FreeBSD/Linux Kernel Cross Reference
sys/sys/compressor.h
1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2014, 2017 Mark Johnston <markj@FreeBSD.org>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in
13 * the documentation and/or other materials provided with the
14 * distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD: releng/12.0/sys/sys/compressor.h 329240 2018-02-13 19:28:02Z markj $
29 */
30
31 #ifndef _SYS__COMPRESSOR_H_
32 #define _SYS__COMPRESSOR_H_
33
34 #ifdef _KERNEL
35
36 /* Supported formats. */
37 #define COMPRESS_GZIP 1
38 #define COMPRESS_ZSTD 2
39
40 typedef int (*compressor_cb_t)(void *, size_t, off_t, void *);
41
42 struct compressor;
43
44 bool compressor_avail(int format);
45 struct compressor *compressor_init(compressor_cb_t cb, int format,
46 size_t maxiosize, int level, void *arg);
47 void compressor_reset(struct compressor *stream);
48 int compressor_write(struct compressor *stream, void *data,
49 size_t len);
50 int compressor_flush(struct compressor *stream);
51 void compressor_fini(struct compressor *stream);
52
53 #endif /* _KERNEL */
54 #endif /* _SYS__COMPRESSOR_H_ */
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