271 lines
9.3 KiB
C++
271 lines
9.3 KiB
C++
/*
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Glaurung, a UCI chess playing engine.
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Copyright (C) 2004-2008 Tord Romstad
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Glaurung is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Glaurung is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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////
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//// Includes
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////
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#include <cassert>
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#include <cstdarg>
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#include <cstdio>
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#include "misc.h"
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#include "thread.h"
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#include "ucioption.h"
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////
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//// Variables
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////
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bool Chess960 = false;
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////
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//// Local definitions
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////
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namespace {
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///
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/// Types
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///
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enum OptionType { SPIN, COMBO, CHECK, STRING, BUTTON, OPTION_TYPE_NONE};
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struct Option {
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char name[50], defaultValue[300], currentValue[300];
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OptionType type;
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int minValue, maxValue;
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char comboValues[8][64];
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};
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///
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/// Variables
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///
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Option Options[] = {
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{ "Use Search Log", "false", "false", CHECK, 0, 0, {""} },
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{ "Search Log Filename", "SearchLog.txt", "SearchLog.txt", STRING, 0, 0, {""} },
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{ "Book File", "book.bin", "book.bin", STRING, 0, 0, {""} },
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{ "Mobility (Middle Game)", "100", "100", SPIN, 0, 200, {""} },
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{ "Mobility (Endgame)", "100", "100", SPIN, 0, 200, {""} },
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{ "Pawn Structure (Middle Game)", "100", "100", SPIN, 0, 200, {""} },
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{ "Pawn Structure (Endgame)", "100", "100", SPIN, 0, 200, {""} },
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{ "Passed Pawns (Middle Game)", "100", "100", SPIN, 0, 200, {""} },
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{ "Passed Pawns (Endgame)", "100", "100", SPIN, 0, 200, {""} },
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{ "Aggressiveness", "100", "100", SPIN, 0, 200, {""} },
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{ "Cowardice", "100", "100", SPIN, 0, 200, {""} },
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{ "King Safety Curve", "Quadratic", "Quadratic", COMBO, 0, 0,
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{ "Quadratic", "Linear" /*, "From File"*/ } },
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{ "King Safety Coefficient", "40", "40", SPIN, 1, 100 , {""} },
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{ "King Safety X Intercept", "0", "0", SPIN, 0, 20, {""} },
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{ "King Safety Max Slope", "30", "30", SPIN, 10, 100, {""} },
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{ "King Safety Max Value", "500", "500", SPIN, 100, 1000, {""} },
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{ "Queen Contact Check Bonus", "4", "4", SPIN, 0, 8, {""} },
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{ "Rook Contact Check Bonus", "2", "2", SPIN, 0, 4, {""} },
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{ "Queen Check Bonus", "2", "2", SPIN, 0, 4, {""} },
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{ "Rook Check Bonus", "1", "1", SPIN, 0, 4, {""} },
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{ "Bishop Check Bonus", "1", "1", SPIN, 0, 4, {""} },
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{ "Knight Check Bonus", "1", "1", SPIN, 0, 4, {""} },
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{ "Discovered Check Bonus", "3", "3", SPIN, 0, 8, {""} },
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{ "Mate Threat Bonus", "3", "3", SPIN, 0, 8, {""} },
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{ "Check Extension (PV nodes)", "2", "2", SPIN, 0, 2, {""} },
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{ "Check Extension (non-PV nodes)", "1", "1", SPIN, 0, 2, {""} },
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{ "Single Reply Extension (PV nodes)", "2", "2", SPIN, 0, 2, {""} },
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{ "Single Reply Extension (non-PV nodes)", "2", "2", SPIN, 0, 2, {""} },
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{ "Mate Threat Extension (PV nodes)", "0", "0", SPIN, 0, 2, {""} },
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{ "Mate Threat Extension (non-PV nodes)", "0", "0", SPIN, 0, 2, {""} },
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{ "Pawn Push to 7th Extension (PV nodes)", "1", "1", SPIN, 0, 2, {""} },
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{ "Pawn Push to 7th Extension (non-PV nodes)", "1", "1", SPIN, 0, 2, {""} },
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{ "Passed Pawn Extension (PV nodes)", "1", "1", SPIN, 0, 2, {""} },
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{ "Passed Pawn Extension (non-PV nodes)", "0", "0", SPIN, 0, 2, {""} },
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{ "Pawn Endgame Extension (PV nodes)", "2", "2", SPIN, 0, 2, {""} },
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{ "Pawn Endgame Extension (non-PV nodes)", "2", "2", SPIN, 0, 2, {""} },
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{ "Full Depth Moves (PV nodes)", "14", "14", SPIN, 1, 100, {""} },
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{ "Full Depth Moves (non-PV nodes)", "3", "3", SPIN, 1, 100, {""} },
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{ "Threat Depth", "5", "5", SPIN, 0, 100, {""} },
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{ "Selective Plies", "7", "7", SPIN, 0, 10, {""} },
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{ "Futility Pruning (Main Search)", "true", "true", CHECK, 0, 0, {""} },
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{ "Futility Pruning (Quiescence Search)", "true", "true", CHECK, 0, 0, {""} },
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{ "Futility Margin 0", "50", "50", SPIN, 0, 1000, {""} },
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{ "Futility Margin 1", "100", "100", SPIN, 0, 1000, {""} },
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{ "Futility Margin 2", "300", "300", SPIN, 0, 1000, {""} },
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{ "Maximum Razoring Depth", "3", "3", SPIN, 0, 4, {""} },
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{ "Razoring Margin", "300", "300", SPIN, 150, 600, {""} },
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{ "Randomness", "0", "0", SPIN, 0, 10, {""} },
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{ "Minimum Split Depth", "4", "4", SPIN, 4, 7, {""} },
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{ "Maximum Number of Threads per Split Point", "5", "5", SPIN, 4, 8, {""} },
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{ "Threads", "1", "1", SPIN, 1, 8, {""} },
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{ "Hash", "32", "32", SPIN, 4, 4096, {""} },
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{ "Clear Hash", "false", "false", BUTTON, 0, 0, {""} },
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{ "Ponder", "true", "true", CHECK, 0, 0, {""} },
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{ "OwnBook", "true", "true", CHECK, 0, 0, {""} },
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{ "MultiPV", "1", "1", SPIN, 1, 500, {""} },
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{ "UCI_ShowCurrLine", "false", "false", CHECK, 0, 0, {""} },
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{ "UCI_Chess960", "false", "false", CHECK, 0, 0, {""} },
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{ "", "", "", OPTION_TYPE_NONE, 0, 0, {""}}
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};
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///
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/// Functions
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///
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Option *option_with_name(const char *optionName);
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}
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////
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//// Functions
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////
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/// init_uci_options() initializes the UCI options. Currently, the only
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/// thing this function does is to initialize the default value of the
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/// "Threads" parameter to the number of available CPU cores.
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void init_uci_options() {
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Option *o;
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o = option_with_name("Threads");
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assert(o != NULL);
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// Limit the default value of "Threads" to 7 even if we have 8 CPU cores.
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// According to Ken Dail's tests, Glaurung plays much better with 7 than
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// with 8 threads. This is weird, but it is probably difficult to find out
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// why before I have a 8-core computer to experiment with myself.
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sprintf(o->defaultValue, "%d", Min(cpu_count(), 7));
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sprintf(o->currentValue, "%d", Min(cpu_count(), 7));
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// Increase the minimum split depth when the number of CPUs is big.
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// It would probably be better to let this depend on the number of threads
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// instead.
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o = option_with_name("Minimum Split Depth");
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assert(o != NULL);
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if(cpu_count() > 4) {
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sprintf(o->defaultValue, "%d", 6);
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sprintf(o->defaultValue, "%d", 6);
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}
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}
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/// print_uci_options() prints all the UCI options to the standard output,
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/// in the format defined by the UCI protocol.
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void print_uci_options() {
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static const char optionTypeName[][16] = {
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"spin", "combo", "check", "string", "button"
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};
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for(Option *o = Options; o->type != OPTION_TYPE_NONE; o++) {
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printf("option name %s type %s", o->name, optionTypeName[o->type]);
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if(o->type != BUTTON) {
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printf(" default %s", o->defaultValue);
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if(o->type == SPIN)
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printf(" min %d max %d", o->minValue, o->maxValue);
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else if(o->type == COMBO)
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for(int i = 0; strlen(o->comboValues[i]) > 0; i++)
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printf(" var %s", o->comboValues[i]);
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}
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printf("\n");
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}
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}
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/// get_option_value_bool() returns the current value of a UCI parameter of
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/// type "check".
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bool get_option_value_bool(const std::string &optionName) {
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Option *o = option_with_name(optionName.c_str());
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return o != NULL && strcmp(o->currentValue, "true") == 0;
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}
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/// get_option_value_int() returns the value of a UCI parameter as an integer.
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/// Normally, this function will be used for a parameter of type "spin", but
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/// it could also be used with a "combo" parameter, where all the available
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/// values are integers.
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int get_option_value_int(const std::string &optionName) {
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Option *o = option_with_name(optionName.c_str());
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return atoi(o->currentValue);
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}
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/// get_option_value_string() returns the current value of a UCI parameter as
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/// a string. It is used with parameters of type "combo" and "string".
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const std::string get_option_value_string(const std::string &optionName) {
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Option *o = option_with_name(optionName.c_str());
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return o->currentValue;
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}
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/// button_was_pressed() tests whether a UCI parameter of type "button" has
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/// been selected since the last time the function was called.
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bool button_was_pressed(const std::string &buttonName) {
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if(get_option_value_bool(buttonName)) {
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set_option_value(buttonName, "false");
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return true;
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}
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else
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return false;
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}
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/// set_option_value() inserts a new value for a UCI parameter. Note that
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/// the function does not check that the new value is legal for the given
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/// parameter: This is assumed to be the responsibility of the GUI.
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void set_option_value(const std::string &optionName,
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const std::string &newValue) {
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Option *o = option_with_name(optionName.c_str());
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if(o != NULL)
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strcpy(o->currentValue, newValue.c_str());
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else
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std::cout << "No such option: " << optionName << std::endl;
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}
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/// push_button() is used to tell the engine that a UCI parameter of type
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/// "button" has been selected:
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void push_button(const std::string &buttonName) {
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set_option_value(buttonName, "true");
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}
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namespace {
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// option_with_name() tries to find a UCI option with a given
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// name. It returns a pointer to the UCI option or the null pointer,
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// depending on whether an option with the given name exists.
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Option *option_with_name(const char *optionName) {
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for(Option *o = Options; o->type != OPTION_TYPE_NONE; o++)
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if(strcmp(o->name, optionName) == 0)
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return o;
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return NULL;
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}
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}
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