1 /* 2 * Copyright (c) 2016, 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 24 package jdk.tools.jaotc.binformat.elf; 25 26 import java.io.File; 27 import java.io.FileOutputStream; 28 29 public class ElfContainer { 30 31 File outputFile; 32 FileOutputStream outputStream; 33 long fileOffset; 34 35 public ElfContainer(String fileName, String aotVersion) { 36 String baseName; 37 38 outputFile = new File(fileName); 39 if (outputFile.exists()) { 40 outputFile.delete(); 41 } 42 43 try { 44 outputStream = new FileOutputStream(outputFile); 45 } catch (Exception e) { 46 System.out.println("ElfContainer: Can't create file " + fileName); 47 } 48 fileOffset = 0; 49 } 50 51 public void close() { 52 try { 53 outputStream.close(); 54 } catch (Exception e) { 55 System.out.println("ElfContainer: close failed"); 56 } 57 } 58 59 public void writeBytes(byte [] bytes) { 60 if (bytes == null) return; 61 try { 62 outputStream.write(bytes); 63 } catch (Exception e) { 64 System.out.println("ElfContainer: writeBytes failed"); 65 } 66 fileOffset += bytes.length; 67 } 68 69 // Write bytes to output file with up front alignment padding 70 public void writeBytes(byte [] bytes, int alignment) { 71 if (bytes == null) return; 72 try { 73 // Pad to alignment 74 while ((fileOffset & (long)(alignment-1)) != 0) { 75 outputStream.write(0); 76 fileOffset++; 77 } 78 outputStream.write(bytes); 79 } catch (Exception e) { 80 System.out.println("ElfContainer: writeBytes failed"); 81 } 82 fileOffset += bytes.length; 83 } 84 } 85