Subversion Repositories Games.Chess Giants

/*

  Stockfish, a UCI chess playing engine derived from Glaurung 2.1

  Copyright (C) 2004-2008 Tord Romstad (Glaurung author)

  Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad

  Copyright (C) 2015-2018 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

  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/>.

*/

#include <algorithm>

#include <cassert>

#include <ostream>

#include "misc.h"

#include "search.h"

#include "thread.h"

#include "tt.h"

#include "uci.h"

#include "syzygy/tbprobe.h"

using std::string;

UCI::OptionsMap Options; // Global object

namespace UCI {

/// 'On change' actions, triggered by an option's value change

void on_clear_hash(const Option&) { Search::clear(); }

void on_hash_size(const Option& o) { TT.resize(o); }

void on_logger(const Option& o) { start_logger(o); }

void on_threads(const Option& o) { Threads.set(o); }

void on_tb_path(const Option& o) { Tablebases::init(o); }

/// Our case insensitive less() function as required by UCI protocol

bool CaseInsensitiveLess::operator() (const string& s1, const string& s2) const {

  return std::lexicographical_compare(s1.begin(), s1.end(), s2.begin(), s2.end(),

         [](char c1, char c2) { return tolower(c1) < tolower(c2); });

}

/// init() initializes the UCI options to their hard-coded default values

void init(OptionsMap& o) {

  // at most 2^32 clusters.

  const int MaxHashMB = Is64Bit ? 131072 : 2048;

  o["Debug Log File"]        << Option("", on_logger);

  o["Contempt"]              << Option(20, -100, 100);

  o["Threads"]               << Option(1, 1, 512, on_threads);

  o["Hash"]                  << Option(16, 1, MaxHashMB, on_hash_size);

  o["Clear Hash"]            << Option(on_clear_hash);

  o["Ponder"]                << Option(false);

  o["MultiPV"]               << Option(1, 1, 500);

  o["Skill Level"]           << Option(20, 0, 20);

  o["Move Overhead"]         << Option(30, 0, 5000);

  o["Minimum Thinking Time"] << Option(20, 0, 5000);

  o["Slow Mover"]            << Option(89, 10, 1000);

  o["nodestime"]             << Option(0, 0, 10000);

  o["UCI_Chess960"]          << Option(false);

  o["SyzygyPath"]            << Option("<empty>", on_tb_path);

  o["SyzygyProbeDepth"]      << Option(1, 1, 100);

  o["Syzygy50MoveRule"]      << Option(true);

  o["SyzygyProbeLimit"]      << Option(6, 0, 6);

}

/// operator<<() is used to print all the options default values in chronological

/// insertion order (the idx field) and in the format defined by the UCI protocol.

std::ostream& operator<<(std::ostream& os, const OptionsMap& om) {

  for (size_t idx = 0; idx < om.size(); ++idx)

      for (const auto& it : om)

          if (it.second.idx == idx)

          {

              const Option& o = it.second;

              os << "\noption name " << it.first << " type " << o.type;

              if (o.type != "button")

                  os << " default " << o.defaultValue;

              if (o.type == "spin")

                  os << " min " << o.min << " max " << o.max;

              break;

          }

  return os;

}

/// Option class constructors and conversion operators

Option::Option(const char* v, OnChange f) : type("string"), min(0), max(0), on_change(f)

{ defaultValue = currentValue = v; }

Option::Option(bool v, OnChange f) : type("check"), min(0), max(0), on_change(f)

{ defaultValue = currentValue = (v ? "true" : "false"); }

Option::Option(OnChange f) : type("button"), min(0), max(0), on_change(f)

{}

Option::Option(int v, int minv, int maxv, OnChange f) : type("spin"), min(minv), max(maxv), on_change(f)

{ defaultValue = currentValue = std::to_string(v); }

Option::operator int() const {

  assert(type == "check" || type == "spin");

  return (type == "spin" ? stoi(currentValue) : currentValue == "true");

}

Option::operator std::string() const {

  assert(type == "string");

  return currentValue;

}

/// operator<<() inits options and assigns idx in the correct printing order

void Option::operator<<(const Option& o) {

  static size_t insert_order = 0;

  *this = o;

  idx = insert_order++;

}

/// operator=() updates currentValue and triggers on_change() action. It's up to

/// the GUI to check for option's limits, but we could receive the new value from

/// the user by console window, so let's check the bounds anyway.

Option& Option::operator=(const string& v) {

  assert(!type.empty());

  if (   (type != "button" && v.empty())

      || (type == "check" && v != "true" && v != "false")

      || (type == "spin" && (stoi(v) < min || stoi(v) > max)))

      return *this;

  if (type != "button")

      currentValue = v;

  if (on_change)

      on_change(*this);

  return *this;

}

} // namespace UCI