Linux 2.6 - man page for swab (linux section 3)
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SWAB(3) Linux Programmer's Manual SWAB(3)
swab - swap adjacent bytes
#define _XOPEN_SOURCE /* See feature_test_macros(7) */
void swab(const void *from, void *to, ssize_t n);
The swab() function copies n bytes from the array pointed to by from to 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.
This function does nothing when n is negative. When n is positive and odd, it handles n-1
bytes as above, and does something unspecified with the last byte. (In other words, n
should be even.)
The swab() function returns no value.
SVr4, 4.3BSD, POSIX.1-2001.
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