Revert "Symmetric king safety"

[stockfish] / src / search.h

diff --git a/src/search.h b/src/search.h
index b2c876455c7c0c4afcbacdd9d75a43b8bd1c5911..a9f21fa2368febfdfcc37eaf71f9922ea85f0607 100644 (file)
--- a/src/search.h
+++ b/src/search.h
@@ -1,7 +1,7 @@
 /*
   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
@@ -17,61 +17,98 @@
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-
-#if !defined(SEARCH_H_INCLUDED)
+#ifndef SEARCH_H_INCLUDED
 #define SEARCH_H_INCLUDED
 
-////
-//// Includes
-////
-
-#include "depth.h"
-#include "move.h"
-#include "value.h"
-
+#include <memory>
+#include <stack>
+#include <vector>
 
-////
-//// Constants
-////
-
-const int PLY_MAX = 100;
-const int PLY_MAX_PLUS_2 = PLY_MAX + 2;
+#include "misc.h"
+#include "position.h"
+#include "types.h"
 
+struct SplitPoint;
 
-////
-//// Types
-////
+namespace Search {
 
-/// 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;
+/// 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.
 
-struct SearchStack {
+struct Stack {
+  SplitPoint* splitPoint;
+  int ply;
   Move currentMove;
-  Move mateKiller;
+  Move ttMove;
   Move excludedMove;
-  Move bestMove;
   Move killers[2];
   Depth reduction;
-  Value eval;
-  Value evalMargin;
-  bool skipNullMove;
-  SplitPoint* sp;
+  Value staticEval;
+  int skipNullMove;
+};
+
+
+/// RootMove struct is used for moves at the root of the tree. For each root
+/// move we store a score, a node count, and a PV (really a refutation in the
+/// case of moves which fail low). Score is normally set at -VALUE_INFINITE for
+/// all non-pv moves.
+struct RootMove {
+
+  RootMove(Move m) : score(-VALUE_INFINITE), prevScore(-VALUE_INFINITE) {
+    pv.push_back(m); pv.push_back(MOVE_NONE);
+  }
+
+  bool operator<(const RootMove& m) const { return score > m.score; } // Ascending sort
+  bool operator==(const Move& m) const { return pv[0] == m; }
+
+  void extract_pv_from_tt(Position& pos);
+  void insert_pv_in_tt(Position& pos);
+
+  Value score;
+  Value prevScore;
+  std::vector<Move> pv;
+};
+
+
+/// 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 it's our opponent's turn to move.
+
+struct LimitsType {
+
+  LimitsType() { // Using memset on a std::vector is undefined behavior
+    time[WHITE] = time[BLACK] = inc[WHITE] = inc[BLACK] = movestogo =
+    depth = nodes = movetime = mate = infinite = ponder = 0;
+  }
+  bool use_time_management() const { return !(mate | movetime | depth | nodes | infinite); }
+
+  std::vector<Move> searchmoves;
+  int time[COLOR_NB], inc[COLOR_NB], movestogo, depth, nodes, movetime, mate, infinite, ponder;
+};
+
+
+/// The SignalsType struct stores volatile flags updated during the search
+/// typically in an async fashion e.g. to stop the search by the GUI.
+
+struct SignalsType {
+  bool stop, stopOnPonderhit, firstRootMove, failedLowAtRoot;
 };
 
+typedef std::auto_ptr<std::stack<StateInfo> > StateStackPtr;
+
+extern volatile SignalsType Signals;
+extern LimitsType Limits;
+extern std::vector<RootMove> RootMoves;
+extern Position RootPos;
+extern Color RootColor;
+extern Time::point SearchTime;
+extern StateStackPtr SetupStates;
 
-////
-//// Prototypes
-////
+extern void init();
+extern uint64_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 bool think(Position& pos, bool infinite, bool ponder, int time[], int increment[],
-                  int movesToGo, int maxDepth, int maxNodes, int maxTime, Move searchMoves[]);
+} // namespace Search
 
-#endif // !defined(SEARCH_H_INCLUDED)
+#endif // #ifndef SEARCH_H_INCLUDED