This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface

       None.

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard
       for Information  Technology  --  Portable  Operating  System  Interface  (POSIX),  The  Open  Group  Base
       Specifications  Issue  7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics
       Engineers, Inc and The Open Group.  In the event of any discrepancy between this version and the original
       IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee  document.
       The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

       Any  typographical  or formatting errors that appear in this page are most likely to have been introduced
       during  the  conversion  of  the  source  files  to  man  page  format.  To  report  such   errors,   see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group                                   2017                                          SWAB(3POSIX)

       The  swab()  function  shall  copy nbytes bytes, which are pointed to by src, to the object pointed to by
       dest, exchanging adjacent bytes. The nbytes argument should be even. If nbytes is odd, swab() copies  and
       exchanges  nbytes-1  bytes  and  the  disposition of the last byte is unspecified. If copying takes place
       between objects that overlap, the behavior is undefined.  If nbytes is negative, swab() does nothing.

       No errors are defined.

       Thefollowingsectionsareinformative.

       None.

       None.

       swab — swap bytes

       This  manual  page  is part of the POSIX Programmer's Manual.  The Linux implementation of this interface
       may differ (consult the corresponding Linux manual page for details of Linux behavior), or the  interface
       may not be implemented on Linux.

       None.

       None.

       The Base Definitions volume of POSIX.1‐2017, <unistd.h>

       #include <unistd.h>

       void swab(const void *restrict src, void *restrict dest,
           ssize_t nbytes);