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/param.h>
29#include <err.h>
30#include <stdint.h>
31
32#include <lzma.h>
33
34#include "mkuzip.h"
35#include "mkuz_blk.h"
36#include "mkuz_lzma.h"
37
38struct mkuz_lzma {
39	lzma_filter filters[2];
40	lzma_options_lzma opt_lzma;
41	lzma_stream strm;
42};
43
44size_t
45mkuz_lzma_cbound(size_t blksz)
46{
47	return (lzma_stream_buffer_bound(blksz));
48}
49
50void *
51mkuz_lzma_init(int *comp_level)
52{
53	struct mkuz_lzma *ulp;
54
55	if (*comp_level == USE_DEFAULT_LEVEL)
56		*comp_level = LZMA_PRESET_DEFAULT;
57	if (*comp_level < 0 || *comp_level > 9)
58		errx(1, "provided compression level %d is invalid",
59		    *comp_level);
60		/* Not reached */
61
62	ulp = mkuz_safe_zmalloc(sizeof(struct mkuz_lzma));
63
64	/* Init lzma encoder */
65	ulp->strm = (lzma_stream)LZMA_STREAM_INIT;
66	if (lzma_lzma_preset(&ulp->opt_lzma, *comp_level))
67		errx(1, "Error loading LZMA preset");
68
69	ulp->filters[0].id = LZMA_FILTER_LZMA2;
70	ulp->filters[0].options = &ulp->opt_lzma;
71	ulp->filters[1].id = LZMA_VLI_UNKNOWN;
72
73	return (void *)ulp;
74}
75
76void
77mkuz_lzma_compress(void *p, const struct mkuz_blk *iblk, struct mkuz_blk *oblk)
78{
79	lzma_ret ret;
80	struct mkuz_lzma *ulp;
81
82	ulp = (struct mkuz_lzma *)p;
83
84	ret = lzma_stream_encoder(&ulp->strm, ulp->filters, LZMA_CHECK_CRC32);
85	if (ret != LZMA_OK) {
86		if (ret == LZMA_MEMLIMIT_ERROR)
87			errx(1, "can't compress data: LZMA_MEMLIMIT_ERROR");
88
89		errx(1, "can't compress data: LZMA compressor ERROR");
90	}
91
92	ulp->strm.next_in = iblk->data;
93	ulp->strm.avail_in = iblk->info.len;
94	ulp->strm.next_out = oblk->data;
95	ulp->strm.avail_out = oblk->alen;
96
97	ret = lzma_code(&ulp->strm, LZMA_FINISH);
98
99	if (ret != LZMA_STREAM_END)
100		errx(1, "lzma_code FINISH failed, code=%d, pos(in=%zd, "
101		    "out=%zd)", ret, (iblk->info.len - ulp->strm.avail_in),
102		    (oblk->alen - ulp->strm.avail_out));
103
104#if 0
105	lzma_end(&ulp->strm);
106#endif
107
108	oblk->info.len = oblk->alen - ulp->strm.avail_out;
109}
110