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ifp_biluk.h
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00001 /*@HEADER
00002 // ***********************************************************************
00003 // 
00004 //       Ifpack: Object-Oriented Algebraic Preconditioner Package
00005 //                 Copyright (2002) Sandia Corporation
00006 // 
00007 // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
00008 // license for use of this work by or on behalf of the U.S. Government.
00009 // 
00010 // This library is free software; you can redistribute it and/or modify
00011 // it under the terms of the GNU Lesser General Public License as
00012 // published by the Free Software Foundation; either version 2.1 of the
00013 // License, or (at your option) any later version.
00014 //  
00015 // This library is distributed in the hope that it will be useful, but
00016 // WITHOUT ANY WARRANTY; without even the implied warranty of
00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00018 // Lesser General Public License for more details.
00019 //  
00020 // You should have received a copy of the GNU Lesser General Public
00021 // License along with this library; if not, write to the Free Software
00022 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
00023 // USA
00024 // Questions? Contact Michael A. Heroux (maherou@sandia.gov) 
00025 // 
00026 // ***********************************************************************
00027 //@HEADER
00028 */
00029 
00030 #ifndef _IFP_BILUK_H_
00031 #define _IFP_BILUK_H_
00032 
00033 #include "Ifpack_config.h"
00034 
00035 #include "ifp_GlobalPrecon.h"
00036 
00037 class ifp_LocalMat;
00038 class ifp_BlockMat;
00039 
00040 class IFPACK_DEPRECATED ifp_biluk : public ifp_GlobalPrecon
00041 {
00042 private:
00043     const ifp_BlockMat *Ap;
00044 
00045     ifp_LocalMat **diag;  // inverse or factors of diagonal blocks
00046 
00047     ifp_LocalMat **al;    // lower triangular factor (strict lower part stored)
00048     int      *jal;
00049     int      *ial;
00050     ifp_LocalMat **au;    // upper triangular factor
00051     int      *jau;
00052     int      *iau;
00053 
00054     int NumEntries_;
00055     int NumNonzeros_;
00056 
00057 public:
00058     ifp_biluk();
00059    ~ifp_biluk();
00060 
00061    int NumEntries() {return(NumEntries_);};
00062    int NumNonzeros() {return(NumNonzeros_);};
00063 
00064    ifp_BlockMat * A() {return((ifp_BlockMat *)Ap);};
00065  
00066     void setup(const ifp_BlockMat& A, int levfill);
00067     void apply (int, int, const double *, int, double *, int);
00068     void applyr(int, int, const double *, int, double *, int);
00069     void applyl(int, int, const double *, int, double *, int);
00070 
00071     void multiply(int, int, const double *, int, double *, int);
00072     double condest();
00073 
00074     static int growth;
00075 };
00076 
00077 #endif // _IFP_BILUK_H_
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