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/*
* libhfs - library for reading and writing Macintosh HFS volumes
* Copyright (C) 2000 Klaus Halfmann <khalfmann@libra.de>^
* Original 1996-1998 Robert Leslie <rob@mars.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
* MA 02110-1301, USA.
*
* $Id: volume.h,v 1.11 2000/10/17 05:58:46 hasi Exp $
*/
#ifndef _H_VOLUME
#define _H_VOLUME
/* Open the device, read and verify the volume header
(and its backup) */
extern int volume_open(volume* vol, int os_fd);
/* Write back all data eventually cached and close the device. */
extern int volume_close(volume* vol);
/* read multiple blocks into given memory.
*
* returns given pointer or NULL on failure.
*/
extern void* volume_readfromfork(volume* vol, void* buf,
hfsp_fork_raw* f, UInt32 block,
UInt32 count, UInt8 forktype, UInt32 fileId);
/* Fill a given buffer with the given block in volume.
*/
int volume_readinbuf(volume * vol,void* buf, long block);
/* invalidat cache hold in volume, will be removed when
* caching strategy is clear to me. */
/*
extern inline void volume_invalidate_cache(volume* vol)
{
vol -> currblock = (UInt32) -1;
}
*/
/* Check in Allocation file if given block is allocated. */
extern int volume_allocated(volume* v, UInt32 block);
/* Read a raw hfsp_extent_rec from memory. */
extern void* volume_readextent(void *p, hfsp_extent_rec er);
/* Read fork information from raw memory */
extern void* volume_readfork(void *p, hfsp_fork_raw* f);
/* internal function used to create the extents btree,
is called by following inline fucntion when needed */
extern void volume_create_extents_tree(volume* vol);
/* accessor for entends btree, is created on demand */
static inline btree* volume_get_extents_tree(volume* vol) {
if (!vol->extents)
volume_create_extents_tree(vol);
return vol->extents;
}
/* Determine whether the volume is a HFS-plus volume */
int volume_probe(int fd, long long offset);
#ifdef DEBUG
/* Print raw fork information to stdout */
void volume_print_fork(hfsp_fork_raw* f);
/* Dump all the volume information to stdout */
void volume_print(hfsp_vh* vol);
#endif
#endif /* _H_VOLUME */
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