### Class

# Gio BufferedInputStream

#### Description [src]

    class Gio.BufferedInputStream : Gio.FilterInputStream
      implements Gio.Seekable {
      /* No available fields */
    }

Buffered input stream implements `GFilterInputStream` and provides for buffered reads.

By default, `GBufferedInputStream`‘s buffer size is set at 4 kilobytes.

To create a buffered input stream, use `g_buffered_input_stream_new()`, or `g_buffered_input_stream_new_sized()` to specify the buffer’s size at construction.

To get the size of a buffer within a buffered input stream, use `g_buffered_input_stream_get_buffer_size()`. To change the size of a buffered input stream’s buffer, use `g_buffered_input_stream_set_buffer_size()`. Note that the buffer’s size cannot be reduced below the size of the data within the buffer.

#### Hierarchy

#### Ancestors

- GFilterInputStream
- GInputStream
- GObject

#### Descendants

- GDataInputStream

#### Implements

- GSeekable

#### Constructors

###### g_buffered_input_stream_new

Creates a new `GInputStream` from the given `base_stream`, with a buffer set to the default size (4 kilobytes).

###### g_buffered_input_stream_new_sized

Creates a new `GBufferedInputStream` from the given `base_stream`, with a buffer set to `size`.

#### Instance methods

###### g_buffered_input_stream_fill

Tries to read `count` bytes from the stream into the buffer. Will block during this read.

###### g_buffered_input_stream_fill_async

Reads data into `stream`‘s buffer asynchronously, up to `count` size. `io_priority` can be used to prioritize reads. For the synchronous version of this function, see `g_buffered_input_stream_fill()`.

###### g_buffered_input_stream_fill_finish

Finishes an asynchronous read.

###### g_buffered_input_stream_get_available

Gets the size of the available data within the stream.

###### g_buffered_input_stream_get_buffer_size

Gets the size of the input buffer.

###### g_buffered_input_stream_peek

Peeks in the buffered input, copying `count` bytes of data from `offset` bytes in the buffered input into `buffer`.

###### g_buffered_input_stream_peek_buffer

Returns the buffer with the currently available bytes. The returned buffer must not be modified and will become invalid when reading from the stream or filling the buffer.

###### g_buffered_input_stream_read_byte

Tries to read a single byte from the stream or the buffer. Will block during this read.

###### g_buffered_input_stream_set_buffer_size

Sets the size of the internal buffer of `stream` to `size`, or to the size of the contents of the buffer. The buffer can never be resized smaller than its current contents.

##### Methods inherited from GFilterInputStream (3)

###### g_filter_input_stream_get_base_stream

Gets the base stream for the filter stream.

###### g_filter_input_stream_get_close_base_stream

Returns whether the base stream will be closed when `stream` is closed.

###### g_filter_input_stream_set_close_base_stream

Sets whether the base stream will be closed when `stream` is closed.

##### Methods inherited from GInputStream (19)

###### g_input_stream_clear_pending

Clears the pending flag on `stream`.

###### g_input_stream_close

Closes the stream, releasing resources related to it.

###### g_input_stream_close_async

Requests an asynchronous closes of the stream, releasing resources related to it. When the operation is finished `callback` will be called. You can then call `g_input_stream_close_finish()` to get the result of the operation.

###### g_input_stream_close_finish

Finishes closing a stream asynchronously, started from g_input_stream_close_async().

###### g_input_stream_has_pending

Checks if an input stream has pending actions.

###### g_input_stream_is_closed

Checks if an input stream is closed.

###### g_input_stream_read

Tries to read `count` bytes from the stream into the buffer starting at `buffer`. Will block during this read.

###### g_input_stream_read_all

Tries to read `count` bytes from the stream into the buffer starting at `buffer`. Will block during this read.

###### g_input_stream_read_all_async

Request an asynchronous read of `count` bytes from the stream into the buffer starting at `buffer`.

since: 2.44

###### g_input_stream_read_all_finish

Finishes an asynchronous stream read operation started with `g_input_stream_read_all_async()`.

since: 2.44

###### g_input_stream_read_async

Request an asynchronous read of `count` bytes from the stream into the buffer starting at `buffer`. When the operation is finished `callback` will be called. You can then call `g_input_stream_read_finish()` to get the result of the operation.

###### g_input_stream_read_bytes

Like g_input_stream_read(), this tries to read `count` bytes from the stream in a blocking fashion. However, rather than reading into a user-supplied buffer, this will create a new `GBytes` containing the data that was read. This may be easier to use from language bindings.

since: 2.34

###### g_input_stream_read_bytes_async

Request an asynchronous read of `count` bytes from the stream into a new `GBytes`. When the operation is finished `callback` will be called. You can then call `g_input_stream_read_bytes_finish()` to get the result of the operation.

since: 2.34

###### g_input_stream_read_bytes_finish

Finishes an asynchronous stream read-into-`GBytes` operation.

since: 2.34

###### g_input_stream_read_finish

Finishes an asynchronous stream read operation.

###### g_input_stream_set_pending

Sets `stream` to have actions pending. If the pending flag is already set or `stream` is closed, it will return `FALSE` and set `error`.

###### g_input_stream_skip

Tries to skip `count` bytes from the stream. Will block during the operation.

###### g_input_stream_skip_async

Request an asynchronous skip of `count` bytes from the stream. When the operation is finished `callback` will be called. You can then call `g_input_stream_skip_finish()` to get the result of the operation.

###### g_input_stream_skip_finish

Finishes a stream skip operation.

##### Methods inherited from GObject (43)

Please see GObject for a full list of methods.

##### Methods inherited from GSeekable (5)

###### g_seekable_can_seek

Tests if the stream supports the `GSeekableIface`.

###### g_seekable_can_truncate

Tests if the length of the stream can be adjusted with g_seekable_truncate().

###### g_seekable_seek

Seeks in the stream by the given `offset`, modified by `type`.

###### g_seekable_tell

Tells the current position within the stream.

###### g_seekable_truncate

Sets the length of the stream to `offset`. If the stream was previously larger than `offset`, the extra data is discarded. If the stream was previously shorter than `offset`, it is extended with NUL (‘\0’) bytes.

#### Properties

###### Gio.BufferedInputStream:buffer-size

The size of the backend buffer, in bytes.

##### Properties inherited from GFilterInputStream (2)

###### Gio.FilterInputStream:base-stream

The underlying base stream on which the I/O ops will be done.

###### Gio.FilterInputStream:close-base-stream

Whether the base stream should be closed when the filter stream is closed.

#### Signals

##### Signals inherited from GObject (1)

###### GObject::notify

The notify signal is emitted on an object when one of its properties has its value set through g_object_set_property(), g_object_set(), et al.

#### Class structure

    struct GioBufferedInputStreamClass {
      GFilterInputStreamClass parent_class;
      gssize (* fill) (
        GBufferedInputStream* stream,
        gssize count,
        GCancellable* cancellable,
        GError** error
      );
      void (* fill_async) (
        GBufferedInputStream* stream,
        gssize count,
        int io_priority,
        GCancellable* cancellable,
        GAsyncReadyCallback callback,
        gpointer user_data
      );
      gssize (* fill_finish) (
        GBufferedInputStream* stream,
        GAsyncResult* result,
        GError** error
      );
      void (* _g_reserved1) (
    void
      );
      void (* _g_reserved2) (
    void
      );
      void (* _g_reserved3) (
    void
      );
      void (* _g_reserved4) (
    void
      );
      void (* _g_reserved5) (
    void
      );

    }

No description available.

###### Class members

`parent_class: GFilterInputStreamClass`

  No description available.

`fill: gssize (* fill) ( GBufferedInputStream* stream, gssize count, GCancellable* cancellable, GError** error )`

  No description available.

`fill_async: void (* fill_async) ( GBufferedInputStream* stream, gssize count, int io_priority, GCancellable* cancellable, GAsyncReadyCallback callback, gpointer user_data )`

  No description available.

`fill_finish: gssize (* fill_finish) ( GBufferedInputStream* stream, GAsyncResult* result, GError** error )`

  No description available.

`_g_reserved1: void (* _g_reserved1) ( void )`

  No description available.

`_g_reserved2: void (* _g_reserved2) ( void )`

  No description available.

`_g_reserved3: void (* _g_reserved3) ( void )`

  No description available.

`_g_reserved4: void (* _g_reserved4) ( void )`

  No description available.

`_g_reserved5: void (* _g_reserved5) ( void )`

  No description available.

#### Virtual methods

###### Gio.BufferedInputStreamClass.fill

Tries to read `count` bytes from the stream into the buffer. Will block during this read.

###### Gio.BufferedInputStreamClass.fill_async

Reads data into `stream`‘s buffer asynchronously, up to `count` size. `io_priority` can be used to prioritize reads. For the synchronous version of this function, see `g_buffered_input_stream_fill()`.

###### Gio.BufferedInputStreamClass.fill_finish

Finishes an asynchronous read.