| 1 | /*- |
| 2 | * SPDX-License-Identifier: BSD-2-Clause |
| 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 | |
| 29 | #ifndef _SYS__COMPRESSOR_H_ |
| 30 | #define _SYS__COMPRESSOR_H_ |
| 31 | |
| 32 | #ifdef _KERNEL |
| 33 | |
| 34 | /* Supported formats. */ |
| 35 | #define COMPRESS_GZIP 1 |
| 36 | #define COMPRESS_ZSTD 2 |
| 37 | |
| 38 | typedef int (*compressor_cb_t)(void *, size_t, off_t, void *); |
| 39 | |
| 40 | struct compressor; |
| 41 | |
| 42 | bool compressor_avail(int format); |
| 43 | struct compressor *compressor_init(compressor_cb_t cb, int format, |
| 44 | size_t maxiosize, int level, void *arg); |
| 45 | int compressor_format(const struct compressor *stream); |
| 46 | void compressor_reset(struct compressor *stream); |
| 47 | int compressor_write(struct compressor *stream, void *data, |
| 48 | size_t len); |
| 49 | int compressor_flush(struct compressor *stream); |
| 50 | void compressor_fini(struct compressor *stream); |
| 51 | |
| 52 | #endif /* _KERNEL */ |
| 53 | #endif /* _SYS__COMPRESSOR_H_ */ |