nuttx/libs/libc/string/lib_mempcpy.c
crafcat7 33b22f51da libc/lib_memcpy.c: Add mempcpy method.
Signed-off-by: crafcat7 <chenrun1@xiaomi.com>
2023-02-17 15:15:19 +08:00

62 lines
2.4 KiB
C

/****************************************************************************
* libs/libc/string/lib_mempcpy.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>
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: mempcpy
****************************************************************************/
/****************************************************************************
* Name: mempcpy
*
* Description:
* Like memcpy(), but returns address of byte after the last copied byte
* in dest. This allows constructing data piecewise by copying its parts
* into consecutive memory locations.
*
* This function is not in POSIX.
*
* Input Parameters:
* src - Source location from which to copy.
* dest - Destination location into which to copy.
* n - Size of data to be copied, in bytes.
*
* Returned Value:
* A pointer to the byte in dest which immediately follows the last copied
* byte.
*
****************************************************************************/
FAR void *mempcpy(FAR void *dest, FAR const void *src, size_t n)
{
return (FAR char *)memcpy(dest, src, n) + n;
}