1f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 2f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Copyright (C) 2007 The Android Open Source Project 3f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 4f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 5f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * you may not use this file except in compliance with the License. 6f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * You may obtain a copy of the License at 7f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 8f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 9f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 10f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 11f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 12f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * See the License for the specific language governing permissions and 14f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * limitations under the License. 15f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 16f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 17f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectpackage com.android.dx.util; 18f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 19f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectimport java.io.File; 20f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectimport java.io.FileInputStream; 21f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectimport java.io.IOException; 22f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 23f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/** 24f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * File I/O utilities. 25f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 26f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectpublic final class FileUtils { 27f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** 28f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * This class is uninstantiable. 29f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 30f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project private FileUtils() { 31f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // This space intentionally left blank. 32f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 33f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 34f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** 35f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Reads the named file, translating {@link IOException} to a 36f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * {@link RuntimeException} of some sort. 37f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 3899409883d9c4c0ffb49b070ce307bb33a9dfe9f1The Android Open Source Project * @param fileName {@code non-null;} name of the file to read 3999409883d9c4c0ffb49b070ce307bb33a9dfe9f1The Android Open Source Project * @return {@code non-null;} contents of the file 40f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 41f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public static byte[] readFile(String fileName) { 42f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project File file = new File(fileName); 43f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return readFile(file); 44f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 45f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 46f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** 47f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Reads the given file, translating {@link IOException} to a 48f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * {@link RuntimeException} of some sort. 49f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 5099409883d9c4c0ffb49b070ce307bb33a9dfe9f1The Android Open Source Project * @param file {@code non-null;} the file to read 5199409883d9c4c0ffb49b070ce307bb33a9dfe9f1The Android Open Source Project * @return {@code non-null;} contents of the file 52f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 53f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public static byte[] readFile(File file) { 54f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (!file.exists()) { 55f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project throw new RuntimeException(file + ": file not found"); 56f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 57f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 58f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (!file.isFile()) { 59f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project throw new RuntimeException(file + ": not a file"); 60f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 61f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 62f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (!file.canRead()) { 63f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project throw new RuntimeException(file + ": file not readable"); 64f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 65f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 66f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project long longLength = file.length(); 67f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project int length = (int) longLength; 68f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (length != longLength) { 69f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project throw new RuntimeException(file + ": file too long"); 70f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 71f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 72f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project byte[] result = new byte[length]; 73f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 74f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project try { 75f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project FileInputStream in = new FileInputStream(file); 76f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project int at = 0; 77f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project while (length > 0) { 78f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project int amt = in.read(result, at, length); 79f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (amt == -1) { 80f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project throw new RuntimeException(file + ": unexpected EOF"); 81f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 82f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project at += amt; 83f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project length -= amt; 84f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 85f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project in.close(); 86f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } catch (IOException ex) { 87f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project throw new RuntimeException(file + ": trouble reading", ex); 88f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 89f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 90f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return result; 91f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 92f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 93