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) 2015-2016 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
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.
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.
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/>.
30 #include "syzygy/tbprobe.h"
34 UCI::OptionsMap Options; // Global object
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&) { Threads.read_uci_options(); }
43 void on_tb_path(const Option& o) { Tablebases::init(o); }
46 /// Our case insensitive less() function as required by UCI protocol
47 bool CaseInsensitiveLess::operator() (const string& s1, const string& s2) const {
49 return std::lexicographical_compare(s1.begin(), s1.end(), s2.begin(), s2.end(),
50 [](char c1, char c2) { return tolower(c1) < tolower(c2); });
54 /// init() initializes the UCI options to their hard-coded default values
56 void init(OptionsMap& o) {
58 const int MaxHashMB = Is64Bit ? 1024 * 1024 : 2048;
60 o["Debug Log File"] << Option("", on_logger);
61 o["Contempt"] << Option(0, -100, 100);
62 o["Threads"] << Option(1, 1, 128, on_threads);
63 o["Hash"] << Option(16, 1, MaxHashMB, on_hash_size);
64 o["Clear Hash"] << Option(on_clear_hash);
65 o["Ponder"] << Option(false);
66 o["MultiPV"] << Option(1, 1, 500);
67 o["Skill Level"] << Option(20, 0, 20);
68 o["Move Overhead"] << Option(30, 0, 5000);
69 o["Minimum Thinking Time"] << Option(20, 0, 5000);
70 o["Slow Mover"] << Option(89, 10, 1000);
71 o["nodestime"] << Option(0, 0, 10000);
72 o["UCI_Chess960"] << Option(false);
73 o["SyzygyPath"] << Option("<empty>", on_tb_path);
74 o["SyzygyProbeDepth"] << Option(1, 1, 100);
75 o["Syzygy50MoveRule"] << Option(true);
76 o["SyzygyProbeLimit"] << Option(6, 0, 6);
80 /// operator<<() is used to print all the options default values in chronological
81 /// insertion order (the idx field) and in the format defined by the UCI protocol.
83 std::ostream& operator<<(std::ostream& os, const OptionsMap& om) {
85 for (size_t idx = 0; idx < om.size(); ++idx)
86 for (const auto& it : om)
87 if (it.second.idx == idx)
89 const Option& o = it.second;
90 os << "\noption name " << it.first << " type " << o.type;
92 if (o.type != "button")
93 os << " default " << o.defaultValue;
96 os << " min " << o.min << " max " << o.max;
105 /// Option class constructors and conversion operators
107 Option::Option(const char* v, OnChange f) : type("string"), min(0), max(0), on_change(f)
108 { defaultValue = currentValue = v; }
110 Option::Option(bool v, OnChange f) : type("check"), min(0), max(0), on_change(f)
111 { defaultValue = currentValue = (v ? "true" : "false"); }
113 Option::Option(OnChange f) : type("button"), min(0), max(0), on_change(f)
116 Option::Option(int v, int minv, int maxv, OnChange f) : type("spin"), min(minv), max(maxv), on_change(f)
117 { defaultValue = currentValue = std::to_string(v); }
119 Option::operator int() const {
120 assert(type == "check" || type == "spin");
121 return (type == "spin" ? stoi(currentValue) : currentValue == "true");
124 Option::operator std::string() const {
125 assert(type == "string");
130 /// operator<<() inits options and assigns idx in the correct printing order
132 void Option::operator<<(const Option& o) {
134 static size_t insert_order = 0;
137 idx = insert_order++;
141 /// operator=() updates currentValue and triggers on_change() action. It's up to
142 /// the GUI to check for option's limits, but we could receive the new value from
143 /// the user by console window, so let's check the bounds anyway.
145 Option& Option::operator=(const string& v) {
147 assert(!type.empty());
149 if ( (type != "button" && v.empty())
150 || (type == "check" && v != "true" && v != "false")
151 || (type == "spin" && (stoi(v) < min || stoi(v) > max)))
154 if (type != "button")