1 /*
2 * DMG bzip2 uncompression
3 *
4 * Copyright (c) 2004 Johannes E. Schindelin
5 * Copyright (c) 2016 Red Hat, Inc.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 * THE SOFTWARE.
24 */
25 #include "qemu/osdep.h"
26 #include "dmg.h"
27 #include <bzlib.h>
28
dmg_uncompress_bz2_do(char * next_in,unsigned int avail_in,char * next_out,unsigned int avail_out)29 static int dmg_uncompress_bz2_do(char *next_in, unsigned int avail_in,
30 char *next_out, unsigned int avail_out)
31 {
32 int ret;
33 uint64_t total_out;
34 bz_stream bzstream = {};
35
36 ret = BZ2_bzDecompressInit(&bzstream, 0, 0);
37 if (ret != BZ_OK) {
38 return -1;
39 }
40 bzstream.next_in = next_in;
41 bzstream.avail_in = avail_in;
42 bzstream.next_out = next_out;
43 bzstream.avail_out = avail_out;
44 ret = BZ2_bzDecompress(&bzstream);
45 total_out = ((uint64_t)bzstream.total_out_hi32 << 32) +
46 bzstream.total_out_lo32;
47 BZ2_bzDecompressEnd(&bzstream);
48 if (ret != BZ_STREAM_END ||
49 total_out != avail_out) {
50 return -1;
51 }
52 return 0;
53 }
54
55 __attribute__((constructor))
dmg_bz2_init(void)56 static void dmg_bz2_init(void)
57 {
58 assert(!dmg_uncompress_bz2);
59 dmg_uncompress_bz2 = dmg_uncompress_bz2_do;
60 }
61