Method substr

src/common/classes/fb_string.h:771–775

		}

		StringType substr(size_type pos = 0, size_type n = npos) const
		{
			adjustRange(length(), pos, n);
			return StringType(&c_str()[pos], n);
		}
		int compare(const StringType& str) const
		{
			return compare(str.c_str(), str.length());