wcsncasecmp - compare two fixed-size wide-character strings, ignoring case
s1, const wchar_t *s2, size_t n);
The wcsncasecmp function is the wide-character
equivalent of the strncasecmp function. 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 (towupper, towlower).
The wcsncasecmp 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
This function is a GNU extension.
The behaviour of wcsncasecmp depends on the LC_CTYPE
category of the current locale.