1/* Copyright (C) 1992-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <unistd.h>
19
20void
21swab (const void *bfrom, void *bto, ssize_t n)
22{
23 const char *from = (const char *) bfrom;
24 char *to = (char *) bto;
25
26 n &= ~((ssize_t) 1);
27 while (n > 1)
28 {
29 const char b0 = from[--n], b1 = from[--n];
30 to[n] = b0;
31 to[n + 1] = b1;
32 }
33}
34