52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
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#ifndef __LZ4_H__
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#define __LZ4_H__
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/*
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* LZ4 Kernel Interface
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*
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* Copyright (C) 2013, LG Electronics, Kyungsik Lee <kyungsik.lee@lge.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/*
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* lz4_compressbound()
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* Provides the maximum size that LZ4 may output in a "worst case" scenario
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* (input data not compressible)
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*/
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static inline size_t lz4_compressbound(size_t isize)
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{
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return isize + (isize / 255) + 16;
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}
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/*
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* lz4_decompress()
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* src : source address of the compressed data
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* src_len : is the input size, whcih is returned after decompress done
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* dest : output buffer address of the decompressed data
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* actual_dest_len: is the size of uncompressed data, supposing it's known
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* return : Success if return 0
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* Error if return (< 0)
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* note : Destination buffer must be already allocated.
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* slightly faster than lz4_decompress_unknownoutputsize()
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*/
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int lz4_decompress(const char *src, size_t *src_len, char *dest,
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size_t actual_dest_len);
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/*
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* lz4_decompress_unknownoutputsize()
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* src : source address of the compressed data
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* src_len : is the input size, therefore the compressed size
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* dest : output buffer address of the decompressed data
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* dest_len: is the max size of the destination buffer, which is
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* returned with actual size of decompressed data after
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* decompress done
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* return : Success if return 0
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* Error if return (< 0)
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* note : Destination buffer must be already allocated.
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*/
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int lz4_decompress_unknownoutputsize(const char *src, size_t src_len,
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char *dest, size_t *dest_len);
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#endif
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