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//------------------------------------------------------------------------------
// GB_dup: make a deep copy of a sparse matrix
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
// C = A, making a deep copy. Not user-callable; this function does the work
// for user-callable functions GrB_*_dup.
// if numeric is false, C->x is allocated but not initialized.
// There is little use for the following feature, but (*Chandle) and A might be
// identical, with GrB_dup (&A, A). The input matrix A will be lost, and will
// result in a memory leak, unless the user application does the following
// (which is valid and memory-leak free):
// B = A ;
// GrB_dup (&A, A) ;
// GrB_free (&A) ;
// GrB_free (&B) ;
// A is the new copy and B is the old copy. Each should be freed when done.
#include "GB.h"
#define GB_FREE_ALL ;
GrB_Info GB_dup // make an exact copy of a matrix
(
GrB_Matrix *Chandle, // handle of output matrix to create
const GrB_Matrix A, // input matrix to copy
GB_Werk Werk
)
{
//--------------------------------------------------------------------------
// check inputs
//--------------------------------------------------------------------------
ASSERT (Chandle != NULL) ;
ASSERT_MATRIX_OK (A, "A to duplicate", GB0) ;
(*Chandle) = NULL ;
//--------------------------------------------------------------------------
// delete any lingering zombies and assemble any pending tuples
//--------------------------------------------------------------------------
GB_MATRIX_WAIT (A) ;
//--------------------------------------------------------------------------
// C = A
//--------------------------------------------------------------------------
GB_BURBLE_MATRIX (A, "(%sdup) ", A->iso ? "iso " : "") ;
return (GB_dup_worker (Chandle, A->iso, A, true, NULL)) ;
}
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