function.h

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#ifndef FASTCAT_FUNCTION_H_
#define FASTCAT_FUNCTION_H_
 
// Include related header (for cc files)
 
// Include c then c++ libraries
 
// Include external then project includes
#include "fastcat/device_base.h"
 
namespace fastcat
{
enum FunctionType {
  POLYNOMIAL,
  SUMMATION,
  MULTIPLICATION,
  POWER,
  EXPONENTIAL,
  SIGMOID,
  BAD_FUNCTION_TYPE
};
FunctionType FunctionTypeFromString(const std::string&);
 
typedef struct {
  int order = 0;
} PolynomialParams;
 
typedef struct {
  double exponent;
} PowerParams;
 
typedef struct {
  double base;
} ExponentialParams;
 
class Function : public DeviceBase
{
 public:
  Function();
  bool ConfigFromYaml(const YAML::Node& node) override;
  bool Read() override;
 
 protected:
  std::string       function_type_string_;
  enum FunctionType function_type_;
 
  std::vector<double> polynomial_coefficients_;
  union {
    PolynomialParams  polynomial_params_;
    PowerParams       power_params_;
    ExponentialParams exponential_params_;
  };
};
 
}  // namespace fastcat
 
#endif