source: trunk/third/gnome-vfs/libgnomevfs/gnome-vfs-mime-sniff-buffer.h @ 17128

/*
 * gnome-vfs-mime-sniff-buffer.h
 * Utility for implementing gnome_vfs_mime_type_from_magic, and other
 * mime-type sniffing calls.
 *
 * Copyright (C) 2000 Eazel, Inc.
 * All rights reserved.
 *
 * This file is part of the Gnome Library.
 *
 * The Gnome Library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * The Gnome Library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with the Gnome Library; see the file COPYING.LIB.  If not,
 * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#ifndef GNOME_VFS_MIME_SNIFF_BUFFER_H
#define GNOME_VFS_MIME_SNIFF_BUFFER_H

#include <libgnomevfs/gnome-vfs-handle.h>

typedef GnomeVFSResult (* GnomeVFSSniffBufferSeekCall)(gpointer context, 
                GnomeVFSSeekPosition whence, GnomeVFSFileOffset offset);
typedef GnomeVFSResult (* GnomeVFSSniffBufferReadCall)(gpointer context, 
                gpointer buffer, GnomeVFSFileSize bytes, GnomeVFSFileSize *bytes_read);
                
typedef struct GnomeVFSMimeSniffBuffer GnomeVFSMimeSniffBuffer;

void                     gnome_vfs_mime_clear_magic_table               (void);

GnomeVFSMimeSniffBuffer *gnome_vfs_mime_sniff_buffer_new_from_handle    
                                        (GnomeVFSHandle                 *file);
GnomeVFSMimeSniffBuffer *gnome_vfs_mime_sniff_buffer_new_from_memory 
                                        (const guchar                   *buffer, 
                                         gssize                         buffer_size);
GnomeVFSMimeSniffBuffer *gnome_vfs_mime_sniff_buffer_new_from_existing_data     
                                        (const guchar                   *buffer, 
                                         gssize                         buffer_size);
GnomeVFSMimeSniffBuffer *gnome_vfs_mime_sniff_buffer_new_generic        
                                        (GnomeVFSSniffBufferSeekCall    seek_callback, 
                                         GnomeVFSSniffBufferReadCall    read_callback,
                                         gpointer                       context);


void                     gnome_vfs_mime_sniff_buffer_free 
                                        (GnomeVFSMimeSniffBuffer        *buffer);

GnomeVFSResult           gnome_vfs_mime_sniff_buffer_get
                                        (GnomeVFSMimeSniffBuffer        *buffer,
                                         gssize                         size);

const char              *gnome_vfs_get_mime_type_for_buffer
                                         (GnomeVFSMimeSniffBuffer       *buffer);

gboolean                 gnome_vfs_sniff_buffer_looks_like_text
                                         (GnomeVFSMimeSniffBuffer       *buffer);
gboolean                 gnome_vfs_sniff_buffer_looks_like_mp3
                                         (GnomeVFSMimeSniffBuffer       *buffer);
gboolean                 gnome_vfs_sniff_buffer_looks_like_gzip
                                         (GnomeVFSMimeSniffBuffer       *sniff_buffer,
                                          const char                    *file_name);

#endif