1 | sS decompressMozillaJSONLZ4File(File f) {
|
2 | byte[] data = loadBinaryFile(f); |
3 | if (empty(data)) null; |
4 | |
5 | int lDecompressed = intFromBytes_littleEndian(data, 8); |
6 | |
7 | // our very own LZ4 decompressor! |
8 | int i = 12, n = l(data), iOut = 0; |
9 | byte[] out = new byte[lDecompressed]; |
10 | while (i < n) {
|
11 | int lLiteral = (data[i] >> 4) & 0x0F; |
12 | int lMatches = (data[i] & 0x0F)+4; |
13 | i++; |
14 | if (lLiteral == 15) {
|
15 | int more; |
16 | do {
|
17 | more = data[i++] & 0xFF; |
18 | lLiteral += more; |
19 | } while (more == 255); |
20 | } |
21 | arraycopy(data, i, out, iOut, lLiteral); |
22 | iOut += lLiteral; |
23 | i += lLiteral; |
24 | if (i >= n) break; |
25 | int offset = data[i] & 0xFF | (data[i+1] & 0xFF) << 8; |
26 | i += 2; |
27 | if (offset == 0) fail("bad offset");
|
28 | if (lMatches == 19) {
|
29 | int more; |
30 | do {
|
31 | more = data[i++] & 0xFF; |
32 | lMatches += more; |
33 | } while (more == 255); |
34 | } |
35 | int j = lMatches; |
36 | while (j-- > 0) {
|
37 | out[iOut] = out[iOut-offset]; |
38 | iOut++; |
39 | } |
40 | } |
41 | ret fromUtf8(out); |
42 | } |
Began life as a copy of #1019807
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Travelled to 9 computer(s): bhatertpkbcr, cfunsshuasjs, gwrvuhgaqvyk, irmadwmeruwu, mqqgnosmbjvj, pyentgdyhuwx, pzhvpgtvlbxg, tvejysmllsmz, vouqrxazstgt
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| Snippet ID: | #1019811 |
| Snippet name: | decompressMozillaJSONLZ4File |
| Eternal ID of this version: | #1019811/1 |
| Text MD5: | 3add850dfee3b23296469bf93db66ba6 |
| Author: | stefan |
| Category: | javax / lz4 |
| Type: | JavaX fragment (include) |
| Public (visible to everyone): | Yes |
| Archived (hidden from active list): | No |
| Created/modified: | 2018-11-26 23:50:00 |
| Source code size: | 1067 bytes / 42 lines |
| Pitched / IR pitched: | No / No |
| Views / Downloads: | 345 / 361 |
| Referenced in: | [show references] |