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specmicp/src/dfpmsolver/parabolic_structs.hpp
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parabolic_structs.hpp
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#ifndef SPECMICP_DFPMSOLVER_PARABOLICSTRUCTS_HPP
#define SPECMICP_DFPMSOLVER_PARABOLICSTRUCTS_HPP
#include "driver_structs.hpp"
namespace specmicp {
namespace dfpmsolver {
enum class ParabolicLinesearch
{
Bactracking, // Bactracking linesearch
Strang // Strang Linesearch
};
enum class ParabolicLinesearchReturnCode
{
NotSupposedToHappen,
MaximumIterations,
LambdaTooSmall,
Divergence,
Success
};
//! \brief Options of a parabolic driver
//!
struct ParabolicDriverOptions: public DriverOptions
{
scalar_t alpha; //!< Implicit/Cranck-Nicholson parameter
ParabolicLinesearch linesearch; //!< The linesearch to use
int quasi_newton; //!< Number of iterations without reforming the jacobian
ParabolicDriverOptions():
DriverOptions(),
alpha(1.0),
linesearch(ParabolicLinesearch::Bactracking),
quasi_newton(1)
{}
};
//! \brief Return codes
enum class ParabolicDriverReturnCode
{
LinesearchFailed = -5, //!< Linesearch has failed (usually indicates a bad system)
MaxIterations = -4, //!< Maximum number of iterations reached
MaxStepTakenTooManyTimes = -3, //!< Maximum step taken too many times (divergence)
ErrorLinearSystem = -2, //!< Error when solving the linear system
StationaryPoint = -1, //!< Stationnary points are detected
NotConvergedYet = 0, //!< Problem is not converged
ResidualMinimized = 1, //!< The residual is minimized (Success)
ErrorMinimized = 2 //!< Error is minimized (may be good)
};
//! \brief Performance of the parabolic driver
struct ParabolicDriverPerformance: public DriverPerformance
{
ParabolicDriverReturnCode return_code;
ParabolicDriverPerformance():
DriverPerformance(),
return_code(ParabolicDriverReturnCode::NotConvergedYet)
{}
};
} // end namespace dfpmsolver
} // end namespace specmicp
#endif // SPECMICP_DFPMSOLVER_PARABOLICSTRUCTS_HPP
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