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/*
* Copyright (c) 2013-2023, Arm Limited and Contributors. All rights reserved.
* Copyright (c) 2023, Intel Corporation. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <errno.h>
#include <stddef.h>
#include <string.h>
int memcpy_s(void *dst, size_t dsize, void *src, size_t ssize)
{
unsigned int *s = (unsigned int *)src;
unsigned int *d = (unsigned int *)dst;
/*
* Check source and destination size is NULL
*/
if ((dst == NULL) || (src == NULL)) {
return -ENOMEM;
}
/*
* Check source and destination size validity
*/
if ((dsize == 0) || (ssize == 0)) {
return -ERANGE;
}
/*
* Check both source and destination size range
*/
if ((ssize > dsize) || (dsize > ssize)) {
return -EINVAL;
}
/*
* Check both source and destination address overlapping
* When (s > d < s + ssize)
* Or (d > s < d + dsize)
*/
if (d > s) {
if ((d) < (s + ssize)) {
return -EOPNOTSUPP;
}
}
if (s > d) {
if ((s) < (d + dsize)) {
return -EOPNOTSUPP;
}
}
/*
* Start copy process when there is no error
*/
while (ssize--) {
d[ssize] = s[ssize];
}
return 0;
}
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