1/* 2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24package jdk.tools.jaotc.binformat.macho; 25 26import java.io.File; 27import java.io.FileOutputStream; 28 29final class MachOContainer { 30 31 private final File outputFile; 32 private FileOutputStream outputStream; 33 private long fileOffset; 34 35 MachOContainer(String fileName) { 36 37 outputFile = new File(fileName); 38 if (outputFile.exists()) { 39 outputFile.delete(); 40 } 41 42 try { 43 outputStream = new FileOutputStream(outputFile); 44 } catch (Exception e) { 45 System.out.println("MachOContainer: Can't create file " + fileName); 46 } 47 fileOffset = 0; 48 } 49 50 void close() { 51 try { 52 outputStream.close(); 53 } catch (Exception e) { 54 System.out.println("MachOContainer: close failed"); 55 } 56 } 57 58 void writeBytes(byte[] bytes) { 59 try { 60 outputStream.write(bytes); 61 } catch (Exception e) { 62 System.out.println("MachOContainer: writeBytes failed"); 63 } 64 fileOffset += bytes.length; 65 } 66 67 // Write bytes to output file with up front alignment padding 68 void writeBytes(byte[] bytes, int alignment) { 69 try { 70 // Pad to alignment 71 while ((fileOffset & (alignment - 1)) != 0) { 72 outputStream.write(0); 73 fileOffset++; 74 } 75 outputStream.write(bytes); 76 } catch (Exception e) { 77 System.out.println("MachOContainer: writeBytes failed"); 78 } 79 fileOffset += bytes.length; 80 } 81} 82