# HG changeset patch
# User Jaroslav Tulach <jaroslav.tulach@apidesign.org>
# Date 1353229223 -3600
# Node ID f426de5dc7f6329a9d78e894de5a0af6c78c1f69
# Parent  23d9144d8f452859bd30da48fece38647ddb7e4f
Can deserialize float

diff -r 23d9144d8f45 -r f426de5dc7f6 emul/src/main/java/java/lang/Float.java
--- a/emul/src/main/java/java/lang/Float.java	Sun Nov 18 08:58:16 2012 +0100
+++ b/emul/src/main/java/java/lang/Float.java	Sun Nov 18 10:00:23 2012 +0100
@@ -819,6 +819,18 @@
      * @return  the {@code float} floating-point value with the same bit
      *          pattern.
      */
+    @JavaScriptBody(args = "bits",
+        body = 
+          "if (bits === 0x7f800000) return Number.POSITIVE_INFINITY;\n"
+        + "if (bits === 0xff800000) return Number.NEGATIVE_INFINITY;\n"
+        + "if (bits >= 0x7f800001 && bits <= 0xffffffff) return Number.NaN;\n"
+        + "var s = ((bits >> 31) == 0) ? 1 : -1;\n"
+        + "var e = ((bits >> 23) & 0xff);\n"
+        + "var m = (e == 0) ?\n"
+        + "  (bits & 0x7fffff) << 1 :\n"
+        + "  (bits & 0x7fffff) | 0x800000;\n"
+        + "return s * m * Math.pow(2.0, e - 150);\n"
+    )
     public static native float intBitsToFloat(int bits);
 
     /**
diff -r 23d9144d8f45 -r f426de5dc7f6 vm/src/test/java/org/apidesign/vm4brwsr/NumberTest.java
--- a/vm/src/test/java/org/apidesign/vm4brwsr/NumberTest.java	Sun Nov 18 08:58:16 2012 +0100
+++ b/vm/src/test/java/org/apidesign/vm4brwsr/NumberTest.java	Sun Nov 18 10:00:23 2012 +0100
@@ -64,6 +64,26 @@
             Double.valueOf(3.0), 303, 10
         );
     }
+    
+    @Test public void deserializeInt() throws Exception {
+        int exp = Numbers.deserInt();
+        assertExec("Should be the same", "org_apidesign_vm4brwsr_Numbers_deserIntI", 
+            Double.valueOf(exp)
+        );
+    }
+    
+    @Test public void deserializeFloatInJava() throws Exception {
+        float f = 54324.32423f;
+        float r = Numbers.deserFloat();
+        assertEquals(r, f, "Floats are the same");
+    }
+    
+    @Test public void deserializeFloatInJS() throws Exception {
+        float f = 54324.32423f;
+        assertExec("Should be the same", "org_apidesign_vm4brwsr_Numbers_deserFloatF", 
+            Double.valueOf(f)
+        );
+    }
 
     
     private static CharSequence codeSeq;
diff -r 23d9144d8f45 -r f426de5dc7f6 vm/src/test/java/org/apidesign/vm4brwsr/Numbers.java
--- a/vm/src/test/java/org/apidesign/vm4brwsr/Numbers.java	Sun Nov 18 08:58:16 2012 +0100
+++ b/vm/src/test/java/org/apidesign/vm4brwsr/Numbers.java	Sun Nov 18 10:00:23 2012 +0100
@@ -17,6 +17,10 @@
  */
 package org.apidesign.vm4brwsr;
 
+import java.io.ByteArrayInputStream;
+import java.io.DataInputStream;
+import java.io.IOException;
+
 /**
  *
  * @author Jaroslav Tulach <jtulach@netbeans.org>
@@ -31,4 +35,19 @@
     public static int rem(int a, int b) {
         return a % b;
     }
+
+    static float deserFloat() throws IOException {
+        byte[] arr = {(byte) 71, (byte) 84, (byte) 52, (byte) 83};
+        ByteArrayInputStream is = new ByteArrayInputStream(arr);
+        DataInputStream dis = new DataInputStream(is);
+        float r = dis.readFloat();
+        return r;
+    }
+    static int deserInt() throws IOException {
+        byte[] arr = {(byte) 71, (byte) 84, (byte) 52, (byte) 83};
+        ByteArrayInputStream is = new ByteArrayInputStream(arr);
+        DataInputStream dis = new DataInputStream(is);
+        return dis.readInt();
+    }
+    
 }