Android UTF Check utf8Length(byte[] buffer, int str, int len)

Description

utf Length

License

Open Source License

Declaration

public static int utf8Length(byte[] buffer, int str, int len) 

Method Source Code

//package com.java2s;
/*/*from w w w.j a va2s . com*/
 * Copyright (C) 2007-2010 Geometer Plus <contact@geometerplus.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

public class Main {
    public static int utf8Length(byte[] buffer, int str, int len) {
        final int last = str + len;
        int counter = 0;
        while (str < last) {
            final int bt = buffer[str];
            if ((bt & 0x80) == 0) {
                ++str;
            } else if ((bt & 0x20) == 0) {
                str += 2;
            } else if ((bt & 0x10) == 0) {
                str += 3;
            } else {
                str += 4;
            }
            ++counter;
        }
        return counter;
    }
}

Related

1. getUTFFormat(int p_type)
2. isUTFFormat(String p_format)
3. isUTF8(String encoding)