ifp_BlockVec.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.
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00015 // This library is distributed in the hope that it will be useful, but
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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
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00028 */
00029 
00030 #ifndef _IFP_BLOCKVEC_H_
00031 #define _IFP_BLOCKVEC_H_
00032 
00033 #include <stdlib.h>
00034 #ifndef NULL
00035 #define NULL 0
00036 #endif
00037 #ifdef DEBUG
00038 #include <assert.h>
00039 #endif
00040 
00041 class ifp_BlockVec
00042 {
00043 private:
00044     double *base;
00045     const int *partit;
00046     int owndata;
00047 
00048 public:
00049     double *v;
00050     int     dim0;
00051     int     dim1;
00052     int     ld;
00053     int     size0;
00054 
00055     ifp_BlockVec& operator()(int i)
00056     {
00057 #ifdef DEBUG
00058             assert(partit != NULL);
00059             assert(partit[i] < partit[i+1]);
00060             assert(partit[i+1] <= dim0);
00061 #endif
00062       v = base + partit[i];
00063       size0 = partit[i+1] - partit[i];
00064       return *this;
00065     }
00066 
00067     ifp_BlockVec(int nr, int nc, const double *a, int lda, 
00068                  const int *partitioning)
00069     {
00070         dim0 = nr;
00071         dim1 = nc;
00072         ld = lda;
00073   size0 = nr;
00074         base = (double *)a;
00075         v = (double *)a;
00076         partit = partitioning;
00077   owndata = 0;
00078     }
00079 
00080     ifp_BlockVec(const ifp_BlockVec& A);
00081     ifp_BlockVec(const ifp_BlockVec& A, int i);
00082 
00083    ~ifp_BlockVec()
00084     {
00085   if (owndata)
00086       delete [] base;
00087   base = NULL;
00088     }
00089 
00090     void VecCopy(const ifp_BlockVec& A);
00091     void VecSetToZero();
00092 
00093     void BlockCopy(const ifp_BlockVec& A);
00094     void BlockSetToZero();
00095 };
00096 
00097 #endif // _IFP_BLOCKVEC_H_
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