/// <param name="val">ECI value</param>
/// <returns><see cref="ECI"/> representing ECI of given value, or null if it is legal but unsupported</returns>
/// <throws>ArgumentException if ECI value is invalid </throws>
public static ECI getECIByValue(int val)
{
if (val < 0 || val > 999999)
{
throw new System.ArgumentException("Bad ECI value: " + val);
}
if (val < 900)
{
// Character set ECIs use 000000 - 000899
return(CharacterSetECI.getCharacterSetECIByValue(val));
}
return(null);
}
public bool AppendECI(int value)
{
encodeCurrentBytesIfAny();
CharacterSetECI characterSetECI = CharacterSetECI.getCharacterSetECIByValue(value);
if (characterSetECI == null)
{
return(false);
//throw FormatException.getFormatInstance(new RuntimeException("Unsupported ECI value " + value));
}
currentCharset = CharacterSetECI.getEncoding(characterSetECI);
return(true);
}
/// <param name="value">ECI value
/// </param>
/// <returns> {@link ECI} representing ECI of given value, or null if it is legal but unsupported
/// </returns>
/// <throws> IllegalArgumentException if ECI value is invalid </throws>
internal static ECI getECIByValue(int value_Renamed)
{
if (value_Renamed < 0 || value_Renamed > 999999)
{
throw new System.ArgumentException("Bad ECI value: " + value_Renamed);
}
if (value_Renamed < 900)
{
// Character set ECIs use 000000 - 000899
return(CharacterSetECI.getCharacterSetECIByValue(value_Renamed));
}
return(null);
}
/// <summary>
/// Gets the string encoded in the aztec code bits
/// </summary>
/// <param name="correctedBits">The corrected bits.</param>
/// <returns>the decoded string</returns>
private static String getEncodedData(bool[] correctedBits)
{
var endIndex = correctedBits.Length;
var latchTable = Table.UPPER; // table most recently latched to
var shiftTable = Table.UPPER; // table to use for the next read
var strTable = UPPER_TABLE;
var index = 0;
// Final decoded string result
// (correctedBits-5) / 4 is an upper bound on the size (all-digit result)
var result = new StringBuilder((correctedBits.Length - 5) / 4);
// Intermediary buffer of decoded bytes, which is decoded into a string and flushed
// when character encoding changes (ECI) or input ends.
using (var decodedBytes = new System.IO.MemoryStream())
{
var encoding = DEFAULT_ENCODING;
while (index < endIndex)
{
if (shiftTable == Table.BINARY)
{
if (endIndex - index < 5)
{
break;
}
int length = readCode(correctedBits, index, 5);
index += 5;
if (length == 0)
{
if (endIndex - index < 11)
{
break;
}
length = readCode(correctedBits, index, 11) + 31;
index += 11;
}
for (int charCount = 0; charCount < length; charCount++)
{
if (endIndex - index < 8)
{
index = endIndex; // Force outer loop to exit
break;
}
int code = readCode(correctedBits, index, 8);
decodedBytes.WriteByte((byte)code);
index += 8;
}
// Go back to whatever mode we had been in
shiftTable = latchTable;
strTable = codeTables[shiftTable];
}
else
{
int size = shiftTable == Table.DIGIT ? 4 : 5;
if (endIndex - index < size)
{
break;
}
int code = readCode(correctedBits, index, size);
index += size;
String str = getCharacter(strTable, code);
if ("FLG(n)".Equals(str))
{
if (endIndex - index < 3)
{
break;
}
int n = readCode(correctedBits, index, 3);
index += 3;
// flush bytes, FLG changes state
if (decodedBytes.Length > 0)
{
var byteArray = decodedBytes.ToArray();
result.Append(encoding.GetString(byteArray, 0, byteArray.Length));
decodedBytes.SetLength(0);
}
switch (n)
{
case 0:
result.Append((char)29); // translate FNC1 as ASCII 29
break;
case 7:
throw new FormatException("FLG(7) is reserved and illegal");
default:
// ECI is decimal integer encoded as 1-6 codes in DIGIT mode
int eci = 0;
if (endIndex - index < 4 * n)
{
break;
}
while (n-- > 0)
{
int nextDigit = readCode(correctedBits, index, 4);
index += 4;
if (nextDigit < 2 || nextDigit > 11)
{
throw new FormatException("Not a decimal digit");
}
eci = eci * 10 + (nextDigit - 2);
}
CharacterSetECI charsetECI = CharacterSetECI.getCharacterSetECIByValue(eci);
encoding = CharacterSetECI.getEncoding(charsetECI);
if (encoding == null)
{
throw new FormatException("Encoding for ECI " + eci + " can't be resolved");
}
break;
}
// Go back to whatever mode we had been in
shiftTable = latchTable;
strTable = codeTables[shiftTable];
}
else if (str.StartsWith("CTRL_"))
{
// Table changes
// ISO/IEC 24778:2008 prescribes ending a shift sequence in the mode from which it was invoked.
// That's including when that mode is a shift.
// Our test case dlusbs.png for issue #642 exercises that.
latchTable = shiftTable; // Latch the current mode, so as to return to Upper after U/S B/S
shiftTable = getTable(str[5]);
strTable = codeTables[shiftTable];
if (str[6] == 'L')
{
latchTable = shiftTable;
}
}
else
{
// Though stored as a table of strings for convenience, codes actually represent 1 or 2 *bytes*.
#if (PORTABLE || NETSTANDARD1_0 || NETSTANDARD1_1 || WINDOWS_PHONE || NETFX_CORE || SILVERLIGHT)
var b = StringUtils.PLATFORM_DEFAULT_ENCODING_T.GetBytes(str);
#else
var b = Encoding.ASCII.GetBytes(str);
#endif
decodedBytes.Write(b, 0, b.Length);
// Go back to whatever mode we had been in
shiftTable = latchTable;
strTable = codeTables[shiftTable];
}
}
}
if (decodedBytes.Length > 0)
{
var byteArray = decodedBytes.ToArray();
result.Append(encoding.GetString(byteArray, 0, byteArray.Length));
}
}
return(result.ToString());
}
internal static DecoderResult decode(byte[] bytes,
Version version,
ErrorCorrectionLevel ecLevel,
IDictionary <DecodeHintType, object> hints)
{
var bits = new BitSource(bytes);
var result = new StringBuilder(50);
var byteSegments = new List <byte[]> (1);
var symbolSequence = -1;
var parityData = -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
{
try {
mode = Mode.forBits(bits.readBits(4)); // mode is encoded by 4 bits
} catch (ArgumentException) {
return(null);
}
}
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)
{
return(null);
}
// not really supported; but sequence number and parity is added later to the result metadata
// Read next 8 bits (symbol sequence #) and 8 bits (parity data), then continue
symbolSequence = bits.readBits(8);
parityData = bits.readBits(8);
}
else if (mode == Mode.ECI)
{
// Count doesn't apply to ECI
int value = parseECIValue(bits);
currentCharacterSetECI = CharacterSetECI.getCharacterSetECIByValue(value);
if (currentCharacterSetECI == null)
{
return(null);
}
}
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)
{
if (!decodeHanziSegment(bits, result, countHanzi))
{
return(null);
}
}
}
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)
{
if (!decodeNumericSegment(bits, result, count))
{
return(null);
}
}
else if (mode == Mode.ALPHANUMERIC)
{
if (!decodeAlphanumericSegment(bits, result, count, fc1InEffect))
{
return(null);
}
}
else if (mode == Mode.BYTE)
{
if (!decodeByteSegment(bits, result, count, currentCharacterSetECI, byteSegments, hints))
{
return(null);
}
}
else if (mode == Mode.KANJI)
{
if (!decodeKanjiSegment(bits, result, count))
{
return(null);
}
}
else
{
return(null);
}
}
}
}
} while (mode != Mode.TERMINATOR);
} catch (ArgumentException) {
// from readBits() calls
return(null);
}
#if WindowsCE
var resultString = result.ToString().Replace("\n", "\r\n");
#else
var resultString = result.ToString().Replace("\r\n", "\n").Replace("\n", Environment.NewLine);
#endif
return(new DecoderResult(bytes,
resultString,
byteSegments.Count == 0 ? null : byteSegments,
ecLevel == null ? null : ecLevel.ToString(),
symbolSequence, parityData));
}
internal static DecoderResult decode(int[] codewords, String ecLevel)
{
var result = new StringBuilder(codewords.Length * 2);
// Get compaction mode
int codeIndex = 1;
int code = codewords[codeIndex++];
var resultMetadata = new PDF417ResultMetadata();
Encoding encoding = null;
while (codeIndex < codewords[0])
{
switch (code)
{
case TEXT_COMPACTION_MODE_LATCH:
codeIndex = textCompaction(codewords, codeIndex, result);
break;
case BYTE_COMPACTION_MODE_LATCH:
case BYTE_COMPACTION_MODE_LATCH_6:
codeIndex = byteCompaction(code, codewords, encoding ?? (encoding = getEncoding(PDF417HighLevelEncoder.DEFAULT_ENCODING_NAME)), codeIndex, result);
break;
case MODE_SHIFT_TO_BYTE_COMPACTION_MODE:
result.Append((char)codewords[codeIndex++]);
break;
case NUMERIC_COMPACTION_MODE_LATCH:
codeIndex = numericCompaction(codewords, codeIndex, result);
break;
case ECI_CHARSET:
var charsetECI = CharacterSetECI.getCharacterSetECIByValue(codewords[codeIndex++]);
encoding = getEncoding(charsetECI.EncodingName);
break;
case ECI_GENERAL_PURPOSE:
// Can't do anything with generic ECI; skip its 2 characters
codeIndex += 2;
break;
case ECI_USER_DEFINED:
// Can't do anything with user ECI; skip its 1 character
codeIndex++;
break;
case BEGIN_MACRO_PDF417_CONTROL_BLOCK:
codeIndex = decodeMacroBlock(codewords, codeIndex, resultMetadata);
break;
case BEGIN_MACRO_PDF417_OPTIONAL_FIELD:
case MACRO_PDF417_TERMINATOR:
// Should not see these outside a macro block
return(null);
default:
// Default to text compaction. During testing numerous barcodes
// appeared to be missing the starting mode. In these cases defaulting
// to text compaction seems to work.
codeIndex--;
codeIndex = textCompaction(codewords, codeIndex, result);
break;
}
if (codeIndex < 0)
{
return(null);
}
if (codeIndex < codewords.Length)
{
code = codewords[codeIndex++];
}
else
{
return(null);
}
}
if (result.Length == 0)
{
return(null);
}
var decoderResult = new DecoderResult(null, result.ToString(), null, ecLevel);
decoderResult.Other = resultMetadata;
return(decoderResult);
}
//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()));
}