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//------------------------------------------------------------------------------
// GxB_Matrix_unpack_BitmapR: unpack a bitmap matrix, held by row
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
#include "GB_export.h"
#define GB_FREE_ALL ;
GrB_Info GxB_Matrix_unpack_BitmapR // unpack a bitmap matrix, by row
(
GrB_Matrix A, // matrix to unpack (type, nrows, ncols unchanged)
int8_t **Ab, // bitmap
void **Ax, // values
GrB_Index *Ab_size, // size of Ab in bytes
GrB_Index *Ax_size, // size of Ax in bytes
bool *iso, // if true, A is iso
GrB_Index *nvals, // # of entries in bitmap
const GrB_Descriptor desc
)
{
//--------------------------------------------------------------------------
// check inputs and get the descriptor
//--------------------------------------------------------------------------
GB_WHERE1 ("GxB_Matrix_unpack_BitmapR (A, "
"&Ab, &Ax, &Ab_size, &Ax_size, &iso, &nvals, desc)") ;
GB_BURBLE_START ("GxB_Matrix_unpack_BitmapR") ;
GB_RETURN_IF_NULL_OR_FAULTY (A) ;
GB_GET_DESCRIPTOR (info, desc, xx1, xx2, xx3, xx4, xx5, xx6, xx7) ;
//--------------------------------------------------------------------------
// ensure the matrix is bitmap by-row
//--------------------------------------------------------------------------
// ensure the matrix is in by-row format
if (A->is_csc)
{
// A = A', done in-place, to put A in by-row format
GBURBLE ("(transpose) ") ;
GB_OK (GB_transpose_in_place (A, false, Context)) ;
}
GB_OK (GB_convert_any_to_bitmap (A, Context)) ;
//--------------------------------------------------------------------------
// unpack the matrix
//--------------------------------------------------------------------------
ASSERT (GB_IS_BITMAP (A)) ;
ASSERT (!(A->is_csc)) ;
ASSERT (!GB_ZOMBIES (A)) ;
ASSERT (!GB_JUMBLED (A)) ;
ASSERT (!GB_PENDING (A)) ;
int sparsity ;
bool is_csc ;
GrB_Type type ;
GrB_Index vlen, vdim ;
info = GB_export (true, &A, &type, &vlen, &vdim, false,
NULL, NULL, // Ap
NULL, NULL, // Ah
Ab, Ab_size, // Ab
NULL, NULL, // Ai
Ax, Ax_size, // Ax
nvals, NULL, NULL, // nvals for bitmap
&sparsity, &is_csc, // bitmap by col
iso, Context) ;
if (info == GrB_SUCCESS)
{
ASSERT (sparsity == GxB_BITMAP) ;
ASSERT (!is_csc) ;
}
GB_BURBLE_END ;
return (info) ;
}
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