G4INCLRootFinder.hh

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//
// INCL++ intra-nuclear cascade model
// Pekka Kaitaniemi, CEA and Helsinki Institute of Physics
// Davide Mancusi, CEA
// Alain Boudard, CEA
// Sylvie Leray, CEA
// Joseph Cugnon, University of Liege
//
#define INCLXX_IN_GEANT4_MODE 1

#include "globals.hh"

#ifndef G4INCLROOTFINDER_HH_
#define G4INCLROOTFINDER_HH_

#include <utility>
#include "G4INCLIFunction1D.hh"

namespace G4INCL {

  class RootFunctor : public IFunction1D {
  public:
    virtual void cleanUp(const G4bool success) const = 0;
    virtual ~RootFunctor() {};
  protected:
    RootFunctor(const G4double x0, const G4double x1) :
      IFunction1D(x0, x1)
    {};
  };

  class RootFinder {
  public:
    static G4bool solve(RootFunctor const * const f, const G4double x0);

    static std::pair<G4double,G4double> const &getSolution() { return RootFinder::solution; }

  private:
    static std::pair<G4double,G4double> solution;

    static std::pair<G4double,G4double> bracketRoot(RootFunctor const * const f, const G4double x0);

    static const G4int maxIterations=50;

    static const G4double toleranceY;

  protected:
    RootFinder() {};
    ~RootFinder() {};
    
  };
}
#endif /* G4INCLROOTFINDER_HH_ */