2 * Copyright (c) 2007 Alexander Motin <mav@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice unmodified, this list of conditions, and the following
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * MPPC decompression library.
32 * Note that Hi/Fn (later acquired by Exar Corporation) held US patents
33 * on some implementation-critical aspects of MPPC compression.
34 * These patents lapsed due to non-payment of fees in 2007 and by 2015
41 #define MPPC_MANDATORY_COMPRESS_FLAGS 0
42 #define MPPC_MANDATORY_DECOMPRESS_FLAGS 0
44 #define MPPC_SAVE_HISTORY 1
47 #define MPPC_EXPANDED 8
48 #define MPPC_RESTART_HISTORY 16
49 #define MPPC_DEST_EXHAUSTED 32
51 extern size_t MPPC_SizeOfCompressionHistory(void);
52 extern size_t MPPC_SizeOfDecompressionHistory(void);
54 extern void MPPC_InitCompressionHistory(char *history);
55 extern void MPPC_InitDecompressionHistory(char *history);
57 extern int MPPC_Compress(u_char **src, u_char **dst, u_long *srcCnt, u_long *dstCnt, char *history, int flags, int undef);
58 extern int MPPC_Decompress(u_char **src, u_char **dst, u_long *srcCnt, u_long *dstCnt, char *history, int flags);