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//------------------------------------------------------------------------------
// GxB_Vector_subassign_Scalar_Vector: assign scalar to vector
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
// Assigns a single scalar to a vector, w(I)<M> = accum(w(I),x)
// The scalar x is implicitly expanded into a vector u of size ni-by-1,
// with each entry in u equal to x.
#include "assign/GB_subassign.h"
#include "ij/GB_ij.h"
#define GB_FREE_ALL \
if (I_size > 0) GB_FREE_MEMORY (&I, I_size) ;
GrB_Info GxB_Vector_subassign_Scalar_Vector // w(I)<mask> = accum (w(I),x)
(
GrB_Vector w, // input/output vector for results
const GrB_Vector mask, // optional mask for w, unused if NULL
const GrB_BinaryOp accum, // optional accum for Z=accum(w(I),x)
const GrB_Scalar scalar, // scalar to assign to w(I)
const GrB_Vector I_vector, // row indices
const GrB_Descriptor desc // descriptor for w and mask
)
{
//--------------------------------------------------------------------------
// check inputs
//--------------------------------------------------------------------------
GB_WHERE4 (w, mask, scalar, I_vector,
"GxB_Vector_subassign_Scalar_Vector (w, M, accum, s, I, desc)") ;
GB_BURBLE_START ("GxB_Vector_subassign_Scalar_Vector") ;
//--------------------------------------------------------------------------
// get the index vectors
//--------------------------------------------------------------------------
void *I = NULL ;
size_t I_size = 0 ;
int64_t ni = 0 ;
GrB_Type I_type = NULL ;
GB_OK (GB_ijxvector (I_vector, (w == I_vector), 0, desc, false,
&I, &ni, &I_size, &I_type, Werk)) ;
bool I_is_32 = (I_type == GrB_UINT32) ;
//--------------------------------------------------------------------------
// w<M>(I) = accum (w(I), scalar)
//--------------------------------------------------------------------------
GB_OK (GB_Vector_subassign_scalar (w, mask, accum, scalar,
I, I_is_32, ni, desc, Werk)) ;
//--------------------------------------------------------------------------
// free workspace and return result
//--------------------------------------------------------------------------
GB_FREE_ALL ;
GB_BURBLE_END ;
return (GrB_SUCCESS) ;
}
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