81 lines
3.8 KiB
C
81 lines
3.8 KiB
C
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/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
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/* ******** *** SparseLib++ */
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/* ******* ** *** *** *** v. 1.5c */
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/* ***** *** ******** ******** */
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/* ***** *** ******** ******** R. Pozo */
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/* ** ******* *** ** *** *** K. Remington */
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/* ******** ******** A. Lumsdaine */
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/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
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/* */
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/* */
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/* SparseLib++ : Sparse Matrix Library */
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/* */
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/* National Institute of Standards and Technology */
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/* University of Notre Dame */
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/* Authors: R. Pozo, K. Remington, A. Lumsdaine */
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/* */
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/* NOTICE */
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/* */
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/* Permission to use, copy, modify, and distribute this software and */
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/* its documentation for any purpose and without fee is hereby granted */
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/* provided that the above notice appear in all copies and supporting */
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/* documentation. */
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/* */
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/* Neither the Institutions (National Institute of Standards and Technology, */
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/* University of Notre Dame) nor the Authors make any representations about */
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/* the suitability of this software for any purpose. This software is */
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/* provided ``as is'' without expressed or implied warranty. */
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/* */
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/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
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// modification GR
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// 1) on utilise une interface unique pour tous les préconditionneurs
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// d'où l'héritage d'une classe virtuelle
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// 2) on utilise sytématiquement les classes templates MV++
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// 3) introduction des matrices carrées et des matrices bandes
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#ifndef DIAGPRE_GR_H
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#define DIAGPRE_GR_H
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//#include "vecdefs.h"
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#include "vecdefs_GR.h" // modif GR
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//#include VECTOR_H
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#include "comprow_double.h"
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#include "compcol_double.h"
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#include "pre_cond_double.h"
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#include "Mat_abstraite.h"
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class DiagPreconditioner_double : public Pre_cond_double
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{
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private:
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VECTOR_double diag_;
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public:
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DiagPreconditioner_double (const CompCol_Mat_double &);
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DiagPreconditioner_double (const CompRow_Mat_double &);
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// cas d'une matrice abstraite
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DiagPreconditioner_double(const Mat_abstraite &A);
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~DiagPreconditioner_double (void) { };
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// méthodes-------
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VECTOR_double solve (const VECTOR_double &x) const;
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VECTOR_double trans_solve (const VECTOR_double &x) const;
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protected : // modif GR : les deux fonctions suivantes ne sont pas génériques
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// d'où le status protected
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const double& diag(int i) const { return diag_(i); }
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double& diag(int i) { return diag_(i); }
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// modif GR : cette fonction est interne, elle n'avait pas de prototype !!
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int CopyInvDiagonals(int n, const int *pntr, const int *indx,
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const double *sa, double *diag);
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// surcharge de la fonction pour les matrices autres que celle sparse
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int CopyInvDiagonals(const Mat_abstraite& A);
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};
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#endif
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