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//------------------------------------------------------------------------------
// GB_mex_resize: resize a matrix
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
#include "GB_mex.h"
#define USAGE "C = GB_mex_resize (A, nrows_new, ncols_new)"
#define FREE_ALL \
{ \
GrB_Matrix_free_(&C) ; \
GB_mx_put_global (true) ; \
}
void mexFunction
(
int nargout,
mxArray *pargout [ ],
int nargin,
const mxArray *pargin [ ]
)
{
bool malloc_debug = GB_mx_get_global (true) ;
GrB_Matrix C = NULL ;
// check inputs
if (nargout > 1 || nargin < 1 || nargin > 3)
{
mexErrMsgTxt ("Usage: " USAGE) ;
}
#define GET_DEEP_COPY \
C = GB_mx_mxArray_to_Matrix (pargin [0], "C input", true, true) ;
#define FREE_DEEP_COPY GrB_Matrix_free_(&C) ;
GET_DEEP_COPY ;
if (C == NULL)
{
FREE_ALL ;
mexErrMsgTxt ("C failed") ;
}
// get vlen_new
int64_t GET_SCALAR (1, int64_t, vlen_new, C->vlen) ;
// get vdim_new
int64_t GET_SCALAR (2, int64_t, vdim_new, C->vdim) ;
// resize the matrix
if (vlen_new % 5 == 0)
{
// test the old GxB functions
if (GB_VECTOR_OK (C) && vdim_new == 1)
{
// resize C as a vector
METHOD (GxB_Vector_resize ((GrB_Vector) C, vlen_new)) ;
}
else
{
// resize C as a matrix
METHOD (GxB_Matrix_resize (C, vlen_new, vdim_new)) ;
}
}
else
{
// test the new GrB functions
if (GB_VECTOR_OK (C) && vdim_new == 1)
{
// resize C as a vector
METHOD (GrB_Vector_resize_((GrB_Vector) C, vlen_new)) ;
}
else
{
// resize C as a matrix
METHOD (GrB_Matrix_resize_(C, vlen_new, vdim_new)) ;
}
}
// return C as a struct and free the GraphBLAS C
pargout [0] = GB_mx_Matrix_to_mxArray (&C, "C output", true) ;
FREE_ALL ;
}
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