public BlockGZipStream(Stream stream, BlockGZipStreamMode mode)
{
if (mode == BlockGZipStreamMode.Compressing)
{
additionalInfo = new CompressedFileAdditionalInfo(1000);
shouldWriteAdditionalInfoOnDisposing = true;
}
else
{
additionalInfo = CompressedFileAdditionalInfo.GetFrom(stream);
}
IsSupportedStream(stream, mode);
this.stream = stream;
}
private void IsSupportedStream(Stream stream, BlockGZipStreamMode mode)
{
if (!stream.CanSeek)
{
throw new NotSupportedException("Stream must support Seek operations.");
}
if (mode == BlockGZipStreamMode.Compressing && !stream.CanWrite)
{
throw new NotSupportedException("Stream stream must support Write operations.");
}
if (mode == BlockGZipStreamMode.Decompressing && !stream.CanRead)
{
throw new NotSupportedException("Stream stream must support Read operations.");
}
}
