cc6d349714
Squashfs now supports XZ and LZO compression in addition to ZLIB. As such it no longer makes sense to always include ZLIB support. In particular embedded systems may only use LZO or XZ compression, and the ability to exclude ZLIB support will reduce kernel size. Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>
63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
#ifndef DECOMPRESSOR_H
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#define DECOMPRESSOR_H
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/*
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* Squashfs - a compressed read only filesystem for Linux
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*
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* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
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* Phillip Lougher <phillip@squashfs.org.uk>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2,
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* or (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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* decompressor.h
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*/
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struct squashfs_decompressor {
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void *(*init)(struct squashfs_sb_info *, void *, int);
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void (*free)(void *);
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int (*decompress)(struct squashfs_sb_info *, void **,
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struct buffer_head **, int, int, int, int, int);
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int id;
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char *name;
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int supported;
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};
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static inline void squashfs_decompressor_free(struct squashfs_sb_info *msblk,
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void *s)
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{
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if (msblk->decompressor)
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msblk->decompressor->free(s);
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}
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static inline int squashfs_decompress(struct squashfs_sb_info *msblk,
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void **buffer, struct buffer_head **bh, int b, int offset, int length,
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int srclength, int pages)
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{
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return msblk->decompressor->decompress(msblk, buffer, bh, b, offset,
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length, srclength, pages);
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}
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#ifdef CONFIG_SQUASHFS_XZ
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extern const struct squashfs_decompressor squashfs_xz_comp_ops;
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#endif
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#ifdef CONFIG_SQUASHFS_LZO
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extern const struct squashfs_decompressor squashfs_lzo_comp_ops;
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#endif
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#ifdef CONFIG_SQUASHFS_ZLIB
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extern const struct squashfs_decompressor squashfs_zlib_comp_ops;
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#endif
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#endif
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