1 files changed, 66 insertions, 0 deletions
diff --git a/src/jcgp/backend/function/UnsignedInteger.java b/src/jcgp/backend/function/UnsignedInteger.java
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+++ b/src/jcgp/backend/function/UnsignedInteger.java
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+package jcgp.backend.function;
+
+/**
+ * Integer wrapper type for unsigned integer values. 
+ * <br><br>
+ * Java offers no support for unsigned types save from 
+ * unsigned conversion methods. This class uses those methods
+ * to simulate the unsigned int data type, useful for circuit 
+ * truth table encodings.
+ * <br><br>
+ * When a string representation of an unsigned integer is parsed
+ * using Integer.parseUnsignedInt(), an Integer is created using
+ * all 32 bits for unsigned magnitude. The integer however is still
+ * signed and will behave as such for all arithmetic operations.
+ * Bitwise operations can still be performed as they work at the bit
+ * level, making this data type particularly suitable for circuit design. 
+ * 
+ * 
+ * @author Eduardo Pedroni
+ * @see Integer
+ *
+ */
+public class UnsignedInteger {
+	
+	private Integer value;
+	
+	/**
+	 * Makes a new instance of UnsignedInteger with a specified value.
+	 * 
+	 * @param i the value with which to initialise
+	 */
+	public UnsignedInteger(int i) {
+		value = new Integer(i);
+	}
+	
+	/**
+	 * Makes a new instance of UnsignedInteger with a specified value.
+	 * 
+	 * @param i the value with which to initialise
+	 */
+	public UnsignedInteger(Integer i) {
+		value = i;
+	}
+	
+	/**
+	 * Makes a new instance of UnsignedInteger from the string representation
+	 * of an unsigned integer.
+	 * 
+	 * @param i the string with which to initialise
+	 */
+	public UnsignedInteger(String i) {
+		value = Integer.parseUnsignedInt(i);
+	}
+	
+	/**
+	 * @return the wrapped Integer object
+	 */
+	public Integer get() {
+		return value;
+	}
+	
+	@Override
+	public String toString() {
+		return Integer.toUnsignedString(value);
+	}
+}