2 Stockfish, a UCI chess playing engine derived from Glaurung 2.1
3 Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
4 Copyright (C) 2008-2010 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/>.
26 #include "ucioption.h"
32 OptionsMap Options; // Global object
35 // Our case insensitive less() function as required by UCI protocol
36 bool CaseInsensitiveLess::operator() (const string& s1, const string& s2) const {
41 while (i < s1.size() && i < s2.size())
44 c2 = tolower(s2[i++]);
49 return s1.size() < s2.size();
53 // An helper to convert an integer value to a std::string
54 static string int_to_string(int v) {
56 std::ostringstream ss;
62 /// OptionsMap c'tor initializes the UCI options to their hard coded default
63 /// values and initializes the default value of "Threads" and "Minimum Split Depth"
64 /// parameters according to the number of CPU cores.
66 OptionsMap::OptionsMap() {
68 OptionsMap& o = *this;
70 o["Use Search Log"] = UCIOption(false);
71 o["Search Log Filename"] = UCIOption("SearchLog.txt");
72 o["Book File"] = UCIOption("book.bin");
73 o["Best Book Move"] = UCIOption(false);
74 o["Mobility (Middle Game)"] = UCIOption(100, 0, 200);
75 o["Mobility (Endgame)"] = UCIOption(100, 0, 200);
76 o["Passed Pawns (Middle Game)"] = UCIOption(100, 0, 200);
77 o["Passed Pawns (Endgame)"] = UCIOption(100, 0, 200);
78 o["Space"] = UCIOption(100, 0, 200);
79 o["Aggressiveness"] = UCIOption(100, 0, 200);
80 o["Cowardice"] = UCIOption(100, 0, 200);
81 o["Minimum Split Depth"] = UCIOption(4, 4, 7);
82 o["Maximum Number of Threads per Split Point"] = UCIOption(5, 4, 8);
83 o["Threads"] = UCIOption(1, 1, MAX_THREADS);
84 o["Use Sleeping Threads"] = UCIOption(true);
85 o["Hash"] = UCIOption(32, 4, 8192);
86 o["Clear Hash"] = UCIOption(false, "button");
87 o["Ponder"] = UCIOption(true);
88 o["OwnBook"] = UCIOption(true);
89 o["MultiPV"] = UCIOption(1, 1, 500);
90 o["Skill Level"] = UCIOption(20, 0, 20);
91 o["Emergency Move Horizon"] = UCIOption(40, 0, 50);
92 o["Emergency Base Time"] = UCIOption(200, 0, 30000);
93 o["Emergency Move Time"] = UCIOption(70, 0, 5000);
94 o["Minimum Thinking Time"] = UCIOption(20, 0, 5000);
95 o["UCI_Chess960"] = UCIOption(false);
96 o["UCI_AnalyseMode"] = UCIOption(false);
98 // Set some SMP parameters accordingly to the detected CPU count
99 UCIOption& thr = o["Threads"];
100 UCIOption& msd = o["Minimum Split Depth"];
102 thr.defaultValue = thr.currentValue = int_to_string(cpu_count());
104 if (cpu_count() >= 8)
105 msd.defaultValue = msd.currentValue = int_to_string(7);
109 /// OptionsMap::print_all() returns a string with all the UCI options in chronological
110 /// insertion order (the idx field) and in the format defined by the UCI protocol.
112 string OptionsMap::print_all() const {
116 for (size_t i = 0; i <= size(); i++)
117 for (OptionsMap::const_iterator it = begin(); it != end(); ++it)
118 if (it->second.idx == i)
120 const UCIOption& o = it->second;
121 s << "\noption name " << it->first << " type " << o.type;
123 if (o.type != "button")
124 s << " default " << o.defaultValue;
126 if (o.type == "spin")
127 s << " min " << o.minValue << " max " << o.maxValue;
135 /// Option class c'tors
137 UCIOption::UCIOption(const char* def) : type("string"), minValue(0), maxValue(0), idx(Options.size())
138 { defaultValue = currentValue = def; }
140 UCIOption::UCIOption(bool def, string t) : type(t), minValue(0), maxValue(0), idx(Options.size())
141 { defaultValue = currentValue = (def ? "true" : "false"); }
143 UCIOption::UCIOption(int def, int minv, int maxv) : type("spin"), minValue(minv), maxValue(maxv), idx(Options.size())
144 { defaultValue = currentValue = int_to_string(def); }
147 /// set_value() updates currentValue of the Option object. Normally it's up to
148 /// the GUI to check for option's limits, but we could receive the new value
149 /// directly from the user by teminal window. So let's check the bounds anyway.
151 void UCIOption::set_value(const string& v) {
153 assert(!type.empty());
158 if ((type == "check" || type == "button") != (v == "true" || v == "false"))
163 int val = atoi(v.c_str());
164 if (val < minValue || val > maxValue)