You copied the Doc URL to your clipboard.

wcsncasecmp()

Defined in wchar.h, this 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.

Syntax

int wcsncasecmp(const wchar_t * __restrict s1, const wchar_t * __restrict s2, size_t n);