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//------------------------------------------------------------------------------
// GB_mex_Matrix_extract_UDT: interface for C<Mask> = accum (C,A(I,J))
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
#include "GB_mex.h"
#include "GB_mex_errors.h"
#define USAGE "C = GB_mex_Matrix_extract (C, Mask, accum, A, I, J, desc, use_mydouble)"
#define FREE_ALL \
{ \
GrB_Matrix_free_(&C) ; \
GrB_Matrix_free_(&C2) ; \
GrB_Matrix_free_(&Mask) ; \
GrB_Matrix_free_(&A) ; \
GrB_Matrix_free_(&A2) ; \
GrB_free (&mydouble) ; \
GrB_free (&castdouble) ; \
GrB_free (&castback) ; \
GrB_Descriptor_free_(&desc) ; \
GB_mx_put_global (true) ; \
}
typedef double my_double ;
void cast_double (my_double *z, double *x) ;
void cast_double (my_double *z, double *x) { *z = (my_double) *x ; }
void cast_back (double *z, my_double *x) ;
void cast_back (double *z, my_double *x) { *z = (double) *x ; }
void mexFunction
(
int nargout,
mxArray *pargout [ ],
int nargin,
const mxArray *pargin [ ]
)
{
GrB_Info info = GrB_SUCCESS ;
bool malloc_debug = GB_mx_get_global (true) ;
GrB_Matrix C = NULL ;
GrB_Matrix Mask = NULL ;
GrB_Matrix A = NULL ;
GrB_Descriptor desc = NULL ;
uint64_t *I = NULL, ni = 0, I_range [3] ;
uint64_t *J = NULL, nj = 0, J_range [3] ;
bool ignore ;
uint64_t m, n ;
GrB_Type mydouble = NULL ;
GrB_UnaryOp castdouble = NULL, castback = NULL ;
GrB_Matrix A2 = NULL, C2 = NULL ;
// check inputs
if (nargout > 1 || nargin < 6 || nargin > 8)
{
mexErrMsgTxt ("Usage: " USAGE) ;
}
// get C (make a deep copy)
C = GB_mx_mxArray_to_Matrix (pargin [0], "C input", true, true) ;
if (C == NULL)
{
FREE_ALL ;
mexErrMsgTxt ("C failed") ;
}
// get Mask (shallow copy)
Mask = GB_mx_mxArray_to_Matrix (pargin [1], "Mask", false, false) ;
if (Mask == NULL && !mxIsEmpty (pargin [1]))
{
FREE_ALL ;
mexErrMsgTxt ("Mask 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 [2], "accum",
C->type, user_complex))
{
FREE_ALL ;
mexErrMsgTxt ("accum failed") ;
}
// get I
if (!GB_mx_mxArray_to_indices (pargin [4], &I, &ni, I_range, &ignore, NULL))
{
FREE_ALL ;
mexErrMsgTxt ("I failed") ;
}
// get J
if (!GB_mx_mxArray_to_indices (pargin [5], &J, &nj, J_range, &ignore, NULL))
{
FREE_ALL ;
mexErrMsgTxt ("J failed") ;
}
// get desc
if (!GB_mx_mxArray_to_Descriptor (&desc, PARGIN (6), "desc"))
{
FREE_ALL ;
mexErrMsgTxt ("desc failed") ;
}
// get the use_mydouble option
bool GET_SCALAR (7, bool, use_mydouble, false) ;
if (use_mydouble)
{
// A = (mydouble) A, if A is double
if (A->type == GrB_FP64 && C->type == GrB_FP64)
{
// printf ("use_mydouble A\n") ;
OK (GrB_Type_new (&mydouble, sizeof (double))) ;
OK (GrB_UnaryOp_new (&castdouble,
(GxB_unary_function) cast_double, mydouble, GrB_FP64)) ;
OK (GrB_UnaryOp_new (&castback,
(GxB_unary_function) cast_back, GrB_FP64, mydouble)) ;
OK (GrB_Matrix_nrows (&m, A)) ;
OK (GrB_Matrix_ncols (&n, A)) ;
// OK (GxB_print (A, 2)) ;
OK (GrB_Matrix_new (&A2, mydouble, m, n)) ;
OK (GrB_apply (A2, NULL, NULL, castdouble, A, NULL)) ;
OK (GrB_free (&A)) ;
A = A2 ;
A2 = NULL ;
// OK (GxB_print (C, 2)) ;
OK (GrB_Matrix_nrows (&m, C)) ;
OK (GrB_Matrix_ncols (&n, C)) ;
OK (GrB_Matrix_new (&C2, mydouble, m, n)) ;
OK (GrB_apply (C2, NULL, NULL, castdouble, C, NULL)) ;
OK (GrB_free (&C)) ;
C = C2 ;
C2 = NULL ;
}
}
// C<Mask> = accum (C,A(I,J))
// printf ("do exttract:\n") ;
// OK (GxB_print (Mask, 2)) ;
// OK (GxB_print (C, 2)) ;
// OK (GxB_print (A, 2)) ;
OK (GrB_Matrix_extract_(C, Mask, accum, A, I, ni, J, nj, desc)) ;
if (C->type == mydouble)
{
OK (GrB_Matrix_nrows (&m, C)) ;
OK (GrB_Matrix_ncols (&n, C)) ;
OK (GrB_Matrix_new (&C2, GrB_FP64, m, n)) ;
OK (GrB_apply (C2, NULL, NULL, castback, C, NULL)) ;
OK (GrB_free (&C)) ;
C = C2 ;
C2 = NULL ;
}
// 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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