Add binary converter to Utils

src/main/java/com/loomcom/symon/util/Utils.java

@@ -76,6 +76,16 @@ public class Utils {
                                            "F0", "F1", "F2", "F3", "F4", "F5", "F6", "F7",
                                            "F8", "F9", "FA", "FB", "FC", "FD", "FE", "FF"};
 
+    private static final String[] BIN_CONSTANTS = new String[256];
+
+    static {
+        for (int i = 0; i < 256; i++) {
+            String bin = Integer.toBinaryString(i);
+            // Left-pad to 8 digits with zeros
+            BIN_CONSTANTS[i] = "00000000".substring(bin.length()) + bin;
+        }
+    }
+
     /**
      * Very fast 8-bit int to ASCII conversion.
      *
@@ -116,4 +126,14 @@ public class Utils {
     public static int address(int lowByte, int hiByte) {
         return ((hiByte << 8) | lowByte) & 0xffff;
     }
+
+    /**
+     * Very fast 8-bit int to binary conversion, with zero-padded output.
+     *
+     * @param val The unsigned 8-bit value to convert to a zero padded binary string.
+     * @return Eight digit, zero padded binary string.
+     */
+    public static String byteToBin(int val) {
+        return BIN_CONSTANTS[val & 0xff];
+    }
 }