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2a709f28fa
* 0day explit mitigation * Memory corruption prevention * Privilege escalation prevention * Buffer over flow prevention * File System corruption defense * Thread escape prevention This may very well be the most intensive inclusion to BrooklynR. This will not be part of an x86 suite nor it will be released as tool kit. The security core toolkit will remain part of kernel base.
88 lines
3.1 KiB
C
88 lines
3.1 KiB
C
#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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#define LZ4_MEM_COMPRESS (16384)
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#define LZ4HC_MEM_COMPRESS (262144 + (2 * sizeof(unsigned char *)))
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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_compress()
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* src : source address of the original data
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* src_len : size of the original data
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* dst : output buffer address of the compressed data
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* This requires 'dst' of size LZ4_COMPRESSBOUND.
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* dst_len : is the output size, which is returned after compress done
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* workmem : address of the working memory.
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* This requires 'workmem' of size LZ4_MEM_COMPRESS.
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* return : Success if return 0
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* Error if return (< 0)
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* note : Destination buffer and workmem must be already allocated with
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* the defined size.
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*/
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int lz4_compress(const unsigned char *src, size_t src_len,
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unsigned char *dst, size_t *dst_len, void *wrkmem);
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/*
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* lz4hc_compress()
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* src : source address of the original data
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* src_len : size of the original data
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* dst : output buffer address of the compressed data
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* This requires 'dst' of size LZ4_COMPRESSBOUND.
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* dst_len : is the output size, which is returned after compress done
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* workmem : address of the working memory.
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* This requires 'workmem' of size LZ4HC_MEM_COMPRESS.
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* return : Success if return 0
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* Error if return (< 0)
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* note : Destination buffer and workmem must be already allocated with
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* the defined size.
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*/
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int lz4hc_compress(const unsigned char *src, size_t src_len,
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unsigned char *dst, size_t *dst_len, void *wrkmem);
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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 unsigned char *src, size_t *src_len,
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unsigned char *dest, 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 unsigned char *src, size_t src_len,
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unsigned char *dest, size_t *dest_len);
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#endif
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