Fam Zheng | 27685a8 | 2016-09-05 10:50:45 +0800 | [diff] [blame] | 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" |
Fam Zheng | 27685a8 | 2016-09-05 10:50:45 +0800 | [diff] [blame] | 26 | #include "dmg.h" |
| 27 | #include <bzlib.h> |
| 28 | |
| 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)) |
| 56 | static void dmg_bz2_init(void) |
| 57 | { |
| 58 | assert(!dmg_uncompress_bz2); |
| 59 | dmg_uncompress_bz2 = dmg_uncompress_bz2_do; |
| 60 | } |