async Task Write(byte[] buffer, int offset, int count, bool async, CancellationToken cancellationToken = default)
{
if (buffer == null)
{
throw new ArgumentNullException(nameof(buffer));
}
if (offset < 0)
{
throw new ArgumentOutOfRangeException(nameof(offset));
}
if (count < 0)
{
throw new ArgumentOutOfRangeException(nameof(count));
}
if (buffer.Length - offset < count)
{
throw new ArgumentException("Invalid offset or count for this buffer");
}
CheckDisposed();
if (!_writeable)
{
throw new NotSupportedException("Write cannot be called on a stream opened with no write permissions");
}
var totalWritten = 0;
while (totalWritten < count)
{
var chunkSize = Math.Min(count - totalWritten, _manager.MaxTransferBlockSize);
var bytesWritten = await _manager.ExecuteFunction <int>("lowrite", async, cancellationToken, _fd, new ArraySegment <byte>(buffer, offset + totalWritten, chunkSize));
totalWritten += bytesWritten;
if (bytesWritten != chunkSize)
{
throw new InvalidOperationException($"Internal Npgsql bug, please report");
}
_pos += bytesWritten;
}
}