Manpage of SWAB
SWABSection: Linux Programmer's Manual (3)
NAMEswab - swap adjacent bytes
#define _XOPEN_SOURCE /* See feature_test_macros(7) */ #include <unistd.h>void swab(const void *from, void *to, ssize_t n);
DESCRIPTIONThe swab() function copies nbytes from the array pointed to by fromto the array pointed to by to, exchanging adjacent even and odd bytes. This function is used to exchange data between machines that have different low/high byte ordering.
RETURN VALUEThe swab() function returns no value.
ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7).
CONFORMING TOPOSIX.1-2001, POSIX.1-2008, SVr4, 4.3BSD.
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Time: 22:27:53 GMT, June 20, 2016