68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
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/*
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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) 2012-2014 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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* You should have received a copy of the GNU Lesser General Public
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* License along with this program.
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* If not, see <http://www.gnu.org/licenses/>.
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*
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* moinakg@belenix.org, http://moinakg.wordpress.com/
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*
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*/
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#ifndef _PCOMPRESS_H
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#define _PCOMPRESS_H
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#include <pcompress.h>
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#include "utils/utils.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define METADATA_CHUNK_SIZE (2 * 1024 * 1024)
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#define METADATA_HDR_SZ (CHUNK_HDR_SZ + COMPRESSED_CHUNKSIZE + pctx->mac_bytes)
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struct _meta_ctx {
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int meta_pipes[2];
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pc_ctx_t *pctx;
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pthread_t meta_thread;
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uchar_t *frombuf, *tobuf;
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uint64_t frompos;
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uchar_t checksum[CKSUM_MAX_BYTES];
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void *lz4_dat;
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int comp_level;
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mac_ctx_t chunk_hmac;
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} meta_ctx_t;
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struct _meta_msg {
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uchar_t *buf;
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size_t len;
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} meta_msg_t;
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meta_ctx_t *meta_ctx_create(pc_ctx_t *pctx, int file_version int comp_fd);
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int meta_ctx_write(meta_ctx_t *mctx, meta_msg_t *msg);
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int meta_ctx_read(meta_ctx_t *mctx, meta_msg_t *msg);
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int meta_ctx_done(meta_ctx_t *mctx);
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void meta_ctx_close_sink_channel(meta_ctx_t *mctx);
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void meta_ctx_close_src_channel(meta_ctx_t *mctx);
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#ifdef __cplusplus
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}
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#endif
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#endif
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