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rockOS/libc/string/memmove.c

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2022-07-21 21:59:23 +03:00
/**
* memmove implementation of rockOS
* Copyright (C) 2022 Furkan Mudanyali
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, _either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
2022-07-18 09:59:04 +03:00
#include <string.h>
void* memmove (void* dstptr, const void* srcptr, size_t size) {
unsigned char* dst = (unsigned char*) dstptr;
const unsigned char* src = (const unsigned char*) srcptr;
if (dst < src) {
for (size_t i = 0; i < size; i++) {
dst[i] = src[i];
}
} else {
for (size_t i = size; i != 0; i--) {
dst[i-1] = src[i-1];
}
}
return dstptr;
}