iTextSharp.text.pdf.BarcodePDF417.BasicNumberCompaction C# (CSharp) Метод

        private void BasicNumberCompaction(byte[] input, int start, int length) {
            int ret = cwPtr;
            int retLast = length / 3;
            int ni, k;
            cwPtr += retLast + 1;
            for (k = 0; k <= retLast; ++k)
                codewords[ret + k] = 0;
            codewords[ret + retLast] = 1;
            length += start;
            for (ni = start; ni < length; ++ni) {
                // multiply by 10
                for (k = retLast; k >= 0; --k)
                    codewords[ret + k] *= 10;
                // add the digit
                codewords[ret + retLast] += input[ni] - '0';
                // propagate carry
                for (k = retLast; k > 0; --k) {
                    codewords[ret + k - 1] += codewords[ret + k] / 900;
                    codewords[ret + k] %= 900;
                }
            }
        }