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//------------------------------------------------------------------------------
// GB_mex_assign_alias_mask: C<A> = A
//------------------------------------------------------------------------------
// 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_assign_alias_mask (C, A, desc)"
#define FREE_ALL \
{ \
GrB_Matrix_free_(&C) ; \
GrB_Matrix_free_(&A) ; \
GrB_Descriptor_free_(&desc) ; \
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, A = NULL ;
GrB_Descriptor desc = NULL ;
// check inputs
if (nargout > 1 || nargin < 2 || nargin > 3)
{
mexErrMsgTxt ("Usage: " USAGE) ;
}
// get A C (make a deep copy)
#define GET_DEEP_COPY \
C = GB_mx_mxArray_to_Matrix (pargin [0], "C input", true, true) ; \
GxB_Matrix_Option_set (C, GxB_SPARSITY_CONTROL, C->sparsity_control) ; \
A = GB_mx_mxArray_to_Matrix (pargin [1], "A input", true, true) ; \
GxB_Matrix_Option_set (A, GxB_SPARSITY_CONTROL, A->sparsity_control) ;
#define FREE_DEEP_COPY \
GrB_Matrix_free_(&C) ; \
GrB_Matrix_free_(&A) ;
GET_DEEP_COPY ;
if (C == NULL || A == NULL)
{
FREE_ALL ;
mexErrMsgTxt ("C or A failed") ;
}
// get desc
if (!GB_mx_mxArray_to_Descriptor (&desc, PARGIN (2), "desc"))
{
FREE_ALL ;
mexErrMsgTxt ("desc failed") ;
}
GrB_Index nrows, ncols ;
GrB_Matrix_nrows (&nrows, C) ;
GrB_Matrix_ncols (&ncols, C) ;
// C<A> = A
METHOD (GxB_Matrix_subassign_(C, A, NULL, A,
GrB_ALL, nrows, GrB_ALL, ncols, desc)) ;
// 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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