/// <summary> /// /// ISO/IEC 18004:2006(E) /// Table 2 ¡ª Mode indicators for QR Code 2005 /// </summary> /// <param name="bytes"></param> /// <param name="version"></param> /// <param name="ecLevel"></param> /// <returns></returns> internal static DecoderResult decode(sbyte[] bytes, Version version, ErrorCorrectionLevel ecLevel) { BitSource bits = new BitSource(bytes); System.Text.StringBuilder result = new System.Text.StringBuilder(50); CharacterSetECI currentCharacterSetECI = null; bool fc1InEffect = false; System.Collections.ArrayList byteSegments = System.Collections.ArrayList.Synchronized(new System.Collections.ArrayList(1)); Mode mode = Mode.TERMINATOR; int bitLen = Mode.NUMERIC.getBitsLength(version.VersionNumber); if (version.VersionNumber > 1) { try { mode = Mode.forBits(bits.readBits(bitLen)); } catch (System.ArgumentException iae) { throw ReaderException.Instance; } } else { mode = Mode.NUMERIC; } if (!mode.Equals(Mode.TERMINATOR)) { // How many characters will follow, encoded in this mode? int count = bits.readBits(mode.getCharacterCountBits(version)); if (mode.Equals(Mode.NUMERIC)) { decodeNumericSegment(bits, result, count); } else if (mode.Equals(Mode.ALPHANUMERIC)) { decodeAlphanumericSegment(bits, result, count, fc1InEffect); } else if (mode.Equals(Mode.BYTE)) { decodeByteSegment(bits, result, count, currentCharacterSetECI, byteSegments); } else if (mode.Equals(Mode.KANJI)) { decodeKanjiSegment(bits, result, count); } else { throw ReaderException.Instance; } } return(new DecoderResult(bytes, result.ToString(), (byteSegments.Count == 0) ? null : byteSegments, ecLevel)); }
private static void decodeByteSegment(BitSource bits, System.Text.StringBuilder result, int count, CharacterSetECI currentCharacterSetECI, System.Collections.ArrayList byteSegments) { sbyte[] readBytes = new sbyte[count]; if (count << 3 > bits.available()) { throw ReaderException.Instance; } for (int i = 0; i < count; i++) { readBytes[i] = (sbyte) bits.readBits(8); } System.String encoding; if (currentCharacterSetECI == null) { // The spec isn't clear on this mode; see // section 6.4.5: t does not say which encoding to assuming // upon decoding. I have seen ISO-8859-1 used as well as // Shift_JIS -- without anything like an ECI designator to // give a hint. encoding = guessEncoding(readBytes); } else { encoding = currentCharacterSetECI.EncodingName; } try { //UPGRADE_TODO: The differences in the Format of parameters for constructor 'java.lang.String.String' may cause compilation errors. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1092'" result.Append(System.Text.Encoding.GetEncoding(encoding).GetString(SupportClass.ToByteArray(readBytes))); } catch (System.IO.IOException) { throw ReaderException.Instance; } byteSegments.Add(SupportClass.ToByteArray(readBytes)); }
internal static DecoderResult decode(sbyte[] bytes, Version version, ErrorCorrectionLevel ecLevel) { BitSource bits = new BitSource(bytes); System.Text.StringBuilder result = new System.Text.StringBuilder(50); CharacterSetECI currentCharacterSetECI = null; bool fc1InEffect = false; System.Collections.ArrayList byteSegments = System.Collections.ArrayList.Synchronized(new System.Collections.ArrayList(1)); Mode mode; do { // While still another segment to read... if (bits.available() < 4) { // OK, assume we're done. Really, a TERMINATOR mode should have been recorded here mode = Mode.TERMINATOR; } else { try { mode = Mode.forBits(bits.readBits(4)); // mode is encoded by 4 bits } catch (System.ArgumentException iae) { throw ReaderException.Instance; } } if (!mode.Equals(Mode.TERMINATOR)) { if (mode.Equals(Mode.FNC1_FIRST_POSITION) || mode.Equals(Mode.FNC1_SECOND_POSITION)) { // We do little with FNC1 except alter the parsed result a bit according to the spec fc1InEffect = true; } else if (mode.Equals(Mode.STRUCTURED_APPEND)) { // not really supported; all we do is ignore it // Read next 8 bits (symbol sequence #) and 8 bits (parity data), then continue bits.readBits(16); } else if (mode.Equals(Mode.ECI)) { // Count doesn't apply to ECI int value_Renamed = parseECIValue(bits); currentCharacterSetECI = CharacterSetECI.getCharacterSetECIByValue(value_Renamed); if (currentCharacterSetECI == null) { throw ReaderException.Instance; } } else { // How many characters will follow, encoded in this mode? int count = bits.readBits(mode.getCharacterCountBits(version)); if (mode.Equals(Mode.NUMERIC)) { decodeNumericSegment(bits, result, count); } else if (mode.Equals(Mode.ALPHANUMERIC)) { decodeAlphanumericSegment(bits, result, count, fc1InEffect); } else if (mode.Equals(Mode.BYTE)) { decodeByteSegment(bits, result, count, currentCharacterSetECI, byteSegments); } else if (mode.Equals(Mode.KANJI)) { decodeKanjiSegment(bits, result, count); } else { throw ReaderException.Instance; } } } }while (!mode.Equals(Mode.TERMINATOR)); return(new DecoderResult(bytes, result.ToString(), (byteSegments.Count == 0)?null:byteSegments, ecLevel)); }
private static void decodeByteSegment(BitSource bits, System.Text.StringBuilder result, int count, CharacterSetECI currentCharacterSetECI, System.Collections.ArrayList byteSegments) { sbyte[] readBytes = new sbyte[count]; if (count << 3 > bits.available()) { throw ReaderException.Instance; } for (int i = 0; i < count; i++) { readBytes[i] = (sbyte)bits.readBits(8); } System.String encoding; if (currentCharacterSetECI == null) { // The spec isn't clear on this mode; see // section 6.4.5: t does not say which encoding to assuming // upon decoding. I have seen ISO-8859-1 used as well as // Shift_JIS -- without anything like an ECI designator to // give a hint. encoding = guessEncoding(readBytes); } else { encoding = currentCharacterSetECI.EncodingName; } try { //UPGRADE_TODO: The differences in the Format of parameters for constructor 'java.lang.String.String' may cause compilation errors. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1092'" #if WINDOWS_PHONE byte[] byteArray = SupportClass.ToByteArray(readBytes); result.Append(System.Text.Encoding.GetEncoding(encoding).GetString(byteArray, 0, byteArray.Length)); #else result.Append(System.Text.Encoding.GetEncoding(encoding).GetString(SupportClass.ToByteArray(readBytes))); #endif } catch (System.IO.IOException uce) { throw ReaderException.Instance; } byteSegments.Add(SupportClass.ToByteArray(readBytes)); }
private static void appendECI(CharacterSetECI eci, BitVector bits) { bits.appendBits(Mode.ECI.Bits, 4); // This is correct for values up to 127, which is all we need now. bits.appendBits(eci.Value, 8); }
internal static void encode(System.String content, ErrorCorrectionLevelInternal m_EcLevelInternal, System.Collections.Hashtable hints, QRCodeInternal qrCodeInternal) { System.String encoding = hints == null ? null : (System.String)hints[EncodeHintType.CHARACTER_SET]; if (encoding == null) { encoding = DEFAULT_BYTE_MODE_ENCODING; } // Step 1: Choose the mode (encoding). Mode mode = chooseMode(content, encoding); // Step 2: Append "bytes" into "dataBits" in appropriate encoding. BitVector dataBits = new BitVector(); appendBytes(content, mode, dataBits, encoding); // Step 3: Initialize QR code that can contain "dataBits". int numInputBytes = dataBits.sizeInBytes(); initQRCode(numInputBytes, m_EcLevelInternal, mode, qrCodeInternal); // Step 4: Build another bit vector that contains header and data. BitVector headerAndDataBits = new BitVector(); // Step 4.5: Append ECI message if applicable if (mode == Mode.BYTE && !DEFAULT_BYTE_MODE_ENCODING.Equals(encoding)) { CharacterSetECI eci = CharacterSetECI.getCharacterSetECIByName(encoding); if (eci != null) { appendECI(eci, headerAndDataBits); } } appendModeInfo(mode, headerAndDataBits); int numLetters = mode.Equals(Mode.BYTE) ? dataBits.sizeInBytes() : content.Length; appendLengthInfo(numLetters, qrCodeInternal.Version, mode, headerAndDataBits); headerAndDataBits.appendBitVector(dataBits); // Step 5: Terminate the bits properly. terminateBits(qrCodeInternal.NumDataBytes, headerAndDataBits); // Step 6: Interleave data bits with error correction code. BitVector finalBits = new BitVector(); interleaveWithECBytes(headerAndDataBits, qrCodeInternal.NumTotalBytes, qrCodeInternal.NumDataBytes, qrCodeInternal.NumRSBlocks, finalBits); // Step 7: Choose the mask pattern and set to "QRCodeInternal". ByteMatrix matrix = new ByteMatrix(qrCodeInternal.MatrixWidth, qrCodeInternal.MatrixWidth); qrCodeInternal.MaskPattern = chooseMaskPattern(finalBits, qrCodeInternal.EcLevelInternal, qrCodeInternal.Version, matrix); // Step 8. Build the matrix and set it to "QRCodeInternal". MatrixUtil.buildMatrix(finalBits, qrCodeInternal.EcLevelInternal, qrCodeInternal.Version, qrCodeInternal.MaskPattern, matrix); qrCodeInternal.Matrix = matrix; // Step 9. Make sure we have a valid QR Code. if (!qrCodeInternal.Valid) { throw new WriterException("Invalid QR code: " + qrCodeInternal.ToString()); } }
internal static void appendECI(CharacterSetECI eci, BitVector bits) { bits.appendBits(Mode.ECI.Bits, 4); // This is correct for values up to 127, which is all we need now. bits.appendBits(eci.Value, 8); }