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 package jdk.tools.jaotc.binformat.pecoff;
  25 
  26 import java.io.File;
  27 import java.io.FileOutputStream;
  28 
  29 public class PECoffContainer {
  30 
  31     File outputFile;
  32     FileOutputStream outputStream;
  33     long fileOffset;
  34 
  35     public PECoffContainer(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("PECoffContainer: 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("PECoffContainer: 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("PECoffContainer: 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("PECoffContainer: writeBytes failed");
  81         }
  82         fileOffset += bytes.length;
  83     }
  84 }
  85