1 | /* |
2 | Copyright (c) 2015-2016, Apple Inc. All rights reserved. |
3 | |
4 | Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: |
5 | |
6 | 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. |
7 | |
8 | 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer |
9 | in the documentation and/or other materials provided with the distribution. |
10 | |
11 | 3. Neither the name of the copyright holder(s) nor the names of any contributors may be used to endorse or promote products derived |
12 | from this software without specific prior written permission. |
13 | |
14 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
15 | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
16 | COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
17 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
18 | HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
19 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
20 | */ |
21 | |
22 | // LZFSE decode API |
23 | |
24 | #include "lzfse.h" |
25 | #include "lzfse_internal.h" |
26 | |
27 | size_t lzfse_decode_scratch_size() { return sizeof(lzfse_decoder_state); } |
28 | |
29 | size_t lzfse_decode_buffer(uint8_t *__restrict dst_buffer, size_t dst_size, |
30 | const uint8_t *__restrict src_buffer, |
31 | size_t src_size, void *__restrict scratch_buffer) { |
32 | lzfse_decoder_state *s = (lzfse_decoder_state *)scratch_buffer; |
33 | memset(s, 0x00, sizeof(*s)); |
34 | |
35 | // Initialize state |
36 | s->src = src_buffer; |
37 | s->src_begin = src_buffer; |
38 | s->src_end = s->src + src_size; |
39 | s->dst = dst_buffer; |
40 | s->dst_begin = dst_buffer; |
41 | s->dst_end = dst_buffer + dst_size; |
42 | |
43 | // Decode |
44 | int status = lzfse_decode(s); |
45 | if (status == LZFSE_STATUS_DST_FULL) |
46 | return dst_size; |
47 | if (status != LZFSE_STATUS_OK) |
48 | return 0; // failed |
49 | return (size_t)(s->dst - dst_buffer); // bytes written |
50 | } |
51 | |