2 Stockfish, a UCI chess playing engine derived from Glaurung 2.1
3 Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
4 Copyright (C) 2008-2014 Marco Costalba, Joona Kiiski, Tord Romstad
6 Stockfish is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 Stockfish is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
31 #include "syzygy/tbprobe.h"
36 UCI::OptionsMap Options; // Global object
40 /// 'On change' actions, triggered by an option's value change
41 void on_logger(const Option& o) { start_logger(o); }
42 void on_threads(const Option&) { Threads.read_uci_options(); }
43 void on_hash_size(const Option& o) { TT.resize(o); }
44 void on_clear_hash(const Option&) { TT.clear(); }
46 void on_tb_path(const Option& o) { Tablebases::init(o); }
50 /// Our case insensitive less() function as required by UCI protocol
51 bool ci_less(char c1, char c2) { return tolower(c1) < tolower(c2); }
53 bool CaseInsensitiveLess::operator() (const string& s1, const string& s2) const {
54 return std::lexicographical_compare(s1.begin(), s1.end(), s2.begin(), s2.end(), ci_less);
58 /// init() initializes the UCI options to their hard-coded default values
60 void init(OptionsMap& o) {
62 o["Write Debug Log"] << Option(false, on_logger);
63 o["Contempt"] << Option(0, -100, 100);
64 o["Min Split Depth"] << Option(0, 0, 12, on_threads);
65 o["Threads"] << Option(1, 1, MAX_THREADS, on_threads);
66 o["Hash"] << Option(16, 1, 1024 * 1024, on_hash_size);
67 o["Clear Hash"] << Option(on_clear_hash);
68 o["Ponder"] << Option(true);
69 o["MultiPV"] << Option(1, 1, 500);
70 o["Skill Level"] << Option(20, 0, 20);
71 o["Move Overhead"] << Option(30, 0, 5000);
72 o["Minimum Thinking Time"] << Option(20, 0, 5000);
73 o["Slow Mover"] << Option(80, 10, 1000);
74 o["UCI_Chess960"] << 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(6, 0, 6);
84 /// operator<<() is used to print all the options default values in chronological
85 /// insertion order (the idx field) and in the format defined by the UCI protocol.
87 std::ostream& operator<<(std::ostream& os, const OptionsMap& om) {
89 for (size_t idx = 0; idx < om.size(); ++idx)
90 for (OptionsMap::const_iterator it = om.begin(); it != om.end(); ++it)
91 if (it->second.idx == idx)
93 const Option& o = it->second;
94 os << "\noption name " << it->first << " type " << o.type;
96 if (o.type != "button")
97 os << " default " << o.defaultValue;
100 os << " min " << o.min << " max " << o.max;
108 /// Option class constructors and conversion operators
110 Option::Option(const char* v, OnChange f) : type("string"), min(0), max(0), on_change(f)
111 { defaultValue = currentValue = v; }
113 Option::Option(bool v, OnChange f) : type("check"), min(0), max(0), on_change(f)
114 { defaultValue = currentValue = (v ? "true" : "false"); }
116 Option::Option(OnChange f) : type("button"), min(0), max(0), on_change(f)
119 Option::Option(int v, int minv, int maxv, OnChange f) : type("spin"), min(minv), max(maxv), on_change(f)
120 { std::ostringstream ss; ss << v; defaultValue = currentValue = ss.str(); }
123 Option::operator int() const {
124 assert(type == "check" || type == "spin");
125 return (type == "spin" ? atoi(currentValue.c_str()) : currentValue == "true");
128 Option::operator std::string() const {
129 assert(type == "string");
134 /// operator<<() inits options and assigns idx in the correct printing order
136 void Option::operator<<(const Option& o) {
138 static size_t insert_order = 0;
141 idx = insert_order++;
145 /// operator=() updates currentValue and triggers on_change() action. It's up to
146 /// the GUI to check for option's limits, but we could receive the new value from
147 /// the user by console window, so let's check the bounds anyway.
149 Option& Option::operator=(const string& v) {
151 assert(!type.empty());
153 if ( (type != "button" && v.empty())
154 || (type == "check" && v != "true" && v != "false")
155 || (type == "spin" && (atoi(v.c_str()) < min || atoi(v.c_str()) > max)))
158 if (type != "button")