camel/camel-seekable-substream.h

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
   2 /* camel-seekable-substream.h : stream */
   3
   4 /*
   5  *
   6  * Author :
   7  *  Bertrand Guiheneuf <bertrand@helixcode.com>
   8  *
   9  * Copyright 1999, 2000 Helix Code, Inc. (http://www.helixcode.com)
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License as
  13  * published by the Free Software Foundation; either version 2 of the
  14  * License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  24  * USA
  25  */
  26
  27
  28 #ifndef CAMEL_SEEKABLE_SUBSTREAM_H
  29 #define CAMEL_SEEKABLE_SUBSTREAM_H 1
  30
  31
  32 #ifdef __cplusplus
  33 extern "C" {
  34 #pragma }
  35 #endif /* __cplusplus }*/
  36
  37 #include <gtk/gtk.h>
  38 #include "camel-types.h"
  39 #include "camel-seekable-stream.h"
  40
  41
  42 #define CAMEL_SEEKABLE_SUBSTREAM_TYPE       (camel_seekable_substream_get_type ())
  43 #define CAMEL_SEEKABLE_SUBSTREAM(obj)       (GTK_CHECK_CAST((obj), CAMEL_SEEKABLE_SUBSTREAM_TYPE, CamelSeekableSubstream))
  44 #define CAMEL_SEEKABLE_SUBSTREAM_CLASS(k)   (GTK_CHECK_CLASS_CAST ((k), CAMEL_SEEKABLE_SUBSTREAM_TYPE, CamelSeekableSubstreamClass))
  45 #define CAMEL_IS_SEEKABLE_SUBSTREAM(o)      (GTK_CHECK_TYPE((o), CAMEL_SEEKABLE_SUBSTREAM_TYPE))
  46
  47
  48
  49
  50 struct _CamelSeekableSubstream
  51 {
  52         CamelSeekableStream parent_object;
  53
  54         /*  --**-- Private fields --**--  */
  55         CamelSeekableStream *parent_stream;   /* the stream this substream uses */
  56         guint32 cur_pos;                      /* current postion in the stream */
  57         guint32 inf_bound;                    /* first valid position */
  58         gint64  sup_bound;                    /* first invalid position */
  59         gboolean open;
  60         gboolean eos;
  61
  62 };
  63
  64
  65
  66 typedef struct {
  67         CamelSeekableStreamClass parent_class;
  68
  69         /* Virtual methods */
  70         void (*init_with_seekable_stream_and_bounds) (CamelSeekableSubstream *seekable_substream,
  71                                                       CamelSeekableStream    *parent_stream,
  72                                                       guint32 inf_bound,
  73                                                       gint64  sup_bound);
  74
  75 } CamelSeekableSubstreamClass;
  76
  77
  78
  79 /* Standard Gtk function */
  80 GtkType camel_seekable_substream_get_type (void);
  81
  82
  83 /* public methods */
  84
  85 /* obtain a new seekable substream */
  86 CamelSeekableSubstream *
  87 camel_seekable_substream_new_with_seekable_stream_and_bounds (CamelSeekableStream    *parent_stream,
  88                                                               guint32                 inf_bound,
  89                                                               gint64                  sup_bound);
  90
  91 #ifdef __cplusplus
  92 }
  93 #endif /* __cplusplus */
  94
  95 #endif /* CAMEL_SEEKABLE_SUBSTREAM_H */