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//------------------------------------------------------------------------------
// GrB_Matrix_assign: C<M>(I,J) = accum (C(I,J),A) or A'
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
#include "assign/GB_assign.h"
#include "mask/GB_get_mask.h"
GrB_Info GrB_Matrix_assign // C<M>(I,J) += A or A'
(
GrB_Matrix C, // input/output matrix for results
const GrB_Matrix Mask, // mask for C, unused if NULL
const GrB_BinaryOp accum, // accum for Z=accum(C(I,J),T)
const GrB_Matrix A, // first input: matrix A
const uint64_t *I, // row indices
uint64_t ni, // number of row indices
const uint64_t *J, // column indices
uint64_t nj, // number of column indices
const GrB_Descriptor desc // descriptor for C, M, and A
)
{
//--------------------------------------------------------------------------
// check inputs
//--------------------------------------------------------------------------
GB_WHERE3 (C, Mask, A,
"GrB_Matrix_assign (C, M, accum, A, I, ni, J, nj, desc)") ;
GB_RETURN_IF_NULL (C) ;
GB_RETURN_IF_NULL (A) ;
GB_RETURN_IF_OUTPUT_IS_READONLY (C) ;
GB_BURBLE_START ("GrB_assign") ;
// get the descriptor
GB_GET_DESCRIPTOR (info, desc, C_replace, Mask_comp, Mask_struct,
A_transpose, xx1, xx2, xx7) ;
// get the mask
GrB_Matrix M = GB_get_mask (Mask, &Mask_comp, &Mask_struct) ;
//--------------------------------------------------------------------------
// C<M>(I,J) = accum (C(I,J), A)
//--------------------------------------------------------------------------
info = GB_assign (
C, C_replace, // C matrix and its descriptor
M, Mask_comp, Mask_struct, // mask matrix and its descriptor
false, // do not transpose the mask
accum, // for accum (C(I,J),A)
A, A_transpose, // A and its descriptor (T=A or A')
I, false, ni, // row indices
J, false, nj, // column indices
false, NULL, GB_ignore_code, // no scalar expansion
GB_ASSIGN,
Werk) ;
GB_BURBLE_END ;
return (info) ;
}
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