non-working implementation of float and double.toString()

classpath/java-lang.cpp

@@ -69,3 +69,10 @@ Java_java_lang_System_doMapLibraryName(JNIEnv* e, jclass, jstring name)
   }
   return r;
 }
+
+extern "C" JNIEXPORT jint JNICALL
+Java_java_lang_Double_fillBufferWithDouble(JNIEnv *e, jclass me, jdouble val,
+					   jbyteArray buffer, jint bufferSize) {
+  if (e or me or val or buffer or bufferSize) return 0;
+  return 0;
+}

classpath/java/lang/Double.java

@@ -35,7 +35,9 @@ public final class Double extends Number {
   }
 
   public static String toString(double v) {
-    return "Double.toString: todo";
+    byte[] buffer = new byte[20];
+    int numChars = fillBufferWithDouble(v, buffer, 20);
+    return new String(buffer, 0, numChars, false);
   }
 
   public byte byteValue() {
@@ -67,6 +69,9 @@ public final class Double extends Number {
     throw new NumberFormatException(s);
   }
 
+  public static native int fillBufferWithDouble(double value, byte[] buffer,
+                                                int charCount);
+
   public static native long doubleToRawLongBits(double value);
 
   public static native double longBitsToDouble(long bits);

classpath/java/lang/StringBuilder.java

@@ -81,6 +81,15 @@ public class StringBuilder {
     return append(String.valueOf(v));
   }
 
+  public StringBuilder append(float v) {
+    return append(String.valueOf(v));
+  }
+
+  public StringBuilder append(double v) {
+    return append(String.valueOf(v));
+  }
+
+
   public char charAt(int i) {
     if (i < 0 || i >= length) {
       throw new IndexOutOfBoundsException();