Initial revision

From-SVN: r26263

libjava/java/lang/Float.java

@@ -0,0 +1,149 @@
+/* Copyright (C) 1998, 1999  Cygnus Solutions
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+ 
+package java.lang;
+
+/**
+ * @author Andrew Haley <aph@cygnus.com>
+ * @date September 25, 1998.  
+ */
+/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
+ * "The Java Language Specification", ISBN 0-201-63451-1
+ * plus online API docs for JDK 1.2 beta from http://www.javasoft.com.
+ * Status:  Believed complete and correct.
+ */
+
+public final class Float extends Number
+{
+  public static final float MAX_VALUE = 3.4028235e+38f;
+  public static final float MIN_VALUE = 1.4e-45f;
+  public static final float NEGATIVE_INFINITY = -1.0f/0.0f;
+  public static final float POSITIVE_INFINITY = 1.0f/0.0f;
+  public static final float NaN = 0.0f/0.0f;
+
+  // This initialization is seemingly circular, but it is accepted
+  // by javac, and is handled specially by gcc.
+  public static final Class TYPE = float.class;
+
+  private float value;
+
+  public Float (float value)
+  {
+    this.value = value;
+  }
+
+  public Float (double value)
+  {
+    this.value = (float)value;
+  }
+
+  public Float (String s) throws NumberFormatException
+  {
+    this.value = valueOf (s).floatValue ();
+  }
+
+  public String toString ()
+  {
+    return toString (value);
+  }
+
+  public boolean equals (Object obj)
+  {
+    if (obj == null)
+      return false;
+
+    if (!(obj instanceof Float))
+      return false;
+
+    Float f = (Float) obj;
+
+    return floatToIntBits (value) == floatToIntBits (f.floatValue ());
+  }
+
+  public int hashCode ()
+  {
+    return floatToIntBits (value);
+  }
+
+  public int intValue ()
+  {
+    return (int) value;
+  }
+
+  public long longValue ()
+  {
+    return (long) value;
+  }
+
+  public float floatValue ()
+  {
+    return (float) value;
+  }
+
+  public double doubleValue ()
+  {
+    return (double) value;
+  }
+
+  public byte byteValue ()
+  {
+    return (byte) value;
+  }
+
+  public short shortValue ()
+  {
+    return (short) value;
+  }
+
+  public static String toString (float v)
+  {
+    return Double.toString ((double) v, true);
+  } 
+
+  public static Float valueOf (String s) throws NullPointerException, 
+    NumberFormatException
+  {
+    if (s == null)
+      throw new NullPointerException ();
+
+    return new Float (Double.valueOf (s).floatValue ());
+  }
+
+  public boolean isNaN ()
+  {
+    return isNaN (value);
+  }
+
+  public static boolean isNaN (float v)
+  {
+    int bits = floatToIntBits (v);
+    int e = bits & 0x7f800000;
+    int f = bits & 0x007fffff;
+
+    return e == 0x7f800000 && f != 0;
+  }
+
+  public boolean isInfinite ()
+  {
+    return isInfinite (value);
+  }
+
+  public static boolean isInfinite (float v)
+  {
+    int bits = floatToIntBits (v);
+    int f = bits & 0x7fffffff;
+
+    return f == 0x7f800000;
+  }
+
+  public static native int floatToIntBits (float value);
+
+  public static native float intBitsToFloat (int bits);
+
+}
+