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