/// <summary>
/// Retrieve all byte data containing in this block and associated child data blocks.
/// </summary>
/// <returns>Byte array.</returns>
public byte[] GetAllData()
{
if (Data == null || Data.Length < 1)
{
return(null);
}
if (ChildBlock < 0)
{
return(Data);
}
// get local data
byte[] ret = new byte[Data.Length];
Buffer.BlockCopy(Data, 0, ret, 0, Data.Length);
long currPointer = ChildBlock;
while (true)
{
if (currPointer > 0)
{
byte[] nextBlockBytes = CfsCommon.ReadFromPosition(Filestream, currPointer, BlockSizeBytes);
DataBlock nextBlock = DataBlock.FromBytes(Filestream, BlockSizeBytes, nextBlockBytes, Logging);
if (nextBlock.DataLength < 1 || nextBlock.Data == null || nextBlock.Data.Length < 1)
{
LogDebug("GetAllData reached end of file in data block at position " + currPointer);
break;
}
else
{
LogDebug("GetAllData appending " + nextBlock.DataLength + " bytes of data from data block at position " + currPointer);
byte[] temp = new byte[(ret.Length + nextBlock.DataLength)];
Buffer.BlockCopy(ret, 0, temp, 0, ret.Length);
Buffer.BlockCopy(nextBlock.Data, 0, temp, ret.Length, nextBlock.DataLength);
ret = temp;
// update pointer
currPointer = nextBlock.ChildBlock;
}
}
else
{
LogDebug("GetAllData no child block specified, exiting with " + ret.Length + " bytes of data");
break;
}
}
return(ret);
}
/// <summary>
/// Retrieve data from the specified range.
/// </summary>
/// <param name="startPosition">The starting position from which to read.</param>
/// <param name="count">The number of bytes to read.</param>
/// <returns>Byte data for the requested range.</returns>
public byte[] GetData(long startPosition, long count)
{
if (CfsCommon.IsTrue(IsDirectory))
{
throw new InvalidOperationException("Get data must only be called on file metadata blocks");
}
if (Data == null || Data.Length < 1)
{
return(null);
}
byte[] localData = new byte[LocalDataLength];
Buffer.BlockCopy(Data, 0, localData, 0, LocalDataLength);
if (ChildDataBlock > 0)
{
// get child data
byte[] nextBytes = CfsCommon.ReadFromPosition(Filestream, ChildDataBlock, 64);
DataBlock nextBlock = DataBlock.FromBytes(Filestream, BlockSizeBytes, nextBytes, Logging);
nextBlock.Filestream = Filestream;
byte[] childData = nextBlock.GetAllData();
// join
if (childData != null)
{
byte[] ret = new byte[(localData.Length + childData.Length)];
Buffer.BlockCopy(localData, 0, ret, 0, localData.Length);
Buffer.BlockCopy(childData, 0, ret, localData.Length, childData.Length);
return(ret);
}
else
{
return(localData);
}
}
else
{
return(localData);
}
}