67 lines
2.0 KiB
C
67 lines
2.0 KiB
C
/****************************************************************************
|
|
* libs/libc/string/lib_memmove.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
#include <sys/types.h>
|
|
#include <string.h>
|
|
|
|
#include "libc.h"
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
#if !defined(CONFIG_LIBC_ARCH_MEMMOVE) && defined(LIBC_BUILD_STRING)
|
|
#undef memmove /* See mm/README.txt */
|
|
no_builtin("memmove")
|
|
FAR void *memmove(FAR void *dest, FAR const void *src, size_t count)
|
|
{
|
|
FAR char *tmp;
|
|
FAR char *s;
|
|
|
|
if (dest <= src)
|
|
{
|
|
tmp = (FAR char *) dest;
|
|
s = (FAR char *) src;
|
|
|
|
while (count--)
|
|
{
|
|
*tmp++ = *s++;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
tmp = (FAR char *) dest + count;
|
|
s = (FAR char *) src + count;
|
|
|
|
while (count--)
|
|
{
|
|
*--tmp = *--s;
|
|
}
|
|
}
|
|
|
|
return dest;
|
|
}
|
|
#endif
|