The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/compressor.h

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    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: stable/12/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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