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//------------------------------------------------------------------------------
// GxB_Vector_select: select entries from a vector
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
#include "GB_select.h"
#include "GB_get_mask.h"
GrB_Info GxB_Vector_select // w<M> = accum (w, select(u,k))
(
GrB_Vector w, // input/output vector for results
const GrB_Vector M_in, // optional mask for w, unused if NULL
const GrB_BinaryOp accum, // optional accum for z=accum(w,t)
const GxB_SelectOp op, // operator to apply to the entries
const GrB_Vector u, // first input: vector u
const GrB_Scalar Thunk, // optional input for select operator
const GrB_Descriptor desc // descriptor for w and mask
)
{
//--------------------------------------------------------------------------
// check inputs
//--------------------------------------------------------------------------
GB_WHERE (w, "GxB_Vector_select (w, M, accum, op, u, Thunk, desc)") ;
GB_BURBLE_START ("GxB_select") ;
GB_RETURN_IF_NULL_OR_FAULTY (w) ;
GB_RETURN_IF_FAULTY (M_in) ;
GB_RETURN_IF_NULL_OR_FAULTY (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) M_in, &Mask_comp, &Mask_struct) ;
//--------------------------------------------------------------------------
// select the entries; do not transpose; assemble pending entries
//--------------------------------------------------------------------------
info = GB_select (
(GrB_Matrix) w, C_replace, // w and its descriptor
M, Mask_comp, Mask_struct, // mask and its descriptor
accum, // optional accum for Z=accum(C,T)
(GB_Operator) op, // operator to select the entries
(GrB_Matrix) u, // first input: u
Thunk, // optional input for select op
false, // u, not transposed
Context) ;
GB_BURBLE_END ;
return (info) ;
}
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