FPA API: numerals, .NET and Java

Signed-off-by: Christoph M. Wintersteiger <cwinter@microsoft.com>

src/api/java/FPNum.java

@@ -0,0 +1,86 @@
+/*++
+Copyright (c) 2013 Microsoft Corporation
+
+Module Name:
+
+    FPNum.java
+
+Abstract:
+
+Author:
+
+    Christoph Wintersteiger (cwinter) 2013-06-10
+
+Notes:
+    
+--*/
+package com.microsoft.z3;
+
+/**
+ * FloatingPoint Numerals
+ */
+public class FPNum extends FPExpr
+{
+	/**
+	 * Retrieves the sign of a floating-point literal	 
+     * Remarks: returns true if the numeral is negative 
+	 * @throws Z3Exception 
+     */
+    public boolean getSign() throws Z3Exception {
+    	Native.IntPtr res = new Native.IntPtr();
+        if (Native.fpaGetNumeralSign(getContext().nCtx(), getNativeObject(), res) ^ true)                
+            throw new Z3Exception("Sign is not a Boolean value");
+        return res.value != 0;
+        
+        
+    }
+
+    /**
+     * The significand value of a floating-point numeral as a string
+     * Remarks: The significand s is always 0 < s < 2.0; the resulting string is long
+     * enough to represent the real significand precisely.
+     * @throws Z3Exception 
+     **/
+    public String getSignificand() throws Z3Exception {
+        return Native.fpaGetNumeralSignificandString(getContext().nCtx(), getNativeObject());
+    }
+
+    /**
+     * Return the exponent value of a floating-point numeral as a string
+     * @throws Z3Exception 
+     */
+    public String getExponent() throws Z3Exception {
+        return Native.fpaGetNumeralExponentString(getContext().nCtx(), getNativeObject());
+    }
+
+    /**
+     * Return the exponent value of a floating-point numeral as a signed 64-bit integer
+     * @throws Z3Exception 
+     */
+    public long getExponentInt64() throws Z3Exception  {
+        Native.LongPtr res = new Native.LongPtr();
+        if (Native.fpaGetNumeralExponentInt64(getContext().nCtx(), getNativeObject(), res) ^ true)
+            throw new Z3Exception("Exponent is not a 64 bit integer");
+        return res.value;
+    }
+    
+    public FPNum(Context ctx, long obj) throws Z3Exception
+    {
+        super(ctx, obj);
+    }
+    
+    /**
+     * Returns a string representation of the numeral.
+     */           
+    public String toString()
+    {
+        try
+        {
+            return Native.getNumeralString(getContext().nCtx(), getNativeObject());
+        } catch (Z3Exception e)
+        {
+            return "Z3Exception: " + e.getMessage();
+        }
+    }
+
+}