iTextSharp.text.pdf.qrcode.BitVector.Xor C# (CSharp) Method

        public void Xor(BitVector other) {
            if (sizeInBits != other.Size()) {
                throw new ArgumentException("BitVector sizes don't match");
            }
            int sizeInBytes = (sizeInBits + 7) >> 3;
            for (int i = 0; i < sizeInBytes; ++i) {
                // The last byte could be incomplete (i.e. not have 8 bits in
                // it) but there is no problem since 0 XOR 0 == 0.
                array[i] ^= other.array[i];
            }
        }

        // Make bit vector of type information. On success, store the result in "bits" and return true.
        // Encode error correction level and mask pattern. See 8.9 of
        // JISX0510:2004 (p.45) for details.
        public static void MakeTypeInfoBits(ErrorCorrectionLevel ecLevel, int maskPattern, BitVector bits)
        {
            if (!QRCode.IsValidMaskPattern(maskPattern))
            {
                throw new WriterException("Invalid mask pattern");
            }
            int typeInfo = (ecLevel.GetBits() << 3) | maskPattern;

            bits.AppendBits(typeInfo, 5);

            int bchCode = CalculateBCHCode(typeInfo, TYPE_INFO_POLY);

            bits.AppendBits(bchCode, 10);

            BitVector maskBits = new BitVector();

            maskBits.AppendBits(TYPE_INFO_MASK_PATTERN, 15);
            bits.Xor(maskBits);

            if (bits.Size() != 15)    // Just in case.
            {
                throw new WriterException("should not happen but we got: " + bits.Size());
            }
        }