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, see <http://www.gnu.org/licenses/>.
  17  *
  18  * Author: Alexander Larsson <alexl@redhat.com>
  19  */
  20
  21 #ifndef __G_INPUT_STREAM_H__
  22 #define __G_INPUT_STREAM_H__
  23
  24 #if !defined (__GIO_GIO_H_INSIDE__) && !defined (GIO_COMPILATION)
  25 #error "Only <gio/gio.h> can be included directly."
  26 #endif
  27
  28 #include <gio/giotypes.h>
  29
  30 G_BEGIN_DECLS
  31
  32 #define G_TYPE_INPUT_STREAM         (g_input_stream_get_type ())
  33 #define G_INPUT_STREAM(o)           (G_TYPE_CHECK_INSTANCE_CAST ((o), G_TYPE_INPUT_STREAM, GInputStream))
  34 #define G_INPUT_STREAM_CLASS(k)     (G_TYPE_CHECK_CLASS_CAST((k), G_TYPE_INPUT_STREAM, GInputStreamClass))
  35 #define G_IS_INPUT_STREAM(o)        (G_TYPE_CHECK_INSTANCE_TYPE ((o), G_TYPE_INPUT_STREAM))
  36 #define G_IS_INPUT_STREAM_CLASS(k)  (G_TYPE_CHECK_CLASS_TYPE ((k), G_TYPE_INPUT_STREAM))
  37 #define G_INPUT_STREAM_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), G_TYPE_INPUT_STREAM, GInputStreamClass))
  38
  39 /**
  40  * GInputStream:
  41  *
  42  * Base class for streaming input operations.
  43  **/
  44 typedef struct _GInputStreamClass    GInputStreamClass;
  45 typedef struct _GInputStreamPrivate  GInputStreamPrivate;
  46
  47 struct _GInputStream
  48 {
  49   GObject parent_instance;
  50
  51   /*< private >*/
  52   GInputStreamPrivate *priv;
  53 };
  54
  55 struct _GInputStreamClass
  56 {
  57   GObjectClass parent_class;
  58
  59   /* Sync ops: */
  60
  61   gssize   (* read_fn)      (GInputStream        *stream,
  62                              void                *buffer,
  63                              gsize                count,
  64                              GCancellable        *cancellable,
  65                              GError             **error);
  66   gssize   (* skip)         (GInputStream        *stream,
  67                              gsize                count,
  68                              GCancellable        *cancellable,
  69                              GError             **error);
  70   gboolean (* close_fn)     (GInputStream        *stream,
  71                              GCancellable        *cancellable,
  72                              GError             **error);
  73
  74   /* Async ops: (optional in derived classes) */
  75   void     (* read_async)   (GInputStream        *stream,
  76                              void                *buffer,
  77                              gsize                count,
  78                              int                  io_priority,
  79                              GCancellable        *cancellable,
  80                              GAsyncReadyCallback  callback,
  81                              gpointer             user_data);
  82   gssize   (* read_finish)  (GInputStream        *stream,
  83                              GAsyncResult        *result,
  84                              GError             **error);
  85   void     (* skip_async)   (GInputStream        *stream,
  86                              gsize                count,
  87                              int                  io_priority,
  88                              GCancellable        *cancellable,
  89                              GAsyncReadyCallback  callback,
  90                              gpointer             user_data);
  91   gssize   (* skip_finish)  (GInputStream        *stream,
  92                              GAsyncResult        *result,
  93                              GError             **error);
  94   void     (* close_async)  (GInputStream        *stream,
  95                              int                  io_priority,
  96                              GCancellable        *cancellable,
  97                              GAsyncReadyCallback  callback,
  98                              gpointer             user_data);
  99   gboolean (* close_finish) (GInputStream        *stream,
 100                              GAsyncResult        *result,
 101                              GError             **error);
 102
 103   /*< private >*/
 104   /* Padding for future expansion */
 105   void (*_g_reserved1) (void);
 106   void (*_g_reserved2) (void);
 107   void (*_g_reserved3) (void);
 108   void (*_g_reserved4) (void);
 109   void (*_g_reserved5) (void);
 110 };
 111
 112 GLIB_AVAILABLE_IN_ALL
 113 GType    g_input_stream_get_type      (void) G_GNUC_CONST;
 114
 115 GLIB_AVAILABLE_IN_ALL
 116 gssize   g_input_stream_read          (GInputStream          *stream,
 117                                        void                  *buffer,
 118                                        gsize                  count,
 119                                        GCancellable          *cancellable,
 120                                        GError               **error);
 121 GLIB_AVAILABLE_IN_ALL
 122 gboolean g_input_stream_read_all      (GInputStream          *stream,
 123                                        void                  *buffer,
 124                                        gsize                  count,
 125                                        gsize                 *bytes_read,
 126                                        GCancellable          *cancellable,
 127                                        GError               **error);
 128 GLIB_AVAILABLE_IN_2_34
 129 GBytes  *g_input_stream_read_bytes    (GInputStream          *stream,
 130                                        gsize                  count,
 131                                        GCancellable          *cancellable,
 132                                        GError               **error);
 133 GLIB_AVAILABLE_IN_ALL
 134 gssize   g_input_stream_skip          (GInputStream          *stream,
 135                                        gsize                  count,
 136                                        GCancellable          *cancellable,
 137                                        GError               **error);
 138 GLIB_AVAILABLE_IN_ALL
 139 gboolean g_input_stream_close         (GInputStream          *stream,
 140                                        GCancellable          *cancellable,
 141                                        GError               **error);
 142 GLIB_AVAILABLE_IN_ALL
 143 void     g_input_stream_read_async    (GInputStream          *stream,
 144                                        void                  *buffer,
 145                                        gsize                  count,
 146                                        int                    io_priority,
 147                                        GCancellable          *cancellable,
 148                                        GAsyncReadyCallback    callback,
 149                                        gpointer               user_data);
 150 GLIB_AVAILABLE_IN_ALL
 151 gssize   g_input_stream_read_finish   (GInputStream          *stream,
 152                                        GAsyncResult          *result,
 153                                        GError               **error);
 154
 155 GLIB_AVAILABLE_IN_2_44
 156 void     g_input_stream_read_all_async    (GInputStream          *stream,
 157                                            void                  *buffer,
 158                                            gsize                  count,
 159                                            int                    io_priority,
 160                                            GCancellable          *cancellable,
 161                                            GAsyncReadyCallback    callback,
 162                                            gpointer               user_data);
 163 GLIB_AVAILABLE_IN_2_44
 164 gboolean g_input_stream_read_all_finish   (GInputStream          *stream,
 165                                            GAsyncResult          *result,
 166                                            gsize                 *bytes_read,
 167                                            GError               **error);
 168
 169 GLIB_AVAILABLE_IN_2_34
 170 void     g_input_stream_read_bytes_async  (GInputStream          *stream,
 171                                            gsize                  count,
 172                                            int                    io_priority,
 173                                            GCancellable          *cancellable,
 174                                            GAsyncReadyCallback    callback,
 175                                            gpointer               user_data);
 176 GLIB_AVAILABLE_IN_2_34
 177 GBytes  *g_input_stream_read_bytes_finish (GInputStream          *stream,
 178                                            GAsyncResult          *result,
 179                                            GError               **error);
 180 GLIB_AVAILABLE_IN_ALL
 181 void     g_input_stream_skip_async    (GInputStream          *stream,
 182                                        gsize                  count,
 183                                        int                    io_priority,
 184                                        GCancellable          *cancellable,
 185                                        GAsyncReadyCallback    callback,
 186                                        gpointer               user_data);
 187 GLIB_AVAILABLE_IN_ALL
 188 gssize   g_input_stream_skip_finish   (GInputStream          *stream,
 189                                        GAsyncResult          *result,
 190                                        GError               **error);
 191 GLIB_AVAILABLE_IN_ALL
 192 void     g_input_stream_close_async   (GInputStream          *stream,
 193                                        int                    io_priority,
 194                                        GCancellable          *cancellable,
 195                                        GAsyncReadyCallback    callback,
 196                                        gpointer               user_data);
 197 GLIB_AVAILABLE_IN_ALL
 198 gboolean g_input_stream_close_finish  (GInputStream          *stream,
 199                                        GAsyncResult          *result,
 200                                        GError               **error);
 201
 202 /* For implementations: */
 203
 204 GLIB_AVAILABLE_IN_ALL
 205 gboolean g_input_stream_is_closed     (GInputStream          *stream);
 206 GLIB_AVAILABLE_IN_ALL
 207 gboolean g_input_stream_has_pending   (GInputStream          *stream);
 208 GLIB_AVAILABLE_IN_ALL
 209 gboolean g_input_stream_set_pending   (GInputStream          *stream,
 210                                        GError               **error);
 211 GLIB_AVAILABLE_IN_ALL
 212 void     g_input_stream_clear_pending (GInputStream          *stream);
 213
 214 G_END_DECLS
 215
 216 #endif /* __G_INPUT_STREAM_H__ */