- [Core] Remove K4os.Compression.LZ4

AssetStudio/Crypto/FairGuardUtils.cs

@@ -232,74 +232,5 @@ namespace AssetStudio
                 data[iteration] ^= (byte)(k - 0x61);
             }
         }
-
-        public static class Lz4
-        {
-            public static void Decompress(ReadOnlySpan<byte> cmp, Span<byte> dec)
-            {
-                int cmpPos = 0;
-                int decPos = 0;
-
-                // ReSharper disable once VariableHidesOuterVariable
-                int GetLength(int length, ReadOnlySpan<byte> cmp)
-                {
-                    byte sum;
-
-                    if (length == 0xf)
-                    {
-                        do
-                        {
-                            length += sum = cmp[cmpPos++];
-                        } while (sum == 0xff);
-                    }
-
-                    return length;
-                }
-
-                do
-                {
-                    byte token = cmp[cmpPos++];
-
-                    int encCount = (token >> 4) & 0xf;
-                    int litCount = (token >> 0) & 0xf;
-
-                    //Copy literal chunk
-                    litCount = GetLength(litCount, cmp);
-
-                    cmp.Slice(cmpPos, litCount).CopyTo(dec.Slice(decPos));
-
-                    cmpPos += litCount;
-                    decPos += litCount;
-
-                    if (cmpPos >= cmp.Length)
-                    {
-                        break;
-                    }
-
-                    //Copy compressed chunk
-                    int back = cmp[cmpPos++] << 8 |
-                               cmp[cmpPos++] << 0;
-
-                    encCount = GetLength(encCount, cmp) + 4;
-
-                    int encPos = decPos - back;
-
-                    if (encCount <= back)
-                    {
-                        dec.Slice(encPos, encCount).CopyTo(dec.Slice(decPos));
-
-                        decPos += encCount;
-                    }
-                    else
-                    {
-                        while (encCount-- > 0)
-                        {
-                            dec[decPos++] = dec[encPos++];
-                        }
-                    }
-                } while (cmpPos < cmp.Length &&
-                         decPos < dec.Length);
-            }
-        }
     }
 }