2 * Copyright (c) 2004-2016 Maxim Sobolev <sobomax@FreeBSD.org>
3 * Copyright (c) 2011 Aleksandr Rybalko <ray@ddteam.net>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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 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
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
38 #include "mkuz_lzma.h"
41 #define USED_BLOCKSIZE DEV_BSIZE
44 lzma_filter filters[2];
45 lzma_options_lzma opt_lzma;
50 static const lzma_stream lzma_stream_init = LZMA_STREAM_INIT;
53 mkuz_lzma_init(uint32_t blksz)
55 struct mkuz_lzma *ulp;
57 if (blksz % USED_BLOCKSIZE != 0) {
58 errx(1, "cluster size should be multiple of %d",
62 if (blksz > MAXPHYS) {
63 errx(1, "cluster size is too large");
66 ulp = mkuz_safe_zmalloc(sizeof(struct mkuz_lzma));
68 /* Init lzma encoder */
69 ulp->strm = lzma_stream_init;
70 if (lzma_lzma_preset(&ulp->opt_lzma, LZMA_PRESET_DEFAULT))
71 errx(1, "Error loading LZMA preset");
73 ulp->filters[0].id = LZMA_FILTER_LZMA2;
74 ulp->filters[0].options = &ulp->opt_lzma;
75 ulp->filters[1].id = LZMA_VLI_UNKNOWN;
83 mkuz_lzma_compress(void *p, const struct mkuz_blk *iblk)
86 struct mkuz_blk *rval;
87 struct mkuz_lzma *ulp;
89 ulp = (struct mkuz_lzma *)p;
91 rval = mkuz_blk_ctor(ulp->blksz * 2);
93 ret = lzma_stream_encoder(&ulp->strm, ulp->filters, LZMA_CHECK_CRC32);
95 if (ret == LZMA_MEMLIMIT_ERROR)
96 errx(1, "can't compress data: LZMA_MEMLIMIT_ERROR");
98 errx(1, "can't compress data: LZMA compressor ERROR");
101 ulp->strm.next_in = iblk->data;
102 ulp->strm.avail_in = ulp->blksz;
103 ulp->strm.next_out = rval->data;
104 ulp->strm.avail_out = rval->alen;
106 ret = lzma_code(&ulp->strm, LZMA_FINISH);
108 if (ret != LZMA_STREAM_END) {
110 errx(1, "lzma_code FINISH failed, code=%d, pos(in=%zd, "
111 "out=%zd)", ret, (ulp->blksz - ulp->strm.avail_in),
112 (ulp->blksz * 2 - ulp->strm.avail_out));
116 lzma_end(&ulp->strm);
119 rval->info.len = rval->alen - ulp->strm.avail_out;