gio/goutputstream.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_OUTPUT_STREAM_H__
  28 #define __G_OUTPUT_STREAM_H__
  29
  30 #include <gio/giotypes.h>
  31
  32 G_BEGIN_DECLS
  33
  34 #define G_TYPE_OUTPUT_STREAM         (g_output_stream_get_type ())
  35 #define G_OUTPUT_STREAM(o)           (G_TYPE_CHECK_INSTANCE_CAST ((o), G_TYPE_OUTPUT_STREAM, GOutputStream))
  36 #define G_OUTPUT_STREAM_CLASS(k)     (G_TYPE_CHECK_CLASS_CAST((k), G_TYPE_OUTPUT_STREAM, GOutputStreamClass))
  37 #define G_IS_OUTPUT_STREAM(o)        (G_TYPE_CHECK_INSTANCE_TYPE ((o), G_TYPE_OUTPUT_STREAM))
  38 #define G_IS_OUTPUT_STREAM_CLASS(k)  (G_TYPE_CHECK_CLASS_TYPE ((k), G_TYPE_OUTPUT_STREAM))
  39 #define G_OUTPUT_STREAM_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), G_TYPE_OUTPUT_STREAM, GOutputStreamClass))
  40
  41 /**
  42  * GOutputStream:
  43  *
  44  * Base class for writing output.
  45  *
  46  * All classes derived from GOutputStream should implement synchronous
  47  * writing, splicing, flushing and closing streams, but may implement
  48  * asynchronous versions.
  49  **/
  50 typedef struct _GOutputStreamClass    GOutputStreamClass;
  51 typedef struct _GOutputStreamPrivate  GOutputStreamPrivate;
  52
  53 struct _GOutputStream
  54 {
  55   GObject parent_instance;
  56
  57   /*< private >*/
  58   GOutputStreamPrivate *priv;
  59 };
  60
  61
  62 struct _GOutputStreamClass
  63 {
  64   GObjectClass parent_class;
  65
  66   /* Sync ops: */
  67
  68   gssize      (* write_fn)      (GOutputStream            *stream,
  69                                  const void               *buffer,
  70                                  gsize                     count,
  71                                  GCancellable             *cancellable,
  72                                  GError                  **error);
  73   gssize      (* splice)        (GOutputStream            *stream,
  74                                  GInputStream             *source,
  75                                  GOutputStreamSpliceFlags  flags,
  76                                  GCancellable             *cancellable,
  77                                  GError                  **error);
  78   gboolean    (* flush)         (GOutputStream            *stream,
  79                                  GCancellable             *cancellable,
  80                                  GError                  **error);
  81   gboolean    (* close_fn)      (GOutputStream            *stream,
  82                                  GCancellable             *cancellable,
  83                                  GError                  **error);
  84
  85   /* Async ops: (optional in derived classes) */
  86
  87   void        (* write_async)   (GOutputStream            *stream,
  88                                  const void               *buffer,
  89                                  gsize                     count,
  90                                  int                       io_priority,
  91                                  GCancellable             *cancellable,
  92                                  GAsyncReadyCallback       callback,
  93                                  gpointer                  user_data);
  94   gssize      (* write_finish)  (GOutputStream            *stream,
  95                                  GAsyncResult             *result,
  96                                  GError                  **error);
  97   void        (* splice_async)  (GOutputStream            *stream,
  98                                  GInputStream             *source,
  99                                  GOutputStreamSpliceFlags  flags,
 100                                  int                       io_priority,
 101                                  GCancellable             *cancellable,
 102                                  GAsyncReadyCallback       callback,
 103                                  gpointer                  user_data);
 104   gssize      (* splice_finish) (GOutputStream            *stream,
 105                                  GAsyncResult             *result,
 106                                  GError                  **error);
 107   void        (* flush_async)   (GOutputStream            *stream,
 108                                  int                       io_priority,
 109                                  GCancellable             *cancellable,
 110                                  GAsyncReadyCallback       callback,
 111                                  gpointer                  user_data);
 112   gboolean    (* flush_finish)  (GOutputStream            *stream,
 113                                  GAsyncResult             *result,
 114                                  GError                  **error);
 115   void        (* close_async)   (GOutputStream            *stream,
 116                                  int                       io_priority,
 117                                  GCancellable             *cancellable,
 118                                  GAsyncReadyCallback       callback,
 119                                  gpointer                  user_data);
 120   gboolean    (* close_finish)  (GOutputStream            *stream,
 121                                  GAsyncResult             *result,
 122                                  GError                  **error);
 123
 124   /*< private >*/
 125   /* Padding for future expansion */
 126   void (*_g_reserved1) (void);
 127   void (*_g_reserved2) (void);
 128   void (*_g_reserved3) (void);
 129   void (*_g_reserved4) (void);
 130   void (*_g_reserved5) (void);
 131   void (*_g_reserved6) (void);
 132   void (*_g_reserved7) (void);
 133   void (*_g_reserved8) (void);
 134 };
 135
 136 GType    g_output_stream_get_type      (void) G_GNUC_CONST;
 137
 138 gssize   g_output_stream_write         (GOutputStream             *stream,
 139                                         const void                *buffer,
 140                                         gsize                      count,
 141                                         GCancellable              *cancellable,
 142                                         GError                   **error);
 143 gboolean g_output_stream_write_all     (GOutputStream             *stream,
 144                                         const void                *buffer,
 145                                         gsize                      count,
 146                                         gsize                     *bytes_written,
 147                                         GCancellable              *cancellable,
 148                                         GError                   **error);
 149 gssize   g_output_stream_splice        (GOutputStream             *stream,
 150                                         GInputStream              *source,
 151                                         GOutputStreamSpliceFlags   flags,
 152                                         GCancellable              *cancellable,
 153                                         GError                   **error);
 154 gboolean g_output_stream_flush         (GOutputStream             *stream,
 155                                         GCancellable              *cancellable,
 156                                         GError                   **error);
 157 gboolean g_output_stream_close         (GOutputStream             *stream,
 158                                         GCancellable              *cancellable,
 159                                         GError                   **error);
 160 void     g_output_stream_write_async   (GOutputStream             *stream,
 161                                         const void                *buffer,
 162                                         gsize                      count,
 163                                         int                        io_priority,
 164                                         GCancellable              *cancellable,
 165                                         GAsyncReadyCallback        callback,
 166                                         gpointer                   user_data);
 167 gssize   g_output_stream_write_finish  (GOutputStream             *stream,
 168                                         GAsyncResult              *result,
 169                                         GError                   **error);
 170 void     g_output_stream_splice_async  (GOutputStream             *stream,
 171                                         GInputStream              *source,
 172                                         GOutputStreamSpliceFlags   flags,
 173                                         int                        io_priority,
 174                                         GCancellable              *cancellable,
 175                                         GAsyncReadyCallback        callback,
 176                                         gpointer                   user_data);
 177 gssize   g_output_stream_splice_finish (GOutputStream             *stream,
 178                                         GAsyncResult              *result,
 179                                         GError                   **error);
 180 void     g_output_stream_flush_async   (GOutputStream             *stream,
 181                                         int                        io_priority,
 182                                         GCancellable              *cancellable,
 183                                         GAsyncReadyCallback        callback,
 184                                         gpointer                   user_data);
 185 gboolean g_output_stream_flush_finish  (GOutputStream             *stream,
 186                                         GAsyncResult              *result,
 187                                         GError                   **error);
 188 void     g_output_stream_close_async   (GOutputStream             *stream,
 189                                         int                        io_priority,
 190                                         GCancellable              *cancellable,
 191                                         GAsyncReadyCallback        callback,
 192                                         gpointer                   user_data);
 193 gboolean g_output_stream_close_finish  (GOutputStream             *stream,
 194                                         GAsyncResult              *result,
 195                                         GError                   **error);
 196
 197 gboolean g_output_stream_is_closed     (GOutputStream             *stream);
 198 gboolean g_output_stream_is_closing    (GOutputStream             *stream);
 199 gboolean g_output_stream_has_pending   (GOutputStream             *stream);
 200 gboolean g_output_stream_set_pending   (GOutputStream             *stream,
 201                                         GError                   **error);
 202 void     g_output_stream_clear_pending (GOutputStream             *stream);
 203
 204
 205 G_END_DECLS
 206
 207 #endif /* __G_OUTPUT_STREAM_H__ */