private void CheckEnd(int capacity)
{
var item = _data.Last();
if (item.Format == EncoderFormat.AsciiLower || item.Format == EncoderFormat.Byte)
{
return;
}
if (item.Format == EncoderFormat.EDIFACT)
{
var tmp = item.Data.TrimEnd(SWITCHASCII);
var remaining = (tmp.Length) % 4;
if (remaining == 1 || remaining == 2)
{
_data.Add(new DataItem(EncoderFormat.AsciiLower, tmp.Substring(tmp.Length - remaining)));
item.Data = tmp.Remove(tmp.Length - remaining);
_currentFormat = EncoderFormat.AsciiLower;
}
else if (remaining == 0)
{
item.Data = tmp;
}
return;
}
//handle C40 end rules
}
/// <summary>
/// Compacts 3 bytes into 2.
/// </summary>
/// <param name="stream">stream to compact from</param>
private void Compact(System.IO.MemoryStream stream)
{
stream.Seek(0, System.IO.SeekOrigin.Begin);
int tmp = 0;
while (stream.Position + 3 < stream.Length)
{
tmp = (tmp * 40) + stream.ReadByte();
if (stream.Position > 1 && stream.Position % 3 == 1)
{
tmp++;
_Stream.WriteByte((byte)(tmp / 256));
_Stream.WriteByte((byte)(tmp % 256));
tmp = 0;
}
}
if (stream.Position != stream.Length)
{
_Format = EncoderFormat.AsciiLower;
_Stream.WriteByte((byte)SWITCHASCII);
_Index -= (int)(stream.Length - stream.Position - 1);
}
else if (CanRead())
{
_Stream.WriteByte((byte)SWITCHASCII);
}
}
public void Write(string value, EncoderFormat format)
{
if (format == EncoderFormat.Auto)
{
format = EncoderFormat.AsciiLower;
}
_data.Add(new DataItem(format, value));
}
/// <summary>
/// Encodes 3 bytes into 2 bytes. Used by C40 and TEXT
/// </summary>
/// <param name="format">format to use</param>
private void DoubleByteEncoder(EncoderFormat format)
{
MemoryStream buffer = new MemoryStream();
while (CanRead() && !IsFormatSwitch(Current))
{
CharToInt(Current, buffer, format);
_Index++;
}
Compact(buffer);
}
/// <summary>
/// Encodes a value using the selcted format.
/// </summary>
/// <param name="value">string value to encode</param>
/// <param name="format">encoding format to use</param>
/// <returns>encoded data as a byte array</returns>
public byte[] Encode(string value, EncoderFormat format)
{
_stream = new MemoryStream();
_valueToEncode = value;
_currentIndex = 0;
_currentFormat = format;
if (format == EncoderFormat.Auto)
{
_currentFormat = EncoderFormat.AsciiLower;
}
while (_currentIndex < _valueToEncode.Length)
{
switch (_currentFormat)
{
case EncoderFormat.Auto:
case EncoderFormat.AsciiLower:
case EncoderFormat.AsciiExtended:
AsciiEncode();
break;
case EncoderFormat.AsciiNumber:
break;
case EncoderFormat.C40:
C40Encoder();
break;
case EncoderFormat.TEXT:
TEXTEncoder();
break;
case EncoderFormat.X12:
AnsiX12();
break;
case EncoderFormat.EDIFACT:
EdifactEncoder();
break;
case EncoderFormat.Byte:
ByteEncoder(Encoding.ASCII.GetBytes(_valueToEncode.Substring(_currentIndex)));
break;
default:
break;
}
}
return(_stream.ToArray());
}
/// <summary>
/// Encodes using EDIFACT rules
/// </summary>
private void EdifactEncoder()
{
MemoryStream buffer = new MemoryStream();
while (CanRead() && !IsFormatSwitch(Current))
{
if (Current >= 64 && Current <= 94)
{
buffer.WriteByte((byte)(Current - 64));
}
else if (Current >= 32 && Current <= 63)
{
buffer.WriteByte((byte)Current);
}
else
{
buffer.WriteByte(31);
_Format = EncoderFormat.AsciiLower;
break;
}
}
while (buffer.Length % 4 != 0)
{
buffer.WriteByte(0);
}
_Stream.WriteByte((byte)SWITCHEDIFACT);
buffer.Seek(0, SeekOrigin.Begin);
int tmp = 0;
while (buffer.Position + 4 < buffer.Length)
{
tmp = (tmp * 64) + buffer.ReadByte();
if (buffer.Position > 1 && buffer.Position % 4 == 1)
{
_Stream.WriteByte((byte)(tmp / 65536));
_Stream.WriteByte((byte)((tmp % 65536) / 256));
_Stream.WriteByte((byte)(tmp % 256));
tmp = 0;
}
}
}
private void SwitchFormat(DataItem item)
{
if (_currentFormat == item.Format)
{
return;
}
if (_currentFormat == EncoderFormat.AsciiLower)
{
switch (item.Format)
{
case EncoderFormat.C40:
_output.WriteInt(SWITCHC40);
break;
case EncoderFormat.TEXT:
_output.WriteInt(SWITCHTEXT);
break;
case EncoderFormat.X12:
_output.WriteInt(SWITCHX12);
break;
case EncoderFormat.EDIFACT:
_output.WriteInt(SWITCHEDIFACT);
break;
case EncoderFormat.Byte:
_currentFormat = EncoderFormat.AsciiLower;
break;
default:
throw new BarcodeException("Unknown or unsupported encoding format");
}
return;
}
if (item.Data.Last() != SWITCHASCII)
{
item.Data += SWITCHASCII;
}
_currentFormat = EncoderFormat.AsciiLower;
SwitchFormat(item);
}
public byte[] ToArray(int capacity)
{
_currentFormat = EncoderFormat.AsciiLower;
_output = new MemoryStream();
for (int i = 0; i < _data.Count; i++)
{
var item = _data[i];
SwitchFormat(item);
if (i + 1 == _data.Count)
{
CheckEnd(capacity);
}
switch (item.Format)
{
case EncoderFormat.AsciiLower:
ParseAscii(item.Data);
break;
case EncoderFormat.C40:
case EncoderFormat.TEXT:
case EncoderFormat.X12:
ParseC40(item.Data);
break;
case EncoderFormat.EDIFACT:
ParseEdifact(item.Data);
break;
case EncoderFormat.Byte:
ParseBinary(item.BinaryData);
break;
}
}
if (capacity > -1 && _output.Length > capacity)
{
throw new BarcodeException("Data exceeds barcode capacity");
}
return(_output.ToArray());
}
/// <summary>
/// Encodes using ANSI X12 rules
/// </summary>
private void AnsiX12()
{
_Stream.WriteByte((byte)SWITCHX12);
System.IO.MemoryStream ms = new System.IO.MemoryStream();
while (CanRead() && !IsFormatSwitch(Current))
{
if (Current == 13)
{
ms.WriteByte(0);
}
else if (Current == 42)
{
ms.WriteByte(1);
}
else if (Current == 62)
{
ms.WriteByte(2);
}
else if (Current == 32)
{
ms.WriteByte(3);
}
else if (Current >= 48 && Current <= 57)
{
ms.WriteByte((byte)(Current - 44));
}
else if (Current >= 65 && Current <= 90)
{
ms.WriteByte((byte)(Current - 51));
}
else
{
_Format = EncoderFormat.AsciiLower;
break;
}
_Index++;
}
Compact(ms);
}
/// <summary>
/// Checks the supplied value to see if a switch in encoding rules is needed
/// </summary>
/// <param name="value">value to check</param>
/// <returns>true if a switch is needed. the target format is set as the current format</returns>
private bool IsFormatSwitch(int value)
{
if (_currentFormat != EncoderFormat.AsciiLower && value == SWITCHASCII)
{
_currentFormat = EncoderFormat.AsciiLower;
return(true);
}
switch (value)
{
case SWITCHASCII:
_currentFormat = EncoderFormat.AsciiLower;
return(true);
case SWITCHBYTE:
_currentFormat = EncoderFormat.Byte;
return(true);
case SWITCHC40:
_currentFormat = EncoderFormat.C40;
return(true);
case SWITCHEDIFACT:
_currentFormat = EncoderFormat.EDIFACT;
return(true);
case SWITCHTEXT:
_currentFormat = EncoderFormat.TEXT;
return(true);
case SWITCHX12:
_currentFormat = EncoderFormat.X12;
return(true);
default:
return(false);
}
}
public DataItem(EncoderFormat format, byte[] data)
{
Format = format;
BinaryData = data;
Data = null;
}
/// <summary>
/// Checks the supplied value to see if a switch in encoding rules is needed
/// </summary>
/// <param name="value">value to check</param>
/// <returns>true if a switch is needed. the target format is set as the current format</returns>
private bool IsFormatSwitch(int value)
{
if (_Format != EncoderFormat.AsciiLower && value == SWITCHASCII)
{
_Format = EncoderFormat.AsciiLower;
return true;
}
switch (value)
{
case SWITCHASCII:
return true;
case SWITCHBYTE:
_Format = EncoderFormat.Byte;
return true;
case SWITCHC40:
_Format = EncoderFormat.C40;
return true;
case SWITCHEDIFACT:
_Format = EncoderFormat.EDIFACT;
return true;
case SWITCHTEXT:
_Format = EncoderFormat.TEXT;
return true;
case SWITCHX12:
_Format = EncoderFormat.X12;
return true;
default:
return false;
}
}
/// <summary>
/// Encodes using EDIFACT rules
/// </summary>
private void EdifactEncoder()
{
MemoryStream buffer = new MemoryStream();
while (CanRead() && !IsFormatSwitch(Current))
{
if (Current >= 64 && Current <= 94)
buffer.WriteByte((byte)(Current - 64));
else if (Current >= 32 && Current <= 63)
buffer.WriteByte((byte)Current);
else
{
buffer.WriteByte(31);
_Format = EncoderFormat.AsciiLower;
break;
}
}
while (buffer.Length % 4 != 0)
{
buffer.WriteByte(0);
}
_Stream.WriteByte((byte)SWITCHEDIFACT);
buffer.Seek(0, SeekOrigin.Begin);
int tmp = 0;
while (buffer.Position + 4 < buffer.Length)
{
tmp = (tmp * 64) + buffer.ReadByte();
if (buffer.Position > 1 && buffer.Position % 4 == 1)
{
_Stream.WriteByte((byte)(tmp / 65536));
_Stream.WriteByte((byte)((tmp % 65536) / 256));
_Stream.WriteByte((byte)(tmp % 256));
tmp = 0;
}
}
}
/// <summary>
/// Encodes 3 bytes into 2 bytes. Used by C40 and TEXT
/// </summary>
/// <param name="format">format to use</param>
private void DoubleByteEncoder(EncoderFormat format)
{
MemoryStream buffer = new MemoryStream();
while (CanRead() && !IsFormatSwitch(Current))
{
CharToInt(Current, buffer, format);
_Index++;
}
Compact(buffer);
}
/// <summary>
/// Compacts 3 bytes into 2.
/// </summary>
/// <param name="stream">stream to compact from</param>
private void Compact(System.IO.MemoryStream stream)
{
stream.Seek(0, System.IO.SeekOrigin.Begin);
int tmp = 0;
while (stream.Position + 3 < stream.Length)
{
tmp = (tmp * 40) + stream.ReadByte();
if (stream.Position > 1 && stream.Position % 3 == 1)
{
tmp++;
_Stream.WriteByte((byte)(tmp / 256));
_Stream.WriteByte((byte)(tmp % 256));
tmp = 0;
}
}
if (stream.Position != stream.Length)
{
_Format = EncoderFormat.AsciiLower;
_Stream.WriteByte((byte)SWITCHASCII);
_Index -= (int)(stream.Length - stream.Position - 1);
}
else if (CanRead())
_Stream.WriteByte((byte)SWITCHASCII);
}
/// <summary>
/// Encodes the char using the specified format and writes the result to the stream
/// </summary>
/// <param name="value">value to encode</param>
/// <param name="stream">stream to write to</param>
/// <param name="format">Encoding format</param>
private void CharToInt(char value, System.IO.MemoryStream stream, EncoderFormat format)
{
//Extended ASCII
if (value > 127)
{
stream.WriteByte(1);
stream.WriteByte(30);
value = (char)(value - 128);
}
if (value == 32)
{
stream.WriteByte(3);
return;
}
if (value >= 48 && value <= 57)
{
stream.WriteByte((byte)(value - 44));
return;
}
//Shift set 1
if (value >= 0 && value <= 31)
{
stream.WriteByte(0);
stream.WriteByte((byte)value);
return;
}
//Shift set 2
if (value >= 33 && value <= 47)
{
stream.WriteByte(1);
stream.WriteByte((byte)(value - 33));
return;
}
if (value >= 58 && value <= 64)
{
stream.WriteByte(1);
stream.WriteByte((byte)(value - 58 + 15));
return;
}
if (value >= 91 && value <= 95)
{
stream.WriteByte(1);
stream.WriteByte((byte)(value - 91 + 22));
return;
}
if (format == EncoderFormat.C40)
{
//Shift 3
if (value >= 96 && value <= 127)
{
stream.WriteByte(2);
stream.WriteByte((byte)(value - 96));
return;
}
}
if (format == EncoderFormat.TEXT)
{
//Shift 3
if (value == 96)
{
stream.WriteByte(2);
stream.WriteByte((byte)(value - 96));
return;
}
if (value >= 65 && value <= 90)
{
stream.WriteByte(2);
stream.WriteByte((byte)(value - 65 + 1));
return;
}
if (value >= 123 && value <= 127)
{
stream.WriteByte(2);
stream.WriteByte((byte)(value - 123 + 27));
return;
}
}
}
/// <summary>
/// Encodes using ANSI X12 rules
/// </summary>
private void AnsiX12()
{
_Stream.WriteByte((byte)SWITCHX12);
System.IO.MemoryStream ms = new System.IO.MemoryStream();
while (CanRead() && !IsFormatSwitch(Current))
{
if (Current == 13)
ms.WriteByte(0);
else if (Current == 42)
ms.WriteByte(1);
else if (Current == 62)
ms.WriteByte(2);
else if (Current == 32)
ms.WriteByte(3);
else if (Current >= 48 && Current <= 57)
ms.WriteByte((byte)(Current - 44));
else if (Current >= 65 && Current <= 90)
ms.WriteByte((byte)(Current - 51));
else
{
_Format = EncoderFormat.AsciiLower;
break;
}
_Index++;
}
Compact(ms);
}
public DataItem(EncoderFormat format, string data)
{
Format = format;
Data = data;
BinaryData = null;
}
/// <summary>
/// Encodes the char using the specified format and writes the result to the stream
/// </summary>
/// <param name="value">value to encode</param>
/// <param name="stream">stream to write to</param>
/// <param name="format">Encoding format</param>
private void CharToInt(char value, System.IO.MemoryStream stream, EncoderFormat format)
{
//Extended ASCII
if (value > 127)
{
stream.WriteByte(1);
stream.WriteByte(30);
value = (char)(value - 128);
}
if (value == 32)
{
stream.WriteByte(3);
return;
}
if (value >= 48 && value <= 57)
{
stream.WriteByte((byte)(value - 44));
return;
}
//Shift set 1
if (value >= 0 && value <= 31)
{
stream.WriteByte(0);
stream.WriteByte((byte)value);
return;
}
//Shift set 2
if (value >= 33 && value <= 47)
{
stream.WriteByte(1);
stream.WriteByte((byte)(value - 33));
return;
}
if (value >= 58 && value <= 64)
{
stream.WriteByte(1);
stream.WriteByte((byte)(value - 58 + 15));
return;
}
if (value >= 91 && value <= 95)
{
stream.WriteByte(1);
stream.WriteByte((byte)(value - 91 + 22));
return;
}
if (format == EncoderFormat.C40)
{
//Shift 3
if (value >= 96 && value <= 127)
{
stream.WriteByte(2);
stream.WriteByte((byte)(value - 96));
return;
}
}
if (format == EncoderFormat.TEXT)
{
//Shift 3
if (value == 96)
{
stream.WriteByte(2);
stream.WriteByte((byte)(value - 96));
return;
}
if (value >= 65 && value <= 90)
{
stream.WriteByte(2);
stream.WriteByte((byte)(value - 65 + 1));
return;
}
if (value >= 123 && value <= 127)
{
stream.WriteByte(2);
stream.WriteByte((byte)(value - 123 + 27));
return;
}
}
}
public DataItem(EncoderFormat format, byte[] data)
{
Format = format;
BinaryData = data;
Data = null;
}
public DataItem(EncoderFormat format, string data)
{
Format = format;
Data = data;
BinaryData = null;
}
private void CheckEnd(int capacity)
{
var item = _data.Last();
if (item.Format == EncoderFormat.AsciiLower || item.Format == EncoderFormat.Byte)
return;
if (item.Format == EncoderFormat.EDIFACT)
{
var tmp = item.Data.TrimEnd(SWITCHASCII);
var remaining = (tmp.Length) % 4;
if (remaining == 1 || remaining == 2)
{
_data.Add(new DataItem(EncoderFormat.AsciiLower, tmp.Substring(tmp.Length - remaining)));
item.Data = tmp.Remove(tmp.Length - remaining);
_currentFormat = EncoderFormat.AsciiLower;
}
else if (remaining == 0)
item.Data = tmp;
return;
}
//handle C40 end rules
}
public void Write(string value, EncoderFormat format)
{
if (format == EncoderFormat.Auto)
format = EncoderFormat.AsciiLower;
_data.Add(new DataItem(format, value));
}
/// <summary>
/// Encodes a value using the selcted format.
/// </summary>
/// <param name="value">string value to encode</param>
/// <param name="format">encoding format to use</param>
/// <returns>encoded data as a byte array</returns>
public byte[] Encode(string value, EncoderFormat format)
{
_Stream = new MemoryStream();
_Value = value;
_Index = 0;
if (format == EncoderFormat.Auto)
_Format = EncoderFormat.AsciiLower;
while (_Index < _Value.Length)
{
switch (_Format)
{
case EncoderFormat.Auto:
case EncoderFormat.AsciiLower:
case EncoderFormat.AsciiExtended:
AsciiEncode();
break;
case EncoderFormat.AsciiNumber:
break;
case EncoderFormat.C40:
C40Encoder();
break;
case EncoderFormat.TEXT:
TEXTEncoder();
break;
case EncoderFormat.X12:
AnsiX12();
break;
case EncoderFormat.EDIFACT:
EdifactEncoder();
break;
case EncoderFormat.Byte:
ByteEncoder(Encoding.ASCII.GetBytes(_Value.Substring(_Index)));
break;
default:
break;
}
}
return _Stream.ToArray();
}
public byte[] ToArray(int capacity)
{
_currentFormat = EncoderFormat.AsciiLower;
_output = new MemoryStream();
for (int i = 0; i < _data.Count; i++)
{
var item = _data[i];
SwitchFormat(item);
if (i + 1 == _data.Count)
CheckEnd(capacity);
switch (item.Format)
{
case EncoderFormat.AsciiLower:
ParseAscii(item.Data);
break;
case EncoderFormat.C40:
case EncoderFormat.TEXT:
case EncoderFormat.X12:
ParseC40(item.Data);
break;
case EncoderFormat.EDIFACT:
ParseEdifact(item.Data);
break;
case EncoderFormat.Byte:
ParseBinary(item.BinaryData);
break;
}
}
if (capacity > -1 && _output.Length > capacity)
throw new BarcodeException("Data exceeds barcode capacity");
return _output.ToArray();
}
private void SwitchFormat(DataItem item)
{
if (_currentFormat == item.Format)
return;
if (_currentFormat == EncoderFormat.AsciiLower)
{
switch (item.Format)
{
case EncoderFormat.C40:
_output.WriteInt(SWITCHC40);
break;
case EncoderFormat.TEXT:
_output.WriteInt(SWITCHTEXT);
break;
case EncoderFormat.X12:
_output.WriteInt(SWITCHX12);
break;
case EncoderFormat.EDIFACT:
_output.WriteInt(SWITCHEDIFACT);
break;
case EncoderFormat.Byte:
_currentFormat = EncoderFormat.AsciiLower;
break;
default:
throw new BarcodeException("Unknown or unsupported encoding format");
}
return;
}
if (item.Data.Last() != SWITCHASCII)
item.Data += SWITCHASCII;
_currentFormat = EncoderFormat.AsciiLower;
SwitchFormat(item);
}
