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 void compressor_reset(struct compressor *stream); 46 int compressor_write(struct compressor *stream, void *data, 47 size_t len); 48 int compressor_flush(struct compressor *stream); 49 void compressor_fini(struct compressor *stream); 50 51 #endif /* _KERNEL */ 52 #endif /* _SYS__COMPRESSOR_H_ */ 53