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//------------------------------------------------------------------------------
// LAGraph_Calloc: wrapper for calloc
//------------------------------------------------------------------------------
// LAGraph, (c) 2019-2022 by The LAGraph Contributors, All Rights Reserved.
// SPDX-License-Identifier: BSD-2-Clause
//
// For additional details (including references to third party source code and
// other files) see the LICENSE file or contact permission@sei.cmu.edu. See
// Contributors.txt for a full list of contributors. Created, in part, with
// funding and support from the U.S. Government (see Acknowledgments.txt file).
// DM22-0790
// Contributed by Timothy A. Davis, Texas A&M University
//------------------------------------------------------------------------------
#include "LG_internal.h"
int LAGraph_Calloc
(
// output:
void **p, // pointer to allocated block of memory
// input:
size_t nitems, // number of items
size_t size_of_item, // size of each item
char *msg
)
{
// check inputs
LG_CLEAR_MSG ;
LG_ASSERT (p != NULL, GrB_NULL_POINTER) ;
(*p) = NULL ;
// make sure at least one item is allocated
nitems = LAGRAPH_MAX (1, nitems) ;
// make sure at least one byte is allocated
size_of_item = LAGRAPH_MAX (1, size_of_item) ;
// compute the size and check for integer overflow
size_t size ;
if (!LG_Multiply_size_t (&size, nitems, size_of_item))
{
// overflow
return (GrB_OUT_OF_MEMORY) ;
}
if (LAGraph_Calloc_function == NULL)
{
// calloc function not available; use malloc and memset
LG_TRY (LAGraph_Malloc (p, nitems, size_of_item, msg)) ;
memset (*p, 0, size) ;
return (GrB_SUCCESS) ;
}
// use the calloc function
(*p) = LAGraph_Calloc_function (nitems, size_of_item) ;
return (((*p) == NULL) ? GrB_OUT_OF_MEMORY : GrB_SUCCESS) ;
}