diff options
author | 2015-01-11 08:10:25 +0100 | |
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committer | 2015-01-11 08:10:25 +0100 | |
commit | 6a23c2f3b766cf4fc7028628f76b5ff9396383f0 (patch) | |
tree | a01e16637118ae0c80f337119898bdf18f081e24 /3rdparty/lzma/Java/SevenZip/CRC.java | |
parent | 45ac9b351e0076c371de4c7453f59567b27b1cb6 (diff) |
Added full lzma sdk source (nw)
Diffstat (limited to '3rdparty/lzma/Java/SevenZip/CRC.java')
-rw-r--r-- | 3rdparty/lzma/Java/SevenZip/CRC.java | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/3rdparty/lzma/Java/SevenZip/CRC.java b/3rdparty/lzma/Java/SevenZip/CRC.java new file mode 100644 index 00000000000..c55e33cc1fd --- /dev/null +++ b/3rdparty/lzma/Java/SevenZip/CRC.java @@ -0,0 +1,52 @@ +// SevenZip/CRC.java + +package SevenZip; + +public class CRC +{ + static public int[] Table = new int[256]; + + static + { + for (int i = 0; i < 256; i++) + { + int r = i; + for (int j = 0; j < 8; j++) + if ((r & 1) != 0) + r = (r >>> 1) ^ 0xEDB88320; + else + r >>>= 1; + Table[i] = r; + } + } + + int _value = -1; + + public void Init() + { + _value = -1; + } + + public void Update(byte[] data, int offset, int size) + { + for (int i = 0; i < size; i++) + _value = Table[(_value ^ data[offset + i]) & 0xFF] ^ (_value >>> 8); + } + + public void Update(byte[] data) + { + int size = data.length; + for (int i = 0; i < size; i++) + _value = Table[(_value ^ data[i]) & 0xFF] ^ (_value >>> 8); + } + + public void UpdateByte(int b) + { + _value = Table[(_value ^ b) & 0xFF] ^ (_value >>> 8); + } + + public int GetDigest() + { + return _value ^ (-1); + } +} |