1/*
2 * Copyright (c) 2004-2016 Maxim Sobolev <sobomax@FreeBSD.org>
3 * Copyright (c) 2011 Aleksandr Rybalko <ray@ddteam.net>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are 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 the
13 *    documentation and/or other materials provided with the distribution.
14 *
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
25 * SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD$");
30
31#include <sys/param.h>
32#include <err.h>
33#include <stdint.h>
34
35#include <lzma.h>
36
37#include "mkuzip.h"
38#include "mkuz_lzma.h"
39#include "mkuz_blk.h"
40
41#define USED_BLOCKSIZE DEV_BSIZE
42
43struct mkuz_lzma {
44	lzma_filter filters[2];
45	lzma_options_lzma opt_lzma;
46	lzma_stream strm;
47	uint32_t blksz;
48};
49
50static const lzma_stream lzma_stream_init = LZMA_STREAM_INIT;
51
52void *
53mkuz_lzma_init(uint32_t blksz)
54{
55	struct mkuz_lzma *ulp;
56
57	if (blksz % USED_BLOCKSIZE != 0) {
58		errx(1, "cluster size should be multiple of %d",
59		    USED_BLOCKSIZE);
60		/* Not reached */
61	}
62	if (blksz > MAXPHYS) {
63		errx(1, "cluster size is too large");
64		/* Not reached */
65	}
66	ulp = mkuz_safe_zmalloc(sizeof(struct mkuz_lzma));
67
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");
72
73	ulp->filters[0].id = LZMA_FILTER_LZMA2;
74	ulp->filters[0].options = &ulp->opt_lzma;
75	ulp->filters[1].id = LZMA_VLI_UNKNOWN;
76
77	ulp->blksz = blksz;
78
79	return (void *)ulp;
80}
81
82struct mkuz_blk *
83mkuz_lzma_compress(void *p, const struct mkuz_blk *iblk)
84{
85	lzma_ret ret;
86        struct mkuz_blk *rval;
87	struct mkuz_lzma *ulp;
88
89	ulp = (struct mkuz_lzma *)p;
90
91        rval = mkuz_blk_ctor(ulp->blksz * 2);
92
93	ret = lzma_stream_encoder(&ulp->strm, ulp->filters, LZMA_CHECK_CRC32);
94	if (ret != LZMA_OK) {
95		if (ret == LZMA_MEMLIMIT_ERROR)
96			errx(1, "can't compress data: LZMA_MEMLIMIT_ERROR");
97
98		errx(1, "can't compress data: LZMA compressor ERROR");
99	}
100
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;
105
106	ret = lzma_code(&ulp->strm, LZMA_FINISH);
107
108	if (ret != LZMA_STREAM_END) {
109		/* Error */
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));
113	}
114
115#if 0
116	lzma_end(&ulp->strm);
117#endif
118
119	rval->info.len = rval->alen - ulp->strm.avail_out;
120	return (rval);
121}
122