gio/ginputstream.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: Alexander Larsson <alexl@redhat.com>
  21  */
  22
  23 #if !defined (__GIO_GIO_H_INSIDE__) && !defined (GIO_COMPILATION)
  24 #error "Only <gio/gio.h> can be included directly."
  25 #endif
  26
  27 #ifndef __G_INPUT_STREAM_H__
  28 #define __G_INPUT_STREAM_H__
  29
  30 #include <gio/giotypes.h>
  31
  32 G_BEGIN_DECLS
  33
  34 #define G_TYPE_INPUT_STREAM         (g_input_stream_get_type ())
  35 #define G_INPUT_STREAM(o)           (G_TYPE_CHECK_INSTANCE_CAST ((o), G_TYPE_INPUT_STREAM, GInputStream))
  36 #define G_INPUT_STREAM_CLASS(k)     (G_TYPE_CHECK_CLASS_CAST((k), G_TYPE_INPUT_STREAM, GInputStreamClass))
  37 #define G_IS_INPUT_STREAM(o)        (G_TYPE_CHECK_INSTANCE_TYPE ((o), G_TYPE_INPUT_STREAM))
  38 #define G_IS_INPUT_STREAM_CLASS(k)  (G_TYPE_CHECK_CLASS_TYPE ((k), G_TYPE_INPUT_STREAM))
  39 #define G_INPUT_STREAM_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), G_TYPE_INPUT_STREAM, GInputStreamClass))
  40
  41 /**
  42  * GInputStream:
  43  *
  44  * Base class for streaming input operations.
  45  **/
  46 typedef struct _GInputStreamClass    GInputStreamClass;
  47 typedef struct _GInputStreamPrivate  GInputStreamPrivate;
  48
  49 struct _GInputStream
  50 {
  51   GObject parent_instance;
  52
  53   /*< private >*/
  54   GInputStreamPrivate *priv;
  55 };
  56
  57 struct _GInputStreamClass
  58 {
  59   GObjectClass parent_class;
  60
  61   /* Sync ops: */
  62
  63   gssize   (* read_fn)      (GInputStream        *stream,
  64                              void                *buffer,
  65                              gsize                count,
  66                              GCancellable        *cancellable,
  67                              GError             **error);
  68   gssize   (* skip)         (GInputStream        *stream,
  69                              gsize                count,
  70                              GCancellable        *cancellable,
  71                              GError             **error);
  72   gboolean (* close_fn)     (GInputStream        *stream,
  73                              GCancellable        *cancellable,
  74                              GError             **error);
  75
  76   /* Async ops: (optional in derived classes) */
  77   void     (* read_async)   (GInputStream        *stream,
  78                              void                *buffer,
  79                              gsize                count,
  80                              int                  io_priority,
  81                              GCancellable        *cancellable,
  82                              GAsyncReadyCallback  callback,
  83                              gpointer             user_data);
  84   gssize   (* read_finish)  (GInputStream        *stream,
  85                              GAsyncResult        *result,
  86                              GError             **error);
  87   void     (* skip_async)   (GInputStream        *stream,
  88                              gsize                count,
  89                              int                  io_priority,
  90                              GCancellable        *cancellable,
  91                              GAsyncReadyCallback  callback,
  92                              gpointer             user_data);
  93   gssize   (* skip_finish)  (GInputStream        *stream,
  94                              GAsyncResult        *result,
  95                              GError             **error);
  96   void     (* close_async)  (GInputStream        *stream,
  97                              int                  io_priority,
  98                              GCancellable        *cancellable,
  99                              GAsyncReadyCallback  callback,
 100                              gpointer             user_data);
 101   gboolean (* close_finish) (GInputStream        *stream,
 102                              GAsyncResult        *result,
 103                              GError             **error);
 104
 105   /*< private >*/
 106   /* Padding for future expansion */
 107   void (*_g_reserved1) (void);
 108   void (*_g_reserved2) (void);
 109   void (*_g_reserved3) (void);
 110   void (*_g_reserved4) (void);
 111   void (*_g_reserved5) (void);
 112 };
 113
 114 GType    g_input_stream_get_type      (void) G_GNUC_CONST;
 115
 116 gssize   g_input_stream_read          (GInputStream          *stream,
 117                                        void                  *buffer,
 118                                        gsize                  count,
 119                                        GCancellable          *cancellable,
 120                                        GError               **error);
 121 gboolean g_input_stream_read_all      (GInputStream          *stream,
 122                                        void                  *buffer,
 123                                        gsize                  count,
 124                                        gsize                 *bytes_read,
 125                                        GCancellable          *cancellable,
 126                                        GError               **error);
 127 GLIB_AVAILABLE_IN_2_34
 128 GBytes  *g_input_stream_read_bytes    (GInputStream          *stream,
 129                                        gsize                  count,
 130                                        GCancellable          *cancellable,
 131                                        GError               **error);
 132 gssize   g_input_stream_skip          (GInputStream          *stream,
 133                                        gsize                  count,
 134                                        GCancellable          *cancellable,
 135                                        GError               **error);
 136 gboolean g_input_stream_close         (GInputStream          *stream,
 137                                        GCancellable          *cancellable,
 138                                        GError               **error);
 139 void     g_input_stream_read_async    (GInputStream          *stream,
 140                                        void                  *buffer,
 141                                        gsize                  count,
 142                                        int                    io_priority,
 143                                        GCancellable          *cancellable,
 144                                        GAsyncReadyCallback    callback,
 145                                        gpointer               user_data);
 146 gssize   g_input_stream_read_finish   (GInputStream          *stream,
 147                                        GAsyncResult          *result,
 148                                        GError               **error);
 149 GLIB_AVAILABLE_IN_2_34
 150 void     g_input_stream_read_bytes_async  (GInputStream          *stream,
 151                                            gsize                  count,
 152                                            int                    io_priority,
 153                                            GCancellable          *cancellable,
 154                                            GAsyncReadyCallback    callback,
 155                                            gpointer               user_data);
 156 GLIB_AVAILABLE_IN_2_34
 157 GBytes  *g_input_stream_read_bytes_finish (GInputStream          *stream,
 158                                            GAsyncResult          *result,
 159                                            GError               **error);
 160 void     g_input_stream_skip_async    (GInputStream          *stream,
 161                                        gsize                  count,
 162                                        int                    io_priority,
 163                                        GCancellable          *cancellable,
 164                                        GAsyncReadyCallback    callback,
 165                                        gpointer               user_data);
 166 gssize   g_input_stream_skip_finish   (GInputStream          *stream,
 167                                        GAsyncResult          *result,
 168                                        GError               **error);
 169 void     g_input_stream_close_async   (GInputStream          *stream,
 170                                        int                    io_priority,
 171                                        GCancellable          *cancellable,
 172                                        GAsyncReadyCallback    callback,
 173                                        gpointer               user_data);
 174 gboolean g_input_stream_close_finish  (GInputStream          *stream,
 175                                        GAsyncResult          *result,
 176                                        GError               **error);
 177
 178 /* For implementations: */
 179
 180 gboolean g_input_stream_is_closed     (GInputStream          *stream);
 181 gboolean g_input_stream_has_pending   (GInputStream          *stream);
 182 gboolean g_input_stream_set_pending   (GInputStream          *stream,
 183                                        GError               **error);
 184 void     g_input_stream_clear_pending (GInputStream          *stream);
 185
 186 G_END_DECLS
 187
 188 #endif /* __G_INPUT_STREAM_H__ */