SWAB
Section: POSIX Programmer's Manual (3P)
Updated: 2017
Page Index
PROLOG
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.
NAME
swab
--- swap bytes
SYNOPSIS
#include <unistd.h>
void swab(const void *restrict src, void *restrict dest,
ssize_t nbytes);
DESCRIPTION
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.
RETURN VALUE
None.
ERRORS
No errors are defined.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
The Base Definitions volume of POSIX.1-2017,
<unistd.h>
COPYRIGHT
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 .