gio/gfileinputstream.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_FILE_INPUT_STREAM_H__
  28 #define __G_FILE_INPUT_STREAM_H__
  29
  30 #include <gio/ginputstream.h>
  31
  32 G_BEGIN_DECLS
  33
  34 #define G_TYPE_FILE_INPUT_STREAM         (g_file_input_stream_get_type ())
  35 #define G_FILE_INPUT_STREAM(o)           (G_TYPE_CHECK_INSTANCE_CAST ((o), G_TYPE_FILE_INPUT_STREAM, GFileInputStream))
  36 #define G_FILE_INPUT_STREAM_CLASS(k)     (G_TYPE_CHECK_CLASS_CAST((k), G_TYPE_FILE_INPUT_STREAM, GFileInputStreamClass))
  37 #define G_IS_FILE_INPUT_STREAM(o)        (G_TYPE_CHECK_INSTANCE_TYPE ((o), G_TYPE_FILE_INPUT_STREAM))
  38 #define G_IS_FILE_INPUT_STREAM_CLASS(k)  (G_TYPE_CHECK_CLASS_TYPE ((k), G_TYPE_FILE_INPUT_STREAM))
  39 #define G_FILE_INPUT_STREAM_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), G_TYPE_FILE_INPUT_STREAM, GFileInputStreamClass))
  40
  41 /**
  42  * GFileInputStream:
  43  *
  44  * A subclass of GInputStream for opened files. This adds
  45  * a few file-specific operations and seeking.
  46  *
  47  * #GFileInputStream implements #GSeekable.
  48  **/
  49 typedef struct _GFileInputStreamClass    GFileInputStreamClass;
  50 typedef struct _GFileInputStreamPrivate  GFileInputStreamPrivate;
  51
  52 struct _GFileInputStream
  53 {
  54   GInputStream parent_instance;
  55
  56   /*< private >*/
  57   GFileInputStreamPrivate *priv;
  58 };
  59
  60 struct _GFileInputStreamClass
  61 {
  62   GInputStreamClass parent_class;
  63
  64   goffset     (* tell)              (GFileInputStream     *stream);
  65   gboolean    (* can_seek)          (GFileInputStream     *stream);
  66   gboolean    (* seek)              (GFileInputStream     *stream,
  67                                      goffset               offset,
  68                                      GSeekType             type,
  69                                      GCancellable         *cancellable,
  70                                      GError              **error);
  71   GFileInfo * (* query_info)        (GFileInputStream     *stream,
  72                                      const char           *attributes,
  73                                      GCancellable         *cancellable,
  74                                      GError              **error);
  75   void        (* query_info_async)  (GFileInputStream     *stream,
  76                                      const char           *attributes,
  77                                      int                   io_priority,
  78                                      GCancellable         *cancellable,
  79                                      GAsyncReadyCallback   callback,
  80                                      gpointer              user_data);
  81   GFileInfo * (* query_info_finish) (GFileInputStream     *stream,
  82                                      GAsyncResult         *result,
  83                                      GError              **error);
  84
  85   /*< private >*/
  86   /* Padding for future expansion */
  87   void (*_g_reserved1) (void);
  88   void (*_g_reserved2) (void);
  89   void (*_g_reserved3) (void);
  90   void (*_g_reserved4) (void);
  91   void (*_g_reserved5) (void);
  92 };
  93
  94 GType      g_file_input_stream_get_type          (void) G_GNUC_CONST;
  95
  96 GFileInfo *g_file_input_stream_query_info        (GFileInputStream     *stream,
  97                                                   const char           *attributes,
  98                                                   GCancellable         *cancellable,
  99                                                   GError              **error);
 100 void       g_file_input_stream_query_info_async  (GFileInputStream     *stream,
 101                                                   const char           *attributes,
 102                                                   int                   io_priority,
 103                                                   GCancellable         *cancellable,
 104                                                   GAsyncReadyCallback   callback,
 105                                                   gpointer              user_data);
 106 GFileInfo *g_file_input_stream_query_info_finish (GFileInputStream     *stream,
 107                                                   GAsyncResult         *result,
 108                                                   GError              **error);
 109
 110 G_END_DECLS
 111
 112 #endif /* __G_FILE_FILE_INPUT_STREAM_H__ */