block/dmg.h

   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 typedef int BdrvDmgUncompressFunc(char *next_in, unsigned int avail_in,
  55                                   char *next_out, unsigned int avail_out);
  56
  57 extern BdrvDmgUncompressFunc *dmg_uncompress_bz2;
  58 extern BdrvDmgUncompressFunc *dmg_uncompress_lzfse;
  59
  60 #endif