private static bool decodeByteSegment(BitSource bits,
StringBuilder result,
int count,
CharacterSetECI currentCharacterSetECI,
IList <byte[]> byteSegments,
IDictionary <DecodeHintType, object> hints)
{
// Don't crash trying to read more bits than we have available.
if (count << 3 > bits.available())
{
return(false);
}
byte[] readBytes = new byte[count];
for (int i = 0; i < count; i++)
{
readBytes[i] = (byte)bits.readBits(8);
}
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 = StringUtils.guessEncoding(readBytes, hints);
}
else
{
encoding = currentCharacterSetECI.EncodingName;
}
try
{
result.Append(Encoding.GetEncoding(encoding).GetString(readBytes, 0, readBytes.Length));
}
#if WindowsCE
catch (PlatformNotSupportedException)
{
// WindowsCE doesn't support all encodings. But it is device depended.
// So we try here the some different ones
if (encoding == "ISO-8859-1")
{
result.Append(Encoding.GetEncoding(1252).GetString(readBytes, 0, readBytes.Length));
}
else
{
result.Append(Encoding.GetEncoding("UTF-8").GetString(readBytes, 0, readBytes.Length));
}
}
#endif
catch (Exception)
{
return(false);
}
byteSegments.Add(readBytes);
return(true);
}
/**
* See ISO 16022:2006, 5.2.8 and Annex C Table C.3
*/
private static void decodeEdifactSegment(BitSource bits, StringBuilder result)
{
bool unlatch = false;
do
{
// If there is only two or less bytes left then it will be encoded as ASCII
if (bits.available() <= 16)
{
return;
}
for (int i = 0; i < 4; i++)
{
int edifactValue = bits.readBits(6);
// Check for the unlatch character
if (edifactValue == 0x2B67) // 011111
{
unlatch = true;
// If we encounter the unlatch code then continue reading because the Codeword triple
// is padded with 0's
}
if (!unlatch)
{
if ((edifactValue & 32) == 0) // no 1 in the leading (6th) bit
{
edifactValue |= 64; // Add a leading 01 to the 6 bit binary value
}
result.Append(edifactValue);
}
}
} while (!unlatch && bits.available() > 0);
}
/**
* See ISO 16022:2006, 5.2.9 and Annex B, B.2
*/
private static void decodeBase256Segment(BitSource bits, StringBuilder result, System.Collections.ArrayList byteSegments)
{
// Figure out how long the Base 256 Segment is.
int d1 = bits.readBits(8);
int count;
if (d1 == 0) // Read the remainder of the symbol
{
count = bits.available() / 8;
}
else if (d1 < 250)
{
count = d1;
}
else
{
count = 250 * (d1 - 249) + bits.readBits(8);
}
byte[] bytes = new byte[count];
for (int i = 0; i < count; i++)
{
bytes[i] = unrandomize255State(bits.readBits(8), i);
}
byteSegments.Add(bytes);
try {
result.Append(System.Text.Encoding.GetEncoding("iso-8859-1").GetString(bytes));
} catch (Exception uee) {
throw new Exception("Platform does not support required encoding: " + uee);
}
}
/// <summary>
/// See ISO 16022:2006, 5.2.8 and Annex C Table C.3
/// </summary>
private static void decodeEdifactSegment(BitSource bits, StringBuilder result)
{
do
{
// If there is only two or less bytes left then it will be encoded as ASCII
if (bits.available() <= 16)
{
return;
}
for (int i = 0; i < 4; i++)
{
int edifactValue = bits.readBits(6);
// Check for the unlatch character
if (edifactValue == 0x1F) // 011111
{
// Read rest of byte, which should be 0, and stop
int bitsLeft = 8 - bits.BitOffset;
if (bitsLeft != 8)
{
bits.readBits(bitsLeft);
}
return;
}
if ((edifactValue & 0x20) == 0) // no 1 in the leading (6th) bit
{
edifactValue |= 0x40; // Add a leading 01 to the 6 bit binary value
}
result.Append((char)edifactValue);
}
} while (bits.available() > 0);
}
private static void decodeByteSegment(BitSource bits, System.Text.StringBuilder result, int count)
{
sbyte[] readBytes = new sbyte[count];
if (count << 3 > bits.available())
{
throw new ReaderException("Count too large: " + count);
}
for (int i = 0; i < count; i++)
{
readBytes[i] = (sbyte)bits.readBits(8);
}
// 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.
System.String encoding = guessEncoding(readBytes);
try
{
byte[] bytes = SupportClass.ToByteArray(readBytes);
//System.Windows.Forms.MessageBox.Show("encodings: "+ System.Text.Encoding.());
//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(bytes, 0, bytes.Length));
}
catch (System.IO.IOException uce)
{
//UPGRADE_TODO: The equivalent in .NET for method 'java.lang.Throwable.toString' may return a different value. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1043'"
throw new ReaderException(uce.ToString());
}
}
/// <summary>
/// See ISO 16022:2006, 5.2.9 and Annex B, B.2
/// </summary>
private static bool decodeBase256Segment(BitSource bits,
StringBuilder result,
IList <byte[]> byteSegments)
{
// Figure out how long the Base 256 Segment is.
int codewordPosition = 1 + bits.ByteOffset; // position is 1-indexed
int d1 = unrandomize255State(bits.readBits(8), codewordPosition++);
int count;
if (d1 == 0)
{
// Read the remainder of the symbol
count = bits.available() / 8;
}
else if (d1 < 250)
{
count = d1;
}
else
{
count = 250 * (d1 - 249) + unrandomize255State(bits.readBits(8), codewordPosition++);
}
// We're seeing NegativeArraySizeException errors from users.
if (count < 0)
{
return(false);
}
byte[] bytes = new byte[count];
for (int i = 0; i < count; i++)
{
// Have seen this particular error in the wild, such as at
// http://www.bcgen.com/demo/IDAutomationStreamingDataMatrix.aspx?MODE=3&D=Fred&PFMT=3&PT=F&X=0.3&O=0&LM=0.2
if (bits.available() < 8)
{
return(false);
}
bytes[i] = (byte)unrandomize255State(bits.readBits(8), codewordPosition++);
}
byteSegments.Add(bytes);
try
{
#if (WINDOWS_PHONE || SILVERLIGHT4 || SILVERLIGHT5 || NETFX_CORE || WindowsCE || PORTABLE)
#if WindowsCE
result.Append(Encoding.GetEncoding(1252).GetString(bytes, 0, bytes.Length));
#else
result.Append(Encoding.GetEncoding("ISO-8859-1").GetString(bytes, 0, bytes.Length));
#endif
#else
result.Append(Encoding.GetEncoding("ISO-8859-1").GetString(bytes));
#endif
}
catch (Exception uee)
{
throw new InvalidOperationException("Platform does not support required encoding: " + uee);
}
return(true);
}
private static bool DecodeKanjiSegment(BitSource bits,
StringBuilder result,
int count)
{
// Don't crash trying to read more bits than we have available.
if (count * 13 > bits.Available())
{
return(false);
}
// Each character will require 2 bytes. Read the characters as 2-byte pairs
// and decode as Shift_JIS afterwards
byte[] buffer = new byte[2 * count];
int offset = 0;
while (count > 0)
{
// Each 13 bits encodes a 2-byte character
int twoBytes = bits.ReadBits(13);
int assembledTwoBytes = ((twoBytes / 0x0C0) << 8) | (twoBytes % 0x0C0);
if (assembledTwoBytes < 0x01F00)
{
// In the 0x8140 to 0x9FFC range
assembledTwoBytes += 0x08140;
}
else
{
// In the 0xE040 to 0xEBBF range
assembledTwoBytes += 0x0C140;
}
buffer[offset] = (byte)(assembledTwoBytes >> 8);
buffer[offset + 1] = (byte)assembledTwoBytes;
offset += 2;
count--;
}
// Shift_JIS may not be supported in some environments:
try
{
result.Append(Encoding.GetEncoding(StringUtils.SHIFT_JIS).GetString(buffer, 0, buffer.Length));
}
#if (WINDOWS_PHONE70 || WINDOWS_PHONE71 || SILVERLIGHT4 || SILVERLIGHT5 || NETFX_CORE || MONOANDROID || MONOTOUCH)
catch (ArgumentException)
{
try
{
// Silverlight only supports a limited number of character sets, trying fallback to UTF-8
result.Append(Encoding.GetEncoding("UTF-8").GetString(buffer, 0, buffer.Length));
}
catch (Exception)
{
return(false);
}
}
#endif
catch (Exception)
{
return(false);
}
return(true);
}
/**
* See ISO 16022:2007, 5.4.1
*/
private static bool decodeECISegment(BitSource bits, ECIStringBuilder result)
{
if (bits.available() < 8)
{
return(false);
}
int c1 = bits.readBits(8);
if (c1 <= 127)
{
return(result.AppendECI(c1 - 1));
}
return(true);
//currently we only support character set ECIs
/*} else {
* if (bits.available() < 8) {
* throw FormatException.getFormatInstance();
* }
* int c2 = bits.readBits(8);
* if (c1 >= 128 && c1 <= 191) {
* } else {
* if (bits.available() < 8) {
* throw FormatException.getFormatInstance();
* }
* int c3 = bits.readBits(8);
* }
* }*/
}
private static void DecodeByteSegment(BitSource bits, 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);
}
// 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.
var encoding = currentCharacterSetECI == null?GuessEncoding(readBytes) : 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(Encoding.GetEncoding(encoding).GetString(SupportClass.ToByteArray(readBytes)));
}
catch (IOException)
{
throw ReaderException.Instance;
}
byteSegments.Add(SupportClass.ToByteArray(readBytes));
}
/// <summary>
/// See specification GBT 18284-2000
/// </summary>
/// <param name="bits">The bits.</param>
/// <param name="result">The result.</param>
/// <param name="count">The count.</param>
/// <returns></returns>
private static bool decodeHanziSegment(BitSource bits,
StringBuilder result,
int count)
{
// Don't crash trying to read more bits than we have available.
if (count * 13 > bits.available())
{
return(false);
}
// Each character will require 2 bytes. Read the characters as 2-byte pairs
// and decode as GB2312 afterwards
byte[] buffer = new byte[2 * count];
int offset = 0;
while (count > 0)
{
// Each 13 bits encodes a 2-byte character
int twoBytes = bits.readBits(13);
int assembledTwoBytes = ((twoBytes / 0x060) << 8) | (twoBytes % 0x060);
if (assembledTwoBytes < 0x003BF)
{
// In the 0xA1A1 to 0xAAFE range
assembledTwoBytes += 0x0A1A1;
}
else
{
// In the 0xB0A1 to 0xFAFE range
assembledTwoBytes += 0x0A6A1;
}
buffer [offset] = (byte)((assembledTwoBytes >> 8) & 0xFF);
buffer [offset + 1] = (byte)(assembledTwoBytes & 0xFF);
offset += 2;
count--;
}
try {
result.Append(Encoding.GetEncoding(StringUtils.GB2312).GetString(buffer, 0, buffer.Length));
}
#if (WINDOWS_PHONE70 || WINDOWS_PHONE71 || SILVERLIGHT4 || SILVERLIGHT5 || NETFX_CORE || MONOANDROID || MONOTOUCH)
catch (ArgumentException)
{
try
{
// Silverlight only supports a limited number of character sets, trying fallback to UTF-8
result.Append(Encoding.GetEncoding("UTF-8").GetString(buffer, 0, buffer.Length));
}
catch (Exception)
{
return(false);
}
}
#endif
catch (Exception) {
return(false);
}
return(true);
}
/// <summary>
/// See ISO 16022:2006, 5.2.7
/// </summary>
private static bool decodeAnsiX12Segment(BitSource bits,
StringBuilder result)
{
// Three ANSI X12 values are encoded in a 16-bit value as
// (1600 * C1) + (40 * C2) + C3 + 1
int[] cValues = new int[3];
do
{
// If there is only one byte left then it will be encoded as ASCII
if (bits.available() == 8)
{
return(true);
}
int firstByte = bits.readBits(8);
if (firstByte == 254)
{ // Unlatch codeword
return(true);
}
parseTwoBytes(firstByte, bits.readBits(8), cValues);
for (int i = 0; i < 3; i++)
{
int cValue = cValues[i];
if (cValue == 0)
{ // X12 segment terminator <CR>
result.Append('\r');
}
else if (cValue == 1)
{ // X12 segment separator *
result.Append('*');
}
else if (cValue == 2)
{ // X12 sub-element separator >
result.Append('>');
}
else if (cValue == 3)
{ // space
result.Append(' ');
}
else if (cValue < 14)
{ // 0 - 9
result.Append((char)(cValue + 44));
}
else if (cValue < 40)
{ // A - Z
result.Append((char)(cValue + 51));
}
else
{
return(false);
}
}
} while (bits.available() > 0);
return(true);
}
private static bool DecodeByteSegment(BitSource bits,
StringBuilder result,
int count,
CharacterSetECI currentCharacterSetECI,
IList <byte[]> byteSegments)
{
// Don't crash trying to read more bits than we have available.
if (count << 3 > bits.Available())
{
return(false);
}
byte[] readBytes = new byte[count];
for (int i = 0; i < count; i++)
{
readBytes[i] = (byte)bits.ReadBits(8);
}
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 = StringUtils.GuessEncoding(readBytes);
}
else
{
encoding = currentCharacterSetECI.EncodingName;
}
try
{
result.Append(Encoding.GetEncoding(encoding).GetString(readBytes, 0, readBytes.Length));
}
catch (ArgumentException)
{
try
{
// Silverlight only supports a limited number of character sets, trying fallback to UTF-8
result.Append(Encoding.GetEncoding("UTF-8").GetString(readBytes, 0, readBytes.Length));
}
catch (Exception)
{
return(false);
}
}
catch (Exception)
{
return(false);
}
byteSegments.Add(readBytes);
return(true);
}
private static bool decodeNumericSegment(BitSource bits,
StringBuilder result,
int count)
{
// Read three digits at a time
while (count >= 3)
{
// Each 10 bits encodes three digits
if (bits.available() < 10)
{
return(false);
}
int threeDigitsBits = bits.readBits(10);
if (threeDigitsBits >= 1000)
{
return(false);
}
result.Append(toAlphaNumericChar(threeDigitsBits / 100));
result.Append(toAlphaNumericChar((threeDigitsBits / 10) % 10));
result.Append(toAlphaNumericChar(threeDigitsBits % 10));
count -= 3;
}
if (count == 2)
{
// Two digits left over to read, encoded in 7 bits
if (bits.available() < 7)
{
return(false);
}
int twoDigitsBits = bits.readBits(7);
if (twoDigitsBits >= 100)
{
return(false);
}
result.Append(toAlphaNumericChar(twoDigitsBits / 10));
result.Append(toAlphaNumericChar(twoDigitsBits % 10));
}
else if (count == 1)
{
// One digit left over to read
if (bits.available() < 4)
{
return(false);
}
int digitBits = bits.readBits(4);
if (digitBits >= 10)
{
return(false);
}
result.Append(toAlphaNumericChar(digitBits));
}
return(true);
}
private static bool decodeAlphanumericSegment(BitSource bits,
StringBuilder result,
int count,
bool fc1InEffect)
{
// Read two characters at a time
int start = result.Length;
while (count > 1)
{
if (bits.available() < 11)
{
return(false);
}
int nextTwoCharsBits = bits.readBits(11);
result.Append(toAlphaNumericChar(nextTwoCharsBits / 45));
result.Append(toAlphaNumericChar(nextTwoCharsBits % 45));
count -= 2;
}
if (count == 1)
{
// special case: one character left
if (bits.available() < 6)
{
return(false);
}
result.Append(toAlphaNumericChar(bits.readBits(6)));
}
// See section 6.4.8.1, 6.4.8.2
if (fc1InEffect)
{
// We need to massage the result a bit if in an FNC1 mode:
for (int i = start; i < result.Length; i++)
{
if (result [i] == '%')
{
if (i < result.Length - 1 && result [i + 1] == '%')
{
// %% is rendered as %
result.Remove(i + 1, 1);
}
else
{
// In alpha mode, % should be converted to FNC1 separator 0x1D
result.Remove(i, 1);
result.Insert(i, new[] { (char)0x1D });
}
}
}
}
return(true);
}
public static void Decompress <T>(T data, BitSource bits, DeflateOutput <T> output)
{
while (true)
{
using var currentBlock = new DeflateBlock(bits);
if (currentBlock.Type == BlockType.NoCompression)
{
// skip to next byte
bits.SkipToNextByte();
// Read length and nlength?
var length = bits.ReadBitsAsUshort(16);
bits.ConsumeBytes(2);
// copy to output
output.Write(data, length);
bits.ConsumeBytes(length);
}
else
{
while (true)
{
// decode literal/length value from input stream
var value = currentBlock.GetNextValue();
// end of block
if ((value & 0x1FF) == DeflateConstants.EndOfBlock)
{
break;
}
if (value < DeflateConstants.EndOfBlock)
{
//copy value(literal byte) to output stream
output.WriteByte((byte)value);
}
else // value = 257..285
{
currentBlock.GetLengthAndDistance(value, out var length, out var distance);
output.WriteWindow(length, distance);
}
}
}
if (currentBlock.IsFinal)
{
break;
}
}
}
public static DecoderResult decode(sbyte[] bytes)
{
BitSource bits = new BitSource(bytes);
StringBuilder result = new StringBuilder();
StringBuilder resultTrailer = new StringBuilder(0);
System.Collections.ArrayList byteSegments = new System.Collections.ArrayList(1);
int mode = ASCII_ENCODE;
do
{
if (mode == ASCII_ENCODE)
{
mode = decodeAsciiSegment(bits, result, resultTrailer);
}
else
{
switch (mode)
{
case C40_ENCODE:
decodeC40Segment(bits, result);
break;
case TEXT_ENCODE:
decodeTextSegment(bits, result);
break;
case ANSIX12_ENCODE:
decodeAnsiX12Segment(bits, result);
break;
case EDIFACT_ENCODE:
decodeEdifactSegment(bits, result);
break;
case BASE256_ENCODE:
decodeBase256Segment(bits, result, byteSegments);
break;
default:
throw new ReaderException();
}
mode = ASCII_ENCODE;
}
} while (mode != PAD_ENCODE && bits.available() > 0);
if (resultTrailer.Length > 0)
{
result.Append(resultTrailer);
}
return(new DecoderResult(bytes, result.ToString(), int.Equals(byteSegments.Count, 0) ? null : byteSegments));
}
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());
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
//ORIGINAL LINE: static com.google.zxing.common.DecoderResult decode(byte[] bytes) throws com.google.zxing.FormatException
internal static DecoderResult decode(sbyte[] bytes)
{
BitSource bits = new BitSource(bytes);
StringBuilder result = new StringBuilder(100);
StringBuilder resultTrailer = new StringBuilder(0);
IList <sbyte[]> byteSegments = new List <sbyte[]>(1);
Mode mode = Mode.ASCII_ENCODE;
do
{
if (mode == Mode.ASCII_ENCODE)
{
mode = decodeAsciiSegment(bits, result, resultTrailer);
}
else
{
switch (mode)
{
case com.google.zxing.datamatrix.decoder.DecodedBitStreamParser.Mode.C40_ENCODE:
decodeC40Segment(bits, result);
break;
case com.google.zxing.datamatrix.decoder.DecodedBitStreamParser.Mode.TEXT_ENCODE:
decodeTextSegment(bits, result);
break;
case com.google.zxing.datamatrix.decoder.DecodedBitStreamParser.Mode.ANSIX12_ENCODE:
decodeAnsiX12Segment(bits, result);
break;
case com.google.zxing.datamatrix.decoder.DecodedBitStreamParser.Mode.EDIFACT_ENCODE:
decodeEdifactSegment(bits, result);
break;
case com.google.zxing.datamatrix.decoder.DecodedBitStreamParser.Mode.BASE256_ENCODE:
decodeBase256Segment(bits, result, byteSegments);
break;
default:
throw FormatException.FormatInstance;
}
mode = Mode.ASCII_ENCODE;
}
} while (mode != Mode.PAD_ENCODE && bits.available() > 0);
if (resultTrailer.Length > 0)
{
result.Append(resultTrailer.ToString());
}
return(new DecoderResult(bytes, result.ToString(), byteSegments.Count == 0 ? null : byteSegments, null));
}
public ulong ReadCompressedLazyFast(bool canBeLong, ref BitSource source)
{
if ((source.FinishByte() & 1) > 0)
{
return(ReadByte());
}
else if (canBeLong)
{
return((ulong)ReadInt64());
}
else
{
return((ulong)ReadInt32());
}
}
/// <summary>
/// See ISO 16022:2006, 5.2.9 and Annex B, B.2
/// </summary>
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
//ORIGINAL LINE: private static void decodeBase256Segment(com.google.zxing.common.BitSource bits, StringBuilder result, java.util.Collection<byte[]> byteSegments) throws com.google.zxing.FormatException
private static void decodeBase256Segment(BitSource bits, StringBuilder result, ICollection <sbyte[]> byteSegments)
{
// Figure out how long the Base 256 Segment is.
int codewordPosition = 1 + bits.ByteOffset; // position is 1-indexed
int d1 = unrandomize255State(bits.readBits(8), codewordPosition++);
int count;
if (d1 == 0) // Read the remainder of the symbol
{
count = bits.available() / 8;
}
else if (d1 < 250)
{
count = d1;
}
else
{
count = 250 * (d1 - 249) + unrandomize255State(bits.readBits(8), codewordPosition++);
}
// We're seeing NegativeArraySizeException errors from users.
if (count < 0)
{
throw FormatException.FormatInstance;
}
sbyte[] bytes = new sbyte[count];
for (int i = 0; i < count; i++)
{
// Have seen this particular error in the wild, such as at
// http://www.bcgen.com/demo/IDAutomationStreamingDataMatrix.aspx?MODE=3&D=Fred&PFMT=3&PT=F&X=0.3&O=0&LM=0.2
if (bits.available() < 8)
{
throw FormatException.FormatInstance;
}
bytes[i] = (sbyte)unrandomize255State(bits.readBits(8), codewordPosition++);
}
byteSegments.Add(bytes);
try
{
//result.Append(new string(bytes, "ISO8859_1"));
result.Append(GetEncodedStringFromBuffer(bytes, "ISO-8859-1"));
}
catch (System.IO.IOException uee)
{
throw new InvalidOperationException("Platform does not support required encoding: " + uee);
}
}
public ulong ReadCompressed(bool canBeLong, ref BitSource source)
{
if (source.FreeBits == 0)
{
source.MoveToNewByte();
}
if (Settings.LazyCompressedWriting)
{
return(ReadCompressedLazyFast(canBeLong, ref source));
}
else
{
return(ReadCompressedSlow(ref source));
}
}
private static void decodeAlphanumericSegment(BitSource bits, System.Text.StringBuilder result, int count)
{
// Read two characters at a time
while (count > 1)
{
int nextTwoCharsBits = bits.readBits(11);
result.Append(ALPHANUMERIC_CHARS[nextTwoCharsBits / 45]);
result.Append(ALPHANUMERIC_CHARS[nextTwoCharsBits % 45]);
count -= 2;
}
if (count == 1)
{
// special case: one character left
result.Append(ALPHANUMERIC_CHARS[bits.readBits(6)]);
}
}
/// <summary>
/// See specification GBT 18284-2000
/// </summary>
/// <param name="bits">The bits.</param>
/// <param name="result">The result.</param>
/// <param name="count">The count.</param>
/// <returns></returns>
private static bool decodeHanziSegment(BitSource bits,
StringBuilder result,
int count)
{
// Don't crash trying to read more bits than we have available.
if (count * 13 > bits.available())
{
return(false);
}
// Each character will require 2 bytes. Read the characters as 2-byte pairs
// and decode as GB2312 afterwards
byte[] buffer = new byte[2 * count];
int offset = 0;
while (count > 0)
{
// Each 13 bits encodes a 2-byte character
int twoBytes = bits.readBits(13);
int assembledTwoBytes = ((twoBytes / 0x060) << 8) | (twoBytes % 0x060);
if (assembledTwoBytes < 0x003BF)
{
// In the 0xA1A1 to 0xAAFE range
assembledTwoBytes += 0x0A1A1;
}
else
{
// In the 0xB0A1 to 0xFAFE range
assembledTwoBytes += 0x0A6A1;
}
buffer[offset] = (byte)((assembledTwoBytes >> 8) & 0xFF);
buffer[offset + 1] = (byte)(assembledTwoBytes & 0xFF);
offset += 2;
count--;
}
try
{
result.Append(Encoding.GetEncoding(StringUtils.GB2312).GetString(buffer, 0, buffer.Length));
}
catch (Exception)
{
return(false);
}
return(true);
}
private static bool decodeKanjiSegment(BitSource bits,
StringBuilder result,
int count)
{
// Don't crash trying to read more bits than we have available.
if (count * 13 > bits.available())
{
return(false);
}
// Each character will require 2 bytes. Read the characters as 2-byte pairs
// and decode as Shift_JIS afterwards
byte[] buffer = new byte[2 * count];
int offset = 0;
while (count > 0)
{
// Each 13 bits encodes a 2-byte character
int twoBytes = bits.readBits(13);
int assembledTwoBytes = ((twoBytes / 0x0C0) << 8) | (twoBytes % 0x0C0);
if (assembledTwoBytes < 0x01F00)
{
// In the 0x8140 to 0x9FFC range
assembledTwoBytes += 0x08140;
}
else
{
// In the 0xE040 to 0xEBBF range
assembledTwoBytes += 0x0C140;
}
buffer[offset] = (byte)(assembledTwoBytes >> 8);
buffer[offset + 1] = (byte)assembledTwoBytes;
offset += 2;
count--;
}
// Shift_JIS may not be supported in some environments:
var encoding = StringUtils.SHIFT_JIS_ENCODING;
if (encoding == null)
{
encoding = StringUtils.PLATFORM_DEFAULT_ENCODING_T;
}
result.Append(encoding.GetString(buffer, 0, buffer.Length));
return(true);
}
/// <summary>
/// Возвращает очки за текст
/// </summary>
private static int GetPointsForBit(BitSource sourse, PlayerSkills playerSkills)
{
switch (sourse)
{
case BitSource.Free:
return(0);
case BitSource.Self:
return(2 * playerSkills.BitMaking);
case BitSource.Bitmaker:
return(MAX_CATEGORY_POINTS);
default:
throw new ArgumentOutOfRangeException(nameof(sourse), sourse, null);
}
}
private static bool decodeByteSegment(BitSource bits,
StringBuilder result,
int count,
CharacterSetECI currentCharacterSetECI,
IList byteSegments,
Hashtable hints)
{
// Don't crash trying to read more bits than we have available.
if (count << 3 > bits.available())
{
return(false);
}
byte[] readBytes = new byte[count];
for (int i = 0; i < count; i++)
{
readBytes[i] = (byte)bits.readBits(8);
}
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 = StringUtils.guessEncoding(readBytes, hints);
}
else
{
encoding = currentCharacterSetECI.EncodingName;
}
try
{
result.Append(Encoding.UTF8.GetChars(readBytes, 0, readBytes.Length));
}
catch (Exception)
{
return(false);
}
byteSegments.Add(readBytes);
return(true);
}
public ulong ReadCompressedSlow(ref BitSource source)
{
// Process header
byte preHeaderCapacity = source.FreeBits;
(byte noContBytes, byte headerLen) = ReadNoContBytes(ref source);
byte bitsToGo = (byte)(8 * noContBytes);
ulong res = ReadFirstByteData(ref source, headerLen, bitsToGo, preHeaderCapacity);
while (bitsToGo > 0)
{
bitsToGo -= 8;
res |= (ulong)ReadByte() << bitsToGo;
}
return(res);
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
//ORIGINAL LINE: private static void decodeKanjiSegment(com.google.zxing.common.BitSource bits, StringBuilder result, int count) throws com.google.zxing.FormatException
private static void decodeKanjiSegment(BitSource bits, StringBuilder result, int count)
{
// Don't crash trying to read more bits than we have available.
if (count * 13 > bits.available())
{
throw FormatException.FormatInstance;
}
// Each character will require 2 bytes. Read the characters as 2-byte pairs
// and decode as Shift_JIS afterwards
sbyte[] buffer = new sbyte[2 * count];
int offset = 0;
while (count > 0)
{
// Each 13 bits encodes a 2-byte character
int twoBytes = bits.readBits(13);
int assembledTwoBytes = ((twoBytes / 0x0C0) << 8) | (twoBytes % 0x0C0);
if (assembledTwoBytes < 0x01F00)
{
// In the 0x8140 to 0x9FFC range
assembledTwoBytes += 0x08140;
}
else
{
// In the 0xE040 to 0xEBBF range
assembledTwoBytes += 0x0C140;
}
buffer[offset] = (sbyte)(assembledTwoBytes >> 8);
buffer[offset + 1] = (sbyte)assembledTwoBytes;
offset += 2;
count--;
}
// Shift_JIS may not be supported in some environments:
try
{
//result.Append(new string(buffer, StringUtils.SHIFT_JIS));
result.Append(GetEncodedStringFromBuffer(buffer, StringUtils.SHIFT_JIS));
}
catch (System.IO.IOException)
{
throw FormatException.FormatInstance;
}
}
/// <summary>
/// See specification GBT 18284-2000
/// </summary>
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
//ORIGINAL LINE: private static void decodeHanziSegment(com.google.zxing.common.BitSource bits, StringBuilder result, int count) throws com.google.zxing.FormatException
private static void decodeHanziSegment(BitSource bits, StringBuilder result, int count)
{
// Don't crash trying to read more bits than we have available.
if (count * 13 > bits.available())
{
throw FormatException.FormatInstance;
}
// Each character will require 2 bytes. Read the characters as 2-byte pairs
// and decode as GB2312 afterwards
sbyte[] buffer = new sbyte[2 * count];
int offset = 0;
while (count > 0)
{
// Each 13 bits encodes a 2-byte character
int twoBytes = bits.readBits(13);
int assembledTwoBytes = ((twoBytes / 0x060) << 8) | (twoBytes % 0x060);
if (assembledTwoBytes < 0x003BF)
{
// In the 0xA1A1 to 0xAAFE range
assembledTwoBytes += 0x0A1A1;
}
else
{
// In the 0xB0A1 to 0xFAFE range
assembledTwoBytes += 0x0A6A1;
}
buffer[offset] = (sbyte)((assembledTwoBytes >> 8) & 0xFF);
buffer[offset + 1] = (sbyte)(assembledTwoBytes & 0xFF);
offset += 2;
count--;
}
try
{
//result.Append(new string(buffer, StringUtils.GB2312));
result.Append(GetEncodedStringFromBuffer(buffer, StringUtils.GB2312));
}
catch (System.IO.IOException)
{
throw FormatException.FormatInstance;
}
}
private static bool decodeByteSegment(BitSource bits,
StringBuilder result,
int count,
CharacterSetECI currentCharacterSetECI,
IList <byte[]> byteSegments,
IDictionary <DecodeHintType, object> hints)
{
// Don't crash trying to read more bits than we have available.
if (count << 3 > bits.available())
{
return(false);
}
byte[] readBytes = new byte[count];
for (int i = 0; i < count; i++)
{
readBytes[i] = (byte)bits.readBits(8);
}
Encoding 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 = StringUtils.guessCharset(readBytes, hints);
}
else
{
encoding = CharacterSetECI.getEncoding(currentCharacterSetECI.EncodingName);
}
if (encoding == null)
{
encoding = StringUtils.PLATFORM_DEFAULT_ENCODING_T;
}
result.Append(encoding.GetString(readBytes, 0, readBytes.Length));
byteSegments.Add(readBytes);
return(true);
}
public void testSource()
{
byte[] bytes = {1, 2, 3, 4, 5};
BitSource source = new BitSource(bytes);
Assert.AreEqual(40, source.available());
Assert.AreEqual(0, source.readBits(1));
Assert.AreEqual(39, source.available());
Assert.AreEqual(0, source.readBits(6));
Assert.AreEqual(33, source.available());
Assert.AreEqual(1, source.readBits(1));
Assert.AreEqual(32, source.available());
Assert.AreEqual(2, source.readBits(8));
Assert.AreEqual(24, source.available());
Assert.AreEqual(12, source.readBits(10));
Assert.AreEqual(14, source.available());
Assert.AreEqual(16, source.readBits(8));
Assert.AreEqual(6, source.available());
Assert.AreEqual(5, source.readBits(6));
Assert.AreEqual(0, source.available());
}
