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/* |
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* libhfs - library for reading and writing Macintosh HFS volumes |
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* |
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* Copyright (C) 2000 Klaus Halfmann <klaus.halfmann@feri.de> |
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* Original 1996-1998 Robert Leslie <rob@mars.org> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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* |
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*/ |
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|
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/* Open the device, read and verify the volume header |
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(and its backup) */ |
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extern int volume_open(volume* vol, const void *devicehandle, int partition, int rw); |
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|
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/* Write back all data eventually cached and close the device. */ |
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extern int volume_close(volume* vol); |
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|
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/* read multiple blocks into given memory. |
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* |
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* returns given pointer or NULL on failure. |
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*/ |
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extern void* volume_readfromfork(volume* vol, void* buf, |
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hfsp_fork_raw* f, UInt32 block, |
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UInt32 count, UInt8 forktype, UInt32 fileId); |
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|
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/* write multiple blocks of a fork buf to medium. |
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* The caller is responsible for allocating a suffient |
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* large fork and eventually needed extends records for now. |
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* |
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* block realtive index in fork to start with |
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* count number of blocks to write |
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* forktype usually HFSP_EXTENT_DATA or HFSP_EXTENT_RSRC |
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* fileId id (needed) in case extents must be written |
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* |
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* returns value != 0 on error. |
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*/ |
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int volume_writetofork(volume* vol, void* buf, |
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hfsp_fork_raw* f, UInt32 block, |
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UInt32 count, UInt8 forktype, UInt32 fileId); |
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|
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/* Fill a given buffer with the given block in volume. |
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*/ |
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int volume_readinbuf(volume * vol,void* buf, long block); |
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|
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/* Check in Allocation file if given block is allocated. */ |
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extern int volume_allocated(volume* v, UInt32 block); |
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|
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/* Read a raw hfsp_extent_rec from memory. */ |
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extern char* volume_readextent(char *p, hfsp_extent_rec er); |
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|
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/* Read fork information from raw memory */ |
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extern char* volume_readfork(char *p, hfsp_fork_raw* f); |
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|
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/* Write fork information to raw memory */ |
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extern char* volume_writefork(char *p, hfsp_fork_raw* f); |
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|
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/* Initialize for to all zero, you may allocate later */ |
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void volume_initfork(volume* vol, hfsp_fork_raw* f, UInt16 fork_type); |
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|
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/* internal function used to create the extents btree, |
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is called by following inline function when needed */ |
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extern void volume_create_extents_tree(volume* vol); |
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|
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/* accessor for entends btree, is created on demand */ |
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static inline btree* volume_get_extents_tree(volume* vol) |
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{ |
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if (!vol->extents) |
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volume_create_extents_tree(vol); |
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return vol->extents; |
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} |
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|
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/* return new Id for files/folder and check for overflow. |
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* |
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* retun 0 on error . |
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*/ |
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extern UInt32 volume_get_nextid(volume* vol); |
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