/**
 * PANDA 3D SOFTWARE
 * Copyright (c) Carnegie Mellon University.  All rights reserved.
 *
 * All use of this software is subject to the terms of the revised BSD
 * license.  You should have received a copy of this license along
 * with this source code in a file named "LICENSE."
 *
 * @file handleStream.I
 * @author drose
 * @date 2009-06-05
 */

/**
 *
 */
inline HandleStream::
HandleStream() : std::iostream(&_buf) {
}

/**
 *
 */
inline HandleStream::
~HandleStream() {
  close();
}

/**
 * Attempts to open the given handle for input.  The stream may not be
 * simultaneously open for input and output.
 */
inline void HandleStream::
open_read(FHandle handle) {
  clear((std::ios::iostatetate)0);
  _buf.open_read(handle);
  if (!_buf.is_open_read()) {
    clear(std::ios::failbit);
  }
}

/**
 * Attempts to open the given handle for output.  The stream may not be
 * simultaneously open for input and output.
 */
inline void HandleStream::
open_write(FHandle handle) {
  clear((std::ios::iostatetate)0);
  _buf.open_write(handle);
  if (!_buf.is_open_write()) {
    clear(std::ios::failbit);
  }
}

/**
 *
 */
inline void HandleStream::
close() {
  _buf.close();
}

/**
 * Closes the underlying handle, *without* attempting to flush the stream.
 */
inline void HandleStream::
close_handle() {
  _buf.close_handle();
}

/**
 * Returns the handle that was passed to open_read() or open_write().
 */
inline FHandle HandleStream::
get_handle() const {
  return _buf.get_handle();
}

/**
 * Returns true if there is data in the stream's "get" buffer, meaning that at
 * least one character can be extracted from the stream without making an OS
 * read() call.  Returns false if the get buffer is empty, meaning the next
 * read call will hit the OS.
 */
inline bool HandleStream::
has_gdata() const {
  return _buf.has_gdata();
}