1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/vm/src/main/java/org/apidesign/vm4brwsr/Zips.java	Fri Feb 01 18:42:07 2013 +0100
     1.3 @@ -0,0 +1,97 @@
     1.4 +/**
     1.5 + * Back 2 Browser Bytecode Translator
     1.6 + * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
     1.7 + *
     1.8 + * This program is free software: you can redistribute it and/or modify
     1.9 + * it under the terms of the GNU General Public License as published by
    1.10 + * the Free Software Foundation, version 2 of the License.
    1.11 + *
    1.12 + * This program is distributed in the hope that it will be useful,
    1.13 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.14 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1.15 + * GNU General Public License for more details.
    1.16 + *
    1.17 + * You should have received a copy of the GNU General Public License
    1.18 + * along with this program. Look for COPYING file in the top folder.
    1.19 + * If not, see http://opensource.org/licenses/GPL-2.0.
    1.20 + */
    1.21 +package org.apidesign.vm4brwsr;
    1.22 +
    1.23 +import java.io.IOException;
    1.24 +import java.net.URL;
    1.25 +import java.util.zip.ZipEntry;
    1.26 +import java.util.zip.ZipInputStream;
    1.27 +import org.apidesign.bck2brwsr.core.JavaScriptBody;
    1.28 +
    1.29 +/** Conversion from classpath to load function.
    1.30 + *
    1.31 + * @author Jaroslav Tulach <jtulach@netbeans.org>
    1.32 + */
    1.33 +final class Zips {
    1.34 +    private Zips() {
    1.35 +    }
    1.36 +    
    1.37 +    public static void init() {
    1.38 +    }
    1.39 +    
    1.40 +    public static byte[] loadFromCp(Object[] classpath, String res) {
    1.41 +        for (int i = 0; i < classpath.length; i++) {
    1.42 +            Object c = classpath[i];
    1.43 +            if (c instanceof String) {
    1.44 +                try {
    1.45 +                    c = classpath[i] = toZip((String)c);
    1.46 +                } catch (IOException ex) {
    1.47 +                    classpath[i] = ex;
    1.48 +                }
    1.49 +            }
    1.50 +            if (c instanceof Zips) {
    1.51 +                Object checkRes = ((Zips)c).findRes(res);
    1.52 +                if (checkRes instanceof byte[]) {
    1.53 +                    return (byte[])checkRes;
    1.54 +                }
    1.55 +            }
    1.56 +        }
    1.57 +        return null;
    1.58 +    }
    1.59 +
    1.60 +    @JavaScriptBody(args = { "res" }, body = "var r = this[res]; return r ? r : null;")
    1.61 +    private native byte[] findRes(String res);
    1.62 +
    1.63 +    @JavaScriptBody(args = { "res", "arr" }, body = "this[res] = arr;")
    1.64 +    private native void putRes(String res, byte[] arr);
    1.65 +    
    1.66 +    private static Zips toZip(String path) throws IOException {
    1.67 +        URL u = new URL(path);
    1.68 +        ZipInputStream zip = new ZipInputStream(u.openStream());
    1.69 +        Zips z = new Zips();
    1.70 +        for (;;) {
    1.71 +            ZipEntry entry = zip.getNextEntry();
    1.72 +            if (entry == null) {
    1.73 +                break;
    1.74 +            }
    1.75 +            byte[] arr = new byte[4096];
    1.76 +            int offset = 0;
    1.77 +            for (;;) {
    1.78 +                int len = zip.read(arr, offset, arr.length - offset);
    1.79 +                if (len == -1) {
    1.80 +                    break;
    1.81 +                }
    1.82 +                offset += len;
    1.83 +                if (offset == arr.length) {
    1.84 +                    enlargeArray(arr, arr.length + 4096);
    1.85 +                }
    1.86 +            }
    1.87 +            sliceArray(arr, offset);
    1.88 +            z.putRes(entry.getName(), arr);
    1.89 +        }
    1.90 +        return z;
    1.91 +    }
    1.92 +
    1.93 +    @JavaScriptBody(args = { "arr", "len" }, body = "while (arr.length < len) arr.push(0);")
    1.94 +    private static native void enlargeArray(byte[] arr, int len);
    1.95 +
    1.96 +    @JavaScriptBody(args = { "arr", "len" }, body = "arr.splice(len, arr.length - len);")
    1.97 +    private static native void sliceArray(byte[] arr, int len);
    1.98 +    
    1.99 +    
   1.100 +}