1 /* 2 * EncoderUtil 3 * 4 * Author: Lasse Collin <lasse.collin (at) 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 { 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 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
