};
+
+enum ScaleFactor {
+ SCALE_FACTOR_DRAW = 0,
+ SCALE_FACTOR_ONEPAWN = 48,
+ SCALE_FACTOR_NORMAL = 64,
+ SCALE_FACTOR_MAX = 128,
+ SCALE_FACTOR_NONE = 255
+};
+
+enum Bound {
+ BOUND_NONE,
+ BOUND_UPPER,
+ BOUND_LOWER,
+ BOUND_EXACT = BOUND_UPPER | BOUND_LOWER
};
enum Value {
VALUE_ZERO = 0,
VALUE_DRAW = 0,
- VALUE_KNOWN_WIN = 15000,
+ VALUE_KNOWN_WIN = 10000,
VALUE_MATE = 30000,
VALUE_INFINITE = 30001,
VALUE_NONE = 30002,
- VALUE_MATE_IN_PLY_MAX = VALUE_MATE - PLY_MAX,
- VALUE_MATED_IN_PLY_MAX = -VALUE_MATE + PLY_MAX,
+ VALUE_MATE_IN_MAX_PLY = VALUE_MATE - MAX_PLY,
+ VALUE_MATED_IN_MAX_PLY = -VALUE_MATE + MAX_PLY,
VALUE_ENSURE_INTEGER_SIZE_P = INT_MAX,
- VALUE_ENSURE_INTEGER_SIZE_N = INT_MIN
+ VALUE_ENSURE_INTEGER_SIZE_N = INT_MIN,
+
+ PawnValueMg = 198, PawnValueEg = 258,
+ KnightValueMg = 817, KnightValueEg = 846,
+ BishopValueMg = 836, BishopValueEg = 857,
+ RookValueMg = 1270, RookValueEg = 1278,
+ QueenValueMg = 2521, QueenValueEg = 2558
};
enum PieceType {
- PIECE_TYPE_NONE = 0,
- PAWN = 1, KNIGHT = 2, BISHOP = 3, ROOK = 4, QUEEN = 5, KING = 6
+ NO_PIECE_TYPE, PAWN, KNIGHT, BISHOP, ROOK, QUEEN, KING,
+ ALL_PIECES = 0,
+ PIECE_TYPE_NB = 8
};
enum Piece {
- PIECE_NONE_DARK_SQ = 0, WP = 1, WN = 2, WB = 3, WR = 4, WQ = 5, WK = 6,
- BP = 9, BN = 10, BB = 11, BR = 12, BQ = 13, BK = 14, PIECE_NONE = 16
+ NO_PIECE,
+ W_PAWN = 1, W_KNIGHT, W_BISHOP, W_ROOK, W_QUEEN, W_KING,
+ B_PAWN = 9, B_KNIGHT, B_BISHOP, B_ROOK, B_QUEEN, B_KING,
+ PIECE_NB = 16
};
enum Color {
- WHITE, BLACK, COLOR_NONE
+ WHITE, BLACK, NO_COLOR, COLOR_NB = 2
};
enum Depth {
ONE_PLY = 2,
DEPTH_ZERO = 0 * ONE_PLY,
- DEPTH_QS_CHECKS = -1 * ONE_PLY,
- DEPTH_QS_NO_CHECKS = -2 * ONE_PLY,
- DEPTH_QS_RECAPTURES = -4 * ONE_PLY,
+ DEPTH_QS_CHECKS = 0 * ONE_PLY,
+ DEPTH_QS_NO_CHECKS = -1 * ONE_PLY,
+ DEPTH_QS_RECAPTURES = -5 * ONE_PLY,
DEPTH_NONE = -127 * ONE_PLY
};
SQ_A8, SQ_B8, SQ_C8, SQ_D8, SQ_E8, SQ_F8, SQ_G8, SQ_H8,
SQ_NONE,
+ SQUARE_NB = 64,
+
DELTA_N = 8,
DELTA_E = 1,
DELTA_S = -8,
};
enum File {
- FILE_A, FILE_B, FILE_C, FILE_D, FILE_E, FILE_F, FILE_G, FILE_H
+ FILE_A, FILE_B, FILE_C, FILE_D, FILE_E, FILE_F, FILE_G, FILE_H, FILE_NB
};
enum Rank {
- RANK_1, RANK_2, RANK_3, RANK_4, RANK_5, RANK_6, RANK_7, RANK_8
+ RANK_1, RANK_2, RANK_3, RANK_4, RANK_5, RANK_6, RANK_7, RANK_8, RANK_NB
};
-enum SquareColor {
- DARK, LIGHT
-};
-enum ScaleFactor {
- SCALE_FACTOR_ZERO = 0,
- SCALE_FACTOR_NORMAL = 64,
- SCALE_FACTOR_MAX = 128,
- SCALE_FACTOR_NONE = 255
+/// The Score enum stores a middlegame and an endgame value in a single integer
+/// (enum). The least significant 16 bits are used to store the endgame value
+/// and the upper 16 bits are used to store the middlegame value. The compiler
+/// is free to choose the enum type as long as it can store the data, so we
+/// ensure that Score is an integer type by assigning some big int values.
+enum Score {
+ SCORE_ZERO,
+ SCORE_ENSURE_INTEGER_SIZE_P = INT_MAX,
+ SCORE_ENSURE_INTEGER_SIZE_N = INT_MIN
};
+inline Score make_score(int mg, int eg) { return Score((mg << 16) + eg); }
-/// Score enum keeps a midgame and an endgame value in a single
-/// integer (enum), first LSB 16 bits are used to store endgame
-/// value, while upper bits are used for midgame value. Compiler
-/// is free to choose the enum type as long as can keep its data,
-/// so ensure Score to be an integer type.
-enum Score {
- SCORE_ZERO = 0,
- SCORE_ENSURE_INTEGER_SIZE_P = INT_MAX,
- SCORE_ENSURE_INTEGER_SIZE_N = INT_MIN
-};
+/// Extracting the signed lower and upper 16 bits is not so trivial because
+/// according to the standard a simple cast to short is implementation defined
+/// and so is a right shift of a signed integer.
+inline Value mg_value(Score s) { return Value(((s + 0x8000) & ~0xffff) / 0x10000); }
+
+/// On Intel 64 bit we have a small speed regression with the standard conforming
+/// version. Therefore, in this case we use faster code that, although not 100%
+/// standard compliant, seems to work for Intel and MSVC.
+#if defined(IS_64BIT) && (!defined(__GNUC__) || defined(__INTEL_COMPILER))
+
+inline Value eg_value(Score s) { return Value(int16_t(s & 0xFFFF)); }
+
+#else
+
+inline Value eg_value(Score s) {
+ return Value((int)(unsigned(s) & 0x7FFFU) - (int)(unsigned(s) & 0x8000U));
+}
+
+#endif
-#define ENABLE_OPERATORS_ON(T) \
-inline T operator+ (const T d1, const T d2) { return T(int(d1) + int(d2)); } \
-inline T operator- (const T d1, const T d2) { return T(int(d1) - int(d2)); } \
-inline T operator* (int i, const T d) { return T(i * int(d)); } \
-inline T operator* (const T d, int i) { return T(int(d) * i); } \
-inline T operator/ (const T d, int i) { return T(int(d) / i); } \
-inline T operator- (const T d) { return T(-int(d)); } \
-inline T operator++ (T& d, int) {d = T(int(d) + 1); return d; } \
-inline T operator-- (T& d, int) { d = T(int(d) - 1); return d; } \
-inline void operator+= (T& d1, const T d2) { d1 = d1 + d2; } \
-inline void operator-= (T& d1, const T d2) { d1 = d1 - d2; } \
-inline void operator*= (T& d, int i) { d = T(int(d) * i); } \
-inline void operator/= (T& d, int i) { d = T(int(d) / i); }
+#define ENABLE_SAFE_OPERATORS_ON(T) \
+inline T operator+(const T d1, const T d2) { return T(int(d1) + int(d2)); } \
+inline T operator-(const T d1, const T d2) { return T(int(d1) - int(d2)); } \
+inline T operator*(int i, const T d) { return T(i * int(d)); } \
+inline T operator*(const T d, int i) { return T(int(d) * i); } \
+inline T operator-(const T d) { return T(-int(d)); } \
+inline T& operator+=(T& d1, const T d2) { return d1 = d1 + d2; } \
+inline T& operator-=(T& d1, const T d2) { return d1 = d1 - d2; } \
+inline T& operator*=(T& d, int i) { return d = T(int(d) * i); }
+
+#define ENABLE_OPERATORS_ON(T) ENABLE_SAFE_OPERATORS_ON(T) \
+inline T& operator++(T& d) { return d = T(int(d) + 1); } \
+inline T& operator--(T& d) { return d = T(int(d) - 1); } \
+inline T operator/(const T d, int i) { return T(int(d) / i); } \
+inline T& operator/=(T& d, int i) { return d = T(int(d) / i); }
ENABLE_OPERATORS_ON(Value)
ENABLE_OPERATORS_ON(PieceType)
ENABLE_OPERATORS_ON(File)
ENABLE_OPERATORS_ON(Rank)
-#undef ENABLE_OPERATORS_ON
+/// Additional operators to add integers to a Value
+inline Value operator+(Value v, int i) { return Value(int(v) + i); }
+inline Value operator-(Value v, int i) { return Value(int(v) - i); }
-// Extra operators for adding integers to a Value
-inline Value operator+ (Value v, int i) { return Value(int(v) + i); }
-inline Value operator- (Value v, int i) { return Value(int(v) - i); }
+ENABLE_SAFE_OPERATORS_ON(Score)
-// Extracting the _signed_ lower and upper 16 bits it not so trivial
-// because according to the standard a simple cast to short is
-// implementation defined and so is a right shift of a signed integer.
-inline Value mg_value(Score s) { return Value(((s + 32768) & ~0xffff) / 0x10000); }
+/// Only declared but not defined. We don't want to multiply two scores due to
+/// a very high risk of overflow. So user should explicitly convert to integer.
+inline Score operator*(Score s1, Score s2);
-// Unfortunatly on Intel 64 bit we have a small speed regression, so use a faster code in
-// this case, although not 100% standard compliant it seems to work for Intel and MSVC.
-#if defined(IS_64BIT) && (!defined(__GNUC__) || defined(__INTEL_COMPILER))
-inline Value eg_value(Score s) { return Value(int16_t(s & 0xffff)); }
-#else
-inline Value eg_value(Score s) { return Value((int)(unsigned(s) & 0x7fffu) - (int)(unsigned(s) & 0x8000u)); }
-#endif
+/// Division of a Score must be handled separately for each term
+inline Score operator/(Score s, int i) {
+ return make_score(mg_value(s) / i, eg_value(s) / i);
+}
-inline Score make_score(int mg, int eg) { return Score((mg << 16) + eg); }
+#undef ENABLE_OPERATORS_ON
+#undef ENABLE_SAFE_OPERATORS_ON
-// Division must be handled separately for each term
-inline Score operator/(Score s, int i) { return make_score(mg_value(s) / i, eg_value(s) / i); }
+extern Value PieceValue[PHASE_NB][PIECE_NB];
-// Only declared but not defined. We don't want to multiply two scores due to
-// a very high risk of overflow. So user should explicitly convert to integer.
-inline Score operator*(Score s1, Score s2);
+struct ExtMove {
+ Move move;
+ int score;
+};
-// Remaining Score operators are standard
-inline Score operator+ (const Score d1, const Score d2) { return Score(int(d1) + int(d2)); }
-inline Score operator- (const Score d1, const Score d2) { return Score(int(d1) - int(d2)); }
-inline Score operator* (int i, const Score d) { return Score(i * int(d)); }
-inline Score operator* (const Score d, int i) { return Score(int(d) * i); }
-inline Score operator- (const Score d) { return Score(-int(d)); }
-inline void operator+= (Score& d1, const Score d2) { d1 = d1 + d2; }
-inline void operator-= (Score& d1, const Score d2) { d1 = d1 - d2; }
-inline void operator*= (Score& d, int i) { d = Score(int(d) * i); }
-inline void operator/= (Score& d, int i) { d = Score(int(d) / i); }
-
-const Value PawnValueMidgame = Value(0x0C6);
-const Value PawnValueEndgame = Value(0x102);
-const Value KnightValueMidgame = Value(0x331);
-const Value KnightValueEndgame = Value(0x34E);
-const Value BishopValueMidgame = Value(0x344);
-const Value BishopValueEndgame = Value(0x359);
-const Value RookValueMidgame = Value(0x4F6);
-const Value RookValueEndgame = Value(0x4FE);
-const Value QueenValueMidgame = Value(0x9D9);
-const Value QueenValueEndgame = Value(0x9FE);
-
-inline Value value_mate_in(int ply) {
- return VALUE_MATE - ply;
+inline bool operator<(const ExtMove& f, const ExtMove& s) {
+ return f.score < s.score;
}
-inline Value value_mated_in(int ply) {
- return -VALUE_MATE + ply;
+inline Color operator~(Color c) {
+ return Color(c ^ BLACK);
}
-inline Piece make_piece(Color c, PieceType pt) {
- return Piece((c << 3) | pt);
+inline Square operator~(Square s) {
+ return Square(s ^ SQ_A8); // Vertical flip SQ_A1 -> SQ_A8
}
-inline PieceType type_of_piece(Piece p) {
- return PieceType(p & 7);
+inline Square operator|(File f, Rank r) {
+ return Square((r << 3) | f);
}
-inline Color color_of_piece(Piece p) {
- return Color(p >> 3);
+inline Value mate_in(int ply) {
+ return VALUE_MATE - ply;
}
-inline Color opposite_color(Color c) {
- return Color(c ^ 1);
+inline Value mated_in(int ply) {
+ return -VALUE_MATE + ply;
}
-inline char piece_type_to_char(PieceType pt) {
- static const char ch[] = " PNBRQK";
- return ch[pt];
+inline Piece make_piece(Color c, PieceType pt) {
+ return Piece((c << 3) | pt);
}
-inline Square make_square(File f, Rank r) {
- return Square((r << 3) | f);
+inline CastlingFlag make_castling_flag(Color c, CastlingSide s) {
+ return CastlingFlag(WHITE_OO << ((s == QUEEN_SIDE) + 2 * c));
}
-inline bool square_is_ok(Square s) {
- return s >= SQ_A1 && s <= SQ_H8;
+inline PieceType type_of(Piece p) {
+ return PieceType(p & 7);
}
-inline File square_file(Square s) {
- return File(s & 7);
+inline Color color_of(Piece p) {
+ assert(p != NO_PIECE);
+ return Color(p >> 3);
}
-inline Rank square_rank(Square s) {
- return Rank(s >> 3);
+inline bool is_ok(Square s) {
+ return s >= SQ_A1 && s <= SQ_H8;
}
-inline Square flip_square(Square s) {
- return Square(s ^ 56);
+inline File file_of(Square s) {
+ return File(s & 7);
}
-inline Square flop_square(Square s) {
- return Square(s ^ 7);
+inline Rank rank_of(Square s) {
+ return Rank(s >> 3);
}
inline Square relative_square(Color c, Square s) {
}
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 bool opposite_colors(Square s1, Square s2) {
+ int s = int(s1) ^ int(s2);
+ return ((s >> 3) ^ s) & 1;
}
-inline bool opposite_color_squares(Square s1, Square s2) {
- int s = s1 ^ s2;
- return ((s >> 3) ^ s) & 1;
+inline char file_to_char(File f, bool tolower = true) {
+ return char(f - FILE_A + (tolower ? 'a' : 'A'));
}
-inline int file_distance(Square s1, Square s2) {
- return abs(square_file(s1) - square_file(s2));
+inline char rank_to_char(Rank r) {
+ return char(r - RANK_1 + '1');
}
-inline int rank_distance(Square s1, Square s2) {
- return abs(square_rank(s1) - square_rank(s2));
+inline Square pawn_push(Color c) {
+ return c == WHITE ? DELTA_N : DELTA_S;
}
-inline int square_distance(Square s1, Square s2) {
- return Max(file_distance(s1, s2), rank_distance(s1, s2));
+inline Square from_sq(Move m) {
+ return Square((m >> 6) & 0x3F);
}
-inline char file_to_char(File f) {
- return char(f - FILE_A + int('a'));
+inline Square to_sq(Move m) {
+ return Square(m & 0x3F);
}
-inline char rank_to_char(Rank r) {
- return char(r - RANK_1 + int('1'));
+inline MoveType type_of(Move m) {
+ return MoveType(m & (3 << 14));
}
-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);
+inline PieceType promotion_type(Move m) {
+ return PieceType(((m >> 12) & 3) + 2);
}
-inline Square pawn_push(Color c) {
- return c == WHITE ? DELTA_N : DELTA_S;
+inline Move make_move(Square from, Square to) {
+ return Move(to | (from << 6));
+}
+
+template<MoveType T>
+inline Move make(Square from, Square to, PieceType pt = KNIGHT) {
+ return Move(to | (from << 6) | T | ((pt - KNIGHT) << 12));
+}
+
+inline bool is_ok(Move m) {
+ return from_sq(m) != to_sq(m); // Catches also MOVE_NULL and MOVE_NONE
+}
+
+#include <string>
+
+inline const std::string square_to_string(Square s) {
+ char ch[] = { file_to_char(file_of(s)), rank_to_char(rank_of(s)), 0 };
+ return ch;
}
-#endif // !defined(TYPES_H_INCLUDED)
+#endif // #ifndef TYPES_H_INCLUDED