internal AtrChecksumToken(AtrReadStream atr)
{
this.CalculatedChecksum = AtrChecksumToken.CalculateChecksum(atr.GetPreviousBytes().GetSubArray(1));
this.CheckByte = atr.GetNextByte();
this.ChecksumValid = this.CheckByte == this.CalculatedChecksum;
}
internal AtrChecksumToken(byte[] atrBytesWithoutChecksum)
{
this.CalculatedChecksum = AtrChecksumToken.CalculateChecksum(atrBytesWithoutChecksum.GetSubArray(1));
this.CheckByte = this.CalculatedChecksum;
this.ChecksumValid = true;
}
internal TokenizedAtr(Atr owner, byte[] atr)
{
this.owner = owner;
AtrReadStream AtrStream = new AtrReadStream(atr);
//Read preamble
this.Preamble = new AtrPreambleToken(this, AtrStream);
//read interface byte groups
this.InterfaceByteGroups = new AtrInterfaceByteGroupTokenCollection(this);
NextInterfaceBytesIndicator NextInterfaceBytesIndicator = this.Preamble.NextInterfaceBytesIndicator;
while (NextInterfaceBytesIndicator != null)
{
AtrInterfaceByteGroupToken InterfaceByteGroup = new AtrInterfaceByteGroupToken(this, AtrStream, NextInterfaceBytesIndicator);
this.InterfaceByteGroups.AppendGroup(InterfaceByteGroup);
NextInterfaceBytesIndicator = NextInterfaceBytesIndicator.TdExists
? new NextInterfaceBytesIndicator(AtrStream.GetNextByte(), false)
: null;
}
//Read and parse historical characters
if (this.Preamble.NumberOfHistoricalCharacters > 0)
{
byte[] HistoricalCharacters = AtrStream.GetNextBytes(this.Preamble.NumberOfHistoricalCharacters);
this.HistoricalCharacters = new AtrHistoricalCharactersToken(this, HistoricalCharacters);
}
else
{
this.HistoricalCharacters = new AtrHistoricalCharactersToken(this, new byte[0]);
}
//Read checksum if needed
if (this.ChecksumRequired)
{
this.atrChecksum = new AtrChecksumToken(AtrStream);
}
//Read additional bytes
int AdditionalBytes = AtrStream.GetRemainingLength();
if (AdditionalBytes > 0)
{
this.ExtraBytes = new AtrExtraBytesToken(AtrStream, AdditionalBytes);
}
}
internal void NotifyChanged()
{
if (this.ChecksumRequired)
{
AtrWriteStream AtrStream = new AtrWriteStream();
AtrStream.WriteBytes(this.Preamble.Bytes);
this.InterfaceByteGroups.ForEach(_ => AtrStream.WriteBytes(_.Bytes));
AtrStream.WriteBytes(this.HistoricalCharacters.Bytes);
this.AtrChecksum = new AtrChecksumToken(AtrStream.ToByteArray());
}
else
{
this.AtrChecksum = null;
}
this.owner.NotifyChanged();
}
