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//------------------------------------------------------------------------------
// GB_mex_assign_scalar: C<Mask>(I,J) = accum (C (I,J), Scalar)
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
#include "GB_mex.h"
#define USAGE "C = GB_mex_assign_scalar(C,Mask,acc,S,I,J,desc,kind)"
#define FREE_ALL \
{ \
GrB_Matrix_free_(&A) ; \
GrB_Matrix_free_(&Mask) ; \
GrB_Matrix_free_(&C) ; \
GrB_Vector_free_(&I_vector) ; \
GrB_Vector_free_(&J_vector) ; \
GrB_Descriptor_free_(&desc) ; \
GB_mx_put_global (true) ; \
}
#define GET_DEEP_COPY \
C = GB_mx_mxArray_to_Matrix (pargin [0], "C input", true, true) ;
#define FREE_DEEP_COPY GrB_Matrix_free_(&C) ;
GrB_Matrix C = NULL ;
GrB_Matrix Mask = NULL ;
GrB_Matrix A = NULL ;
GrB_Descriptor desc = NULL ;
GrB_BinaryOp accum = NULL ;
uint64_t *I = NULL, ni = 0, I_range [3] ; GrB_Vector I_vector = NULL ;
uint64_t *J = NULL, nj = 0, J_range [3] ; GrB_Vector J_vector = NULL ;
bool ignore ;
bool malloc_debug = false ;
GrB_Info info = GrB_SUCCESS ;
int C_sparsity_control ;
//------------------------------------------------------------------------------
// assign: perform a single assignment
//------------------------------------------------------------------------------
#define OK(method) \
{ \
info = method ; \
if (info != GrB_SUCCESS) \
{ \
return (info) ; \
} \
}
//------------------------------------------------------------------------------
// GB_mex_assign_scalar mexFunction
//------------------------------------------------------------------------------
void mexFunction
(
int nargout,
mxArray *pargout [ ],
int nargin,
const mxArray *pargin [ ]
)
{
C = NULL ;
Mask = NULL ;
A = NULL ;
desc = NULL ;
accum = NULL ;
I = NULL ; ni = 0 ;
J = NULL ; nj = 0 ;
info = GrB_SUCCESS ;
//--------------------------------------------------------------------------
// check inputs
//--------------------------------------------------------------------------
malloc_debug = GB_mx_get_global (true) ;
A = NULL ;
C = NULL ;
Mask = NULL ;
desc = NULL ;
// check inputs
if (nargout > 1 || !(nargin == 7 || nargin == 8))
{
mexErrMsgTxt ("Usage: " USAGE) ;
}
// get C (make a deep copy)
GET_DEEP_COPY ;
if (C == NULL)
{
FREE_ALL ;
mexErrMsgTxt ("C failed") ;
}
// get Mask (deep copy)
Mask = GB_mx_mxArray_to_Matrix (pargin [1], "Mask", true, false) ;
if (Mask == NULL && !mxIsEmpty (pargin [1]))
{
FREE_ALL ;
mexErrMsgTxt ("Mask failed") ;
}
// get A (deep copy)
A = GB_mx_mxArray_to_Matrix (pargin [3], "S", true, true) ;
if (A == NULL)
{
FREE_ALL ;
mexErrMsgTxt ("S failed") ;
}
if (GB_NROWS (A) != 1 || GB_NCOLS (A) != 1)
{
mexErrMsgTxt ("S must be a scalar") ;
}
// get accum, if present
bool user_complex = (Complex != GxB_FC64)
&& (C->type == Complex || A->type == Complex) ;
accum = NULL ;
if (!GB_mx_mxArray_to_BinaryOp (&accum, pargin [2], "accum",
C->type, user_complex))
{
FREE_ALL ;
mexErrMsgTxt ("accum failed") ;
}
// get kind:
// 0: use uint64_t * arrays for I and J
// else: use GrB_Vector variants
int GET_SCALAR (7, int, kind, 0) ;
// get I
if (!GB_mx_mxArray_to_indices (pargin [4], &I, &ni, I_range, &ignore,
(kind == 0) ? NULL: (&I_vector)))
{
FREE_ALL ;
mexErrMsgTxt ("I failed") ;
}
// get J
if (!GB_mx_mxArray_to_indices (pargin [5], &J, &nj, J_range, &ignore,
(kind == 0) ? NULL: (&J_vector)))
{
FREE_ALL ;
mexErrMsgTxt ("J failed") ;
}
// get desc
if (!GB_mx_mxArray_to_Descriptor (&desc, PARGIN (6), "desc"))
{
FREE_ALL ;
mexErrMsgTxt ("desc failed") ;
}
// use GrB_Matrix_assign_Scalar or GrB_Vector_assign_Scalar
GrB_Scalar S = (GrB_Scalar) A ;
if (GB_VECTOR_OK (C) && (Mask == NULL || GB_VECTOR_OK (Mask)))
{
if (kind == 0)
{
METHOD (GrB_Vector_assign_Scalar_((GrB_Vector) C, (GrB_Vector) Mask,
accum, S, I, ni, desc)) ;
}
else
{
METHOD (GxB_Vector_assign_Scalar_Vector_((GrB_Vector) C,
(GrB_Vector) Mask, accum, S, I_vector, desc)) ;
}
}
else
{
if (kind == 0)
{
METHOD (GrB_Matrix_assign_Scalar_((GrB_Matrix) C, (GrB_Matrix) Mask,
accum, S, I, ni, J, nj, desc)) ;
}
else
{
METHOD (GxB_Matrix_assign_Scalar_Vector_((GrB_Matrix) C,
(GrB_Matrix) Mask,
accum, S, I_vector, J_vector, desc)) ;
}
}
//--------------------------------------------------------------------------
// return C as a struct
//--------------------------------------------------------------------------
pargout [0] = GB_mx_Matrix_to_mxArray (&C, "C assign result", true) ;
FREE_ALL ;
}
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