wcsncasecmp()

The wcsncasecmp() function performs a case-insensitive string comparison test of not more than a specified number of wide characters. It is a GNU extension to the libraries. It is not POSIX-standardized.

int wcsncasecmp(const wchar_t * __restrict s1, const wchar_t * __restrict s2, size_t n) __attribute__((__nonnull__(1,2)));