1 /***********************************************************************
2 *                                                                      *
3 *               This software is part of the ast package               *
4 *          Copyright (c) 1985-2011 AT&T Intellectual Property          *
5 *                      and is licensed under the                       *
6 *                 Eclipse Public License, Version 1.0                  *
7 *                    by AT&T Intellectual Property                     *
8 *                                                                      *
9 *                A copy of the License is available at                 *
10 *          http://www.eclipse.org/org/documents/epl-v10.html           *
11 *         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
12 *                                                                      *
13 *              Information and Software Systems Research               *
14 *                            AT&T Research                             *
15 *                           Florham Park NJ                            *
16 *                                                                      *
17 *                 Glenn Fowler <gsf@research.att.com>                  *
18 *                  David Korn <dgk@research.att.com>                   *
19 *                   Phong Vo <kpv@research.att.com>                    *
20 *                                                                      *
21 ***********************************************************************/
22 #pragma prototyped
23 /*
24  * swab implementation
25  */
26 
27 #if defined(__STDPP__directive) && defined(__STDPP__hide)
28 __STDPP__directive pragma pp:hide swab
29 #else
30 #define swab		______swab
31 #endif
32 
33 #include <ast.h>
34 
35 #if defined(__STDPP__directive) && defined(__STDPP__hide)
36 __STDPP__directive pragma pp:nohide swab
37 #else
38 #undef	swab
39 #endif
40 
41 #if _lib_swab
42 
43 NoN(swab)
44 
45 #else
46 
47 #include <swap.h>
48 
49 #if defined(__EXPORT__)
50 #define extern	__EXPORT__
51 #endif
52 
53 extern void
54 swab(const void* src, void* dst, ssize_t n)
55 {
56 	if (n > 1)
57 		swapmem(1, src, dst, n & ~1);
58 }
59 
60 #endif
61