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.
The following sections are informative.
The Base Definitions volume of IEEE Std 1003.1-2001, <unistd.h>
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 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