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