X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.h;h=e4592e27cca2197512b60af3a11d10c3f4da894e;hp=84704b0dc5d5a29ef177cdbbc8ae65951bd6cab0;hb=6b909b2343190f2989d21c8f69f40e9f09c530c0;hpb=e870afa5d5a45925c3f2b5677cb15f5ffe2b4e0e

diff --git a/src/search.h b/src/search.h
index 84704b0d..e4592e27 100644
--- 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) 2008-2012 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
@@ -21,25 +21,27 @@
 #define SEARCH_H_INCLUDED
 
 #include <cstring>
+#include <memory>
+#include <stack>
 #include <vector>
 
-#include "move.h"
+#include "misc.h"
+#include "position.h"
 #include "types.h"
 
-class Position;
 struct SplitPoint;
 
-/// 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.
+namespace Search {
+
+/// 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* sp;
   int ply;
   Move currentMove;
   Move excludedMove;
-  Move bestMove;
   Move killers[2];
   Depth reduction;
   Value eval;
@@ -47,35 +49,64 @@ struct SearchStack {
   int skipNullMove;
 };
 
-namespace Search {
 
-/// The SearchLimits struct stores information sent by GUI about available time
+/// 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(){} // Needed by sort()
+  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; }
+  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 is our opponent's side to move.
 
 struct LimitsType {
 
-  LimitsType() {  memset(this, 0, sizeof(LimitsType)); }
-  bool useTimeManagement() const { return !(maxTime | maxDepth | maxNodes | infinite); }
+  LimitsType() { memset(this, 0, sizeof(LimitsType)); }
+  bool use_time_management() const { return !(movetime | depth | nodes | infinite); }
 
-  int time, increment, movesToGo, maxTime, maxDepth, maxNodes, infinite, ponder;
+  int time[2], inc[2], movestogo, depth, nodes, movetime, 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;
 };
 
+typedef std::auto_ptr<std::stack<StateInfo> > StateStackPtr;
+
 extern volatile SignalsType Signals;
 extern LimitsType Limits;
-extern std::vector<Move> RootMoves;
+extern std::vector<RootMove> RootMoves;
 extern Position RootPosition;
+extern Color RootColor;
+extern Time::point SearchTime;
+extern StateStackPtr SetupStates;
 
 extern void init();
-extern int64_t perft(Position& pos, Depth depth);
+extern size_t perft(Position& pos, Depth depth);
 extern void think();
 
-}
-
-extern void do_timer_event();
+} // namespace Search
 
 #endif // !defined(SEARCH_H_INCLUDED)