diff options
Diffstat (limited to 'qemu/roms/openbios/fs/hfsplus/hfsp_blockiter.c')
| -rw-r--r-- | qemu/roms/openbios/fs/hfsplus/hfsp_blockiter.c | 141 |
1 files changed, 0 insertions, 141 deletions
diff --git a/qemu/roms/openbios/fs/hfsplus/hfsp_blockiter.c b/qemu/roms/openbios/fs/hfsplus/hfsp_blockiter.c deleted file mode 100644 index e91009229..000000000 --- a/qemu/roms/openbios/fs/hfsplus/hfsp_blockiter.c +++ /dev/null @@ -1,141 +0,0 @@ -/* - * libhfs - library for reading and writing Macintosh HFS volumes - * - * The iterator shown here iterates over the blocks of a fork. - * - * Copyright (C) 2000 Klaus Halfmann <khalfmann@libra.de> - * Original work by 1996-1998 Robert Leslie <rob@mars.org> - * other work 2000 from Brad Boyer (flar@pants.nu) - * - * 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: blockiter.c,v 1.2 2000/10/17 05:58:46 hasi Exp $ - */ - -#include "config.h" -#include "libhfsp.h" -#include "blockiter.h" -#include "volume.h" -#include "record.h" -#include "btree.h" -#include "os.h" -#include "swab.h" -#include "hfstime.h" - -/* Initialize iterator for a given fork */ -void -blockiter_init(blockiter* b, volume* vol, hfsp_fork_raw* f, - UInt8 forktype, UInt32 fileId) -{ - b->vol = vol; - b->curr_block = 0; - b->block = 0; - b->max_block = f->total_blocks; - b->fileId = fileId; - b->index = 0; - b->file = f->extents; - b->e = f->extents; - b->forktype = forktype; - b->in_extent = 0; -} - -/* get next extent record when needed */ -static int -blockiter_next_extent(blockiter *b) -{ - btree* extents_tree = volume_get_extents_tree(b->vol); - int err; - - b->index = 0; - if (b->in_extent) // already using extents record ? - { - err = record_next_extent(&b->er); - // Hope there is no need to check this ... - // if (b->er.key.start_block != b->curr_block) - // HFSP_ERROR(ENOENT, - // "Extents record inconistent"); - } - else - { - err = record_init_file(&b->er, extents_tree, b->forktype, - b->fileId, b->curr_block); - b->in_extent = -1; // true - } - b->e = b->er.extent; - return err; -} - -/* find next block of the fork iterating over */ -int -blockiter_next(blockiter *b) -{ - b->curr_block ++; - b->block ++; - if (b->curr_block >= b->max_block) - return -1; // end of Blocks, but no error - // in current part of extent ? - if (b->block >= b->e->block_count) - { - b->index++; - b->block = 0; // reset relative position - b->e++; - if (b -> index >= 8) // need to fetch another extent - { - if (blockiter_next_extent(b)) - HFSP_ERROR(ENOENT, "Extends record not found."); - } - } - return 0; - - fail: - return -1; -} - -/* skip the indicated number of blocks */ -int -blockiter_skip(blockiter *b, UInt32 skip) -{ - while (skip > 0) - { - // Skip to skip or end of current extent - UInt32 diff = b->e->block_count - b->block; - if (skip < diff) - { - diff = skip; - skip = 0; - } - else - skip -= diff; - b->curr_block += diff; - b->block += diff; - if (b->curr_block >= b->max_block) - return -1; // end of Blocks, but no error - if (b->block >= b->e->block_count) - { - b->index++; - b->block = 0; // reset relative position - b->e++; - if (b -> index >= 8) // need to fetch another extent - { - if (blockiter_next_extent(b)) - HFSP_ERROR(ENOENT, "Extends record not found."); - } - } - } // we are here when skip was null, thats ok - return 0; - fail: - return -1; -} |