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//------------------------------------------------------------------------------
// GxB_Vector_subassign: w(Rows)<M> = accum (w(Rows),u)
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
// Compare with GrB_Vector_assign, which uses M and C_replace differently
#include "assign/GB_subassign.h"
#include "mask/GB_get_mask.h"
GrB_Info GxB_Vector_subassign // w(Rows)<M> = accum (w(Rows),u)
(
GrB_Vector w, // input/output matrix for results
const GrB_Vector mask, // optional mask for w(Rows), unused if NULL
const GrB_BinaryOp accum, // optional accum for z=accum(w(Rows),t)
const GrB_Vector u, // first input: vector u
const uint64_t *Rows, // row indices
uint64_t nRows, // number of row indices
const GrB_Descriptor desc // descriptor for w(Rows) and M
)
{
//--------------------------------------------------------------------------
// check inputs
//--------------------------------------------------------------------------
GB_RETURN_IF_NULL (w) ;
GB_RETURN_IF_NULL (u) ;
GB_RETURN_IF_OUTPUT_IS_READONLY (w) ;
GB_WHERE3 (w, mask, u,
"GxB_Vector_subassign (w, M, accum, u, Rows, nRows, desc)") ;
GB_BURBLE_START ("GxB_subassign") ;
ASSERT (GB_VECTOR_OK (w)) ;
ASSERT (mask == NULL || GB_VECTOR_OK (mask)) ;
ASSERT (GB_VECTOR_OK (u)) ;
// get the descriptor
GB_GET_DESCRIPTOR (info, desc, C_replace, Mask_comp, Mask_struct,
xx1, xx2, xx3, xx7) ;
// get the mask
GrB_Matrix M = GB_get_mask ((GrB_Matrix) mask, &Mask_comp, &Mask_struct) ;
//--------------------------------------------------------------------------
// w(Rows)<M> = accum (w(Rows), u)
//--------------------------------------------------------------------------
info = GB_subassign (
(GrB_Matrix) w, C_replace, // w vector and its descriptor
M, Mask_comp, Mask_struct, // mask and its descriptor
false, // do not transpose the mask
accum, // for accum (C(Rows,:),A)
(GrB_Matrix) u, false, // u as a matrix; never transposed
Rows, false, nRows, // row indices
GrB_ALL, false, 1, // all column indices
false, NULL, GB_ignore_code, // no scalar expansion
Werk) ;
GB_BURBLE_END ;
return (info) ;
}
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