/*
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) 2008-2012 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(SEARCH_H_INCLUDED)
#define SEARCH_H_INCLUDED
-////
-//// Includes
-////
-
-#include "depth.h"
-#include "move.h"
-#include "value.h"
-
+#include <cstring>
+#include <vector>
-////
-//// Constants
-////
+#include "types.h"
-const int PLY_MAX = 100;
-const int PLY_MAX_PLUS_2 = 102;
+class Position;
+struct SplitPoint;
+namespace Search {
-////
-//// Types
-////
+/// The Stack struct keeps track of the information we need to remember from
+/// nodes shallower and deeper in the tree during the search. Each search thread
+/// has its own array of Stack objects, indexed by the current ply.
-/// The SearchStack struct keeps track of the information we need to remember
-/// from nodes shallower and deeper in the tree during the search. Each
-/// search thread has its own array of SearchStack objects, indexed by the
-/// current ply.
-struct EvalInfo;
-struct SplitPoint;
-
-struct SearchStack {
+struct Stack {
+ SplitPoint* sp;
+ int ply;
Move currentMove;
- Move mateKiller;
Move excludedMove;
Move bestMove;
Move killers[2];
Depth reduction;
Value eval;
- bool skipNullMove;
- SplitPoint* sp;
+ Value evalMargin;
+ int skipNullMove;
+};
+
+
+/// The LimitsType struct stores information sent by GUI about available time
+/// to search the current move, maximum depth/time, if we are in analysis mode
+/// or if we have to ponder while is our opponent's side to move.
+
+struct LimitsType {
+
+ LimitsType() { memset(this, 0, sizeof(LimitsType)); }
+ bool use_time_management() const { return !(maxTime | maxDepth | maxNodes | infinite); }
+
+ int time, increment, movesToGo, maxTime, maxDepth, maxNodes, infinite, ponder;
+};
+
+
+/// The SignalsType struct stores volatile flags updated during the search
+/// typically in an async fashion, for instance to stop the search by the GUI.
+
+struct SignalsType {
+ bool stopOnPonderhit, firstRootMove, stop, failedLowAtRoot;
};
+extern volatile SignalsType Signals;
+extern LimitsType Limits;
+extern std::vector<Move> SearchMoves;
+extern Position RootPosition;
-////
-//// Prototypes
-////
+extern void init();
+extern int64_t perft(Position& pos, Depth depth);
+extern void think();
-extern void init_search();
-extern void init_threads();
-extern void exit_threads();
-extern int perft(Position& pos, Depth depth);
-extern int64_t nodes_searched();
-extern bool think(const Position& pos, bool infinite, bool ponder, int time[], int increment[],
- int movesToGo, int maxDepth, int maxNodes, int maxTime, Move searchMoves[]);
+} // namespace
#endif // !defined(SEARCH_H_INCLUDED)