2 * libhfs - library for reading and writing Macintosh HFS volumes
4 * The iterator shown here iterates over the blocks of a fork.
6 * Copyright (C) 2000 Klaus Halfmann <khalfmann@libra.de>
7 * Original work by 1996-1998 Robert Leslie <rob@mars.org>
8 * other work 2000 from Brad Boyer (flar@pants.nu)
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
25 * $Id: blockiter.h,v 1.1 2000/10/10 11:14:05 hasi Exp $
28 /* Structure of the blockiterator */
31 volume* vol; // volume we iterate over
32 UInt32 curr_block; // current, absolute block
33 UInt32 block; // relative block in current extent
34 UInt32 max_block; // Maximum allowed block
35 UInt32 fileId; // id of file we iterate over
36 int index; // 0 .. 7 in current extent
37 hfsp_extent* file; // original extent record from file
38 hfsp_extent* e; // current extentent under examination
39 UInt8 forktype; // type of fork we iterate over
40 UInt8 in_extent; // boolean 0 - in file extent
41 // 1 - in extents file
42 extent_record er; // record to iterate in extents file.
45 /* Initialize iterator for a given fork */
46 extern void blockiter_init(blockiter* b, volume* vol, hfsp_fork_raw* f,
47 UInt8 forktype, UInt32 fileId);
49 /* find next block of the fork iterating over */
50 extern int blockiter_next(blockiter *b);
52 /* skip the indicated number of blocks */
53 extern int blockiter_skip(blockiter *b, UInt32 skip);
55 /* return current block */
56 static inline UInt32 blockiter_curr(blockiter *b)
58 return b->e->start_block + b->block;