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//------------------------------------------------------------------------------
// GB_mex_apply_maskalias: C<C> = accum(C,op(A)) or op(A')
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
// Apply a unary operator to a matrix, with C aliased to the Mask
#include "GB_mex.h"
#define USAGE "C = GB_mex_apply_maskalias (C, accum, op, 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 ;
GrB_Matrix A = NULL ;
GrB_Descriptor desc = NULL ;
// check inputs
if (nargout > 1 || nargin < 4 || nargin > 5)
{
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 GrB_Matrix_free_(&C) ;
GET_DEEP_COPY ;
if (C == NULL)
{
FREE_ALL ;
mexErrMsgTxt ("C failed") ;
}
// get A (shallow copy)
A = GB_mx_mxArray_to_Matrix (pargin [3], "A input", false, true) ;
if (A == NULL)
{
FREE_ALL ;
mexErrMsgTxt ("A failed") ;
}
// get accum, if present
bool user_complex = (Complex != GxB_FC64)
&& (C->type == Complex || A->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 op
GrB_UnaryOp op ;
if (!GB_mx_mxArray_to_UnaryOp (&op, pargin [2], "op",
A->type, user_complex) || op == NULL)
{
FREE_ALL ;
mexErrMsgTxt ("UnaryOp failed") ;
}
// get desc
if (!GB_mx_mxArray_to_Descriptor (&desc, PARGIN (4), "desc"))
{
FREE_ALL ;
mexErrMsgTxt ("desc failed") ;
}
// C<C> = accum(C,op(A))
if (GB_NCOLS (C) == 1 && (desc == NULL || desc->in0 == GxB_DEFAULT))
{
// this is just to test the Vector version
METHOD (GrB_Vector_apply_((GrB_Vector) C, (GrB_Vector) C, accum, op,
(GrB_Vector) A, desc)) ;
}
else
{
METHOD (GrB_Matrix_apply_(C, C, accum, op, A, 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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