/**

  * Back 2 Browser Bytecode Translator

  * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>

  *

  * This program is free software: you can redistribute it and/or modify

  * it under the terms of the GNU General Public License as published by

  * the Free Software Foundation, version 2 of the License.

  *

  * This program is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  * GNU General Public License for more details.

  *

  * You should have received a copy of the GNU General Public License

  * along with this program. Look for COPYING file in the top folder.

  * If not, see http://opensource.org/licenses/GPL-2.0.

  */

 package org.apidesign.vm4brwsr;

 import java.io.ByteArrayInputStream;

 import java.io.DataInputStream;

 import java.io.IOException;

 /**

  *

  * @author Jaroslav Tulach <jtulach@netbeans.org>

  */

 public class Numbers {

     private static Double autoboxDbl() {

         return 3.3;

     }

     public static String autoboxDblToString() {

         return autoboxDbl().toString().toString();

     }

     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 double deserDouble() throws IOException {

         byte[] arr = {(byte)64, (byte)8, (byte)0, (byte)0, (byte)0, (byte)0, (byte)0, (byte)0};

         ByteArrayInputStream is = new ByteArrayInputStream(arr);

         DataInputStream dis = new DataInputStream(is);

         return dis.readDouble();

     }

     static long deserLong(byte[] arr) throws IOException {

         ByteArrayInputStream is = new ByteArrayInputStream(arr);

         DataInputStream dis = new DataInputStream(is);

         return dis.readLong();

     }

     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();

     }

     static String intToString() {

         return new Integer(5).toString().toString();

     }

     static String floatToString() {

         return new Float(7.0).toString().toString();

     }

     public static long shlL(byte[] arrValue, int nBits) throws IOException {

         ByteArrayInputStream isValue = new ByteArrayInputStream(arrValue);

         DataInputStream disValue = new DataInputStream(isValue);

         return (disValue.readLong() << nBits);

     }

     public static long shrL(byte[] arrValue, int nBits) throws IOException {

         ByteArrayInputStream isValue = new ByteArrayInputStream(arrValue);

         DataInputStream disValue = new DataInputStream(isValue);

         return (disValue.readLong() >> nBits);

     }

     public static long ushrL(byte[] arrValue, int nBits) throws IOException {

         ByteArrayInputStream isValue = new ByteArrayInputStream(arrValue);

         DataInputStream disValue = new DataInputStream(isValue);

         return (disValue.readLong() >>> nBits);

     }

     public static long andL(byte[] arrX, byte[] arrY) throws IOException {

         ByteArrayInputStream isX = new ByteArrayInputStream(arrX);

         DataInputStream disX = new DataInputStream(isX);

         ByteArrayInputStream isY = new ByteArrayInputStream(arrY);

         DataInputStream disY = new DataInputStream(isY);

         return (disX.readLong() & disY.readLong());

     }

     public static long orL(byte[] arrX, byte[] arrY) throws IOException {

         ByteArrayInputStream isX = new ByteArrayInputStream(arrX);

         DataInputStream disX = new DataInputStream(isX);

         ByteArrayInputStream isY = new ByteArrayInputStream(arrY);

         DataInputStream disY = new DataInputStream(isY);

         return (disX.readLong() | disY.readLong());

     }

     public static long xorL(byte[] arrX, byte[] arrY) throws IOException {

         ByteArrayInputStream isX = new ByteArrayInputStream(arrX);

         DataInputStream disX = new DataInputStream(isX);

         ByteArrayInputStream isY = new ByteArrayInputStream(arrY);

         DataInputStream disY = new DataInputStream(isY);

         return (disX.readLong() ^ disY.readLong());

     }

     public static int compareL(byte[] arrX, byte[] arrY,

                                int zero) throws IOException {

         ByteArrayInputStream isX = new ByteArrayInputStream(arrX);

         DataInputStream disX = new DataInputStream(isX);

         ByteArrayInputStream isY = new ByteArrayInputStream(arrY);

         DataInputStream disY = new DataInputStream(isY);

         final long x = disX.readLong();

         final long y = disY.readLong();

         final int xyResult = compareL(x, y, zero);

         final int yxResult = compareL(y, x, zero);

         return ((xyResult + yxResult) == 0) ? xyResult : -2;

     }

     private static int compareL(long x, long y, int zero) {

         int result = -2;

         int trueCount = 0;

         x += zero;

         if (x == y) {

             result = 0;

             ++trueCount;

         }

         x += zero;

         if (x < y) {

             result = -1;

             ++trueCount;

         }

         x += zero;

         if (x > y) {

             result = 1;

             ++trueCount;

         }

         return (trueCount == 1) ? result : -2;

     }

 }