Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging
[qemu/ar7.git] / block / dmg-lzfse.c
blob19d25bc6466a7987a4d3ebf06f14480cd10a9a82
1 /*
2 * DMG lzfse uncompression
4 * Copyright (c) 2018 Julio Cesar Faracco
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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.
24 #include "qemu/osdep.h"
25 #include "qemu-common.h"
26 #include "dmg.h"
27 #include <lzfse.h>
29 static int dmg_uncompress_lzfse_do(char *next_in, unsigned int avail_in,
30 char *next_out, unsigned int avail_out)
32 size_t out_size = lzfse_decode_buffer((uint8_t *) next_out, avail_out,
33 (uint8_t *) next_in, avail_in,
34 NULL);
36 /* We need to decode the single chunk only. */
37 /* So, out_size == avail_out is not an error here. */
38 if (out_size > 0) {
39 return out_size;
41 return -1;
44 __attribute__((constructor))
45 static void dmg_lzfse_init(void)
47 assert(!dmg_uncompress_lzfse);
48 dmg_uncompress_lzfse = dmg_uncompress_lzfse_do;