/**************************************************************************** * 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 #include #include /**************************************************************************** * Public Functions ****************************************************************************/ #ifndef CONFIG_LIBC_ARCH_MEMMOVE #undef memmove /* See mm/README.txt */ 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