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/*
* Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
* 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
* questions.
*/
/**
* @test
* @bug 6571338
* @summary Inflater should not require a buffer to the inflate() methods
* larger than 1 byte.
* @key randomness
*/
import java.io.*;
import java.nio.*;
import java.util.*;
import java.util.zip.*;
public class InflaterBufferSize {
private static final int DATA_LEN = 1024 *64;
private static byte[] data;
// If true, print extra info.
private static final boolean debug = System.getProperty("debug") != null;
private static void debug(String s) {
if (debug) System.out.println(s);
}
private static void createData() {
ByteBuffer bb = ByteBuffer.allocate(8);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
for (int i = 0; i < DATA_LEN; i++) {
bb.putDouble(0, Math.random());
baos.write(bb.array(), 0, 8);
}
data = baos.toByteArray();
}
private static byte[] grow(byte[] a, int capacity) {
while (a.length < capacity) {
byte[] a2 = new byte[a.length * 2];
System.arraycopy(a, 0, a2, 0, a.length);
a = a2;
}
return a;
}
private static byte[] trim(byte[] a, int length) {
byte[] res = new byte[length];
System.arraycopy(a, 0, res, 0, length);
return res;
}
private static byte[] deflate(byte[] in, int level) throws Throwable {
final Deflater flater = new Deflater(level);
flater.setInput(in);
flater.finish();
final byte[] smallBuffer = new byte[32];
byte[] flated = new byte[32];
int count = 0;
int n;
while ((n = flater.deflate(smallBuffer)) > 0) {
flated = grow(flated, count + n);
System.arraycopy(smallBuffer, 0, flated, count, n);
count += n;
}
return trim(flated, count);
}
private static byte[] inflate(byte[] in) throws Throwable {
final Inflater flater = new Inflater();
flater.setInput(in);
// This is the buffer of interest. It should be possible to use any
// non-zero size.
final byte[] smallBuffer = new byte[1];
byte[] flated = new byte[32];
int count = 0;
int n;
while ((n = flater.inflate(smallBuffer)) > 0) {
flated = grow(flated, count + n);
System.arraycopy(smallBuffer, 0, flated, count, n);
count += n;
}
return trim(flated, count);
}
public static void realMain(String[] args) throws Throwable {
byte deflated[], inflated[];
int level = -1;
if (args.length > 0) {
level = Integer.parseInt(args[0]);
}
debug("Using level " + level);
if (args.length > 1) {
FileInputStream fis = new FileInputStream(args[1]);
int len = fis.available();
data = new byte[len];
check(fis.read(data, 0, len) == len, "Did not read complete file");
debug("Original data from " + args[1]);
fis.close();
} else {
createData();
debug("Original data from random byte array");
}
debug("Original data length: " + data.length + " bytes");
debug("");
deflated = deflate(data, level);
debug("Deflated data length: " + deflated.length + " bytes");
inflated = inflate(deflated);
debug("Inflated data length: "+ inflated.length + " bytes" );
if (!check(Arrays.equals(data, inflated),
"Inflated and deflated arrays do not match")) {
OutputStream os = new BufferedOutputStream(new FileOutputStream("deflated.zip"));
try {
os.write(deflated);
} finally {
os.close();
}
}
}
//--------------------- Infrastructure ---------------------------
static volatile int passed = 0, failed = 0;
static void pass() {passed++;}
static void pass(String msg) {System.out.println(msg); passed++;}
static void fail() {failed++; Thread.dumpStack();}
static void fail(String msg) {System.out.println(msg); fail();}
static void unexpected(Throwable t) {failed++; t.printStackTrace();}
static void unexpected(Throwable t, String msg) {
System.out.println(msg); failed++; t.printStackTrace();}
static boolean check(boolean cond) {if (cond) pass(); else fail(); return cond;}
static boolean check(boolean cond, String msg) {if (cond) pass(); else fail(msg); return cond;}
static void equal(Object x, Object y) {
if (x == null ? y == null : x.equals(y)) pass();
else fail(x + " not equal to " + y);}
public static void main(String[] args) throws Throwable {
try {realMain(args);} catch (Throwable t) {unexpected(t);}
System.out.println("\nPassed = " + passed + " failed = " + failed);
if (failed > 0) throw new AssertionError("Some tests failed");}
}
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