/**

  * 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 org.apidesign.bck2brwsr.core.JavaScriptBody;

 /**

  *

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

  */

 public class StaticMethod {

     public static final int MISSING_CONSTANT = 1;

     private static int cnt;

     private static Object NULL;

     public static int minusOne() {

         return -1;

     }

     public static Object none(int x, int y) {

         Object toRet = null;

         for (int i = x; i < y; i++) {

             if (i == 2) {

                 toRet = null;

             } else {

                 toRet = new Object();

             }

         }

         return toRet;

     }

     public static boolean isNull() {

         return NULL == null;

     }

     public static int sum(int x, int y) {

         return x + y;

     }

     public static float power(float x) {

         return x * x;

     }

     public static double minus(double x, long y) {

         return x - y;

     }

     public static int div(byte c, double d) {

         return (int)(d / c);

     }

     public static int mix(int a, long b, byte c, double d) {

         return (int)((b / a + c) * d);

     }

     public static long xor(int a, long b) {

         return a ^ b;

     }

     public static long orOrAnd(boolean doOr, int a, int b) {

         return doOr ? a | b : a & b;

     }

     public static int shiftLeft(int what, int much) {

         return what << much;

     }

     public static int shiftArithmRight(int what, int much, boolean signed) {

         if (signed) {

             return what >> much;

         } else {

             return what >>> much;

         }

     }

     public static long factRec(int n) {

         if (n <= 1) {

             return 1;

         } else {

             return n * factRec(n - MISSING_CONSTANT);

         }

     }

     public static long factIter(int n) {

         long res = 1;

         for (int i = 2; i <= n; i++) {

             res *= i;

         }

         return res;

     }

     public static int inc4() {

         cnt++;

         cnt+=2;

         cnt++;

         return cnt;

     }

     @JavaScriptBody(

         args={"i","j"}, body="\n\r\treturn (i + j).toString();"

     )

     public static String i2s(int i, int j) {

         throw new IllegalStateException();

     }

     public static String castNull(boolean n) {

         Object value = n ? null : "Ahoj";

         return (String)value;

     }

     public static String swtch(int what) {

         switch (what) {

             case 0: return "Jarda";

             case 1: return "Darda";

             case 2: return "Parda";

             default: return "Marda";

         }

     }

     public static String swtch2(int what) {

         switch (what) {

             case 0: return "Jarda";

             case 11: return "Darda";

             case 22: return "Parda";

             default: return "Marda";

         }

     }

     public static int castString(Object o) {

         return ((String)o).length();

     }

     public static int initInflater(int w, boolean nowrap) {

         Instance i = new Instance(w, 0.0);

         return i.sum(nowrap?-w:w, 1);

     }

     public static String toStringArr() {

         class N implements Next {

             int idx = 0;

             @Override

             public boolean hasNext() {

                 return idx < 5;

             }

             @Override

             public String next() {

                 switch (idx++) {

                     case 0: return "Zero";

                     case 1: return "One";

                     case 2: return "Two";

                     case 3: return "Three";

                     case 4: return "Four";

                 }

                 throw new IllegalStateException();

             }

         }

         return toString(null, new N()).toString();

     }

     static String toString(Object thiz, Next it) {

         if (!it.hasNext()) {

             return "[]";

         }

         StringBuilder sb = new StringBuilder();

         sb.append('[');

         for (;;) {

             String e = it.next();

             sb.append(e == thiz ? "(this Collection)" : e);

             if (!it.hasNext()) {

                 return sb.append(']').toString();

             }

             sb.append(',').append(' ');

         }

     }

     static interface Next {

         boolean hasNext();

         String next();

     }

     static {

         // check order of initializers

         StaticUse.NON_NULL.equals(new Object());

     }

 }