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//------------------------------------------------------------------------------
// GxB_Vector_extract_Vector: w<M> = accum (w, u(I))
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
#include "extract/GB_extract.h"
#include "mask/GB_get_mask.h"
#include "ij/GB_ij.h"
#define GB_FREE_ALL \
if (I_size > 0) GB_FREE_MEMORY (&I, I_size) ;
GrB_Info GxB_Vector_extract_Vector // w<mask> = accum (w, u(I))
(
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,t)
const GrB_Vector u, // first input: vector u
const GrB_Vector I_vector, // row indices
const GrB_Descriptor desc // descriptor for w and mask
)
{
//--------------------------------------------------------------------------
// check inputs
//--------------------------------------------------------------------------
GB_RETURN_IF_NULL (w) ;
GB_RETURN_IF_NULL (u) ;
GB_RETURN_IF_OUTPUT_IS_READONLY (w) ;
GB_WHERE4 (w, mask, u, I_vector,
"GxB_Vector_extract_Vector (w, M, accum, u, I, desc)") ;
GB_BURBLE_START ("GrB_extract") ;
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) ;
//--------------------------------------------------------------------------
// get the index vector
//--------------------------------------------------------------------------
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) ;
//--------------------------------------------------------------------------
// do the work in GB_extract
//--------------------------------------------------------------------------
GB_OK (GB_extract (
(GrB_Matrix) w, C_replace, // w as a matrix, and its descriptor
M, Mask_comp, Mask_struct, // mask and its descriptor
accum, // optional accum for z=accum(w,t)
(GrB_Matrix) u, false, // u as matrix; never transposed
I, I_is_32, ni, // row indices
GrB_ALL, false, 1, // all columns (64-bit)
Werk)) ;
//--------------------------------------------------------------------------
// free workspace and return result
//--------------------------------------------------------------------------
GB_FREE_ALL ;
GB_BURBLE_END ;
return (GrB_SUCCESS) ;
}
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