/**

  * 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.bck2brwsr.tck;

 import org.apidesign.bck2brwsr.core.JavaScriptBody;

 import org.apidesign.bck2brwsr.vmtest.Compare;

 import org.apidesign.bck2brwsr.vmtest.VMTest;

 import org.testng.annotations.Factory;

 /**

  *

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

  */

 public class ByteArithmeticTest {

     private static byte add(byte x, byte y) {

         return (byte)(x + y);

     }

     private static byte sub(byte x, byte y) {

         return (byte)(x - y);

     }

     private static byte mul(byte x, byte y) {

         return (byte)(x * y);

     }

     private static byte div(byte x, byte y) {

         return (byte)(x / y);

     }

     private static byte mod(byte x, byte y) {

         return (byte)(x % y);

     }

     @Compare public byte conversion() {

         return (byte)123456;

     }

     @Compare public byte addOverflow() {

         return add(Byte.MAX_VALUE, (byte)1);

     }

     @Compare public byte subUnderflow() {

         return sub(Byte.MIN_VALUE, (byte)1);

     }

     @Compare public byte addMaxByteAndMaxByte() {

         return add(Byte.MAX_VALUE, Byte.MAX_VALUE);

     }

     @Compare public byte subMinByteAndMinByte() {

         return sub(Byte.MIN_VALUE, Byte.MIN_VALUE);

     }

     @Compare public byte multiplyMaxByte() {

         return mul(Byte.MAX_VALUE, (byte)2);

     }

     @Compare public byte multiplyMaxByteAndMaxByte() {

         return mul(Byte.MAX_VALUE, Byte.MAX_VALUE);

     }

     @Compare public byte multiplyMinByte() {

         return mul(Byte.MIN_VALUE, (byte)2);

     }

     @Compare public byte multiplyMinByteAndMinByte() {

         return mul(Byte.MIN_VALUE, Byte.MIN_VALUE);

     }

     @Compare public byte multiplyPrecision() {

         return mul((byte)17638, (byte)1103);

     }

     @Compare public byte division() {

         return div((byte)1, (byte)2);

     }

     @Compare public byte divisionReminder() {

         return mod((byte)1, (byte)2);

     }

     private static int readShort(byte[] byteCodes, int offset) {

         int signed = byteCodes[offset];

         byte b0 = (byte)signed;

         return (b0 << 8) | (byteCodes[offset + 1] & 0xff);

     }

     private static int readShortArg(byte[] byteCodes, int offsetInstruction) {

         return readShort(byteCodes, offsetInstruction + 1);

     }

     @Compare public int readIntArgs255and156() {

         final byte[] arr = new byte[] { (byte)0, (byte)255, (byte)156 };

         assert arr[1] == -1 : "First byte: " + arr[1];

         assert arr[2] == -100 : "Second byte: " + arr[2];

         final int ret = readShortArg(arr, 0);

         assert ret < 65000: "Value: " + ret;

         return ret;

     }

     @JavaScriptBody(args = { "arr" }, body = "arr[1] = 255; arr[2] = 156; return arr;")

     private static byte[] fill255and156(byte[] arr) {

         arr[1] = (byte)255;

         arr[2] = (byte)156;

         return arr;

     }

     @Compare public int readIntArgs255and156JSArray() {

         final byte[] arr = fill255and156(new byte[] { 0, 0, 0 });

         final int ret = readShortArg(arr, 0);

         assert ret < 65000: "Value: " + ret;

         return ret;

     }

     @Compare public int readIntArgsMinus1andMinus100() {

         final byte[] arr = new byte[] { (byte)0, (byte)-1, (byte)-100 };

         assert arr[1] == -1 : "First byte: " + arr[1];

         assert arr[2] == -100 : "Second byte: " + arr[2];

         return readShortArg(arr, 0);

     }

     @Factory

     public static Object[] create() {

         return VMTest.create(ByteArithmeticTest.class);

     }

 }