Method compare

src/common/classes/fb_string.h:776–779

			return StringType(&c_str()[pos], n);
		}
		int compare(const StringType& str) const
		{
			return compare(str.c_str(), str.length());
		}
		int compare(size_type p0, size_type n0, const StringType& str)
		{
			return compare(p0, n0, str.c_str(), str.length());