swab(3) [netbsd man page]

SWAB(3) 						   BSD Library Functions Manual 						   SWAB(3)

NAME

     swab -- swap adjacent bytes

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <unistd.h>

     void
     swab(const void * restrict src, void * restrict dst, ssize_t len);

DESCRIPTION

     The function swab() copies len bytes from the location referenced by src to the location referenced by dst, swapping adjacent bytes.

     If len is negative or zero, swab() does nothing.  If len is odd, swab() copies len - 1 bytes and the disposition of the last byte is unspeci-
     fied.

SEE ALSO

     bzero(3), memset(3)

STANDARDS

     The swab() function conforms to IEEE Std 1003.1-2001 (``POSIX.1'').

HISTORY

     A swab() function appeared in Version 7 AT&T UNIX.  It was originally documented to be ``useful for carrying binary data between PDP11's and
     other machines''.

     In NetBSD 6.0 the type of len was changed from size_t to ssize_t for POSIX compliance.

BSD
								  April 30, 2010							       BSD

swab(3C)						   Standard C Library Functions 						  swab(3C)

NAME

       swab - swap bytes

SYNOPSIS

       #include <stdlib.h>

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

   XPG4, SUS, SUSv2, SUSv3
       #include <unistd.h>

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

DESCRIPTION

       The  swab()  function  copies  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 unspec-
       ified. If copying takes place between objects that overlap, the behavior is undefined. If nbytes is negative, swab() does nothing.

ERRORS

       No errors are defined.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5), standards(5)

SunOS 5.10							    1 Nov 2003								  swab(3C)