gio/gbufferedinputstream.h

   1 /* GIO - GLib Input, Output and Streaming Library
   2  *
   3  * Copyright (C) 2006-2007 Red Hat, Inc.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General
  16  * Public License along with this library; if not, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  *
  20  * Author: Christian Kellner <gicmo@gnome.org>
  21  */
  22
  23 #ifndef __G_BUFFERED_INPUT_STREAM_H__
  24 #define __G_BUFFERED_INPUT_STREAM_H__
  25
  26 #include <glib-object.h>
  27 #include <gio/gfilterinputstream.h>
  28
  29 G_BEGIN_DECLS
  30
  31 #define G_TYPE_BUFFERED_INPUT_STREAM         (g_buffered_input_stream_get_type ())
  32 #define G_BUFFERED_INPUT_STREAM(o)           (G_TYPE_CHECK_INSTANCE_CAST ((o), G_TYPE_BUFFERED_INPUT_STREAM, GBufferedInputStream))
  33 #define G_BUFFERED_INPUT_STREAM_CLASS(k)     (G_TYPE_CHECK_CLASS_CAST((k), G_TYPE_BUFFERED_INPUT_STREAM, GBufferedInputStreamClass))
  34 #define G_IS_BUFFERED_INPUT_STREAM(o)        (G_TYPE_CHECK_INSTANCE_TYPE ((o), G_TYPE_BUFFERED_INPUT_STREAM))
  35 #define G_IS_BUFFERED_INPUT_STREAM_CLASS(k)  (G_TYPE_CHECK_CLASS_TYPE ((k), G_TYPE_BUFFERED_INPUT_STREAM))
  36 #define G_BUFFERED_INPUT_STREAM_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), G_TYPE_BUFFERED_INPUT_STREAM, GBufferedInputStreamClass))
  37
  38 /**
  39  * GBufferedInputStream:
  40  *
  41  * Implements #GFilterInputStream with a sized input buffer.
  42  **/
  43 typedef struct _GBufferedInputStream         GBufferedInputStream;
  44 typedef struct _GBufferedInputStreamClass    GBufferedInputStreamClass;
  45 typedef struct _GBufferedInputStreamPrivate  GBufferedInputStreamPrivate;
  46
  47 struct _GBufferedInputStream
  48 {
  49   GFilterInputStream parent;
  50
  51   /*< private >*/
  52   GBufferedInputStreamPrivate *priv;
  53 };
  54
  55 struct _GBufferedInputStreamClass
  56 {
  57  GFilterInputStreamClass parent_class;
  58
  59   gssize   (* fill)        (GBufferedInputStream *stream,
  60                             gssize                count,
  61                             GCancellable         *cancellable,
  62                             GError              **error);
  63
  64   /* Async ops: (optional in derived classes) */
  65   void     (* fill_async)  (GBufferedInputStream *stream,
  66                             gssize                count,
  67                             int                   io_priority,
  68                             GCancellable         *cancellable,
  69                             GAsyncReadyCallback   callback,
  70                             gpointer              user_data);
  71   gssize   (* fill_finish) (GBufferedInputStream *stream,
  72                             GAsyncResult         *result,
  73                             GError              **error);
  74
  75   /*< private >*/
  76   /* Padding for future expansion */
  77   void (*_g_reserved1) (void);
  78   void (*_g_reserved2) (void);
  79   void (*_g_reserved3) (void);
  80   void (*_g_reserved4) (void);
  81   void (*_g_reserved5) (void);
  82 };
  83
  84
  85 GType         g_buffered_input_stream_get_type        (void) G_GNUC_CONST;
  86 GInputStream* g_buffered_input_stream_new             (GInputStream          *base_stream);
  87 GInputStream* g_buffered_input_stream_new_sized       (GInputStream          *base_stream,
  88                                                        gsize                  size);
  89
  90 gsize         g_buffered_input_stream_get_buffer_size (GBufferedInputStream  *stream);
  91 void          g_buffered_input_stream_set_buffer_size (GBufferedInputStream  *stream,
  92                                                        gsize                  size);
  93 gsize         g_buffered_input_stream_get_available   (GBufferedInputStream  *stream);
  94 gsize         g_buffered_input_stream_peek            (GBufferedInputStream  *stream,
  95                                                        void                  *buffer,
  96                                                        gsize                  offset,
  97                                                        gsize                  count);
  98 const void*   g_buffered_input_stream_peek_buffer     (GBufferedInputStream  *stream,
  99                                                        gsize                 *count);
 100
 101 gssize        g_buffered_input_stream_fill            (GBufferedInputStream  *stream,
 102                                                        gssize                 count,
 103                                                        GCancellable          *cancellable,
 104                                                        GError               **error);
 105 void          g_buffered_input_stream_fill_async      (GBufferedInputStream  *stream,
 106                                                        gssize                 count,
 107                                                        int                    io_priority,
 108                                                        GCancellable          *cancellable,
 109                                                        GAsyncReadyCallback    callback,
 110                                                        gpointer               user_data);
 111 gssize        g_buffered_input_stream_fill_finish     (GBufferedInputStream  *stream,
 112                                                        GAsyncResult          *result,
 113                                                        GError               **error);
 114
 115 int           g_buffered_input_stream_read_byte       (GBufferedInputStream  *stream,
 116                                                        GCancellable          *cancellable,
 117                                                        GError               **error);
 118
 119
 120 G_END_DECLS
 121
 122 #endif /* __G_BUFFERED_INPUT_STREAM_H__ */