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8cd3d45ad9
- HOLE - it simply turns all-zero blocks into few bytes header; it is extremely fast, so it is turned on by default; it is mostly intended to speed up initial synchronization where we expect many zeros; - LZF - very fast algorithm by Marc Alexander Lehmann, which shows very decent compression ratio and has BSD license. MFC after: 2 weeks
45 lines
1.8 KiB
C
45 lines
1.8 KiB
C
/*-
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* Copyright (c) 2011 Pawel Jakub Dawidek <pawel@dawidek.net>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _HAST_COMPRESSION_H_
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#define _HAST_COMPRESSION_H_
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#include <stdlib.h> /* size_t */
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#include <hast.h>
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#include <nv.h>
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const char *compression_name(int num);
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int compression_send(const struct hast_resource *res, struct nv *nv,
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void **datap, size_t *sizep, bool *freedatap);
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int compression_recv(const struct hast_resource *res, struct nv *nv,
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void **datap, size_t *sizep, bool *freedatap);
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#endif /* !_HAST_COMPRESSION_H_ */
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