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/**
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* Back 2 Browser Bytecode Translator
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* Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. Look for COPYING file in the top folder.
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* If not, see http://opensource.org/licenses/GPL-2.0.
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*/
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package org.apidesign.bck2brwsr.emul.lang;
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import java.io.Closeable;
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import java.io.IOException;
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import java.lang.reflect.Method;
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import org.apidesign.bck2brwsr.core.Exported;
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import org.apidesign.bck2brwsr.core.JavaScriptBody;
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/**
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*
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* @author Jaroslav Tulach <jtulach@netbeans.org>
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*/
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@Exported
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public class System {
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private System() {
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}
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@JavaScriptBody(args = { "value", "srcBegin", "dst", "dstBegin", "count" }, body =
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"if (srcBegin < dstBegin) {\n" +
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" while (count-- > 0) {\n" +
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" dst[dstBegin + count] = value[srcBegin + count];\n" +
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" }\n" +
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"} else {\n" +
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" while (count-- > 0) {\n" +
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" dst[dstBegin++] = value[srcBegin++];\n" +
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" }\n" +
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"}"
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)
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public static void arraycopy(Object src, int srcBegin, Object dst, int dstBegin, int count) {
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try {
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Class<?> system = Class.forName("java.lang.System");
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Method m = system.getMethod("arraycopy", Object.class, int.class, Object.class, int.class, int.class);
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m.invoke(null, src, srcBegin, dst, dstBegin, count);
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} catch (Exception ex) {
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throw new IllegalStateException(ex);
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}
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}
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@JavaScriptBody(args = { "arr", "expectedSize" }, body =
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"while (expectedSize > arr.length) { arr.push(0); }; return arr;"
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)
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public static native byte[] expandArray(byte[] arr, int expectedSize);
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@JavaScriptBody(args = { "arr", "expectedSize" }, body =
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"while (expectedSize > arr.length) { arr.push(0); }; return arr;"
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)
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public static native char[] expandArray(char[] arr, int expectedSize);
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@JavaScriptBody(args = {}, body = "return new Date().getTime();")
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private static native double currentTimeMillisDouble();
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public static long currentTimeMillis() {
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return (long) currentTimeMillisDouble();
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}
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public static long nanoTime() {
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return 1000000L * currentTimeMillis();
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}
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@JavaScriptBody(args = { "obj" }, body="return vm.java_lang_Object(false).hashCode__I.call(obj);")
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public static native int identityHashCode(Object obj);
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public static Closeable activate() {
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return DUMMY;
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}
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private static final Closeable DUMMY = new Closeable() {
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@Override
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public void close() throws IOException {
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}
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};
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@JavaScriptBody(args = { "fn", "p" }, body = "return fn(p);")
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private static native Object invoke(Object fn, Object p);
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@Exported
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private static Object convArray(Object o, Object convToJS) {
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if (o instanceof Object[]) {
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Object[] arr = (Object[]) o;
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final int l = arr.length;
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Object[] ret = new Object[l];
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for (int i = 0; i < l; i++) {
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ret[i] = invoke(convToJS, arr[i]);
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}
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return ret;
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}
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return o;
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}
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}
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