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//------------------------------------------------------------------------------
// GxB_Matrix_subassign_Scalar_Vector: assign a scalar to matrix
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
#include "assign/GB_subassign.h"
#include "ij/GB_ij.h"
#define GB_FREE_ALL \
if (I_size > 0) GB_FREE_MEMORY (&I, I_size) ; \
if (J_size > 0) GB_FREE_MEMORY (&J, J_size) ;
GrB_Info GxB_Matrix_subassign_Scalar_Vector // C(I,J)<Mask> = accum (C(I,J),x)
(
GrB_Matrix C, // input/output matrix for results
const GrB_Matrix Mask, // optional mask for C, unused if NULL
const GrB_BinaryOp accum, // optional accum for Z=accum(C(I,J),x)
const GrB_Scalar scalar, // scalar to assign to C(I,J)
const GrB_Vector I_vector, // row indices
const GrB_Vector J_vector, // column indices
const GrB_Descriptor desc // descriptor for C(I,J) and Mask
)
{
//--------------------------------------------------------------------------
// check inputs
//--------------------------------------------------------------------------
GB_WHERE5 (C, Mask, scalar, I_vector, J_vector,
"GxB_Matrix_subassign_Scalar_Vector (C, M, accum, s, I, J, desc)") ;
GB_BURBLE_START ("GxB_Matrix_subassign_Scalar_Vector") ;
//--------------------------------------------------------------------------
// get the index vectors
//--------------------------------------------------------------------------
void *I = NULL, *J = NULL ;
size_t I_size = 0, J_size = 0 ;
int64_t ni = 0, nj = 0 ;
GrB_Type I_type = NULL, J_type = NULL ;
GB_OK (GB_ijxvector (I_vector, false, 0, desc, false,
&I, &ni, &I_size, &I_type, Werk)) ;
GB_OK (GB_ijxvector (J_vector, false, 1, desc, false,
&J, &nj, &J_size, &J_type, Werk)) ;
bool I_is_32 = (I_type == GrB_UINT32) ;
bool J_is_32 = (J_type == GrB_UINT32) ;
//--------------------------------------------------------------------------
// C<M>(I,J) = accum (C(I,J), scalar)
//--------------------------------------------------------------------------
GB_OK (GB_Matrix_subassign_scalar (C, Mask, accum, scalar,
I, I_is_32, ni, J, J_is_32, nj, desc, Werk)) ;
//--------------------------------------------------------------------------
// free workspace and return result
//--------------------------------------------------------------------------
GB_FREE_ALL ;
GB_BURBLE_END ;
return (GrB_SUCCESS) ;
}
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