function is the wide-character equivalent of the
It compares the wide-character string pointed to
by s1 and the wide-character string
pointed to by s2, but at most
n wide characters from each string, ignoring case differences
function returns zero
if the wide-character strings at
s1 and s2,
truncated to at most length n, are equal except
for case distinctions.
It returns a positive integer if truncated s1 is
greater than truncated s2, ignoring case.
It returns a negative integer
if truncated s1 is smaller than truncated s2, ignoring case.
function is provided in glibc since version 2.1.
This function is not specified in POSIX.1-2001,
and is not widely available on other systems.
The behavior of
depends on the
category of the