xref: /openbmc/qemu/block/dmg.h (revision b14df228)
1 /*
2  * Header for DMG driver
3  *
4  * Copyright (c) 2004-2006 Fabrice Bellard
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 
26 #ifndef BLOCK_DMG_H
27 #define BLOCK_DMG_H
28 
29 #include "block/block_int.h"
30 #include <zlib.h>
31 
32 typedef struct BDRVDMGState {
33     CoMutex lock;
34     /* each chunk contains a certain number of sectors,
35      * offsets[i] is the offset in the .dmg file,
36      * lengths[i] is the length of the compressed chunk,
37      * sectors[i] is the sector beginning at offsets[i],
38      * sectorcounts[i] is the number of sectors in that chunk,
39      * the sectors array is ordered
40      * 0<=i<n_chunks */
41 
42     uint32_t n_chunks;
43     uint32_t *types;
44     uint64_t *offsets;
45     uint64_t *lengths;
46     uint64_t *sectors;
47     uint64_t *sectorcounts;
48     uint32_t current_chunk;
49     uint8_t *compressed_chunk;
50     uint8_t *uncompressed_chunk;
51     z_stream zstream;
52 } BDRVDMGState;
53 
54 extern int (*dmg_uncompress_bz2)(char *next_in, unsigned int avail_in,
55                                  char *next_out, unsigned int avail_out);
56 
57 extern int (*dmg_uncompress_lzfse)(char *next_in, unsigned int avail_in,
58                                    char *next_out, unsigned int avail_out);
59 
60 #endif
61