iTextSharp.text.pdf.CFFFontSubset.StackOpp C# (CSharp) Метод

        protected int StackOpp()
        {
            if (key == "ifelse")
                return -3;
            if (key == "roll" || key == "put")
                return -2;
            if (key == "callsubr" || key == "callgsubr" || key == "add" || key == "sub" ||
                key == "div" || key == "mul" || key == "drop" || key == "and" ||
                key == "or" || key == "eq")
                return -1;
            if (key == "abs" || key == "neg" || key == "sqrt" || key == "exch" ||
                key == "index" || key == "get" || key == "not" || key == "return")
                return 0;
            if (key == "random" || key == "dup")
                return 1;
            return 2;
        }