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
   different 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 4.09 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)

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