/// <summary>
/// Creates a new <see cref="TpsRecord"/> by partially copying the previous one.
/// </summary>
/// <param name="previous">The previous record.</param>
/// <param name="rx">The data to read from.</param>
public TpsRecord(TpsRecord previous, RandomAccess rx)
{
if (previous == null)
{
throw new ArgumentNullException(nameof(previous));
}
if (rx == null)
{
throw new ArgumentNullException(nameof(rx));
}
Flags = rx.Byte();
if ((Flags & 0x80) != 0)
{
RecordLength = rx.ShortLE();
}
else
{
RecordLength = previous.RecordLength;
}
if ((Flags & 0x40) != 0)
{
HeaderLength = rx.ShortLE();
}
else
{
HeaderLength = previous.HeaderLength;
}
int copy = Flags & 0x3F;
var newData = new List <byte>(RecordLength);
newData.AddRange(previous.Data.GetData().Take(copy));
newData.AddRange(rx.ReadBytes(RecordLength - copy));
Data = new RandomAccess(newData.ToArray());
if (Data.Length != RecordLength)
{
throw new ArgumentException("Data and record length mismatch.");
}
BuildHeader();
}
public void ParseRecords()
{
var rx = GetUncompressedData();
Records.Clear();
// Skip pages with non 0x00 flags as they don't seem to contain TpsRecords.
if (Flags == 0x00)
{
rx.PushPosition();
try
{
TpsRecord previousRecord = null;
do
{
TpsRecord currentRecord = null;
if (previousRecord is null)
{
currentRecord = new TpsRecord(rx);
}
else
{
currentRecord = new TpsRecord(previousRecord, rx);
}
Records.Add(currentRecord);
previousRecord = currentRecord;
}while (!rx.IsAtEnd && Records.Count < RecordCount);
}
finally
{
rx.PopPosition();
}
}
}
