--- /dev/null
+/*
+ Stockfish, a UCI chess playing engine derived from Glaurung 2.1
+ Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
+ Copyright (C) 2008-2017 Marco Costalba, Joona Kiiski, Tord Romstad
+ Copyright (C) 2015-2018 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
+
+ Stockfish is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Stockfish is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef TUNE_H_INCLUDED
+#define TUNE_H_INCLUDED
+
+#include <memory>
+#include <string>
+#include <type_traits>
+#include <vector>
+
+typedef std::pair<int, int> Range; // Option's min-max values
+typedef Range (RangeFun) (int);
+
+// Default Range function, to calculate Option's min-max values
+inline Range default_range(int v) {
+ return v > 0 ? Range(0, 2 * v) : Range(2 * v, 0);
+}
+
+struct SetRange {
+ explicit SetRange(RangeFun f) : fun(f) {}
+ SetRange(int min, int max) : fun(nullptr), range(min, max) {}
+ Range operator()(int v) const { return fun ? fun(v) : range; }
+
+ RangeFun* fun;
+ Range range;
+};
+
+#define SetDefaultRange SetRange(default_range)
+
+
+/// BoolConditions struct is used to tune boolean conditions in the
+/// code by toggling them on/off according to a probability that
+/// depends on the value of a tuned integer parameter: for high
+/// values of the parameter condition is always disabled, for low
+/// values is always enabled, otherwise it is enabled with a given
+/// probability that depnends on the parameter under tuning.
+
+struct BoolConditions {
+ void init(size_t size) { values.resize(size, defaultValue), binary.resize(size, 0); }
+ void set();
+
+ std::vector<int> binary, values;
+ int defaultValue = 465, variance = 40, threshold = 500;
+ SetRange range = SetRange(0, 1000);
+};
+
+extern BoolConditions Conditions;
+
+inline void set_conditions() { Conditions.set(); }
+
+
+/// Tune class implements the 'magic' code that makes the setup of a fishtest
+/// tuning session as easy as it can be. Mainly you have just to remove const
+/// qualifiers from the variables you want to tune and flag them for tuning, so
+/// if you have:
+///
+/// const Score myScore = S(10, 15);
+/// const Value myValue[][2] = { { V(100), V(20) }, { V(7), V(78) } };
+///
+/// If you have a my_post_update() function to run after values have been updated,
+/// and a my_range() function to set custom Option's min-max values, then you just
+/// remove the 'const' qualifiers and write somewhere below in the file:
+///
+/// TUNE(SetRange(my_range), myScore, myValue, my_post_update);
+///
+/// You can also set the range directly, and restore the default at the end
+///
+/// TUNE(SetRange(-100, 100), myScore, SetDefaultRange);
+///
+/// In case update function is slow and you have many parameters, you can add:
+///
+/// UPDATE_ON_LAST();
+///
+/// And the values update, including post update function call, will be done only
+/// once, after the engine receives the last UCI option, that is the one defined
+/// and created as the last one, so the GUI should send the options in the same
+/// order in which have been defined.
+
+class Tune {
+
+ typedef void (PostUpdate) (); // Post-update function
+
+ Tune() { read_results(); }
+ Tune(const Tune&) = delete;
+ void operator=(const Tune&) = delete;
+ void read_results();
+
+ static Tune& instance() { static Tune t; return t; } // Singleton
+
+ // Use polymorphism to accomodate Entry of different types in the same vector
+ struct EntryBase {
+ virtual ~EntryBase() = default;
+ virtual void init_option() = 0;
+ virtual void read_option() = 0;
+ };
+
+ template<typename T>
+ struct Entry : public EntryBase {
+
+ static_assert(!std::is_const<T>::value, "Parameter cannot be const!");
+
+ static_assert( std::is_same<T, int>::value
+ || std::is_same<T, Value>::value
+ || std::is_same<T, Score>::value
+ || std::is_same<T, PostUpdate>::value, "Parameter type not supported!");
+
+ Entry(const std::string& n, T& v, const SetRange& r) : name(n), value(v), range(r) {}
+ void operator=(const Entry&) = delete; // Because 'value' is a reference
+ void init_option() override;
+ void read_option() override;
+
+ std::string name;
+ T& value;
+ SetRange range;
+ };
+
+ // Our facilty to fill the container, each Entry corresponds to a parameter to tune.
+ // We use variadic templates to deal with an unspecified number of entries, each one
+ // of a possible different type.
+ static std::string next(std::string& names, bool pop = true);
+
+ int add(const SetRange&, std::string&&) { return 0; }
+
+ template<typename T, typename... Args>
+ int add(const SetRange& range, std::string&& names, T& value, Args&&... args) {
+ list.push_back(std::unique_ptr<EntryBase>(new Entry<T>(next(names), value, range)));
+ return add(range, std::move(names), args...);
+ }
+
+ // Template specialization for arrays: recursively handle multi-dimensional arrays
+ template<typename T, size_t N, typename... Args>
+ int add(const SetRange& range, std::string&& names, T (&value)[N], Args&&... args) {
+ for (size_t i = 0; i < N; i++)
+ add(range, next(names, i == N - 1) + "[" + std::to_string(i) + "]", value[i]);
+ return add(range, std::move(names), args...);
+ }
+
+ // Template specialization for SetRange
+ template<typename... Args>
+ int add(const SetRange&, std::string&& names, SetRange& value, Args&&... args) {
+ return add(value, (next(names), std::move(names)), args...);
+ }
+
+ // Template specialization for BoolConditions
+ template<typename... Args>
+ int add(const SetRange& range, std::string&& names, BoolConditions& cond, Args&&... args) {
+ for (size_t size = cond.values.size(), i = 0; i < size; i++)
+ add(cond.range, next(names, i == size - 1) + "_" + std::to_string(i), cond.values[i]);
+ return add(range, std::move(names), args...);
+ }
+
+ std::vector<std::unique_ptr<EntryBase>> list;
+
+public:
+ template<typename... Args>
+ static int add(const std::string& names, Args&&... args) {
+ return instance().add(SetDefaultRange, names.substr(1, names.size() - 2), args...); // Remove trailing parenthesis
+ }
+ static void init() { for (auto& e : instance().list) e->init_option(); read_options(); } // Deferred, due to UCI::Options access
+ static void read_options() { for (auto& e : instance().list) e->read_option(); }
+ static bool update_on_last;
+};
+
+// Some macro magic :-) we define a dummy int variable that compiler initializes calling Tune::add()
+#define STRINGIFY(x) #x
+#define UNIQUE2(x, y) x ## y
+#define UNIQUE(x, y) UNIQUE2(x, y) // Two indirection levels to expand __LINE__
+#define TUNE(...) int UNIQUE(p, __LINE__) = Tune::add(STRINGIFY((__VA_ARGS__)), __VA_ARGS__)
+
+#define UPDATE_ON_LAST() bool UNIQUE(p, __LINE__) = Tune::update_on_last = true
+
+// Some macro to tune toggling of boolean conditions
+#define CONDITION(x) (Conditions.binary[__COUNTER__] || (x))
+#define TUNE_CONDITIONS() int UNIQUE(c, __LINE__) = (Conditions.init(__COUNTER__), 0); \
+ TUNE(Conditions, set_conditions)
+
+#endif // #ifndef TUNE_H_INCLUDED
projects / stockfish / blobdiff