jaroslav@644: /** jaroslav@644: * Back 2 Browser Bytecode Translator jaroslav@644: * Copyright (C) 2012 Jaroslav Tulach jaroslav@644: * jaroslav@644: * This program is free software: you can redistribute it and/or modify jaroslav@644: * it under the terms of the GNU General Public License as published by jaroslav@644: * the Free Software Foundation, version 2 of the License. jaroslav@644: * jaroslav@644: * This program is distributed in the hope that it will be useful, jaroslav@644: * but WITHOUT ANY WARRANTY; without even the implied warranty of jaroslav@644: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the jaroslav@644: * GNU General Public License for more details. jaroslav@644: * jaroslav@644: * You should have received a copy of the GNU General Public License jaroslav@644: * along with this program. Look for COPYING file in the top folder. jaroslav@644: * If not, see http://opensource.org/licenses/GPL-2.0. jaroslav@644: */ jaroslav@644: package org.apidesign.vm4brwsr; jaroslav@644: jaroslav@672: import java.io.ByteArrayInputStream; jaroslav@644: import java.io.IOException; jaroslav@706: import java.io.InputStream; jaroslav@644: import java.net.URL; jaroslav@644: import org.apidesign.bck2brwsr.core.JavaScriptBody; jaroslav@706: import org.apidesign.bck2brwsr.emul.zip.FastJar; jaroslav@644: jaroslav@644: /** Conversion from classpath to load function. jaroslav@644: * jaroslav@644: * @author Jaroslav Tulach jaroslav@644: */ jaroslav@644: final class Zips { jaroslav@706: private final FastJar fj; jaroslav@706: jaroslav@706: private Zips(String path, byte[] zipData) throws IOException { jaroslav@706: long bef = currentTimeMillis(); jaroslav@706: fj = new FastJar(zipData); jaroslav@706: for (FastJar.Entry e : fj.list()) { jaroslav@706: putRes(e.name, e); jaroslav@706: } jaroslav@706: log("Iterating thru " + path + " took " + (currentTimeMillis() - bef) + "ms"); jaroslav@644: } jaroslav@644: jaroslav@644: public static void init() { jaroslav@644: } jaroslav@644: jaroslav@702: public static byte[] loadFromCp(Object[] classpath, String res) throws Exception { jaroslav@644: for (int i = 0; i < classpath.length; i++) { jaroslav@644: Object c = classpath[i]; jaroslav@644: if (c instanceof String) { jaroslav@644: try { jaroslav@672: String url = (String)c; jaroslav@672: final Zips z = toZip(url); jaroslav@672: c = classpath[i] = z; jaroslav@672: final byte[] man = z.findRes("META-INF/MANIFEST.MF"); jaroslav@672: if (man != null) { jaroslav@702: String mainClass = processClassPathAttr(man, url, classpath); jaroslav@702: if (mainClass != null) { jaroslav@702: Class.forName(mainClass); jaroslav@702: } jaroslav@672: } jaroslav@702: } catch (Exception ex) { jaroslav@644: classpath[i] = ex; jaroslav@702: throw ex; jaroslav@644: } jaroslav@644: } jaroslav@702: if (res != null && c instanceof Zips) { jaroslav@644: Object checkRes = ((Zips)c).findRes(res); jaroslav@644: if (checkRes instanceof byte[]) { jaroslav@644: return (byte[])checkRes; jaroslav@644: } jaroslav@644: } jaroslav@644: } jaroslav@644: return null; jaroslav@644: } jaroslav@706: jaroslav@706: @JavaScriptBody(args = { "msg" }, body = "console.log(msg.toString());") jaroslav@706: private static native void log(String msg); jaroslav@706: jaroslav@706: private byte[] findRes(String res) throws IOException { jaroslav@706: Object arr = findResImpl(res); jaroslav@706: if (arr instanceof FastJar.Entry) { jaroslav@706: long bef = currentTimeMillis(); jaroslav@706: InputStream zip = fj.getInputStream((FastJar.Entry)arr); jaroslav@706: arr = readFully(new byte[512], zip); jaroslav@706: putRes(res, arr); jaroslav@706: log("Reading " + res + " took " + (currentTimeMillis() - bef) + "ms"); jaroslav@706: } jaroslav@706: return (byte[]) arr; jaroslav@706: } jaroslav@644: jaroslav@644: @JavaScriptBody(args = { "res" }, body = "var r = this[res]; return r ? r : null;") jaroslav@706: private native Object findResImpl(String res); jaroslav@644: jaroslav@644: @JavaScriptBody(args = { "res", "arr" }, body = "this[res] = arr;") jaroslav@706: private native void putRes(String res, Object arr); jaroslav@644: jaroslav@644: private static Zips toZip(String path) throws IOException { jaroslav@644: URL u = new URL(path); jaroslav@706: byte[] zipData = (byte[]) u.getContent(new Class[] { byte[].class }); jaroslav@706: return new Zips(path, zipData); jaroslav@644: } jaroslav@644: jaroslav@702: private static String processClassPathAttr(final byte[] man, String url, Object[] classpath) throws IOException { jaroslav@702: try (ParseMan is = new ParseMan(new ByteArrayInputStream(man))) { jaroslav@672: String cp = is.toString(); jaroslav@702: if (cp != null) { jaroslav@702: cp = cp.trim(); jaroslav@702: for (int p = 0; p < cp.length();) { jaroslav@702: int n = cp.indexOf(' ', p); jaroslav@702: if (n == -1) { jaroslav@702: n = cp.length(); jaroslav@702: } jaroslav@702: String el = cp.substring(p, n); jaroslav@702: URL u = new URL(new URL(url), el); jaroslav@702: classpath = addToArray(classpath, u.toString()); jaroslav@702: p = n + 1; jaroslav@702: } jaroslav@672: } jaroslav@702: return is.getMainClass(); jaroslav@672: } jaroslav@672: } jaroslav@672: jaroslav@672: private static Object[] addToArray(Object[] arr, String value) { jaroslav@672: final int last = arr.length; jaroslav@672: Object[] ret = enlargeArray(arr, last + 1); jaroslav@672: ret[last] = value; jaroslav@672: return ret; jaroslav@672: } jaroslav@672: jaroslav@672: @JavaScriptBody(args = { "arr", "len" }, body = "while (arr.length < len) arr.push(null); return arr;throw('Arr: ' + arr);") jaroslav@672: private static native Object[] enlargeArray(Object[] arr, int len); jaroslav@644: @JavaScriptBody(args = { "arr", "len" }, body = "while (arr.length < len) arr.push(0);") jaroslav@644: private static native void enlargeArray(byte[] arr, int len); jaroslav@644: jaroslav@644: @JavaScriptBody(args = { "arr", "len" }, body = "arr.splice(len, arr.length - len);") jaroslav@644: private static native void sliceArray(byte[] arr, int len); jaroslav@706: jaroslav@706: private static Object readFully(byte[] arr, InputStream zip) throws IOException { jaroslav@706: int offset = 0; jaroslav@706: for (;;) { jaroslav@706: int len = zip.read(arr, offset, arr.length - offset); jaroslav@706: if (len == -1) { jaroslav@706: break; jaroslav@706: } jaroslav@706: offset += len; jaroslav@706: if (offset == arr.length) { jaroslav@706: enlargeArray(arr, arr.length + 4096); jaroslav@706: } jaroslav@706: } jaroslav@706: sliceArray(arr, offset); jaroslav@706: return arr; jaroslav@706: } jaroslav@706: jaroslav@706: private static long currentTimeMillis() { jaroslav@706: return (long)m(); jaroslav@706: } jaroslav@706: @JavaScriptBody(args = { }, body = "return window.performance.now();") jaroslav@706: private static native double m(); jaroslav@644: jaroslav@644: jaroslav@644: }