/// <inheritdoc />
protected override void HashCore(byte[] array, int ibStart, int cbSize)
{
while (cbSize > 0)
{
if (_currentOffset == _buffer.Length)
{
_blockHashes.Add(VsoHash.HashBlock(_buffer, _buffer.Length));
_currentOffset = 0;
}
int bytesToCopy = Math.Min(cbSize, _buffer.Length - _currentOffset);
Buffer.BlockCopy(array, ibStart, _buffer, _currentOffset, bytesToCopy);
_currentOffset += bytesToCopy;
ibStart += bytesToCopy;
cbSize -= bytesToCopy;
}
}
/// <inheritdoc />
protected override byte[] HashFinal()
{
var rollingId = new VsoHash.RollingBlobIdentifier();
// Flush out buffer
if (_currentOffset != 0)
{
_blockHashes.Add(VsoHash.HashBlock(_buffer, _currentOffset));
}
// if there are no blocks add an empty block
if (_blockHashes.Count == 0)
{
_blockHashes.Add(VsoHash.HashBlock(new byte[] { }, 0));
}
for (int i = 0; i < _blockHashes.Count - 1; i++)
{
rollingId.Update(_blockHashes[i]);
}
return(rollingId.Finalize(_blockHashes[_blockHashes.Count - 1]).Bytes);
}
private BlobBlockHash HashBlock(byte[] block, int lengthToHash)
{
return(VsoHash.HashBlock(block, lengthToHash));
}
