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/*
* Copyright (C) 2006 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.internal.util;
import com.android.internal.util.BitwiseInputStream;
import com.android.internal.util.BitwiseOutputStream;
import com.android.internal.util.HexDump;
import android.test.AndroidTestCase;
import android.test.suitebuilder.annotation.SmallTest;
import android.util.Log;
import java.util.Random;
public class BitwiseStreamsTest extends AndroidTestCase {
private final static String LOG_TAG = "BitwiseStreamsTest";
@SmallTest
public void testOne() throws Exception {
int offset = 3;
byte[] inBuf = HexDump.hexStringToByteArray("FFDD");
BitwiseOutputStream outStream = new BitwiseOutputStream(30);
outStream.skip(offset);
for (int i = 0; i < inBuf.length; i++) outStream.write(8, inBuf[i]);
byte[] outBuf = outStream.toByteArray();
BitwiseInputStream inStream = new BitwiseInputStream(outBuf);
byte[] inBufDup = new byte[inBuf.length];
inStream.skip(offset);
for (int i = 0; i < inBufDup.length; i++) inBufDup[i] = (byte)inStream.read(8);
assertEquals(HexDump.toHexString(inBuf), HexDump.toHexString(inBufDup));
}
@SmallTest
public void testTwo() throws Exception {
int offset = 3;
byte[] inBuf = HexDump.hexStringToByteArray("11d4f29c0e9ad3c36e72584e064d9b53");
BitwiseOutputStream outStream = new BitwiseOutputStream(30);
outStream.skip(offset);
for (int i = 0; i < inBuf.length; i++) outStream.write(8, inBuf[i]);
BitwiseInputStream inStream = new BitwiseInputStream(outStream.toByteArray());
inStream.skip(offset);
byte[] inBufDup = new byte[inBuf.length];
for (int i = 0; i < inBufDup.length; i++) inBufDup[i] = (byte)inStream.read(8);
assertEquals(HexDump.toHexString(inBuf), HexDump.toHexString(inBufDup));
}
@SmallTest
public void testThree() throws Exception {
int offset = 4;
byte[] inBuf = HexDump.hexStringToByteArray("00031040900112488ea794e0");
BitwiseOutputStream outStream = new BitwiseOutputStream(30);
outStream.skip(offset);
for (int i = 0; i < inBuf.length; i++) outStream.write(8, inBuf[i]);
BitwiseInputStream inStream = new BitwiseInputStream(outStream.toByteArray());
inStream.skip(offset);
byte[] inBufDup = new byte[inBuf.length];
for (int i = 0; i < inBufDup.length; i++) inBufDup[i] = (byte)inStream.read(8);
assertEquals(HexDump.toHexString(inBuf), HexDump.toHexString(inBufDup));
}
@SmallTest
public void testFour() throws Exception {
int offset = 7;
byte[] inBuf = HexDump.hexStringToByteArray("00031040900112488ea794e0");
BitwiseOutputStream outStream = new BitwiseOutputStream(30);
outStream.skip(offset);
for (int i = 0; i < inBuf.length; i++) {
outStream.write(5, inBuf[i] >>> 3);
outStream.write(3, inBuf[i] & 0x07);
}
BitwiseInputStream inStream = new BitwiseInputStream(outStream.toByteArray());
inStream.skip(offset);
byte[] inBufDup = new byte[inBuf.length];
for (int i = 0; i < inBufDup.length; i++) inBufDup[i] = (byte)inStream.read(8);
assertEquals(HexDump.toHexString(inBuf), HexDump.toHexString(inBufDup));
}
@SmallTest
public void testFive() throws Exception {
Random random = new Random();
int iterations = 10000;
int[] sizeArr = new int[iterations];
int[] valueArr = new int[iterations];
BitwiseOutputStream outStream = new BitwiseOutputStream(iterations * 4);
for (int i = 0; i < iterations; i++) {
int x = random.nextInt();
int size = (x & 0x07) + 1;
int value = x & (-1 >>> (32 - size));
sizeArr[i] = size;
valueArr[i] = value;
outStream.write(size, value);
}
BitwiseInputStream inStream = new BitwiseInputStream(outStream.toByteArray());
for (int i = 0; i < iterations; i++) {
assertEquals(valueArr[i], inStream.read(sizeArr[i]));
}
}
@SmallTest
public void testSix() throws Exception {
int num_runs = 10;
long start = android.os.SystemClock.elapsedRealtime();
for (int run = 0; run < num_runs; run++) {
int offset = run % 8;
byte[] inBuf = HexDump.hexStringToByteArray("00031040900112488ea794e0");
BitwiseOutputStream outStream = new BitwiseOutputStream(30);
outStream.skip(offset);
for (int i = 0; i < inBuf.length; i++) {
outStream.write(5, inBuf[i] >>> 3);
outStream.write(3, inBuf[i] & 0x07);
}
BitwiseInputStream inStream = new BitwiseInputStream(outStream.toByteArray());
inStream.skip(offset);
byte[] inBufDup = new byte[inBuf.length];
for (int i = 0; i < inBufDup.length; i++) inBufDup[i] = (byte)inStream.read(8);
assertEquals(HexDump.toHexString(inBuf), HexDump.toHexString(inBufDup));
}
long end = android.os.SystemClock.elapsedRealtime();
Log.d(LOG_TAG, "repeated encode-decode took " + (end - start) + " ms");
}
}
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