mirror of
https://github.com/servalproject/serval-dna.git
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71 lines
1.9 KiB
Java
71 lines
1.9 KiB
Java
/**
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* Copyright (C) 2014 Serval Project Inc.
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*
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* This file is part of Serval Software (http://www.servalproject.org)
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*
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* Serval Software is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This source code is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this source code; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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package org.servalproject.codec;
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import java.lang.StringBuilder;
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public class Base64 {
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public static final char[] SYMBOLS = {
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'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P',
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'Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f',
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'g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v',
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'w','x','y','z','0','1','2','3','4','5','6','7','8','9','+','/',
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'='
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};
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public static String encode(byte[] binary)
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{
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StringBuilder sb = new StringBuilder();
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int place = 0;
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byte buf = 0;
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for (byte b: binary) {
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switch (place) {
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case 0:
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sb.append(SYMBOLS[b >>> 2]);
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buf = (byte)((b << 4) & 0x3f);
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place = 1;
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break;
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case 1:
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sb.append(SYMBOLS[(b >>> 4) | buf]);
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buf = (byte)((b << 2) & 0x3f);
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place = 2;
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break;
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case 2:
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sb.append(SYMBOLS[(b >>> 6) | buf]);
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sb.append(SYMBOLS[b & 0x3f]);
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place = 0;
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break;
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}
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}
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if (place != 0)
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sb.append(SYMBOLS[buf]);
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switch (place) {
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case 1:
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sb.append(SYMBOLS[64]);
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case 2:
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sb.append(SYMBOLS[64]);
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}
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return sb.toString();
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}
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}
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