102 lines
2.7 KiB
C++
102 lines
2.7 KiB
C++
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#ifndef STAR_STORED_FUNCTIONS_HPP
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#define STAR_STORED_FUNCTIONS_HPP
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#include "StarParametricFunction.hpp"
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#include "StarJson.hpp"
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#include "StarMultiTable.hpp"
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#include "StarThread.hpp"
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namespace Star {
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STAR_CLASS(StoredFunction);
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STAR_CLASS(StoredFunction2);
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STAR_CLASS(StoredConfigFunction);
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STAR_CLASS(FunctionDatabase);
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STAR_EXCEPTION(StoredFunctionException, StarException);
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enum class Monotonicity { Flat, Increasing, Decreasing, None };
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// Interpolated function from single input to single output read from
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// configuration.
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class StoredFunction {
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public:
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struct SearchResult {
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double targetValue;
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double searchTolerance;
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// Whether or not a solution was found within the given tolerance.
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bool found;
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// The resulting input that was found.
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double solution;
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// The value that is gotten from evaluating the function at the solution.
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double value;
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};
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static double const DefaultSearchTolerance;
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StoredFunction(ParametricFunction<double, double> data);
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Monotonicity monotonicity() const;
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double evaluate(double input) const;
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// Search for the input which would give the target value. Will only work if
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// the function Monotonicity is Increasing or Decreasing.
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SearchResult search(double targetValue, double valueTolerance = DefaultSearchTolerance) const;
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private:
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Monotonicity m_monotonicity;
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ParametricFunction<double, double> m_function;
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};
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// Interpolated function from two inputs to an output read from configuration.
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class StoredFunction2 {
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public:
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StoredFunction2(MultiTable2D table);
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double evaluate(double x, double y) const;
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private:
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MultiTable2D table;
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};
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// Function from a single input to some generic configuration.
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class StoredConfigFunction {
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public:
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StoredConfigFunction(ParametricTable<int, Json> data);
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Json get(double input) const;
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private:
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ParametricTable<int, Json> m_data;
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};
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class FunctionDatabase {
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public:
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FunctionDatabase();
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StringList namedFunctions() const;
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StringList namedFunctions2() const;
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StringList namedConfigFunctions() const;
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// If configOrName is a string, loads the named function. If it is an inline
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// config, reads the inline config.
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StoredFunctionPtr function(Json const& configOrName) const;
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StoredFunction2Ptr function2(Json const& configOrName) const;
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StoredConfigFunctionPtr configFunction(Json const& configOrName) const;
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private:
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static ParametricFunction<double, double> parametricFunctionFromConfig(Json descriptor);
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static ParametricTable<int, Json> parametricTableFromConfig(Json descriptor);
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static MultiTable2D multiTable2DFromConfig(Json descriptor);
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StringMap<StoredFunctionPtr> m_functions;
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StringMap<StoredFunction2Ptr> m_functions2;
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StringMap<StoredConfigFunctionPtr> m_configFunctions;
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};
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}
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#endif
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