internal SftpContextStream(SftpSession session, string path, FileMode mode, FileAccess access,
SftpFileAttributes attributes)
{
Flags flags = Flags.None;
switch (access)
{
case FileAccess.Read:
flags = Flags.Read;
break;
case FileAccess.Write:
flags = Flags.Write;
break;
case FileAccess.ReadWrite:
flags = Flags.Read | Flags.Write;
break;
}
switch (mode)
{
case FileMode.Append:
flags |= Flags.Append;
break;
case FileMode.Create:
if (attributes == null)
{
flags |= Flags.CreateNew;
}
else
{
flags |= Flags.Truncate;
}
break;
case FileMode.CreateNew:
flags |= Flags.CreateNew;
break;
case FileMode.Open:
break;
case FileMode.OpenOrCreate:
flags |= Flags.CreateNewOrOpen;
break;
case FileMode.Truncate:
flags |= Flags.Truncate;
break;
}
_session = session;
_handle = _session.RequestOpen(path, flags);
_attributes = attributes ?? _session.RequestFStat(_handle);
if (access.HasFlag(FileAccess.Write))
{
_writeBuffer = new byte[WRITE_BUFFER_SIZE];
_writeMode = true;
}
_position = mode != FileMode.Append ? 0 : _attributes.Size;
}
