Ifpack_IC_Utils.h

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 IFPACK_IC_UTILS_H
00031 #define IFPACK_IC_UTILS_H
00032 
00033 typedef struct {
00034     double *val;  /* also known as A  */
00035     int    *col;  /* also known as JA; first column is column 0 */
00036     int    *ptr;  /* also known as IA; with ptr[0] = 0 */
00037 } Ifpack_AIJMatrix;
00038 
00039 extern "C" {
00040 void ifpack_quicksort (int *const pbase, double *const daux, int total_elems);
00041 }
00042 
00043 void Ifpack_AIJMatrix_dealloc(Ifpack_AIJMatrix *a);
00044 
00045 void crout_ict(
00046     int n,
00047 #ifdef IFPACK
00048     void * A,
00049     int maxentries,
00050     int (*getcol)( void * A, int col, int ** nentries, double * val, int * ind),
00051     int (*getdiag)( void *A, double * diag),
00052 #else
00053     const Ifpack_AIJMatrix *AL,
00054     const double *Adiag,
00055 #endif
00056     double droptol,
00057     int lfil,
00058     Ifpack_AIJMatrix *L,
00059     double **pdiag);
00060 
00061 
00062 #endif

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