usr/src/lib/libast/common/comp/swab.c

   1 /***********************************************************************
   2 *                                                                      *
   3 *               This software is part of the ast package               *
   4 *          Copyright (c) 1985-2010 AT&T Intellectual Property          *
   5 *                      and is licensed under the                       *
   6 *                  Common Public License, Version 1.0                  *
   7 *                    by AT&T Intellectual Property                     *
   8 *                                                                      *
   9 *                A copy of the License is available at                 *
  10 *            http://www.opensource.org/licenses/cpl1.0.txt             *
  11 *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
  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