1SWAB(3P)                   POSIX Programmer's Manual                  SWAB(3P)
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PROLOG

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

12       swab — swap bytes
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SYNOPSIS

15       #include <unistd.h>
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17       void swab(const void *restrict src, void *restrict dest,
18           ssize_t nbytes);
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DESCRIPTION

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

29       None.
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ERRORS

32       No errors are defined.
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34       The following sections are informative.
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EXAMPLES

37       None.
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APPLICATION USAGE

40       None.
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RATIONALE

43       None.
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FUTURE DIRECTIONS

46       None.
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SEE ALSO

49       The Base Definitions volume of POSIX.1‐2017, <unistd.h>
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52       Portions  of  this text are reprinted and reproduced in electronic form
53       from IEEE Std 1003.1-2017, Standard for Information Technology --  Por‐
54       table  Operating System Interface (POSIX), The Open Group Base Specifi‐
55       cations Issue 7, 2018 Edition, Copyright (C) 2018 by the  Institute  of
56       Electrical  and  Electronics Engineers, Inc and The Open Group.  In the
57       event of any discrepancy between this version and the original IEEE and
58       The  Open Group Standard, the original IEEE and The Open Group Standard
59       is the referee document. The original Standard can be  obtained  online
60       at http://www.opengroup.org/unix/online.html .
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62       Any  typographical  or  formatting  errors that appear in this page are
63       most likely to have been introduced during the conversion of the source
64       files  to  man page format. To report such errors, see https://www.ker‐
65       nel.org/doc/man-pages/reporting_bugs.html .
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69IEEE/The Open Group                  2017                             SWAB(3P)
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