1 /* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.internal.util; 18 19 import com.android.internal.util.BitwiseInputStream; 20 import com.android.internal.util.BitwiseOutputStream; 21 import com.android.internal.util.HexDump; 22 23 import android.test.AndroidTestCase; 24 import android.test.suitebuilder.annotation.SmallTest; 25 26 import android.util.Log; 27 28 import java.util.Random; 29 30 public class BitwiseStreamsTest extends AndroidTestCase { 31 private final static String LOG_TAG = "BitwiseStreamsTest"; 32 33 @SmallTest 34 public void testOne() throws Exception { 35 int offset = 3; 36 byte[] inBuf = HexDump.hexStringToByteArray("FFDD"); 37 BitwiseOutputStream outStream = new BitwiseOutputStream(30); 38 outStream.skip(offset); 39 for (int i = 0; i < inBuf.length; i++) outStream.write(8, inBuf[i]); 40 byte[] outBuf = outStream.toByteArray(); 41 BitwiseInputStream inStream = new BitwiseInputStream(outBuf); 42 byte[] inBufDup = new byte[inBuf.length]; 43 inStream.skip(offset); 44 for (int i = 0; i < inBufDup.length; i++) inBufDup[i] = (byte)inStream.read(8); 45 assertEquals(HexDump.toHexString(inBuf), HexDump.toHexString(inBufDup)); 46 } 47 48 @SmallTest 49 public void testTwo() throws Exception { 50 int offset = 3; 51 byte[] inBuf = HexDump.hexStringToByteArray("11d4f29c0e9ad3c36e72584e064d9b53"); 52 BitwiseOutputStream outStream = new BitwiseOutputStream(30); 53 outStream.skip(offset); 54 for (int i = 0; i < inBuf.length; i++) outStream.write(8, inBuf[i]); 55 BitwiseInputStream inStream = new BitwiseInputStream(outStream.toByteArray()); 56 inStream.skip(offset); 57 byte[] inBufDup = new byte[inBuf.length]; 58 for (int i = 0; i < inBufDup.length; i++) inBufDup[i] = (byte)inStream.read(8); 59 assertEquals(HexDump.toHexString(inBuf), HexDump.toHexString(inBufDup)); 60 } 61 62 @SmallTest 63 public void testThree() throws Exception { 64 int offset = 4; 65 byte[] inBuf = HexDump.hexStringToByteArray("00031040900112488ea794e0"); 66 BitwiseOutputStream outStream = new BitwiseOutputStream(30); 67 outStream.skip(offset); 68 for (int i = 0; i < inBuf.length; i++) outStream.write(8, inBuf[i]); 69 BitwiseInputStream inStream = new BitwiseInputStream(outStream.toByteArray()); 70 inStream.skip(offset); 71 byte[] inBufDup = new byte[inBuf.length]; 72 for (int i = 0; i < inBufDup.length; i++) inBufDup[i] = (byte)inStream.read(8); 73 assertEquals(HexDump.toHexString(inBuf), HexDump.toHexString(inBufDup)); 74 } 75 76 @SmallTest 77 public void testFour() throws Exception { 78 int offset = 7; 79 byte[] inBuf = HexDump.hexStringToByteArray("00031040900112488ea794e0"); 80 BitwiseOutputStream outStream = new BitwiseOutputStream(30); 81 outStream.skip(offset); 82 for (int i = 0; i < inBuf.length; i++) { 83 outStream.write(5, inBuf[i] >>> 3); 84 outStream.write(3, inBuf[i] & 0x07); 85 } 86 BitwiseInputStream inStream = new BitwiseInputStream(outStream.toByteArray()); 87 inStream.skip(offset); 88 byte[] inBufDup = new byte[inBuf.length]; 89 for (int i = 0; i < inBufDup.length; i++) inBufDup[i] = (byte)inStream.read(8); 90 assertEquals(HexDump.toHexString(inBuf), HexDump.toHexString(inBufDup)); 91 } 92 93 @SmallTest 94 public void testFive() throws Exception { 95 Random random = new Random(); 96 int iterations = 10000; 97 int[] sizeArr = new int[iterations]; 98 int[] valueArr = new int[iterations]; 99 BitwiseOutputStream outStream = new BitwiseOutputStream(iterations * 4); 100 for (int i = 0; i < iterations; i++) { 101 int x = random.nextInt(); 102 int size = (x & 0x07) + 1; 103 int value = x & (-1 >>> (32 - size)); 104 sizeArr[i] = size; 105 valueArr[i] = value; 106 outStream.write(size, value); 107 } 108 BitwiseInputStream inStream = new BitwiseInputStream(outStream.toByteArray()); 109 for (int i = 0; i < iterations; i++) { 110 assertEquals(valueArr[i], inStream.read(sizeArr[i])); 111 } 112 } 113 114 @SmallTest 115 public void testSix() throws Exception { 116 int num_runs = 10; 117 long start = android.os.SystemClock.elapsedRealtime(); 118 for (int run = 0; run < num_runs; run++) { 119 int offset = run % 8; 120 byte[] inBuf = HexDump.hexStringToByteArray("00031040900112488ea794e0"); 121 BitwiseOutputStream outStream = new BitwiseOutputStream(30); 122 outStream.skip(offset); 123 for (int i = 0; i < inBuf.length; i++) { 124 outStream.write(5, inBuf[i] >>> 3); 125 outStream.write(3, inBuf[i] & 0x07); 126 } 127 BitwiseInputStream inStream = new BitwiseInputStream(outStream.toByteArray()); 128 inStream.skip(offset); 129 byte[] inBufDup = new byte[inBuf.length]; 130 for (int i = 0; i < inBufDup.length; i++) inBufDup[i] = (byte)inStream.read(8); 131 assertEquals(HexDump.toHexString(inBuf), HexDump.toHexString(inBufDup)); 132 } 133 long end = android.os.SystemClock.elapsedRealtime(); 134 Log.d(LOG_TAG, "repeated encode-decode took " + (end - start) + " ms"); 135 } 136 137 @SmallTest 138 public void testExpandArray() throws Exception { 139 Random random = new Random(); 140 int iterations = 10000; 141 int[] sizeArr = new int[iterations]; 142 int[] valueArr = new int[iterations]; 143 BitwiseOutputStream outStream = new BitwiseOutputStream(8); 144 for (int i = 0; i < iterations; i++) { 145 int x = random.nextInt(); 146 int size = (x & 0x07) + 1; 147 int value = x & (-1 >>> (32 - size)); 148 sizeArr[i] = size; 149 valueArr[i] = value; 150 outStream.write(size, value); 151 } 152 BitwiseInputStream inStream = new BitwiseInputStream(outStream.toByteArray()); 153 for (int i = 0; i < iterations; i++) { 154 assertEquals(valueArr[i], inStream.read(sizeArr[i])); 155 } 156 } 157 } 158
