1/* 2 * Copyright (C) 2013 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 17package com.android.tools.layoutlib.java; 18 19import java.nio.charset.Charset; 20 21/** 22 * Defines the same class as the java.lang.UnsafeByteSequence which was added in 23 * Dalvik VM. This hack, provides a replacement for that class which can't be 24 * loaded in the standard JVM since it's in the java package and standard JVM 25 * doesn't have it. 26 * <p/> 27 * Extracted from API level 18, file: 28 * platform/libcore/luni/src/main/java/java/lang/UnsafeByteSequence.java 29 */ 30public class UnsafeByteSequence { 31 private byte[] bytes; 32 private int count; 33 34 public UnsafeByteSequence(int initialCapacity) { 35 this.bytes = new byte[initialCapacity]; 36 } 37 38 public int size() { 39 return count; 40 } 41 42 /** 43 * Moves the write pointer back to the beginning of the sequence, 44 * but without resizing or reallocating the buffer. 45 */ 46 public void rewind() { 47 count = 0; 48 } 49 50 public void write(byte[] buffer, int offset, int length) { 51 if (count + length >= bytes.length) { 52 byte[] newBytes = new byte[(count + length) * 2]; 53 System.arraycopy(bytes, 0, newBytes, 0, count); 54 bytes = newBytes; 55 } 56 System.arraycopy(buffer, offset, bytes, count, length); 57 count += length; 58 } 59 60 public void write(int b) { 61 if (count == bytes.length) { 62 byte[] newBytes = new byte[count * 2]; 63 System.arraycopy(bytes, 0, newBytes, 0, count); 64 bytes = newBytes; 65 } 66 bytes[count++] = (byte) b; 67 } 68 69 public byte[] toByteArray() { 70 if (count == bytes.length) { 71 return bytes; 72 } 73 byte[] result = new byte[count]; 74 System.arraycopy(bytes, 0, result, 0, count); 75 return result; 76 } 77 78 public String toString(Charset cs) { 79 return new String(bytes, 0, count, cs); 80 } 81} 82