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// CXSparse/MATLAB/CSparse/cs_amd_mex: approximate minimum degree ordering
// CXSparse, Copyright (c) 2006-2022, Timothy A. Davis. All Rights Reserved.
// SPDX-License-Identifier: LGPL-2.1+
#include "cs_mex.h"
/* cs_amd: approximate minimum degree ordering */
void mexFunction
(
int nargout,
mxArray *pargout [ ],
int nargin,
const mxArray *pargin [ ]
)
{
cs_dl Amatrix, *A ;
int64_t *P, order ;
if (nargout > 1 || nargin < 1 || nargin > 2)
{
mexErrMsgTxt ("Usage: p = cs_amd(A,order)") ;
}
A = cs_dl_mex_get_sparse (&Amatrix, 0, 0, pargin [0]) ; /* get A */
order = (nargin > 1) ? mxGetScalar (pargin [1]) : 1 ; /* get ordering */
order = CS_MAX (order, 1) ;
order = CS_MIN (order, 3) ;
P = cs_dl_amd (order, A) ; /* min. degree ordering */
pargout [0] = cs_dl_mex_put_int (P, A->n, 1, 1) ; /* return P */
}
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