a1825a2305
Restructure compression functions to take chunk flag as argument. Add missing error flag printing in LZMA. Only create enough threads as needed by chunk size and file size. Minor cleanups and variable name changes.
125 lines
3.9 KiB
C
125 lines
3.9 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 2.1 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_polynomial.h>
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#define CHDR_SZ 1
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#define ALGO_SZ 8
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#define MIN_CHUNK 2048
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#define VERSION 2
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#define FLAG_DEDUP 1
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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 COMPRESS_LZMA 1
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#define COMPRESS_BZIP2 2
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#define COMPRESS_PPMD 3
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#define CHUNK_FLAG_DEDUP 2
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#define COMP_EXTN ".pz"
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extern uint64_t lzma_crc64(const uint8_t *buf, size_t size, uint64_t crc);
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extern uint64_t lzma_crc64_8bchk(const uint8_t *buf, size_t size,
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uint64_t crc, uint64_t *cnt);
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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 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 adapt_init(void **data, int *level, ssize_t chunksize);
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extern int adapt2_init(void **data, int *level, ssize_t chunksize);
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extern int lzma_init(void **data, int *level, ssize_t chunksize);
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extern int ppmd_init(void **data, int *level, ssize_t chunksize);
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extern int bzip2_init(void **data, int *level, ssize_t chunksize);
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extern int zlib_init(void **data, int *level, ssize_t chunksize);
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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 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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/*
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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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rabin_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;
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uint64_t crc64;
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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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};
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#ifdef __cplusplus
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}
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#endif
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#endif
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