1 /*
2  * EncoderUtil
3  *
4  * Author: Lasse Collin <lasse.collin@tukaani.org>
5  *
6  * This file has been put into the public domain.
7  * You can do whatever you want with this file.
8  */
9 
10 package org.tukaani.xz.common;
11 
12 import java.io.OutputStream;
13 import java.io.IOException;
14 import java.util.zip.CRC32;
15 
16 public class EncoderUtil extends Util {
writeCRC32(OutputStream out, byte[] buf)17     public static void writeCRC32(OutputStream out, byte[] buf)
18             throws IOException {
19         CRC32 crc32 = new CRC32();
20         crc32.update(buf);
21         long value = crc32.getValue();
22 
23         for (int i = 0; i < 4; ++i)
24             out.write((byte)(value >>> (i * 8)));
25     }
26 
encodeVLI(OutputStream out, long num)27     public static void encodeVLI(OutputStream out, long num)
28             throws IOException {
29         while (num >= 0x80) {
30             out.write((byte)(num | 0x80));
31             num >>>= 7;
32         }
33 
34         out.write((byte)num);
35     }
36 }
37