185 lines
6.4 KiB
C
185 lines
6.4 KiB
C
/*
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* This file is a part of Pcompress, a chunked parallel multi-
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* algorithm lossless compression and decompression program.
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*
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* Copyright (C) 2012 Moinak Ghosh. All rights reserved.
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* Use is subject to license terms.
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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 Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 3 of the 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,
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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 GNU
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* Lesser General Public License for more details.
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*
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* moinakg@belenix.org, http://moinakg.wordpress.com/
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*
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* This program includes partly-modified public domain source
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* code from the LZMA SDK: http://www.7-zip.org/sdk.html
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*/
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#ifndef _PCOMPRESS_H
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#define _PCOMPRESS_H
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#include <sys/types.h>
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#include <pthread.h>
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#include <semaphore.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <rabin_dedup.h>
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#include <crypto_utils.h>
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#define CHUNK_FLAG_SZ 1
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#define ALGO_SZ 8
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#define MIN_CHUNK 2048
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#define VERSION 4
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#define FLAG_DEDUP 1
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#define FLAG_DEDUP_FIXED 2
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#define FLAG_SINGLE_CHUNK 4
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#define UTILITY_VERSION "0.8.6"
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#define MASK_CRYPTO_ALG 0x30
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#define MAX_LEVEL 14
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#define COMPRESSED 1
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#define UNCOMPRESSED 0
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#define CHSIZE_MASK 0x80
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#define BZIP2_A_NUM 16
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#define LZMA_A_NUM 32
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#define CHUNK_FLAG_DEDUP 2
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#define CHUNK_FLAG_PREPROC 4
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#define COMP_EXTN ".pz"
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#define PREPROC_TYPE_LZP 1
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#define PREPROC_COMPRESSED 128
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/*
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* Sizes of chunk header components.
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*/
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#define COMPRESSED_CHUNKSZ (sizeof (uint64_t))
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#define ORIGINAL_CHUNKSZ (sizeof (uint64_t))
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#define CHUNK_HDR_SZ (COMPRESSED_CHUNKSZ + cksum_bytes + ORIGINAL_CHUNKSZ + CHUNK_FLAG_SZ)
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/*
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* lower 3 bits in higher nibble indicate chunk compression algorithm
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* in adaptive modes.
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*/
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#define COMPRESS_LZMA 1
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#define COMPRESS_BZIP2 2
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#define COMPRESS_PPMD 3
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#define CHDR_ALGO_MASK 7
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extern uint32_t zlib_buf_extra(ssize_t buflen);
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extern int lz4_buf_extra(ssize_t buflen);
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extern int zlib_compress(void *src, size_t srclen, void *dst,
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size_t *destlen, int level, uchar_t chdr, void *data);
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extern int lzma_compress(void *src, size_t srclen, void *dst,
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size_t *destlen, int level, uchar_t chdr, void *data);
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extern int bzip2_compress(void *src, size_t srclen, void *dst,
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size_t *destlen, int level, uchar_t chdr, void *data);
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extern int adapt_compress(void *src, size_t srclen, void *dst,
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size_t *dstlen, int level, uchar_t chdr, void *data);
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extern int ppmd_compress(void *src, size_t srclen, void *dst,
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size_t *dstlen, int level, uchar_t chdr, void *data);
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extern int lz_fx_compress(void *src, size_t srclen, void *dst,
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size_t *dstlen, int level, uchar_t chdr, void *data);
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extern int lz4_compress(void *src, size_t srclen, void *dst,
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size_t *dstlen, int level, uchar_t chdr, void *data);
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extern int none_compress(void *src, size_t srclen, void *dst,
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size_t *dstlen, int level, uchar_t chdr, void *data);
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extern int zlib_decompress(void *src, size_t srclen, void *dst,
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size_t *dstlen, int level, uchar_t chdr, void *data);
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extern int lzma_decompress(void *src, size_t srclen, void *dst,
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size_t *dstlen, int level, uchar_t chdr, void *data);
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extern int bzip2_decompress(void *src, size_t srclen, void *dst,
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size_t *dstlen, int level, uchar_t chdr, void *data);
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extern int adapt_decompress(void *src, size_t srclen, void *dst,
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size_t *dstlen, int level, uchar_t chdr, void *data);
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extern int ppmd_decompress(void *src, size_t srclen, void *dst,
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size_t *dstlen, int level, uchar_t chdr, void *data);
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extern int lz_fx_decompress(void *src, size_t srclen, void *dst,
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size_t *dstlen, int level, uchar_t chdr, void *data);
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extern int lz4_decompress(void *src, size_t srclen, void *dst,
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size_t *dstlen, int level, uchar_t chdr, void *data);
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extern int none_decompress(void *src, size_t srclen, void *dst,
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size_t *dstlen, int level, uchar_t chdr, void *data);
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extern int adapt_init(void **data, int *level, int nthreads, ssize_t chunksize);
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extern int adapt2_init(void **data, int *level, int nthreads, ssize_t chunksize);
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extern int lzma_init(void **data, int *level, int nthreads, ssize_t chunksize);
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extern int ppmd_init(void **data, int *level, int nthreads, ssize_t chunksize);
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extern int bzip2_init(void **data, int *level, int nthreads, ssize_t chunksize);
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extern int zlib_init(void **data, int *level, int nthreads, ssize_t chunksize);
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extern int lz_fx_init(void **data, int *level, int nthreads, ssize_t chunksize);
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extern int lz4_init(void **data, int *level, int nthreads, ssize_t chunksize);
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extern int none_init(void **data, int *level, int nthreads, ssize_t chunksize);
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extern void lzma_props(algo_props_t *data, int level, ssize_t chunksize);
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extern void lzma_mt_props(algo_props_t *data, int level, ssize_t chunksize);
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extern void lz4_props(algo_props_t *data, int level, ssize_t chunksize);
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extern int zlib_deinit(void **data);
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extern int adapt_deinit(void **data);
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extern int lzma_deinit(void **data);
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extern int ppmd_deinit(void **data);
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extern int lz_fx_deinit(void **data);
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extern int lz4_deinit(void **data);
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extern int none_deinit(void **data);
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extern void adapt_stats(int show);
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extern void ppmd_stats(int show);
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extern void lzma_stats(int show);
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extern void bzip2_stats(int show);
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extern void zlib_stats(int show);
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extern void lz_fx_stats(int show);
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extern void lz4_stats(int show);
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extern void none_stats(int show);
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#ifdef ENABLE_PC_LIBBSC
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extern int libbsc_compress(void *src, size_t srclen, void *dst,
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size_t *dstlen, int level, uchar_t chdr, void *data);
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extern int libbsc_decompress(void *src, size_t srclen, void *dst,
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size_t *dstlen, int level, uchar_t chdr, void *data);
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extern int libbsc_init(void **data, int *level, int nthreads, ssize_t chunksize);
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extern void libbsc_props(algo_props_t *data, int level, ssize_t chunksize);
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extern int libbsc_deinit(void **data);
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extern void libbsc_stats(int show);
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#endif
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/*
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* Per-thread data structure for compression and decompression threads.
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*/
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struct cmp_data {
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uchar_t *cmp_seg;
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uchar_t *compressed_chunk;
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uchar_t *uncompressed_chunk;
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dedupe_context_t *rctx;
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ssize_t rbytes;
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ssize_t chunksize;
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ssize_t len_cmp, len_cmp_be;
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uchar_t checksum[CKSUM_MAX_BYTES];
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int level;
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unsigned int id;
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compress_func_ptr compress;
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compress_func_ptr decompress;
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int cancel;
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sem_t start_sem;
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sem_t cmp_done_sem;
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sem_t write_done_sem;
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void *data;
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pthread_t thr;
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mac_ctx_t chunk_hmac;
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};
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#ifdef __cplusplus
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}
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#endif
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#endif
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