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#include "mex.h"
#include "../spok.h"
/* spok_invalid: returns an invalid sparse matrix to test SPOK. */
/* Copyright 2008-2011, Timothy A. Davis, http://suitesparse.com */
/* SPDX-License-Identifier: Apache-2.0 */
void mexFunction
(
int nargout,
mxArray *pargout [ ],
int nargin,
const mxArray *pargin [ ]
)
{
SPOK_INT *Ap, *Ai ;
double *Ax ;
int kind ;
if (nargin == 0)
{
kind = 0 ;
}
else
{
kind = (int) mxGetScalar (pargin [0]) ;
}
if (kind < 0)
{
/* a sparse 2-by-2 matrix with invalid column pointers*/
pargout [0] = mxCreateSparse (2, 2, 4, mxREAL) ;
Ap = (mwSignedIndex *) mxGetJc (pargout [0]) ;
Ai = (mwSignedIndex *) mxGetIr (pargout [0]) ;
Ax = mxGetPr (pargout [0]) ;
Ap [0] = 2 ;
Ap [1] = 2 ;
Ap [2] = 2 ;
}
else if (kind == 0)
{
/* a sparse 1-by-1 matrix with one explicit zero */
pargout [0] = mxCreateSparse (1, 1, 1, mxREAL) ;
Ap = (mwSignedIndex *) mxGetJc (pargout [0]) ;
Ai = (mwSignedIndex *) mxGetIr (pargout [0]) ;
Ax = mxGetPr (pargout [0]) ;
Ap [0] = 0 ;
Ap [1] = 1 ;
Ai [0] = 0 ;
Ax [0] = 0 ;
}
else
{
/* a sparse 2-by-2 matrix with jumbled row indices */
pargout [0] = mxCreateSparse (2, 2, 4, mxREAL) ;
Ap = (mwSignedIndex *) mxGetJc (pargout [0]) ;
Ai = (mwSignedIndex *) mxGetIr (pargout [0]) ;
Ax = mxGetPr (pargout [0]) ;
Ap [0] = 0 ;
Ap [1] = 2 ;
Ap [2] = 2 ;
Ai [0] = 1 ;
Ai [1] = 0 ;
Ax [0] = 1 ;
Ax [1] = 2 ;
}
}
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