swab - swap adjacent bytes
#define _XOPEN_SOURCE /* See feature_test_macros(7) */
void swab(const void *restrict from, void *restrict 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
The swab() function returns no value.
For an explanation of the terms used in this section, see attributes(7).
POSIX.1-2001, POSIX.1-2008, SVr4, 4.3BSD.
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