public override int Read(byte[] array, int offset, int count)
{
EnsureDecompressionMode();
ValidateParameters(array, offset, count);
EnsureNotDisposed();
int bytesRead;
int currentOffset = offset;
int remainingCount = count;
while (true)
{
bytesRead = _inflater.Inflate(array, currentOffset, remainingCount);
currentOffset += bytesRead;
remainingCount -= bytesRead;
if (remainingCount == 0)
{
break;
}
if (_inflater.Finished())
{
// if we finished decompressing, we can't have anything left in the outputwindow.
Debug.Assert(_inflater.AvailableOutput == 0, "We should have copied all stuff out!");
break;
}
Debug.Assert(_inflater.NeedsInput(), "We can only run into this case if we are short of input");
int bytes = _stream.Read(_buffer, 0, _buffer.Length);
if (bytes <= 0)
{
break;
}
else if (bytes > _buffer.Length)
{
// The stream is either malicious or poorly implemented and returned a number of
// bytes larger than the buffer supplied to it.
throw new InvalidDataException(SR.GenericInvalidData);
}
_inflater.SetInput(_buffer, 0, bytes);
}
return(count - remainingCount);
}
internal int ReadCore(Span <byte> buffer)
{
EnsureDecompressionMode();
EnsureNotDisposed();
EnsureBufferInitialized();
int totalRead = 0;
while (true)
{
int bytesRead = _inflater.Inflate(buffer.Slice(totalRead));
totalRead += bytesRead;
if (totalRead == buffer.Length)
{
break;
}
// If the stream is finished then we have a few potential cases here:
// 1. DeflateStream => return
// 2. GZipStream that is finished but may have an additional GZipStream appended => feed more input
// 3. GZipStream that is finished and appended with garbage => return
if (_inflater.Finished() && (!_inflater.IsGzipStream() || !_inflater.NeedsInput()))
{
break;
}
if (_inflater.NeedsInput())
{
int bytes = _stream.Read(_buffer, 0, _buffer.Length);
if (bytes <= 0)
{
break;
}
else if (bytes > _buffer.Length)
{
// The stream is either malicious or poorly implemented and returned a number of
// bytes larger than the buffer supplied to it.
throw new InvalidDataException(SR.GenericInvalidData);
}
_inflater.SetInput(_buffer, 0, bytes);
}
}
return(totalRead);
}
public override int Read(byte[] array, int offset, int count)
{
EnsureDecompressionMode();
ValidateParameters(array, offset, count);
EnsureNotDisposed();
int bytesRead;
int currentOffset = offset;
int remainingCount = count;
while (true)
{
bytesRead = _inflater.Inflate(array, currentOffset, remainingCount);
currentOffset += bytesRead;
remainingCount -= bytesRead;
if (remainingCount == 0)
{
break;
}
if (_inflater.Finished())
{
// if we finished decompressing, we can't have anything left in the outputwindow.
Debug.Assert(_inflater.AvailableOutput == 0, "We should have copied all stuff out!");
break;
}
Debug.Assert(_inflater.NeedsInput(), "We can only run into this case if we are short of input");
int bytes = _stream.Read(_buffer, 0, _buffer.Length);
if (bytes == 0)
{
break; //Do we want to throw an exception here?
}
_inflater.SetInput(_buffer, 0, bytes);
}
return(count - remainingCount);
}