/usr/include/ug/block.h is in libug-dev 3.12.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// vi: set et ts=4 sw=2 sts=2:
/****************************************************************************/
/* */
/* File: block.h */
/* */
/* Purpose: block solver (header file) */
/* */
/* Author: Christian Wieners */
/* Institut fuer Computeranwendungen III */
/* Universitaet Stuttgart */
/* Pfaffenwaldring 27 */
/* 70569 Stuttgart */
/* email: ug@ica3.uni-stuttgart.de */
/* */
/* History: Nov 27 95 */
/* */
/* Remarks: */
/* */
/****************************************************************************/
/* RCS_ID
$Header$
*/
/****************************************************************************/
/* */
/* auto include mechanism and other include files */
/* */
/****************************************************************************/
#ifndef __BLOCK__
#define __BLOCK__
#include "np.h"
#include "disctools.h"
#include "namespace.h"
START_UGDIM_NAMESPACE
/****************************************************************************/
/* */
/* defines in the following order */
/* */
/* compile time constants defining static data size (i.e. arrays) */
/* other constants */
/* macros */
/* */
/****************************************************************************/
#define LOCAL_DIM MAX_NODAL_VALUES
/****************************************************************************/
/* */
/* data structures exported by the corresponding source file */
/* */
/****************************************************************************/
/****************************************************************************/
/* */
/* definition of exported global variables */
/* */
/****************************************************************************/
/****************************************************************************/
/* */
/* function declarations */
/* */
/****************************************************************************/
/****************************************************************************/
/** \brief Perform a matrix multiplication on the small blocks
*
* \param nr Number of rows
* \param nc Number of columns
* \param mcomp1 Components of matrix1
* \param mat1 Array of matrix1
* \param mat2 Array of matrix2
* \param resmat Store mat1*mat2 here
*
* \return 0: ok 1: error
*/
/****************************************************************************/
INT MatMulSmallBlock (SHORT nr, SHORT nc, SHORT n,
const SHORT *mcomp1, const DOUBLE *mat1,
const DOUBLE *mat2, DOUBLE *resmat);
/****************************************************************************/
/** \brief Invert a small system of equations
*
* \param n Size of the small system (n*n)
* \param mcomp Components of matrix to invert
* \param mat Array of this matrix
* \param invmat Store inverse matrix here
*
* \return 0: ok 1: error
*/
/****************************************************************************/
INT InvertSmallBlock (SHORT n, const SHORT *mcomp,
const DOUBLE *mat, DOUBLE *invmat);
/****************************************************************************/
/** \brief ???
*
* \param n Size of the small system (n*n)
* \param scomp Components of the solution
* \param sol Array of the solution
* \param invcomp Components of inverse matrix
* \param inv Array of this matrix
* \param rhs Find right hand side here
*
* \return 0: ok 1: error
*/
/****************************************************************************/
INT SolveInverseSmallBlock (SHORT n, const SHORT *scomp, DOUBLE *sol,
const SHORT *invcomp, const DOUBLE *inv,
const DOUBLE *rhs);
/****************************************************************************/
/** \brief Solve a small system of equations
*
* \param n Size of the small system (n*n)
* \param scomp Components of the solution
* \param sol Array of the solution
* \param mcomp Components of matrix to invert
* \param mat Array of this matrix
* \param rhs Find right hand side here
*
* \return 0: ok 1: error
*/
/****************************************************************************/
INT SolveSmallBlock (SHORT n, const SHORT *scomp, DOUBLE *sol,
const SHORT *mcomp, const DOUBLE *mat, DOUBLE *rhs);
INT InvertFullMatrix (INT n, DOUBLE mat[LOCAL_DIM][LOCAL_DIM],
DOUBLE invmat[LOCAL_DIM][LOCAL_DIM]);
INT InvertSpdMatrix (INT n, DOUBLE mat[LOCAL_DIM][LOCAL_DIM],
DOUBLE invmat[LOCAL_DIM][LOCAL_DIM]);
INT Choleskydecomposition (INT n, DOUBLE *mat, DOUBLE *chol);
INT SolveFullMatrix (INT n, DOUBLE *sol, DOUBLE *mat, DOUBLE *rhs);
INT InvertFullMatrix_piv (INT n, DOUBLE *mat, DOUBLE *inv);
INT SolveFullMatrix2 (INT n, DOUBLE *sol, DOUBLE *mat, DOUBLE *rhs);
INT InvertFullMatrix_gen (INT n, DOUBLE *mat, DOUBLE *inv, DOUBLE *rhs,
INT *ipv);
END_UGDIM_NAMESPACE
#endif
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