.nf
.BR "#define _XOPEN_SOURCE" " /* See feature_test_macros(7) */"
.B #include <unistd.h>
-.PP
+.P
.BI "void swab(const void " from "[restrict ." n "], void " to "[restrict ." n ],
.BI " ssize_t " n );
.fi
adjacent even and odd bytes.
This function is used to exchange data
between machines that have different low/high byte ordering.
-.PP
+.P
This function does nothing when
.I n
is negative.