59 lines
2.2 KiB
C
59 lines
2.2 KiB
C
/*
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* libhfs - library for reading and writing Macintosh HFS volumes
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*
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* The iterator shown here iterates over the blocks of a fork.
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*
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* Copyright (C) 2000 Klaus Halfmann <khalfmann@libra.de>
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* Original work by 1996-1998 Robert Leslie <rob@mars.org>
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* other work 2000 from Brad Boyer (flar@pants.nu)
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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., 51 Franklin Street - Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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* $Id: blockiter.h,v 1.1 2000/10/10 11:14:05 hasi Exp $
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*/
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/* Structure of the blockiterator */
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typedef struct
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{
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volume* vol; // volume we iterate over
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UInt32 curr_block; // current, absolute block
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UInt32 block; // relative block in current extent
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UInt32 max_block; // Maximum allowed block
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UInt32 fileId; // id of file we iterate over
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int index; // 0 .. 7 in current extent
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hfsp_extent* file; // original extent record from file
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hfsp_extent* e; // current extentent under examination
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UInt8 forktype; // type of fork we iterate over
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UInt8 in_extent; // boolean 0 - in file extent
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// 1 - in extents file
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extent_record er; // record to iterate in extents file.
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} blockiter;
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/* Initialize iterator for a given fork */
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extern void blockiter_init(blockiter* b, volume* vol, hfsp_fork_raw* f,
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UInt8 forktype, UInt32 fileId);
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/* find next block of the fork iterating over */
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extern int blockiter_next(blockiter *b);
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/* skip the indicated number of blocks */
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extern int blockiter_skip(blockiter *b, UInt32 skip);
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/* return current block */
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static inline UInt32 blockiter_curr(blockiter *b)
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{
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return b->e->start_block + b->block;
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}
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