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diff --git a/include/ntfs-3g/runlist.h b/include/ntfs-3g/runlist.h new file mode 100755 index 0000000..43de53c --- a/dev/null +++ b/include/ntfs-3g/runlist.h @@ -0,0 +1,89 @@ +/* + * runlist.h - Exports for runlist handling. Originated from the Linux-NTFS project. + * + * Copyright (c) 2002 Anton Altaparmakov + * Copyright (c) 2002 Richard Russon + * + * This program/include file 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/include file 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 (in the main directory of the NTFS-3G + * distribution in the file COPYING); if not, write to the Free Software + * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#ifndef _NTFS_RUNLIST_H +#define _NTFS_RUNLIST_H + +#include "types.h" + +/* Forward declarations */ +typedef struct _runlist_element runlist_element; +typedef runlist_element runlist; + +#include "attrib.h" +#include "volume.h" + +/** + * struct _runlist_element - in memory vcn to lcn mapping array element. + * @vcn: starting vcn of the current array element + * @lcn: starting lcn of the current array element + * @length: length in clusters of the current array element + * + * The last vcn (in fact the last vcn + 1) is reached when length == 0. + * + * When lcn == -1 this means that the count vcns starting at vcn are not + * physically allocated (i.e. this is a hole / data is sparse). + */ +struct _runlist_element {/* In memory vcn to lcn mapping structure element. */ + VCN vcn; /* vcn = Starting virtual cluster number. */ + LCN lcn; /* lcn = Starting logical cluster number. */ + s64 length; /* Run length in clusters. */ +}; + +extern runlist_element *ntfs_rl_extend(runlist_element *rl, int more_entries); + +extern LCN ntfs_rl_vcn_to_lcn(const runlist_element *rl, const VCN vcn); + +extern s64 ntfs_rl_pread(const ntfs_volume *vol, const runlist_element *rl, + const s64 pos, s64 count, void *b); +extern s64 ntfs_rl_pwrite(const ntfs_volume *vol, const runlist_element *rl, + s64 ofs, const s64 pos, s64 count, void *b); + +extern runlist_element *ntfs_runlists_merge(runlist_element *drl, + runlist_element *srl); + +extern runlist_element *ntfs_mapping_pairs_decompress(const ntfs_volume *vol, + const ATTR_RECORD *attr, runlist_element *old_rl); + +extern int ntfs_get_nr_significant_bytes(const s64 n); + +extern int ntfs_get_size_for_mapping_pairs(const ntfs_volume *vol, + const runlist_element *rl, const VCN start_vcn, int max_size); + +extern int ntfs_write_significant_bytes(u8 *dst, const u8 *dst_max, + const s64 n); + +extern int ntfs_mapping_pairs_build(const ntfs_volume *vol, u8 *dst, + const int dst_len, const runlist_element *rl, + const VCN start_vcn, runlist_element const **stop_rl); + +extern int ntfs_rl_truncate(runlist **arl, const VCN start_vcn); + +extern int ntfs_rl_sparse(runlist *rl); +extern s64 ntfs_rl_get_compressed_size(ntfs_volume *vol, runlist *rl); + +#ifdef NTFS_TEST +int test_rl_main(int argc, char *argv[]); +#endif + +#endif /* defined _NTFS_RUNLIST_H */ + |