internal static System.String decode(sbyte[] bytes, Version version) { BitSource bits = new BitSource(bytes); System.Text.StringBuilder result = new System.Text.StringBuilder(); Mode mode; do { // While still another segment to read... mode = Mode.forBits(bits.readBits(4)); // mode is encoded by 4 bits 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); } else if (mode.Equals(Mode.BYTE)) { decodeByteSegment(bits, result, count); } else if (mode.Equals(Mode.KANJI)) { decodeKanjiSegment(bits, result, count); } else { throw new ReaderException("Unsupported mode indicator"); } } }while (!mode.Equals(Mode.TERMINATOR)); // I thought it wasn't allowed to leave extra bytes after the terminator but it happens /* * int bitsLeft = bits.available(); * if (bitsLeft > 0) { * if (bitsLeft > 6 || bits.readBits(bitsLeft) != 0) { * throw new ReaderException("Excess bits or non-zero bits after terminator mode indicator"); * } * } */ return(result.ToString()); }
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)); }
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET: //ORIGINAL LINE: static com.google.zxing.common.DecoderResult decode(byte[] bytes, Version version, ErrorCorrectionLevel ecLevel, java.util.Map<com.google.zxing.DecodeHintType,?> hints) throws com.google.zxing.FormatException internal static DecoderResult decode(sbyte[] bytes, Version version, ErrorCorrectionLevel ecLevel, IDictionary <DecodeHintType, object> hints) { BitSource bits = new BitSource(bytes); StringBuilder result = new StringBuilder(50); IList <sbyte[]> byteSegments = new List <sbyte[]>(1); try { CharacterSetECI currentCharacterSetECI = null; bool fc1InEffect = false; 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 { mode = Mode.forBits(bits.readBits(4)); // mode is encoded by 4 bits } if (mode != Mode.TERMINATOR) { if (mode == Mode.FNC1_FIRST_POSITION || mode == 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 == Mode.STRUCTURED_APPEND) { if (bits.available() < 16) { throw FormatException.FormatInstance; } // 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 == Mode.ECI) { // Count doesn't apply to ECI int value = parseECIValue(bits); currentCharacterSetECI = CharacterSetECI.getCharacterSetECIByValue(value); if (currentCharacterSetECI == null) { throw FormatException.FormatInstance; } } else { // First handle Hanzi mode which does not start with character count if (mode == Mode.HANZI) { //chinese mode contains a sub set indicator right after mode indicator int subset = bits.readBits(4); int countHanzi = bits.readBits(mode.getCharacterCountBits(version)); if (subset == GB2312_SUBSET) { decodeHanziSegment(bits, result, countHanzi); } } else { // "Normal" QR code modes: // How many characters will follow, encoded in this mode? int count = bits.readBits(mode.getCharacterCountBits(version)); if (mode == Mode.NUMERIC) { decodeNumericSegment(bits, result, count); } else if (mode == Mode.ALPHANUMERIC) { decodeAlphanumericSegment(bits, result, count, fc1InEffect); } else if (mode == Mode.BYTE) { decodeByteSegment(bits, result, count, currentCharacterSetECI, byteSegments, hints); } else if (mode == Mode.KANJI) { decodeKanjiSegment(bits, result, count); } else { throw FormatException.FormatInstance; } } } } } while (mode != Mode.TERMINATOR); } catch (System.ArgumentException iae) { // from readBits() calls throw FormatException.FormatInstance; } return(new DecoderResult(bytes, result.ToString(), byteSegments.Count == 0 ? null : byteSegments, ecLevel == null ? null : ecLevel.ToString())); }