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48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
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#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 lznt1_decompress ( const void *data, size_t len, void *buf );
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#endif /* _LZNT1_H */
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