:right-sidebar: True

MemoryOutputStream
===================================================================

.. currentmodule:: gi.repository.Gio





.. class:: MemoryOutputStream(**properties: ~typing.Any)
   :no-contents-entry:


Superclasses: :class:`~gi.repository.Gio.OutputStream`, :class:`~gi.repository.GObject.Object`



Implemented Interfaces: :class:`~gi.repository.Gio.PollableOutputStream`, :class:`~gi.repository.Gio.Seekable`



``GMemoryOutputStream`` is a class for using arbitrary
memory chunks as output for GIO streaming output operations.

As of GLib 2.34, ``GMemoryOutputStream`` trivially implements
:obj:`~gi.repository.Gio.PollableOutputStream`\: it always polls as ready.


Constructors
------------

.. rst-class:: interim-class

.. class:: MemoryOutputStream
   :no-index:


   .. classmethod:: new_resizable() -> ~gi.repository.Gio.OutputStream

      Creates a new :obj:`~gi.repository.Gio.MemoryOutputStream`\, using :func:`~gi.repository.GLib.realloc` and :func:`~gi.repository.GLib.free`
      for memory allocation.


      .. versionadded:: 2.36












Methods
-------

.. rst-class:: interim-class

.. class:: MemoryOutputStream
   :no-index:


   .. method:: get_data() -> ~typing.Any | None

      Gets any loaded data from the ``ostream``\.

      Note that the returned pointer may become invalid on the next
      write or truncate operation on the stream.









   .. method:: get_data_size() -> int

      Returns the number of bytes from the start up to including the last
      byte written in the stream that has not been truncated away.


      .. versionadded:: 2.18








   .. method:: get_size() -> int

      Gets the size of the currently allocated data area (available from
      :func:`~gi.repository.Gio.MemoryOutputStream.get_data`).

      You probably don't want to use this function on resizable streams.
      See :func:`~gi.repository.Gio.MemoryOutputStream.get_data_size` instead.  For resizable
      streams the size returned by this function is an implementation
      detail and may be change at any time in response to operations on the
      stream.

      If the stream is fixed-sized (ie: no realloc was passed to
      :func:`~gi.repository.Gio.MemoryOutputStream.new`) then this is the maximum size of the
      stream and further writes will return :const:`~gi.repository.Gio.IOErrorEnum.NO_SPACE`.

      In any case, if you want the number of bytes currently written to the
      stream, use :func:`~gi.repository.Gio.MemoryOutputStream.get_data_size`.













Properties
----------

.. rst-class:: interim-class

.. class:: MemoryOutputStream
   :no-index:
   

   .. attribute:: props.data
      :type: ~typing.Any

      The type of the None singleton.



      .. versionadded:: 2.24





   .. attribute:: props.data_size
      :type: int

      The type of the None singleton.



      .. versionadded:: 2.24





   .. attribute:: props.size
      :type: int

      The type of the None singleton.



      .. versionadded:: 2.24













Fields
------

.. rst-class:: interim-class

.. class:: MemoryOutputStream
   :no-index:
   

   .. attribute:: parent_instance

      






   .. attribute:: priv