diff options
| -rw-r--r-- | block/dmg-lzfse.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/block/dmg-lzfse.c b/block/dmg-lzfse.c new file mode 100644 index 0000000000..19d25bc646 --- /dev/null +++ b/block/dmg-lzfse.c @@ -0,0 +1,49 @@ +/* + * DMG lzfse uncompression + * + * Copyright (c) 2018 Julio Cesar Faracco + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ +#include "qemu/osdep.h" +#include "qemu-common.h" +#include "dmg.h" +#include <lzfse.h> + +static int dmg_uncompress_lzfse_do(char *next_in, unsigned int avail_in, + char *next_out, unsigned int avail_out) +{ + size_t out_size = lzfse_decode_buffer((uint8_t *) next_out, avail_out, + (uint8_t *) next_in, avail_in, + NULL); + + /* We need to decode the single chunk only. */ + /* So, out_size == avail_out is not an error here. */ + if (out_size > 0) { + return out_size; + } + return -1; +} + +__attribute__((constructor)) +static void dmg_lzfse_init(void) +{ + assert(!dmg_uncompress_lzfse); + dmg_uncompress_lzfse = dmg_uncompress_lzfse_do; +} |