Retire value.cpp

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>

src/search.cpp

@@ -291,6 +291,8 @@ namespace {
 
   bool connected_moves(const Position& pos, Move m1, Move m2);
   bool value_is_mate(Value value);
+  Value value_to_tt(Value v, int ply);
+  Value value_from_tt(Value v, int ply);
   bool move_is_killer(Move m, SearchStack* ss);
   bool ok_to_use_TT(const TTEntry* tte, Depth depth, Value beta, int ply);
   bool connected_threat(const Position& pos, Move m, Move threat);
@@ -300,6 +302,7 @@ namespace {
   void update_gains(const Position& pos, Move move, Value before, Value after);
 
   int current_search_time();
+  std::string value_to_uci(Value v);
   int nps();
   void poll();
   void ponderhit();
@@ -584,7 +587,7 @@ namespace {
     // so to output information also for iteration 1.
     cout << "info depth " << 1
          << "\ninfo depth " << 1
-         << " score " << value_to_string(rml.get_move_score(0))
+         << " score " << value_to_uci(rml.get_move_score(0))
          << " time " << current_search_time()
          << " nodes " << TM.nodes_searched()
          << " nps " << nps()
@@ -960,7 +963,7 @@ namespace {
                     for (int j = 0; j < Min(MultiPV, rml.move_count()); j++)
                     {
                         cout << "info multipv " << j + 1
-                             << " score " << value_to_string(rml.get_move_score(j))
+                             << " score " << value_to_uci(rml.get_move_score(j))
                              << " depth " << (j <= i ? Iteration : Iteration - 1)
                              << " time " << current_search_time()
                              << " nodes " << TM.nodes_searched()
@@ -1824,8 +1827,8 @@ namespace {
   }
 
 
-  // value_is_mate() checks if the given value is a mate one
+  // value_is_mate() checks if the given value is a mate one eventually
-  // eventually compensated for the ply.
+  // compensated for the ply.
 
   bool value_is_mate(Value value) {
 
@@ -1836,8 +1839,38 @@ namespace {
   }
 
 
-  // move_is_killer() checks if the given move is among the
+  // value_to_tt() adjusts a mate score from "plies to mate from the root" to
-  // killer moves of that ply.
+  // "plies to mate from the current ply".  Non-mate scores are unchanged.
+  // The function is called before storing a value to the transposition table.
+
+  Value value_to_tt(Value v, int ply) {
+
+    if (v >= value_mate_in(PLY_MAX))
+      return v + ply;
+
+    if (v <= value_mated_in(PLY_MAX))
+      return v - ply;
+
+    return v;
+  }
+
+
+  // value_from_tt() is the inverse of value_to_tt(): It adjusts a mate score from
+  // the transposition table to a mate score corrected for the current ply.
+
+  Value value_from_tt(Value v, int ply) {
+
+    if (v >= value_mate_in(PLY_MAX))
+      return v - ply;
+
+    if (v <= value_mated_in(PLY_MAX))
+      return v + ply;
+
+    return v;
+  }
+
+
+  // move_is_killer() checks if the given move is among the killer moves
 
   bool move_is_killer(Move m, SearchStack* ss) {
 
@@ -2052,6 +2085,20 @@ namespace {
   }
 
 
+  // value_to_uci() converts a value to a string suitable for use with the UCI protocol
+
+  std::string value_to_uci(Value v) {
+
+    std::stringstream s;
+
+    if (abs(v) < VALUE_MATE - PLY_MAX * OnePly)
+      s << "cp " << int(v) * 100 / int(PawnValueMidgame); // Scale to pawn = 100
+    else
+      s << "mate " << (v > 0 ? (VALUE_MATE - v + 1) / 2 : -(VALUE_MATE + v) / 2 );
+
+    return s.str();
+  }
+
   // nps() computes the current nodes/second count.
 
   int nps() {
@@ -2209,7 +2256,7 @@ namespace {
   void print_pv_info(const Position& pos, Move pv[], Value alpha, Value beta, Value value) {
 
     cout << "info depth " << Iteration
-         << " score "     << value_to_string(value)
+         << " score "     << value_to_uci(value)
          << (value >= beta ? " lowerbound" : value <= alpha ? " upperbound" : "")
          << " time "  << current_search_time()
          << " nodes " << TM.nodes_searched()

src/value.cpp

@@ -1,96 +0,0 @@
-/*
-  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
-
-  Stockfish is free software: you can redistribute it and/or modify
-  it under the terms of the GNU General Public License as published by
-  the Free Software Foundation, either version 3 of the License, or
-  (at your option) any later version.
-
-  Stockfish is distributed in the hope that it will be useful,
-  but WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-  GNU General Public License for more details.
-
-  You should have received a copy of the GNU General Public License
-  along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
-
-
-////
-//// Includes
-////
-
-#include <sstream>
-#include <string>
-
-#include "value.h"
-
-
-////
-//// Functions
-////
-
-/// value_to_tt() adjusts a mate score from "plies to mate from the root" to
-/// "plies to mate from the current ply".  Non-mate scores are unchanged.
-/// The function is called before storing a value to the transposition table.
-
-Value value_to_tt(Value v, int ply) {
-  if(v >= value_mate_in(100))
-    return v + ply;
-  else if(v <= value_mated_in(100))
-    return v - ply;
-  else
-    return v;
-}
-
-
-/// value_from_tt() is the inverse of value_to_tt():  It adjusts a mate score
-/// from the transposition table to a mate score corrected for the current
-/// ply depth.
-
-Value value_from_tt(Value v, int ply) {
-  if(v >= value_mate_in(100))
-    return v - ply;
-  else if(v <= value_mated_in(100))
-    return v + ply;
-  else
-    return v;
-}
-
-
-/// value_to_centipawns() converts a value from Stockfish's somewhat unusual
-/// scale of pawn = 256 to the more conventional pawn = 100.
-
-int value_to_centipawns(Value v) {
-  return (int(v) * 100) / int(PawnValueMidgame);
-}
-
-
-/// value_from_centipawns() converts a centipawn value to Stockfish's internal
-/// evaluation scale.  It's used when reading the values of UCI options
-/// containing material values (e.g. futility pruning margins).
-
-Value value_from_centipawns(int cp) {
-  return Value((cp * 256) / 100);
-}
-
-
-/// value_to_string() converts a value to a string suitable for use with the
-/// UCI protocol.
-
-const std::string value_to_string(Value v) {
-  std::stringstream s;
-
-  if(abs(v) < VALUE_MATE - 200)
-    s << "cp " << value_to_centipawns(v);
-  else {
-    s << "mate ";
-    if(v > 0)
-      s << (VALUE_MATE - v + 1) / 2;
-    else
-      s << -(VALUE_MATE + v) / 2;
-  }
-  return s.str();
-}

src/value.h

@@ -190,16 +190,4 @@ inline Value piece_value_endgame(Piece p) {
   return PieceValueEndgame[p];
 }
 
-
-////
-//// Prototypes
-////
-
-extern Value value_to_tt(Value v, int ply);
-extern Value value_from_tt(Value v, int ply);
-extern int value_to_centipawns(Value v);
-extern Value value_from_centipawns(int cp);
-extern const std::string value_to_string(Value v);
-
-
 #endif // !defined(VALUE_H_INCLUDED)