/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

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 */

/*

 * @test

 * @bug 6836682 7025988

 * @summary JavacFileManager handling of zip64 archives (Scenario A and B)

 * @compile  -XDignore.symbol.file T6836682.java Utils.java

 * @run main T6836682

 */

/*

 * This test consists of two scenarios:

 *

 * Scenario A: create a jar with entries exceeding 64K, and see if the javac

 * can handle this large jar on the classpath. Generally this test completes

 * within a minute

 *

 * Scenario B: create a jar with a large enough file exceeding 4GB, and

 * similarly test javac. This test is known to be slow and problematic on

 * certain operating systems, thus this test can be selected by passing a

 * property through jtreg as follows:

 * -javaoptions=-DT6836682.testScenarioB=true.

 * Note this test will only run iff all the disk requirements are met at runtime.

 */

import java.io.BufferedInputStream;

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.OutputStream;

import java.nio.file.Files;

import java.nio.file.Path;

import java.util.zip.CRC32;

import java.util.zip.ZipEntry;

import java.util.zip.ZipOutputStream;

public class T6836682 {

    private static final long GIGA = 1024 * 1024 * 1024;

    private static final int BUFFER_LEN = Short.MAX_VALUE * 2;

    static long getCount(long minlength) {

        return (minlength / BUFFER_LEN) + 1;

    }

    static long computeCRC(long minlength) {

        CRC32 crc = new CRC32();

        byte[] buffer = new byte[BUFFER_LEN];

        long count = getCount(minlength);

        for (long i = 0; i < count; i++) {

            crc.update(buffer);

        }

        return crc.getValue();

    }

    static long computeCRC(File inFile) throws IOException {

        byte[] buffer = new byte[8192];

        CRC32 crc = new CRC32();

        FileInputStream fis = null;

        BufferedInputStream bis = null;

        try {

            fis = new FileInputStream(inFile);

            bis = new BufferedInputStream(fis);

            int n = bis.read(buffer);

            while (n > 0) {

                crc.update(buffer, 0, n);

                n = bis.read(buffer);

            }

        } finally {

            Utils.close(bis);

            Utils.close(fis);

        }

        return crc.getValue();

    }

    static void createLargeFile(OutputStream os, long minlength) throws IOException {

        byte[] buffer = new byte[BUFFER_LEN];

        long count = getCount(minlength);

        for (long i = 0; i < count; i++) {

            os.write(buffer);

        }

        os.flush();

    }

    static void createJarWithLargeFile(File jarFile, File javaFile,

            long minlength) throws IOException {

        Utils.createClassFile(javaFile, null, true);

        File classFile = new File(Utils.getClassFileName(javaFile));

        ZipOutputStream zos = null;

        BufferedOutputStream bos = null;

        FileInputStream fis = null;

        try {

            zos = new ZipOutputStream(new FileOutputStream(jarFile));

            zos.setLevel(ZipOutputStream.STORED);

            zos.setMethod(0);

            bos = new BufferedOutputStream(zos);

            ZipEntry ze = new ZipEntry("large.data");

            ze.setCompressedSize(getCount(minlength) * BUFFER_LEN);

            ze.setSize(getCount(minlength) * BUFFER_LEN);

            ze.setCrc(computeCRC(minlength));

            ze.setMethod(ZipEntry.STORED);

            zos.putNextEntry(ze);

            createLargeFile(bos, minlength);

            ze = new ZipEntry(classFile.getName());

            ze.setCompressedSize(classFile.length());

            ze.setSize(classFile.length());

            ze.setCrc(computeCRC(classFile));

            ze.setMethod(ZipEntry.STORED);

            zos.putNextEntry(ze);

            fis = new FileInputStream(classFile);

            Utils.copyStream(fis, bos);

            bos.flush();

            zos.closeEntry();

        } finally {

            Utils.close(bos);

            Utils.close(zos);

            Utils.close(fis);

        }

        // deleted to prevent accidental linkage

        new File(Utils.getClassFileName(javaFile)).delete();

    }

    static void createLargeJar(File jarFile, File javaFile) throws IOException {

        File classFile = new File(Utils.getClassFileName(javaFile));

        Utils.createClassFile(javaFile, null, true);

        ZipOutputStream zos = null;

        FileInputStream fis = null;

        final int MAX = Short.MAX_VALUE * 2 + 10;

        ZipEntry ze = null;

        try {

            zos = new ZipOutputStream(new FileOutputStream(jarFile));

            zos.setLevel(ZipOutputStream.STORED);

            zos.setMethod(ZipOutputStream.STORED);

            for (int i = 0; i < MAX ; i++) {

                ze = new ZipEntry("X" + i + ".txt");

                ze.setSize(0);

                ze.setCompressedSize(0);

                ze.setCrc(0);

                zos.putNextEntry(ze);

            }

            // add a class file

            ze = new ZipEntry(classFile.getName());

            ze.setCompressedSize(classFile.length());

            ze.setSize(classFile.length());

            ze.setCrc(computeCRC(classFile));

            zos.putNextEntry(ze);

            fis = new FileInputStream(classFile);

            Utils.copyStream(fis, zos);

        } finally {

            Utils.close(zos);

            Utils.close(fis);

        // deleted to prevent accidental linkage

        new File(Utils.getClassFileName(javaFile)).delete();

    }

    }

    // a jar with entries exceeding 64k + a class file for the existential test

    public static void testScenarioA(String... args) throws IOException {

        File largeJar = new File("large.jar");

        File javaFile = new File("Foo.java");

        createLargeJar(largeJar, javaFile);

        File testFile = new File("Bar.java");

        try {

            Utils.createJavaFile(testFile, javaFile);

            if (!Utils.compile("-doe", "-verbose", "-cp",

                    largeJar.getAbsolutePath(), testFile.getAbsolutePath())) {

                throw new IOException("test failed");

            }

        } finally {

            Utils.deleteFile(largeJar);

        }

    }

    // a jar with an enormous file + a class file for the existential test

    public static void testScenarioB(String... args) throws IOException {

        final File largeJar = new File("huge.jar");

        final File javaFile = new File("Foo.java");

        final Path path = largeJar.getAbsoluteFile().getParentFile().toPath();

        final long available = Files.getFileStore(path).getUsableSpace();

        final long MAX_VALUE = 0xFFFF_FFFFL;

        final long absolute  = MAX_VALUE + 1L;

        final long required  = (long)(absolute * 1.1); // pad for sundries

        System.out.println("\tavailable: " + available / GIGA + " GB");

        System.out.println("\trequired: " + required / GIGA + " GB");

        if (available > required) {

            createJarWithLargeFile(largeJar, javaFile, absolute);

            File testFile = new File("Bar.java");

            Utils.createJavaFile(testFile, javaFile);

            try {

                if (!Utils.compile("-doe", "-verbose", "-cp",

                        largeJar.getAbsolutePath(), testFile.getAbsolutePath())) {

                    throw new IOException("test failed");

                }

            } finally {

                Utils.deleteFile(largeJar);

            }

        } else {

            System.out.println("Warning: testScenarioB passes vacuously," +

                    " requirements exceeds available space");

        }

    }

    public static void main(String... args) throws IOException {

        testScenarioA();

        System.out.println("testScenarioA: PASS");

        if (Boolean.getBoolean("T6836682.testScenarioB")) {

            testScenarioB();

            System.out.println("testScenarioB: PASS");

        } else {

            System.out.println("Warning: testScenarioB, large file test skipped");

        }

    }

}