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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 | } |