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//------------------------------------------------------------------------------
// GB_convert_any_to_non_iso: convert a matrix from iso to non-iso
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
#include "GB.h"
GrB_Info GB_convert_any_to_non_iso // convert iso matrix to non-iso
(
GrB_Matrix A, // input/output matrix
bool initialize, // if true, copy the iso value to all of A->x
GB_Context Context
)
{
//--------------------------------------------------------------------------
// check inputs
//--------------------------------------------------------------------------
ASSERT_MATRIX_OK (A, "A to convert to non-iso", GB0) ;
if (!A->iso)
{
// nothing to do
return (GrB_SUCCESS) ;
}
//--------------------------------------------------------------------------
// get the iso entry of A
//--------------------------------------------------------------------------
size_t asize = A->type->size ;
GB_void scalar [GB_VLA(asize)] ;
if (initialize)
{
memcpy (scalar, A->x, asize) ;
}
//--------------------------------------------------------------------------
// ensure A->x is large enough, and not shallow
//--------------------------------------------------------------------------
int64_t anz = GB_nnz_held (A) ;
anz = GB_IMAX (anz, 1) ;
int64_t Ax_size_required = anz * asize ;
if (A->x_size < Ax_size_required || A->x_shallow)
{
if (!A->x_shallow)
{
// free the old space
GB_FREE (&(A->x), A->x_size) ;
}
// allocate the new space
A->x = GB_MALLOC (Ax_size_required, GB_void, &(A->x_size)) ; // x:OK
A->x_shallow = false ;
if (A->x == NULL)
{
// out of memory
GB_phybix_free (A) ;
return (GrB_OUT_OF_MEMORY) ;
}
}
//--------------------------------------------------------------------------
// copy the first entry into all of A->x
//--------------------------------------------------------------------------
if (initialize)
{
GB_iso_expand (A->x, anz, scalar, asize, Context) ;
}
//--------------------------------------------------------------------------
// finalize the matrix and return result
//--------------------------------------------------------------------------
A->iso = false ; // OK: convert_any_to_non_iso
ASSERT_MATRIX_OK (A, "A converted to non-iso", GB0) ;
return (GrB_SUCCESS) ;
}
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