bsd man page for swab

SWAB(3) 						     Library Functions Manual							   SWAB(3)

NAME
       swab - swap bytes

SYNOPSIS
       swab(from, to, nbytes)
       char *from, *to;

DESCRIPTION
       Swab  copies  nbytes  bytes  pointed to by from to the position pointed to by to, exchanging adjacent even and odd bytes.  It is useful for
       carrying binary data between PDP11's and other machines.  Nbytes should be even.

7th Edition							   May 15, 1985 							   SWAB(3)