X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.h;h=c77ca3ad8991dfea8568f2e70d054fe4c9b8ac96;hp=7b114bf2126ec4b20639bf8772219c8d2130888b;hb=472de897cb7efb66cb3518f3f4924716bd8abaee;hpb=b833c8247afcfd4a5404b0473f31ebddb23f57d6

diff --git a/src/search.h b/src/search.h
index 7b114bf2..c77ca3ad 100644
--- a/src/search.h
+++ b/src/search.h
@@ -1,7 +1,8 @@
 /*
   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
-  Copyright (C) 2008-2009 Marco Costalba
+  Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
+  Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, 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
@@ -17,64 +18,92 @@
   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 <vector>
 
+#include "misc.h"
+#include "movepick.h"
+#include "types.h"
 
-////
-//// Constants
-////
+class Position;
 
-const int PLY_MAX = 100;
-const int PLY_MAX_PLUS_2 = 102;
-const int KILLER_MAX = 2;
+namespace Search {
 
+/// Threshold used for countermoves based pruning
+constexpr int CounterMovePruneThreshold = 0;
 
-////
-//// Types
-////
 
-/// 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;
+/// 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 {
-  Move pv[PLY_MAX_PLUS_2];
+struct Stack {
+  Move* pv;
+  PieceToHistory* continuationHistory;
+  int ply;
   Move currentMove;
-  Move mateKiller;
-  Move threatMove;
-  Move killers[KILLER_MAX];
-  Depth reduction;
-  Value eval;
-  EvalInfo* evalInfo;
-
-  void init(int ply);
-  void initKillers();
+  Move excludedMove;
+  Move killers[2];
+  Value staticEval;
+  int statScore;
+  int moveCount;
+};
+
+
+/// RootMove struct is used for moves at the root of the tree. For each root move
+/// we store a score 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 {
+
+  explicit RootMove(Move m) : pv(1, m) {}
+  bool extract_ponder_from_tt(Position& pos);
+  bool operator==(const Move& m) const { return pv[0] == m; }
+  bool operator<(const RootMove& m) const { // Sort in descending order
+    return m.score != score ? m.score < score
+                            : m.previousScore < previousScore;
+  }
+
+  Value score = -VALUE_INFINITE;
+  Value previousScore = -VALUE_INFINITE;
+  int selDepth = 0;
+  int tbRank = 0;
+  int bestMoveCount = 0;
+  Value tbScore;
+  std::vector<Move> pv;
 };
 
+typedef std::vector<RootMove> RootMoves;
+
+
+/// LimitsType struct stores information sent by GUI about available time to
+/// search the current move, maximum depth/time, or if we are in analysis mode.
+
+struct LimitsType {
+
+  LimitsType() { // Init explicitly due to broken value-initialization of non POD in MSVC
+    time[WHITE] = time[BLACK] = inc[WHITE] = inc[BLACK] = npmsec = movetime = TimePoint(0);
+    movestogo = depth = mate = perft = infinite = 0;
+    nodes = 0;
+  }
+
+  bool use_time_management() const {
+    return !(mate | movetime | depth | nodes | perft | infinite);
+  }
+
+  std::vector<Move> searchmoves;
+  TimePoint time[COLOR_NB], inc[COLOR_NB], npmsec, movetime, startTime;
+  int movestogo, depth, mate, perft, infinite;
+  int64_t nodes;
+};
 
-////
-//// Prototypes
-////
+extern LimitsType Limits;
 
-extern void init_threads();
-extern void stop_threads();
-extern bool think(const Position &pos, bool infinite, bool ponder, int side_to_move,
-                  int time[], int increment[], int movesToGo, int maxDepth,
-                  int maxNodes, int maxTime, Move searchMoves[]);
-extern int perft(Position &pos, Depth depth);
-extern int64_t nodes_searched();
+void init();
+void clear();
 
+} // namespace Search
 
-#endif // !defined(SEARCH_H_INCLUDED)
+#endif // #ifndef SEARCH_H_INCLUDED