Tsqr_ApplyType.hpp

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//
//                 Anasazi: Block Eigensolvers Package
//                 Copyright (2010) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
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#ifndef __TSQR_TsqrApplyType_hpp
#define __TSQR_TsqrApplyType_hpp

#include <string>


namespace TSQR {

  class ApplyType {
  public:
    ApplyType (const std::string& op);

    bool transposed () const { return type_ != NoTranspose_; }

    ApplyType (const ApplyType& rhs);

    ApplyType& operator= (const ApplyType& rhs);

    bool operator== (const ApplyType& rhs) const {
      return type_ == rhs.type_;
    }

    bool operator!= (const ApplyType& rhs) const {
      return !(type_ == rhs.type_);
    }

    static const ApplyType NoTranspose;

    static const ApplyType Transpose;

    static const ApplyType ConjugateTranspose;

    const std::string& toString () const { return lapackString_; }

  private:
    enum ApplyType_ { NoTranspose_, Transpose_, ConjugateTranspose_ };
    ApplyType_ type_;

    static std::string 
    enumToLapackString (const ApplyType::ApplyType_ theType);

    bool 
    decide_transposed (const std::string& op) const;

    ApplyType_
    decide_apply_type (const std::string& op) const;

    std::string lapackString_;
  };

} // namespace TSQR

#endif // __TSQR_TsqrApplyType_hpp