Implement character talents

src/main/java/emu/nebula/util/Bitset.java

@@ -0,0 +1,56 @@
+package emu.nebula.util;
+
+import lombok.Getter;
+
+@Getter
+public class Bitset {
+    private long[] data;
+    
+    public Bitset() {
+        this.data = new long[1];
+    }
+    
+    public Bitset(long[] longArray) {
+        this.data = longArray;
+    }
+    
+    public boolean isSet(int index) {
+        int longArrayOffset = (int) Math.floor((index - 1) / 64D);
+        int bytePosition = ((index - 1) % 64);
+        
+        if (longArrayOffset >= this.data.length) {
+            return false;
+        }
+        
+        long flag = 1L << bytePosition;
+        return (this.data[longArrayOffset] & flag) == flag;
+    }
+
+    public void setBit(int index) {
+        int longArrayOffset = (int) Math.floor((index - 1) / 64D);
+        int bytePosition = ((index - 1) % 64);
+        
+        if (longArrayOffset >= this.data.length) {
+            var oldData = this.data;
+            this.data = new long[longArrayOffset + 1];
+            System.arraycopy(oldData, 0, this.data, 0, oldData.length);
+        }
+        
+        this.data[longArrayOffset] |= (1L << bytePosition);
+    }
+    
+    public byte[] toByteArray() {
+        byte[] array = new byte[this.getData().length * 8];
+
+        for (int i = 0; i < this.getData().length; i++) {
+            long value = this.getData()[i];
+            
+            for (int x = 7; x >= 0; x--) {
+                array[(i * 8) + x] = (byte) (value & 0xFF);
+                value >>= Byte.SIZE;
+            }
+        }
+        
+        return array;
+    }
+}