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 #include <sys/param.h>
37 #include "mkuz_lzma.h"
40 lzma_filter filters[2];
41 lzma_options_lzma opt_lzma;
46 mkuz_lzma_cbound(size_t blksz)
48 return (lzma_stream_buffer_bound(blksz));
52 mkuz_lzma_init(int *comp_level)
54 struct mkuz_lzma *ulp;
56 if (*comp_level == USE_DEFAULT_LEVEL)
57 *comp_level = LZMA_PRESET_DEFAULT;
58 if (*comp_level < 0 || *comp_level > 9)
59 errx(1, "provided compression level %d is invalid",
63 ulp = mkuz_safe_zmalloc(sizeof(struct mkuz_lzma));
65 /* Init lzma encoder */
66 ulp->strm = (lzma_stream)LZMA_STREAM_INIT;
67 if (lzma_lzma_preset(&ulp->opt_lzma, *comp_level))
68 errx(1, "Error loading LZMA preset");
70 ulp->filters[0].id = LZMA_FILTER_LZMA2;
71 ulp->filters[0].options = &ulp->opt_lzma;
72 ulp->filters[1].id = LZMA_VLI_UNKNOWN;
78 mkuz_lzma_compress(void *p, const struct mkuz_blk *iblk, struct mkuz_blk *oblk)
81 struct mkuz_lzma *ulp;
83 ulp = (struct mkuz_lzma *)p;
85 ret = lzma_stream_encoder(&ulp->strm, ulp->filters, LZMA_CHECK_CRC32);
87 if (ret == LZMA_MEMLIMIT_ERROR)
88 errx(1, "can't compress data: LZMA_MEMLIMIT_ERROR");
90 errx(1, "can't compress data: LZMA compressor ERROR");
93 ulp->strm.next_in = iblk->data;
94 ulp->strm.avail_in = iblk->info.len;
95 ulp->strm.next_out = oblk->data;
96 ulp->strm.avail_out = oblk->alen;
98 ret = lzma_code(&ulp->strm, LZMA_FINISH);
100 if (ret != LZMA_STREAM_END)
101 errx(1, "lzma_code FINISH failed, code=%d, pos(in=%zd, "
102 "out=%zd)", ret, (iblk->info.len - ulp->strm.avail_in),
103 (oblk->alen - ulp->strm.avail_out));
106 lzma_end(&ulp->strm);
109 oblk->info.len = oblk->alen - ulp->strm.avail_out;