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) 2015-2020 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/>.
31 #include "syzygy/tbprobe.h"
35 UCI::OptionsMap Options; // Global object
39 /// 'On change' actions, triggered by an option's value change
40 void on_clear_hash(const Option&) { Search::clear(); }
41 void on_hash_size(const Option& o) { TT.resize(size_t(o)); }
42 void on_logger(const Option& o) { start_logger(o); }
43 void on_threads(const Option& o) { Threads.set(size_t(o)); }
44 void on_tb_path(const Option& o) { Tablebases::init(o); }
47 /// Our case insensitive less() function as required by UCI protocol
48 bool CaseInsensitiveLess::operator() (const string& s1, const string& s2) const {
50 return std::lexicographical_compare(s1.begin(), s1.end(), s2.begin(), s2.end(),
51 [](char c1, char c2) { return tolower(c1) < tolower(c2); });
55 /// init() initializes the UCI options to their hard-coded default values
57 void init(OptionsMap& o) {
59 // at most 2^32 clusters.
60 constexpr int MaxHashMB = Is64Bit ? 131072 : 2048;
62 o["Debug Log File"] << Option("", on_logger);
63 o["Contempt"] << Option(24, -100, 100);
64 o["Analysis Contempt"] << Option("Both var Off var White var Black var Both", "Both");
65 o["Threads"] << Option(1, 1, 512, on_threads);
66 o["Hash"] << Option(16, 1, MaxHashMB, on_hash_size);
67 o["Clear Hash"] << Option(on_clear_hash);
68 o["Ponder"] << Option(false);
69 o["MultiPV"] << Option(1, 1, 500);
70 o["Skill Level"] << Option(20, 0, 20);
71 o["Move Overhead"] << Option(10, 0, 5000);
72 o["Minimum Thinking Time"] << Option( 0, 0, 5000);
73 o["Slow Mover"] << Option(100, 10, 1000);
74 o["nodestime"] << Option(0, 0, 10000);
75 o["UCI_Chess960"] << Option(false);
76 o["UCI_AnalyseMode"] << Option(false);
77 o["UCI_LimitStrength"] << Option(false);
78 o["UCI_Elo"] << Option(1350, 1350, 2850);
79 o["SyzygyPath"] << Option("<empty>", on_tb_path);
80 o["SyzygyProbeDepth"] << Option(1, 1, 100);
81 o["Syzygy50MoveRule"] << Option(true);
82 o["SyzygyProbeLimit"] << Option(7, 0, 7);
86 /// operator<<() is used to print all the options default values in chronological
87 /// insertion order (the idx field) and in the format defined by the UCI protocol.
89 std::ostream& operator<<(std::ostream& os, const OptionsMap& om) {
91 for (size_t idx = 0; idx < om.size(); ++idx)
92 for (const auto& it : om)
93 if (it.second.idx == idx)
95 const Option& o = it.second;
96 os << "\noption name " << it.first << " type " << o.type;
98 if (o.type == "string" || o.type == "check" || o.type == "combo")
99 os << " default " << o.defaultValue;
101 if (o.type == "spin")
102 os << " default " << int(stof(o.defaultValue))
113 /// Option class constructors and conversion operators
115 Option::Option(const char* v, OnChange f) : type("string"), min(0), max(0), on_change(f)
116 { defaultValue = currentValue = v; }
118 Option::Option(bool v, OnChange f) : type("check"), min(0), max(0), on_change(f)
119 { defaultValue = currentValue = (v ? "true" : "false"); }
121 Option::Option(OnChange f) : type("button"), min(0), max(0), on_change(f)
124 Option::Option(double v, int minv, int maxv, OnChange f) : type("spin"), min(minv), max(maxv), on_change(f)
125 { defaultValue = currentValue = std::to_string(v); }
127 Option::Option(const char* v, const char* cur, OnChange f) : type("combo"), min(0), max(0), on_change(f)
128 { defaultValue = v; currentValue = cur; }
130 Option::operator double() const {
131 assert(type == "check" || type == "spin");
132 return (type == "spin" ? stof(currentValue) : currentValue == "true");
135 Option::operator std::string() const {
136 assert(type == "string");
140 bool Option::operator==(const char* s) const {
141 assert(type == "combo");
142 return !CaseInsensitiveLess()(currentValue, s)
143 && !CaseInsensitiveLess()(s, currentValue);
147 /// operator<<() inits options and assigns idx in the correct printing order
149 void Option::operator<<(const Option& o) {
151 static size_t insert_order = 0;
154 idx = insert_order++;
158 /// operator=() updates currentValue and triggers on_change() action. It's up to
159 /// the GUI to check for option's limits, but we could receive the new value
160 /// from the user by console window, so let's check the bounds anyway.
162 Option& Option::operator=(const string& v) {
164 assert(!type.empty());
166 if ( (type != "button" && v.empty())
167 || (type == "check" && v != "true" && v != "false")
168 || (type == "spin" && (stof(v) < min || stof(v) > max)))
173 OptionsMap comboMap; // To have case insensitive compare
175 std::istringstream ss(defaultValue);
177 comboMap[token] << Option();
178 if (!comboMap.count(v) || v == "var")
182 if (type != "button")