| 1 | /* Copyright (C) 1992, 1996, 1997 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, write to the Free |
| 16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 17 | 02111-1307 USA. */ |
| 18 | |
| 19 | #include <unistd.h> |
| 20 | |
| 21 | void |
| 22 | swab (const void *bfrom, void *bto, ssize_t n) |
| 23 | { |
| 24 | const char *from = (const char *) bfrom; |
| 25 | char *to = (char *) bto; |
| 26 | |
| 27 | n &= ~((ssize_t) 1); |
| 28 | while (n > 1) |
| 29 | { |
| 30 | const char b0 = from[--n], b1 = from[--n]; |
| 31 | to[n] = b0; |
| 32 | to[n + 1] = b1; |
| 33 | } |
| 34 | } |