/*
* Copyright ( c ) 2006 , 2020 , 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 4679743
* @ summary Test basic functionality of DeflaterInputStream and InflaterOutputStream
* @ key randomness
*/
import java.io.*;
import java.util.*;
import java.util.zip.*;
public class DeflateIn_InflateOut {
private static byte [] data = new byte [1024 * 1024 ];
private static ByteArrayInputStream bais;
private static DeflaterInputStream dis;
private static ByteArrayOutputStream baos;
private static InflaterOutputStream ios;
private static Inflater reset(byte [] dict) {
bais = new ByteArrayInputStream(data);
if (dict == null ) {
dis = new DeflaterInputStream(bais);
} else {
Deflater def = new Deflater();
def.setDictionary(dict);
dis = new DeflaterInputStream(bais, def);
}
baos = new ByteArrayOutputStream();
if (dict == null ) {
ios = new InflaterOutputStream(baos);
return null ;
} else {
Inflater inf = new Inflater();
ios = new InflaterOutputStream(baos, inf);
return inf;
}
}
private static void reset() {
reset(null );
}
/** Check byte arrays read/write. */
private static void ArrayReadWrite() throws Throwable {
byte [] buf = new byte [512 ];
reset();
check(dis.available() == 1 );
for (;;) {
int len = dis.read(buf, 0 , buf.length);
if (len < 0 ) {
break ;
} else {
ios.write(buf, 0 , len);
}
}
check(dis.available() == 0 );
ios.close();
check(Arrays.equals(data, baos.toByteArray()));
}
/** Check byte arrays read, single byte write */
private static void ArrayReadByteWrite() throws Throwable {
byte [] buf = new byte [512 ];
reset();
for (;;) {
int len = dis.read(buf, 0 , buf.length);
if (len <= 0 ) {
break ;
} else {
for (int i = 0 ; i < len; i++) {
byte x = (byte ) (buf[i] & 0 xff);
ios.write(x);
}
}
}
check(dis.available() == 0 );
ios.close();
check(Arrays.equals(data, baos.toByteArray()));
}
/** Check single byte read, byte array write.
* < p >
* Note that this test relies on the vaule from DeflaterInputStream . read ( )
* to determine when to stop reading .
*/
private static void ByteReadArrayWrite() throws Throwable {
byte [] buf = new byte [8192 ];
int off = 0 ;
reset();
int datum = dis.read();
while (datum != -1 ) {
if (off == 8192 ) {
ios.write(buf, 0 , off);
off = 0 ;
}
buf[off++] = (byte ) (datum & 0 xff);
datum = dis.read();
}
if (off > 0 ) {
ios.write(buf, 0 , off);
}
ios.close();
check(Arrays.equals(data, baos.toByteArray()));
}
/** Check single byte read/write.
* < p >
* Note that this test relies on DeflaterInputStream . available ( ) to
* determine when to stop reading .
*/
private static void ByteReadByteWrite() throws Throwable {
byte [] buf = new byte [512 ];
boolean reachEOF = false ;
reset();
while (dis.available() == 1 ) {
int datum = dis.read();
if (datum == -1 ) {
reachEOF = true ;
} else {
if (datum < 0 || datum > 255 ) {
fail("datum out of range: " + datum);
}
ios.write(datum);
}
}
dis.close();
ios.close();
check(data[0 ] == baos.toByteArray()[0 ]);
}
/** Check skip(). */
private static void SkipBytes() throws Throwable {
byte [] buf = new byte [512 ];
int numReadable = 0 ;
// Count number of bytes that are read
reset();
check(dis.available() == 1 );
for (;;) {
int count = dis.read(buf, 0 , buf.length);
if (count < 0 ) {
break ;
} else {
numReadable += count;
}
}
check(dis.available() == 0 );
// Verify that skipping the first several bytes works.
reset();
int numNotSkipped = 0 ;
int numSkipBytes = 2053 ; // arbitrarily chosen prime
check(dis.skip(numSkipBytes) == numSkipBytes);
for (int i = 0 ; ; i++) {
int count = dis.read(buf, 0 , buf.length);
if (count < 0 ) {
break ;
} else {
numNotSkipped += count;
}
}
check(numNotSkipped + numSkipBytes == numReadable);
// Verify that skipping some bytes mid-stream works.
reset();
numNotSkipped = 0 ;
numSkipBytes = 8887 ; // arbitrarily chosen prime
for (int i = 0 ; ; i++) {
if (i == 13 ) { // Arbitrarily chosen
check(dis.skip(numSkipBytes) == numSkipBytes);
} else {
int count = dis.read(buf, 0 , buf.length);
if (count < 0 ) {
break ;
} else {
numNotSkipped += count;
}
}
}
check(numNotSkipped + numSkipBytes == numReadable);
// Verify that skipping the last N bytes works.
reset();
numNotSkipped = 0 ;
numSkipBytes = 6449 ; // arbitrarily chosen prime
for (int i = 0 ; ; i++) {
if (numNotSkipped + numSkipBytes > numReadable) {
numSkipBytes = numReadable - numNotSkipped;
check(dis.skip(numSkipBytes) == numSkipBytes);
check(dis.read(buf, 0 , buf.length) == -1 );
check(dis.available() == 0 );
} else {
int count = dis.read(buf, 0 , buf.length);
if (count < 0 ) {
break ;
} else {
numNotSkipped += count;
}
}
}
check(numNotSkipped + numSkipBytes == numReadable);
}
/** Check "needsDictionary()". */
private static void NeedsDictionary() throws Throwable {
byte [] dict = {1 , 2 , 3 , 4 };
Adler32 adler32 = new Adler32();
adler32.update(dict);
long checksum = adler32.getValue();
byte [] buf = new byte [512 ];
Inflater inf = reset(dict);
check(dis.available() == 1 );
boolean dictSet = false ;
for (;;) {
int len = dis.read(buf, 0 , buf.length);
if (len < 0 ) {
break ;
} else {
try {
ios.write(buf, 0 , len);
if (dictSet == false ) {
check(false , "Must throw ZipException without dictionary" );
return ;
}
} catch (ZipException ze) {
check(dictSet == false , "Dictonary must be set only once" );
check(checksum == inf.getAdler(), "Incorrect dictionary" );
inf.setDictionary(dict);
// After setting the dictionary, we have to flush the
// InflaterOutputStream now in order to consume all the
// pending input data from the last, failed call to "write()".
ios.flush();
dictSet = true ;
}
}
}
check(dis.available() == 0 );
ios.close();
check(Arrays.equals(data, baos.toByteArray()));
}
public static void realMain(String[] args) throws Throwable {
new Random(new Date().getTime()).nextBytes(data);
ArrayReadWrite();
ArrayReadByteWrite();
ByteReadArrayWrite();
ByteReadByteWrite();
SkipBytes();
NeedsDictionary();
}
//--------------------- Infrastructure ---------------------------
static volatile int passed = 0 , failed = 0 ;
static void pass() {passed++;}
static void fail() { fail(null ); }
static void fail(String msg) {
failed++;
if (msg != null ) {
System.err.println(msg);
}
Thread .dumpStack();
}
static void unexpected(Throwable t) {failed++; t.printStackTrace();}
static void check(boolean cond) {if (cond) pass(); else fail();}
static void check(boolean cond, String msg) {if (cond) pass(); else fail(msg);}
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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