dmg-lzfse.c (1898B)
1 /* 2 * DMG lzfse uncompression 3 * 4 * Copyright (c) 2018 Julio Cesar Faracco 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 #include "qemu/osdep.h" 25 #include "dmg.h" 26 #include <lzfse.h> 27 28 static int dmg_uncompress_lzfse_do(char *next_in, unsigned int avail_in, 29 char *next_out, unsigned int avail_out) 30 { 31 size_t out_size = lzfse_decode_buffer((uint8_t *) next_out, avail_out, 32 (uint8_t *) next_in, avail_in, 33 NULL); 34 35 /* We need to decode the single chunk only. */ 36 /* So, out_size == avail_out is not an error here. */ 37 if (out_size > 0) { 38 return out_size; 39 } 40 return -1; 41 } 42 43 __attribute__((constructor)) 44 static void dmg_lzfse_init(void) 45 { 46 assert(!dmg_uncompress_lzfse); 47 dmg_uncompress_lzfse = dmg_uncompress_lzfse_do; 48 }