Initial Commit

src/main/java/icu/samnyan/aqua/sega/util/Compression.java

@@ -0,0 +1,57 @@
+package icu.samnyan.aqua.sega.util;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+
+import java.util.zip.DataFormatException;
+import java.util.zip.Deflater;
+import java.util.zip.Inflater;
+
+/**
+ * @author samnyan (privateamusement@protonmail.com)
+ */
+public class Compression {
+
+    public static byte[] decompress(byte[] src) {
+        ByteBuf result = Unpooled.buffer();
+        byte[] buffer = new byte[100];
+        Inflater decompressor = new Inflater();
+        decompressor.setInput(src);
+
+        try {
+            while (!decompressor.finished()) {
+                int count = decompressor.inflate(buffer);
+                if (count == 0) {
+                    break;
+                }
+                result.writeBytes(buffer, result.readerIndex(), count);
+            }
+            decompressor.end();
+
+            return ByteBufUtil.toBytes(result);
+        } catch (DataFormatException e) {
+            e.printStackTrace();
+            return new byte[0];
+        }
+
+    }
+
+    public static byte[] compress(byte[] src) {
+        ByteBuf result = Unpooled.buffer();
+        byte[] buffer = new byte[100];
+        Deflater compressor = new Deflater();
+        compressor.setInput(src);
+        compressor.finish();
+
+        while (!compressor.finished()) {
+            int count = compressor.deflate(buffer);
+            if (count == 0) {
+                break;
+            }
+            result.writeBytes(buffer, result.readerIndex(), count);
+        }
+        compressor.end();
+
+        return ByteBufUtil.toBytes(result);
+    }
+}