AsmHighlighter.Lexer.Scanner.StringBuff.GetString C# (CSharp) Method

            public override string GetString(int beg, int end)
            {
                //  "end" can be greater than sLen with the BABEL
                //  option set.  Read returns a "virtual" EOL if
                //  an attempt is made to read past the end of the
                //  string buffer.  Without the guard any attempt 
                //  to fetch yytext for a token that includes the 
                //  EOL will throw an index exception.
                if (end > sLen) end = sLen;
                if (end <= beg) return ""; 
                else return str.Substring(beg, end - beg);
            }