pcompress/rabin/global/index.h

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/*
* This file is a part of Pcompress, a chunked parallel multi-
* algorithm lossless compression and decompression program.
*
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* Copyright (C) 2012-2013 Moinak Ghosh. All rights reserved.
* Use is subject to license terms.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
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* You should have received a copy of the GNU Lesser General Public
* License along with this program.
* If not, see <http://www.gnu.org/licenses/>.
*
* moinakg@belenix.org, http://moinakg.wordpress.com/
*/
#ifndef _INDEX_H
#define _INDEX_H
#include <dedupe_config.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* Publically visible In-memory hashtable entry.
*/
typedef struct _hash_entry {
uint64_t item_offset;
uint32_t item_size;
struct _hash_entry *next;
uchar_t cksum[1];
} hash_entry_t;
archive_config_t *init_global_db(char *configfile);
int setup_db_config_s(archive_config_t *cfg, uint32_t chunksize, uint64_t *user_chunk_sz,
int *pct_interval, const char *algo, cksum_t ck, cksum_t ck_sim,
size_t file_sz, uint32_t *hash_slots, int *hash_entry_size,
uint64_t *memreqd, size_t memlimit, char *tmppath);
archive_config_t *init_global_db_s(char *path, char *tmppath, uint32_t chunksize,
uint64_t user_chunk_sz, int pct_interval, const char *algo,
cksum_t ck, cksum_t ck_sim, size_t file_sz, size_t memlimit,
int nthreads);
hash_entry_t *db_lookup_insert_s(archive_config_t *cfg, uchar_t *sim_cksum, int interval,
uint64_t item_offset, uint32_t item_size, int do_insert);
void destroy_global_db_s(archive_config_t *cfg);
int db_segcache_write(archive_config_t *cfg, int tid, uchar_t *buf, uint32_t len, uint32_t blknum, uint64_t file_offset);
void db_segcache_sync(archive_config_t *cfg);
int db_segcache_pos(archive_config_t *cfg, int tid);
int db_segcache_map(archive_config_t *cfg, int tid, uint32_t *blknum, uint64_t *offset, uchar_t **blocks);
int db_segcache_unmap(archive_config_t *cfg, int tid);
#ifdef __cplusplus
}
#endif
#endif