SWAB(3)			   Linux Programmer's Manual		       SWAB(3)



NAME
       swab - swap adjacent bytes

SYNOPSIS
       #define _XOPEN_SOURCE	   /* See feature_test_macros(7) */
       #include <unistd.h>

       void swab(const void *from, void *to, ssize_t n);

DESCRIPTION
       The swab() function copies n bytes from the array pointed to by from to
       the array pointed to by to, exchanging adjacent	even  and  odd	bytes.
       This  function is used to exchange data between machines that have dif-
       ferent low/high byte ordering.

       This function does nothing when n is negative.  When n is positive  and
       odd, it handles n-1 bytes as above, and does something unspecified with
       the last byte.  (In other words, n should be even.)

RETURN VALUE
       The swab() function returns no value.

ATTRIBUTES
       For  an	explanation  of	 the  terms  used   in	 this	section,   see
       attributes(7).

       +----------+---------------+---------+
       |Interface | Attribute	  | Value   |
       +----------+---------------+---------+
       |swab()	  | Thread safety | MT-Safe |
       +----------+---------------+---------+
CONFORMING TO
       POSIX.1-2001, POSIX.1-2008, SVr4, 4.3BSD.

SEE ALSO
       bstring(3)

COLOPHON
       This  page  is  part of release 4.10 of the Linux man-pages project.  A
       description of the project, information about reporting bugs,  and  the
       latest	  version     of     this    page,    can    be	   found    at
       https://www.kernel.org/doc/man-pages/.



				  2015-08-08			       SWAB(3)