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//------------------------------------------------------------------------------
// GB_mex_mxm: C<Mask> = accum(C,A*B)
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
// c = prod (A) with terminal times monoid (terminal value is 0)
#include "GB_mex.h"
#define USAGE "c = GB_mex_reduce_complex (A, hack)"
#define FREE_ALL \
{ \
GrB_Matrix_free_(&A) ; \
GrB_Monoid_free_(&Times_terminal) ; \
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_Info info ;
GrB_Matrix A = NULL ;
GrB_Monoid Times_terminal = NULL ;
// check inputs
if (nargout > 1 || nargin < 1 || nargin > 2)
{
mexErrMsgTxt ("Usage: " USAGE) ;
}
// get A (shallow copy; must be complex)
A = GB_mx_mxArray_to_Matrix (pargin [0], "A input", false, true) ;
if (A == NULL)
{
FREE_ALL ;
mexErrMsgTxt ("A failed") ;
}
if (A->type != Complex)
{
FREE_ALL ;
mexErrMsgTxt ("A must be complex") ;
}
if (A->iso)
{
FREE_ALL ;
mexErrMsgTxt ("A must not be iso") ;
}
GxB_FC64_t one = GxB_CMPLX (1,0) ;
GxB_FC64_t zero = GxB_CMPLX (0,0) ;
// create the monoid
if (Complex == GxB_FC64)
{
Times_terminal = GxB_TIMES_FC64_MONOID ;
}
else
{
info = GxB_Monoid_terminal_new_UDT (&Times_terminal,
Complex_times, &one, &zero) ;
if (info != GrB_SUCCESS)
{
FREE_ALL ;
mexErrMsgTxt ("Times_terminal failed") ;
}
}
int64_t GET_SCALAR (1, int64_t, hack, -1) ;
if (hack >= 0)
{
GxB_FC64_t *Ax = A->x ; // OK: A is non iso
Ax [hack] = GxB_CMPLX (0,0) ;
}
// allocate the output scalar
pargout [0] = GB_mx_create_full (1, 1, GxB_FC64) ;
GxB_FC64_t *c = (GxB_FC64_t *) mxGetComplexDoubles (pargout [0]) ;
// reduce to a scalar
if (Complex == GxB_FC64)
{
info = GxB_Matrix_reduce_FC64_(c, NULL, Times_terminal, A, NULL) ;
}
else
{
info = GrB_Matrix_reduce_UDT (c, NULL, Times_terminal, A, NULL) ;
}
if (info != GrB_SUCCESS)
{
FREE_ALL ;
mexErrMsgTxt ("reduce failed") ;
}
FREE_ALL ;
}
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