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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 .