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49 lines
1.4 KiB
C
49 lines
1.4 KiB
C
#ifndef _LZNT1_H
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#define _LZNT1_H
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/*
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* Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.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 as
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* published by the Free Software Foundation; either version 2 of the
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* License, 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, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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, MA
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* 02110-1301, USA.
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*/
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/**
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* @file
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*
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* LZNT1 decompression
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*
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*/
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#include <stdint.h>
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/** Extract LZNT1 block length */
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#define LZNT1_BLOCK_LEN(header) (((header) & 0x0fff) + 1)
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/** Determine if LZNT1 block is compressed */
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#define LZNT1_BLOCK_COMPRESSED(header) ((header) & 0x8000)
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/** Extract LZNT1 compressed value length */
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#define LZNT1_VALUE_LEN(tuple, split) \
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(((tuple) & ((1 << (split)) - 1)) + 3)
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/** Extract LZNT1 compressed value offset */
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#define LZNT1_VALUE_OFFSET(tuple, split) (((tuple) >> split) + 1)
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extern ssize_t
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lznt1_decompress (const void *data, size_t len, void *buf);
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#endif /* _LZNT1_H */
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