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//------------------------------------------------------------------------------
// gbreshape: reshape a GraphBLAS matrix
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
// usage:
// C = gbreshape (A, nrows_new, ncols_new, by_col)
#include "gb_interface.h"
#define USAGE "usage: C = gbreshape (A, nrows_new, ncols_new, by_col)"
void mexFunction
(
int nargout,
mxArray *pargout [ ],
int nargin,
const mxArray *pargin [ ]
)
{
//--------------------------------------------------------------------------
// check inputs
//--------------------------------------------------------------------------
gb_usage ((nargin == 3 || nargin == 4) && nargout == 1, USAGE) ;
GrB_Matrix A = gb_get_shallow (pargin [0]) ;
GrB_Index nrows_new = gb_mxget_uint64_scalar (pargin [1], "nrows_new") ;
GrB_Index ncols_new = gb_mxget_uint64_scalar (pargin [2], "ncols_new") ;
bool by_col = (nargin == 3) ? true : ((bool) mxGetScalar (pargin [3])) ;
//--------------------------------------------------------------------------
// reshape the matrix
//--------------------------------------------------------------------------
GrB_Matrix C = NULL ;
OK (GxB_Matrix_reshapeDup (&C, A, by_col, nrows_new, ncols_new, NULL)) ;
//--------------------------------------------------------------------------
// return result
//--------------------------------------------------------------------------
GrB_Matrix_free (&A) ;
pargout [0] = gb_export (&C, KIND_GRB) ;
GB_WRAPUP ;
}
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