libgnomevfs/gnome-vfs-mime-sniff-buffer.h

   1 /*
   2  * gnome-vfs-mime-sniff-buffer.h
   3  * Utility for implementing gnome_vfs_mime_type_from_magic, and other
   4  * mime-type sniffing calls.
   5  *
   6  * Copyright (C) 2000 Eazel, Inc.
   7  * All rights reserved.
   8  *
   9  * This file is part of the Gnome Library.
  10  *
  11  * The Gnome Library is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU Library 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  * The Gnome Library 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 GNU
  19  * Library General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU Library General Public
  22  * License along with the Gnome Library; see the file COPYING.LIB.  If not,
  23  * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  24  * Boston, MA 02111-1307, USA.
  25  */
  26
  27 #ifndef GNOME_VFS_MIME_SNIFF_BUFFER_H
  28 #define GNOME_VFS_MIME_SNIFF_BUFFER_H
  29
  30 #include <libgnomevfs/gnome-vfs-handle.h>
  31
  32 G_BEGIN_DECLS
  33
  34 typedef GnomeVFSResult (* GnomeVFSSniffBufferSeekCall)(gpointer context,
  35                 GnomeVFSSeekPosition whence, GnomeVFSFileOffset offset);
  36 typedef GnomeVFSResult (* GnomeVFSSniffBufferReadCall)(gpointer context,
  37                 gpointer buffer, GnomeVFSFileSize bytes, GnomeVFSFileSize *bytes_read);
  38
  39 typedef struct GnomeVFSMimeSniffBuffer GnomeVFSMimeSniffBuffer;
  40
  41 void                     _gnome_vfs_mime_clear_magic_table              (void);
  42
  43 GnomeVFSMimeSniffBuffer *_gnome_vfs_mime_sniff_buffer_new_from_handle
  44                                         (GnomeVFSHandle                 *file);
  45 GnomeVFSMimeSniffBuffer *_gnome_vfs_mime_sniff_buffer_new_from_memory
  46                                         (const guchar                   *buffer,
  47                                          gssize                         buffer_size);
  48 GnomeVFSMimeSniffBuffer *gnome_vfs_mime_sniff_buffer_new_from_existing_data
  49                                         (const guchar                   *buffer,
  50                                          gssize                         buffer_size);
  51 GnomeVFSMimeSniffBuffer *_gnome_vfs_mime_sniff_buffer_new_generic
  52                                         (GnomeVFSSniffBufferSeekCall    seek_callback,
  53                                          GnomeVFSSniffBufferReadCall    read_callback,
  54                                          gpointer                       context);
  55
  56
  57 void                     gnome_vfs_mime_sniff_buffer_free
  58                                         (GnomeVFSMimeSniffBuffer        *buffer);
  59
  60 GnomeVFSResult           _gnome_vfs_mime_sniff_buffer_get
  61                                         (GnomeVFSMimeSniffBuffer        *buffer,
  62                                          gssize                         size);
  63
  64 const char              *gnome_vfs_get_mime_type_for_buffer
  65                                          (GnomeVFSMimeSniffBuffer       *buffer);
  66
  67 gboolean                 _gnome_vfs_sniff_buffer_looks_like_text
  68                                          (GnomeVFSMimeSniffBuffer       *buffer);
  69 gboolean                 _gnome_vfs_sniff_buffer_looks_like_mp3
  70                                          (GnomeVFSMimeSniffBuffer       *buffer);
  71 G_END_DECLS
  72
  73 #endif