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  1. /*
  2.   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
  3.   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
  4.   Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
  5.   Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
  6.  
  7.   Stockfish is free software: you can redistribute it and/or modify
  8.   it under the terms of the GNU General Public License as published by
  9.   the Free Software Foundation, either version 3 of the License, or
  10.   (at your option) any later version.
  11.  
  12.   Stockfish is distributed in the hope that it will be useful,
  13.   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15.   GNU General Public License for more details.
  16.  
  17.   You should have received a copy of the GNU General Public License
  18.   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19. */
  20.  
  21. #include <algorithm>
  22. #include <cassert>
  23. #include <ostream>
  24.  
  25. #include "misc.h"
  26. #include "search.h"
  27. #include "thread.h"
  28. #include "tt.h"
  29. #include "uci.h"
  30. #include "syzygy/tbprobe.h"
  31.  
  32. using std::string;
  33.  
  34. UCI::OptionsMap Options; // Global object
  35.  
  36. namespace UCI {
  37.  
  38. /// 'On change' actions, triggered by an option's value change
  39. void on_clear_hash(const Option&) { Search::clear(); }
  40. void on_hash_size(const Option& o) { TT.resize(o); }
  41. void on_logger(const Option& o) { start_logger(o); }
  42. void on_threads(const Option& o) { Threads.set(o); }
  43. void on_tb_path(const Option& o) { Tablebases::init(o); }
  44.  
  45.  
  46. /// Our case insensitive less() function as required by UCI protocol
  47. bool CaseInsensitiveLess::operator() (const string& s1, const string& s2) const {
  48.  
  49.   return std::lexicographical_compare(s1.begin(), s1.end(), s2.begin(), s2.end(),
  50.          [](char c1, char c2) { return tolower(c1) < tolower(c2); });
  51. }
  52.  
  53.  
  54. /// init() initializes the UCI options to their hard-coded default values
  55.  
  56. void init(OptionsMap& o) {
  57.  
  58.   // at most 2^32 clusters.
  59.   constexpr int MaxHashMB = Is64Bit ? 131072 : 2048;
  60.  
  61.   o["Debug Log File"]        << Option("", on_logger);
  62.   o["Contempt"]              << Option(24, -100, 100);
  63.   o["Analysis Contempt"]     << Option("Both var Off var White var Black var Both", "Both");
  64.   o["Threads"]               << Option(1, 1, 512, on_threads);
  65.   o["Hash"]                  << Option(16, 1, MaxHashMB, on_hash_size);
  66.   o["Clear Hash"]            << Option(on_clear_hash);
  67.   o["Ponder"]                << Option(false);
  68.   o["MultiPV"]               << Option(1, 1, 500);
  69.   o["Skill Level"]           << Option(20, 0, 20);
  70.   o["Move Overhead"]         << Option(30, 0, 5000);
  71.   o["Minimum Thinking Time"] << Option(20, 0, 5000);
  72.   o["Slow Mover"]            << Option(84, 10, 1000);
  73.   o["nodestime"]             << Option(0, 0, 10000);
  74.   o["UCI_Chess960"]          << Option(false);
  75.   o["UCI_AnalyseMode"]       << Option(false);
  76.   o["SyzygyPath"]            << Option("<empty>", on_tb_path);
  77.   o["SyzygyProbeDepth"]      << Option(1, 1, 100);
  78.   o["Syzygy50MoveRule"]      << Option(true);
  79.   o["SyzygyProbeLimit"]      << Option(7, 0, 7);
  80. }
  81.  
  82.  
  83. /// operator<<() is used to print all the options default values in chronological
  84. /// insertion order (the idx field) and in the format defined by the UCI protocol.
  85.  
  86. std::ostream& operator<<(std::ostream& os, const OptionsMap& om) {
  87.  
  88.   for (size_t idx = 0; idx < om.size(); ++idx)
  89.       for (const auto& it : om)
  90.           if (it.second.idx == idx)
  91.           {
  92.               const Option& o = it.second;
  93.               os << "\noption name " << it.first << " type " << o.type;
  94.  
  95.               if (o.type == "string" || o.type == "check" || o.type == "combo")
  96.                   os << " default " << o.defaultValue;
  97.  
  98.               if (o.type == "spin")
  99.                   os << " default " << int(stof(o.defaultValue))
  100.                      << " min "     << o.min
  101.                      << " max "     << o.max;
  102.  
  103.               break;
  104.           }
  105.  
  106.   return os;
  107. }
  108.  
  109.  
  110. /// Option class constructors and conversion operators
  111.  
  112. Option::Option(const char* v, OnChange f) : type("string"), min(0), max(0), on_change(f)
  113. { defaultValue = currentValue = v; }
  114.  
  115. Option::Option(bool v, OnChange f) : type("check"), min(0), max(0), on_change(f)
  116. { defaultValue = currentValue = (v ? "true" : "false"); }
  117.  
  118. Option::Option(OnChange f) : type("button"), min(0), max(0), on_change(f)
  119. {}
  120.  
  121. Option::Option(double v, int minv, int maxv, OnChange f) : type("spin"), min(minv), max(maxv), on_change(f)
  122. { defaultValue = currentValue = std::to_string(v); }
  123.  
  124. Option::Option(const char* v, const char* cur, OnChange f) : type("combo"), min(0), max(0), on_change(f)
  125. { defaultValue = v; currentValue = cur; }
  126.  
  127. Option::operator double() const {
  128.   assert(type == "check" || type == "spin");
  129.   return (type == "spin" ? stof(currentValue) : currentValue == "true");
  130. }
  131.  
  132. Option::operator std::string() const {
  133.   assert(type == "string");
  134.   return currentValue;
  135. }
  136.  
  137. bool Option::operator==(const char* s) const {
  138.   assert(type == "combo");
  139.   return    !CaseInsensitiveLess()(currentValue, s)
  140.          && !CaseInsensitiveLess()(s, currentValue);
  141. }
  142.  
  143.  
  144. /// operator<<() inits options and assigns idx in the correct printing order
  145.  
  146. void Option::operator<<(const Option& o) {
  147.  
  148.   static size_t insert_order = 0;
  149.  
  150.   *this = o;
  151.   idx = insert_order++;
  152. }
  153.  
  154.  
  155. /// operator=() updates currentValue and triggers on_change() action. It's up to
  156. /// the GUI to check for option's limits, but we could receive the new value from
  157. /// the user by console window, so let's check the bounds anyway.
  158.  
  159. Option& Option::operator=(const string& v) {
  160.  
  161.   assert(!type.empty());
  162.  
  163.   if (   (type != "button" && v.empty())
  164.       || (type == "check" && v != "true" && v != "false")
  165.       || (type == "spin" && (stof(v) < min || stof(v) > max)))
  166.       return *this;
  167.  
  168.   if (type != "button")
  169.       currentValue = v;
  170.  
  171.   if (on_change)
  172.       on_change(*this);
  173.  
  174.   return *this;
  175. }
  176.  
  177. } // namespace UCI
  178.