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/>.
25 #include "ucioption.h"
29 OptionsMap Options; // Global object
32 // Our case insensitive less() function as required by UCI protocol
33 static bool ci_less(char c1, char c2) { return tolower(c1) < tolower(c2); }
35 bool CaseInsensitiveLess::operator() (const string& s1, const string& s2) const {
36 return lexicographical_compare(s1.begin(), s1.end(), s2.begin(), s2.end(), ci_less);
40 // An helper to convert an integer value to a std::string
41 static string int_to_string(int v) {
43 std::ostringstream ss;
49 /// OptionsMap c'tor initializes the UCI options to their hard coded default
50 /// values and initializes the default value of "Threads" and "Minimum Split Depth"
51 /// parameters according to the number of CPU cores.
53 OptionsMap::OptionsMap() {
55 OptionsMap& o = *this;
57 o["Use Search Log"] = UCIOption(false);
58 o["Search Log Filename"] = UCIOption("SearchLog.txt");
59 o["Book File"] = UCIOption("book.bin");
60 o["Best Book Move"] = UCIOption(false);
61 o["Mobility (Middle Game)"] = UCIOption(100, 0, 200);
62 o["Mobility (Endgame)"] = UCIOption(100, 0, 200);
63 o["Passed Pawns (Middle Game)"] = UCIOption(100, 0, 200);
64 o["Passed Pawns (Endgame)"] = UCIOption(100, 0, 200);
65 o["Space"] = UCIOption(100, 0, 200);
66 o["Aggressiveness"] = UCIOption(100, 0, 200);
67 o["Cowardice"] = UCIOption(100, 0, 200);
68 o["Minimum Split Depth"] = UCIOption(4, 4, 7);
69 o["Maximum Number of Threads per Split Point"] = UCIOption(5, 4, 8);
70 o["Threads"] = UCIOption(1, 1, MAX_THREADS);
71 o["Use Sleeping Threads"] = UCIOption(true);
72 o["Hash"] = UCIOption(32, 4, 8192);
73 o["Clear Hash"] = UCIOption(false, "button");
74 o["Ponder"] = UCIOption(true);
75 o["OwnBook"] = UCIOption(true);
76 o["MultiPV"] = UCIOption(1, 1, 500);
77 o["Skill Level"] = UCIOption(20, 0, 20);
78 o["Emergency Move Horizon"] = UCIOption(40, 0, 50);
79 o["Emergency Base Time"] = UCIOption(200, 0, 30000);
80 o["Emergency Move Time"] = UCIOption(70, 0, 5000);
81 o["Minimum Thinking Time"] = UCIOption(20, 0, 5000);
82 o["UCI_Chess960"] = UCIOption(false);
83 o["UCI_AnalyseMode"] = UCIOption(false);
85 // Set some SMP parameters accordingly to the detected CPU count
86 UCIOption& thr = o["Threads"];
87 UCIOption& msd = o["Minimum Split Depth"];
89 thr.defaultValue = thr.currentValue = int_to_string(cpu_count());
92 msd.defaultValue = msd.currentValue = int_to_string(7);
96 /// OptionsMap::print_all() returns a string with all the UCI options in chronological
97 /// insertion order (the idx field) and in the format defined by the UCI protocol.
99 string OptionsMap::print_all() const {
103 for (size_t i = 0; i <= size(); i++)
104 for (OptionsMap::const_iterator it = begin(); it != end(); ++it)
105 if (it->second.idx == i)
107 const UCIOption& o = it->second;
108 s << "\noption name " << it->first << " type " << o.type;
110 if (o.type != "button")
111 s << " default " << o.defaultValue;
113 if (o.type == "spin")
114 s << " min " << o.minValue << " max " << o.maxValue;
122 /// Option class c'tors
124 UCIOption::UCIOption(const char* def) : type("string"), minValue(0), maxValue(0), idx(Options.size())
125 { defaultValue = currentValue = def; }
127 UCIOption::UCIOption(bool def, string t) : type(t), minValue(0), maxValue(0), idx(Options.size())
128 { defaultValue = currentValue = (def ? "true" : "false"); }
130 UCIOption::UCIOption(int def, int minv, int maxv) : type("spin"), minValue(minv), maxValue(maxv), idx(Options.size())
131 { defaultValue = currentValue = int_to_string(def); }
134 /// set_value() updates currentValue of the Option object. Normally it's up to
135 /// the GUI to check for option's limits, but we could receive the new value
136 /// directly from the user by teminal window. So let's check the bounds anyway.
138 void UCIOption::set_value(const string& v) {
140 assert(!type.empty());
145 if ((type == "check" || type == "button") != (v == "true" || v == "false"))
150 int val = atoi(v.c_str());
151 if (val < minValue || val > maxValue)