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 // stringify() converts a numeric value of type T to a std::string
55 static string stringify(const T& v) {
57 std::ostringstream ss;
63 /// init_uci_options() initializes the UCI options to their hard coded default
64 /// values and initializes the default value of "Threads" and "Minimum Split Depth"
65 /// parameters according to the number of CPU cores.
67 void init_uci_options() {
69 Options["Use Search Log"] = Option(false);
70 Options["Search Log Filename"] = Option("SearchLog.txt");
71 Options["Book File"] = Option("book.bin");
72 Options["Best Book Move"] = Option(false);
73 Options["Mobility (Middle Game)"] = Option(100, 0, 200);
74 Options["Mobility (Endgame)"] = Option(100, 0, 200);
75 Options["Pawn Structure (Middle Game)"] = Option(100, 0, 200);
76 Options["Pawn Structure (Endgame)"] = Option(100, 0, 200);
77 Options["Passed Pawns (Middle Game)"] = Option(100, 0, 200);
78 Options["Passed Pawns (Endgame)"] = Option(100, 0, 200);
79 Options["Space"] = Option(100, 0, 200);
80 Options["Aggressiveness"] = Option(100, 0, 200);
81 Options["Cowardice"] = Option(100, 0, 200);
82 Options["Check Extension (PV nodes)"] = Option(2, 0, 2);
83 Options["Check Extension (non-PV nodes)"] = Option(1, 0, 2);
84 Options["Single Evasion Extension (PV nodes)"] = Option(2, 0, 2);
85 Options["Single Evasion Extension (non-PV nodes)"] = Option(2, 0, 2);
86 Options["Mate Threat Extension (PV nodes)"] = Option(2, 0, 2);
87 Options["Mate Threat Extension (non-PV nodes)"] = Option(2, 0, 2);
88 Options["Pawn Push to 7th Extension (PV nodes)"] = Option(1, 0, 2);
89 Options["Pawn Push to 7th Extension (non-PV nodes)"] = Option(1, 0, 2);
90 Options["Passed Pawn Extension (PV nodes)"] = Option(1, 0, 2);
91 Options["Passed Pawn Extension (non-PV nodes)"] = Option(0, 0, 2);
92 Options["Pawn Endgame Extension (PV nodes)"] = Option(2, 0, 2);
93 Options["Pawn Endgame Extension (non-PV nodes)"] = Option(2, 0, 2);
94 Options["Minimum Split Depth"] = Option(4, 4, 7);
95 Options["Maximum Number of Threads per Split Point"] = Option(5, 4, 8);
96 Options["Threads"] = Option(1, 1, MAX_THREADS);
97 Options["Use Sleeping Threads"] = Option(false);
98 Options["Hash"] = Option(32, 4, 8192);
99 Options["Clear Hash"] = Option(false, "button");
100 Options["Ponder"] = Option(true);
101 Options["OwnBook"] = Option(true);
102 Options["MultiPV"] = Option(1, 1, 500);
103 Options["Emergency Move Horizon"] = Option(40, 0, 50);
104 Options["Emergency Base Time"] = Option(200, 0, 60000);
105 Options["Emergency Move Time"] = Option(70, 0, 5000);
106 Options["Minimum Thinking Time"] = Option(20, 0, 5000);
107 Options["UCI_Chess960"] = Option(false); // Just a dummy but needed by GUIs
108 Options["UCI_AnalyseMode"] = Option(false);
110 // Set some SMP parameters accordingly to the detected CPU count
111 Option& thr = Options["Threads"];
112 Option& msd = Options["Minimum Split Depth"];
114 thr.defaultValue = thr.currentValue = stringify(cpu_count());
116 if (cpu_count() >= 8)
117 msd.defaultValue = msd.currentValue = stringify(7);
121 /// print_uci_options() prints all the UCI options to the standard output,
122 /// in chronological insertion order (the idx field) and in the format
123 /// defined by the UCI protocol.
125 void print_uci_options() {
127 for (size_t i = 0; i <= Options.size(); i++)
128 for (OptionsMap::const_iterator it = Options.begin(); it != Options.end(); ++it)
129 if (it->second.idx == i)
131 const Option& o = it->second;
132 cout << "\noption name " << it->first << " type " << o.type;
134 if (o.type != "button")
135 cout << " default " << o.defaultValue;
137 if (o.type == "spin")
138 cout << " min " << o.minValue << " max " << o.maxValue;
146 /// Option class c'tors
148 Option::Option(const char* def) : type("string"), idx(Options.size()), minValue(0), maxValue(0)
149 { defaultValue = currentValue = def; }
151 Option::Option(bool def, string t) : type(t), idx(Options.size()), minValue(0), maxValue(0)
152 { defaultValue = currentValue = (def ? "true" : "false"); }
154 Option::Option(int def, int minv, int maxv) : type("spin"), idx(Options.size()), minValue(minv), maxValue(maxv)
155 { defaultValue = currentValue = stringify(def); }
158 /// set_value() updates currentValue of the Option object. Normally it's up to
159 /// the GUI to check for option's limits, but we could receive the new value
160 /// directly from the user by teminal window. So let's check the bounds anyway.
162 void Option::set_value(const string& value) {
164 assert(!type.empty());
166 if ( (type == "check" || type == "button")
167 && !(value == "true" || value == "false"))
172 int v = atoi(value.c_str());
173 if (v < minValue || v > maxValue)
177 currentValue = value;