glib/gio/gbufferedinputstream.h

/* GIO - GLib Input, Output and Streaming Library
 * 
 * Copyright (C) 2006-2007 Red Hat, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General
 * Public License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Author: Christian Kellner <gicmo@gnome.org> 
 */

#ifndef __G_BUFFERED_INPUT_STREAM_H__
#define __G_BUFFERED_INPUT_STREAM_H__

#include <glib-object.h>
#include <gio/gfilterinputstream.h>

G_BEGIN_DECLS

#define G_TYPE_BUFFERED_INPUT_STREAM         (g_buffered_input_stream_get_type ())
#define G_BUFFERED_INPUT_STREAM(o)           (G_TYPE_CHECK_INSTANCE_CAST ((o), G_TYPE_BUFFERED_INPUT_STREAM, GBufferedInputStream))
#define G_BUFFERED_INPUT_STREAM_CLASS(k)     (G_TYPE_CHECK_CLASS_CAST((k), G_TYPE_BUFFERED_INPUT_STREAM, GBufferedInputStreamClass))
#define G_IS_BUFFERED_INPUT_STREAM(o)        (G_TYPE_CHECK_INSTANCE_TYPE ((o), G_TYPE_BUFFERED_INPUT_STREAM))
#define G_IS_BUFFERED_INPUT_STREAM_CLASS(k)  (G_TYPE_CHECK_CLASS_TYPE ((k), G_TYPE_BUFFERED_INPUT_STREAM))
#define G_BUFFERED_INPUT_STREAM_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), G_TYPE_BUFFERED_INPUT_STREAM, GBufferedInputStreamClass))

/**
 * GBufferedInputStream:
 * 
 * Implements #GFilterInputStream with a sized input buffer.
 **/
typedef struct _GBufferedInputStream         GBufferedInputStream;
typedef struct _GBufferedInputStreamClass    GBufferedInputStreamClass;
typedef struct _GBufferedInputStreamPrivate  GBufferedInputStreamPrivate;

struct _GBufferedInputStream
{
  GFilterInputStream parent;

  /*< private >*/
  GBufferedInputStreamPrivate *priv;
};

struct _GBufferedInputStreamClass
{
 GFilterInputStreamClass parent_class;

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

  /* Async ops: (optional in derived classes) */
  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);

  /*< private >*/
  /* Padding for future expansion */
  void (*_g_reserved1) (void);
  void (*_g_reserved2) (void);
  void (*_g_reserved3) (void);
  void (*_g_reserved4) (void);
  void (*_g_reserved5) (void);
};


GType         g_buffered_input_stream_get_type        (void) G_GNUC_CONST;
GInputStream* g_buffered_input_stream_new             (GInputStream          *base_stream);
GInputStream* g_buffered_input_stream_new_sized       (GInputStream          *base_stream,
						       gsize                  size);

gsize         g_buffered_input_stream_get_buffer_size (GBufferedInputStream  *stream);
void          g_buffered_input_stream_set_buffer_size (GBufferedInputStream  *stream,
						       gsize                  size);
gsize         g_buffered_input_stream_get_available   (GBufferedInputStream  *stream);
gsize         g_buffered_input_stream_peek            (GBufferedInputStream  *stream,
						       void                  *buffer,
						       gsize                  offset,
						       gsize                  count);
const void*   g_buffered_input_stream_peek_buffer     (GBufferedInputStream  *stream,
						       gsize                 *count);

gssize        g_buffered_input_stream_fill            (GBufferedInputStream  *stream,
						       gssize                 count,
						       GCancellable          *cancellable,
						       GError               **error);
void          g_buffered_input_stream_fill_async      (GBufferedInputStream  *stream,
						       gssize                 count,
						       int                    io_priority,
						       GCancellable          *cancellable,
						       GAsyncReadyCallback    callback,
						       gpointer               user_data);
gssize        g_buffered_input_stream_fill_finish     (GBufferedInputStream  *stream,
						       GAsyncResult          *result,
						       GError               **error);

int           g_buffered_input_stream_read_byte       (GBufferedInputStream  *stream,
						       GCancellable          *cancellable,
						       GError               **error);


G_END_DECLS

#endif /* __G_BUFFERED_INPUT_STREAM_H__ */