NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | CONFORMING TO | SEE ALSO | COLOPHON 

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

NAME         top

       swab - swap adjacent bytes

SYNOPSIS         top

       #define _XOPEN_SOURCE       /* See feature_test_macros(7) */
       #include <unistd.h>
       void swab(const void *from, void *to, ssize_t n);

DESCRIPTION         top

       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         top

       The swab() function returns no value.

ATTRIBUTES         top

       For an explanation of the terms used in this section, see
       attributes(7).
       ┌──────────┬───────────────┬─────────┐
       │Interface │ Attribute     │ Value   │
       ├──────────┼───────────────┼─────────┤
       │swab()    │ Thread safety │ MT-Safe │
       └──────────┴───────────────┴─────────┘

CONFORMING TO         top

       POSIX.1-2001, POSIX.1-2008, SVr4, 4.3BSD.

SEE ALSO         top

       bstring(3)

COLOPHON         top

       This page is part of release 4.12 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)

Pages that refer to this page: bzero(3),  memset(3)