dmg-bz2.c (2130B)
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 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 }