/* $Header: /var/lib/cvs/dynare_cpp/sylv/cc/SchurDecomp.h,v 1.1.1.1 2004/06/04 13:00:44 kamenik Exp $ */

/* Tag $Name:  $ */

#ifndef SCHUR_DECOMP_H
#define SCHUR_DECOMP_H

#include "SylvMatrix.h"
#include "QuasiTriangular.h"

class QuasiTriangular;
class SchurDecomp {
	bool q_destroy;
	SqSylvMatrix* q;
	bool t_destroy;
	QuasiTriangular* t;
public:
	SchurDecomp(const SqSylvMatrix& m);
	SchurDecomp(const QuasiTriangular& tr);
	SchurDecomp(QuasiTriangular& tr);
	const SqSylvMatrix& getQ() const {return *q;}
	const QuasiTriangular& getT() const {return *t;}
	SqSylvMatrix& getQ() {return *q;}
	QuasiTriangular& getT() {return *t;}
	virtual int getDim() const;
	virtual ~SchurDecomp();
};

class SchurDecompZero : public SchurDecomp {
	GeneralMatrix ru; /* right upper matrix */
public:
	SchurDecompZero(const GeneralMatrix& m);
	const GeneralMatrix& getRU() const {return ru;}
	int getDim() const;
	int getZeroCols() const {return ru.numRows();}
};

#endif /* SCHUR_DECOMP_H */


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