bytetochariso8859_1.java

来自「This is a resource based on j2me embedde」· Java 代码 · 共 100 行

/*
 * @(#)ByteToCharISO8859_1.java	1.24 06/10/10
 *
 * Copyright  1990-2008 Sun Microsystems, Inc. All Rights Reserved.  
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER  
 *   
 * This program is free software; you can redistribute it and/or  
 * modify it under the terms of the GNU General Public License version  
 * 2 only, as published by the Free Software Foundation.   
 *   
 * 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 version 2 for more details (a copy is  
 * included at /legal/license.txt).   
 *   
 * You should have received a copy of the GNU General Public License  
 * version 2 along with this work; if not, write to the Free Software  
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  
 * 02110-1301 USA   
 *   
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa  
 * Clara, CA 95054 or visit www.sun.com if you need additional  
 * information or have any questions. 
 *
 */
package sun.io;

/**
* A algorithmic conversion from ISO 8859-1 to Unicode
*
* @author Lloyd Honomichl
* @author Asmus Freytag
*/
public class ByteToCharISO8859_1 extends ByteToCharConverter {

    // Return the character set id
    public String getCharacterEncoding()
    {
        return "ISO8859_1";
    }

    public int flush(char[] output, int outStart, int outEnd) {
	// This converter will not buffer any data.
	byteOff = charOff = 0;
	return 0;
    }

    /**
    * Algorithmic character conversion
    */
    public native int convert(byte[] input, int inOff, int inEnd,
                              char[] output, int outOff, int outEnd)
        throws ConversionBufferFullException;

    /**
    * This is the old Java version convert(). We changed it
    * to a CNI method for performance purpose.
    * 
    *public int convert(byte[] input, int inOff, int inEnd,
    *                   char[] output, int outOff, int outEnd)
    *
    *    throws ConversionBufferFullException
    *{
    *    int bound = inOff + (outEnd - outOff);
    *    if (bound >= inEnd) {
    *         bound = inEnd;
    *    }
    *    int bytesWritten = inEnd - inOff;
    *
    *
    *    // Loop until we hit the end of the input
    *    try {
    *        while(inOff < bound) {
    *            output[outOff++] = (char) (0xff & input[inOff++]);
    *        }
    *    } finally {
    *        charOff = outOff;
    *        byteOff = inOff;
    *    }
    *
    *    // If we don't have room for the output, throw an exception
    *    if (bound < inEnd)
    *        throw new ConversionBufferFullException();
    *
    *    // Return the length written to the output buffer
    *    return bytesWritten;
    *}
    */


    /*
        Reset after finding bad input
    */
    public void reset() {
	byteOff = charOff = 0;
    }

}