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//------------------------------------------------------------------------------
// GB_mex_subassign_alias: C<C>(:,:) = accum(C(:,:),C)
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2020, All Rights Reserved.
// http://suitesparse.com See GraphBLAS/Doc/License.txt for license.
//------------------------------------------------------------------------------
#include "GB_mex.h"
#define USAGE "C = GB_mex_subassign_alias (C, accum, desc)"
#define FREE_ALL \
{ \
GB_MATRIX_FREE (&C) ; \
GrB_Descriptor_free_(&desc) ; \
GB_mx_put_global (true, 0) ; \
}
void mexFunction
(
int nargout,
mxArray *pargout [ ],
int nargin,
const mxArray *pargin [ ]
)
{
bool malloc_debug = GB_mx_get_global (true) ;
GrB_Matrix C = NULL ;
GrB_Descriptor desc = NULL ;
// check inputs
GB_WHERE (USAGE) ;
if (nargout > 1 || nargin < 2 || nargin > 3)
{
mexErrMsgTxt ("Usage: " USAGE) ;
}
// get C (make a deep copy)
#define GET_DEEP_COPY \
C = GB_mx_mxArray_to_Matrix (pargin [0], "C input", true, true) ;
#define FREE_DEEP_COPY GB_MATRIX_FREE (&C) ;
GET_DEEP_COPY ;
if (C == NULL)
{
FREE_ALL ;
mexErrMsgTxt ("C failed") ;
}
// get accum, if present
bool user_complex = (Complex != GxB_FC64) && (C->type == Complex) ;
GrB_BinaryOp accum ;
if (!GB_mx_mxArray_to_BinaryOp (&accum, pargin [1], "accum",
C->type, user_complex))
{
FREE_ALL ;
mexErrMsgTxt ("accum failed") ;
}
// get desc
if (!GB_mx_mxArray_to_Descriptor (&desc, PARGIN (2), "desc"))
{
FREE_ALL ;
mexErrMsgTxt ("desc failed") ;
}
GrB_Index nrows, ncols ;
GrB_Matrix_nvals (&nrows, C) ;
GrB_Matrix_nvals (&ncols, C) ;
// C<C>(:,:) = accum (C(:,:),C)
METHOD (GxB_Matrix_subassign_(C, C, accum, C,
GrB_ALL, nrows, GrB_ALL, ncols, desc)) ;
// return C to MATLAB 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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