public bool Read()
{
_TlvRecord = null;
try
{
int type = _Stream.ReadByte();
if (type == -1)
throw new EndOfStreamException();
TTlvTypeIdentifier typeIdentifier;
ushort identifier;
uint length;
byte[] value = null;
if ((type & TlvConstant.RESOURCE_WITH_VALUE) == TlvConstant.RESOURCE_WITH_VALUE)
typeIdentifier = TTlvTypeIdentifier.ResourceWithValue;
else if ((type & TlvConstant.MULTIPLE_RESOURCES) == TlvConstant.MULTIPLE_RESOURCES)
typeIdentifier = TTlvTypeIdentifier.MultipleResources;
else if ((type & TlvConstant.RESOURCE_INSTANCE) == TlvConstant.RESOURCE_INSTANCE)
typeIdentifier = TTlvTypeIdentifier.ResourceInstance;
else
typeIdentifier = TTlvTypeIdentifier.ObjectInstance;
bool identifier16Bits = ((type & TlvConstant.IDENTIFIER_16BITS) == TlvConstant.IDENTIFIER_16BITS);
if (identifier16Bits)
{
identifier = NetworkByteOrderConverter.ToUInt16(_Stream);
}
else
{
int readByte = _Stream.ReadByte();
if (readByte == -1)
throw new EndOfStreamException();
identifier = (ushort)readByte;
}
if ((type & TlvConstant.LENGTH_24BIT) == TlvConstant.LENGTH_24BIT)
{
length = NetworkByteOrderConverter.ToUInt24(_Stream); ;
}
else if ((type & TlvConstant.LENGTH_16BIT) == TlvConstant.LENGTH_16BIT)
{
length = NetworkByteOrderConverter.ToUInt16(_Stream);
}
else if ((type & TlvConstant.LENGTH_8BIT) == TlvConstant.LENGTH_8BIT)
{
int readByte = _Stream.ReadByte();
if (readByte == -1)
throw new EndOfStreamException();
length = (uint)readByte;
}
else //3Bit length
{
length = (uint)(type & 0x7);
}
value = new byte[length];
int read = _Stream.Read(value, 0, (int)length);
if (read != (int)length)
throw new EndOfStreamException();
_TlvRecord = new TlvRecord() { TypeIdentifier = typeIdentifier, Identifier = identifier, Length = length, Value = value };
}
catch (EndOfStreamException)
{
}
return _TlvRecord != null;
}
public bool Read()
{
_TlvRecord = null;
try
{
int type = _Stream.ReadByte();
if (type == -1)
{
throw new EndOfStreamException();
}
TTlvTypeIdentifier typeIdentifier;
ushort identifier;
uint length;
byte[] value = null;
if ((type & TlvConstant.RESOURCE_WITH_VALUE) == TlvConstant.RESOURCE_WITH_VALUE)
{
typeIdentifier = TTlvTypeIdentifier.ResourceWithValue;
}
else if ((type & TlvConstant.MULTIPLE_RESOURCES) == TlvConstant.MULTIPLE_RESOURCES)
{
typeIdentifier = TTlvTypeIdentifier.MultipleResources;
}
else if ((type & TlvConstant.RESOURCE_INSTANCE) == TlvConstant.RESOURCE_INSTANCE)
{
typeIdentifier = TTlvTypeIdentifier.ResourceInstance;
}
else
{
typeIdentifier = TTlvTypeIdentifier.ObjectInstance;
}
bool identifier16Bits = ((type & TlvConstant.IDENTIFIER_16BITS) == TlvConstant.IDENTIFIER_16BITS);
if (identifier16Bits)
{
identifier = NetworkByteOrderConverter.ToUInt16(_Stream);
}
else
{
int readByte = _Stream.ReadByte();
if (readByte == -1)
{
throw new EndOfStreamException();
}
identifier = (ushort)readByte;
}
if ((type & TlvConstant.LENGTH_24BIT) == TlvConstant.LENGTH_24BIT)
{
length = NetworkByteOrderConverter.ToUInt24(_Stream);;
}
else if ((type & TlvConstant.LENGTH_16BIT) == TlvConstant.LENGTH_16BIT)
{
length = NetworkByteOrderConverter.ToUInt16(_Stream);
}
else if ((type & TlvConstant.LENGTH_8BIT) == TlvConstant.LENGTH_8BIT)
{
int readByte = _Stream.ReadByte();
if (readByte == -1)
{
throw new EndOfStreamException();
}
length = (uint)readByte;
}
else //3Bit length
{
length = (uint)(type & 0x7);
}
value = new byte[length];
int read = _Stream.Read(value, 0, (int)length);
if (read != (int)length)
{
throw new EndOfStreamException();
}
_TlvRecord = new TlvRecord()
{
TypeIdentifier = typeIdentifier, Identifier = identifier, Length = length, Value = value
};
}
catch (EndOfStreamException)
{
}
return(_TlvRecord != null);
}