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//------------------------------------------------------------------------------
// CHOLMOD/MATLAB/sdmult: sparse-times-full using CHOLMOD
//------------------------------------------------------------------------------
// CHOLMOD/MATLAB Module. Copyright (C) 2005-2023, Timothy A. Davis.
// All Rights Reserved.
// SPDX-License-Identifier: GPL-2.0+
//------------------------------------------------------------------------------
// Compute C = S*F or S'*F where S is sparse and F is full (C is also sparse).
// S and F must both be real or both be complex.
//
// Usage:
//
// C = sdmult (S,F) ; C = S*F
// C = sdmult (S,F,0) ; C = S*F
// C = sdmult (S,F,1) ; C = S'*F
#include "sputil2.h"
void mexFunction
(
int nargout,
mxArray *pargout [ ],
int nargin,
const mxArray *pargin [ ]
)
{
double dummy = 0, one [2] = {1,0}, zero [2] = {0,0} ;
cholmod_sparse *S, Smatrix ;
cholmod_dense *F, Fmatrix, *C ;
cholmod_common Common, *cm ;
int64_t srow, scol, frow, fcol, crow, transpose ;
//--------------------------------------------------------------------------
// start CHOLMOD and set parameters
//--------------------------------------------------------------------------
cm = &Common ;
cholmod_l_start (cm) ;
sputil2_config (SPUMONI, cm) ;
//--------------------------------------------------------------------------
// check inputs
//--------------------------------------------------------------------------
if (nargout > 1 || nargin < 2 || nargin > 3)
{
mexErrMsgTxt ("Usage: C = sdmult (S,F,transpose)") ;
}
srow = mxGetM (pargin [0]) ;
scol = mxGetN (pargin [0]) ;
frow = mxGetM (pargin [1]) ;
fcol = mxGetN (pargin [1]) ;
transpose = !((nargin == 2) || (mxGetScalar (pargin [2]) == 0)) ;
if (frow != (transpose ? srow : scol))
{
mexErrMsgTxt ("invalid inner dimensions") ;
}
if (!mxIsSparse (pargin [0]) || mxIsSparse (pargin [1]))
{
mexErrMsgTxt ("sdmult (S,F): S must be sparse, F must be full") ;
}
//--------------------------------------------------------------------------
// get S and F
//--------------------------------------------------------------------------
size_t S_xsize = 0 ;
S = sputil2_get_sparse (pargin [0], 0, CHOLMOD_DOUBLE, &Smatrix,
&S_xsize, cm) ;
size_t F_xsize = 0 ;
F = sputil2_get_dense (pargin [1], CHOLMOD_DOUBLE, &Fmatrix, &F_xsize, cm) ;
//--------------------------------------------------------------------------
// C = S*F or S'*F
//--------------------------------------------------------------------------
crow = transpose ? scol : srow ;
C = cholmod_l_allocate_dense (crow, fcol, crow, F->xtype, cm) ;
cholmod_l_sdmult (S, transpose, one, zero, F, C, cm) ;
pargout [0] = sputil2_put_dense (&C, mxDOUBLE_CLASS, cm) ;
//--------------------------------------------------------------------------
// free workspace and the CHOLMOD L, except for what is copied to MATLAB
//--------------------------------------------------------------------------
sputil2_free_sparse (&S, &Smatrix, S_xsize, cm) ;
sputil2_free_dense (&F, &Fmatrix, F_xsize, cm) ;
cholmod_l_finish (cm) ;
if (SPUMONI > 0) cholmod_l_print_common (" ", cm) ;
}
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