/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the Netscape Security Services for Java.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998-2000
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
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 * decision by deleting the provisions above and replace them with the notice
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 * the provisions above, a recipient may use your version of this file under
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 *
 * ***** END LICENSE BLOCK ***** */
package org.mozilla.jss.asn1;

import java.io.CharConversionException;

public class IA5String extends CharacterString implements ASN1Value {

    public IA5String(char[] chars) throws CharConversionException {
        super(chars);
    }

    public IA5String(String s) throws CharConversionException {
        super(s);
    }

    CharConverter getCharConverter() {
        return new IA5Converter();
    }

    public static final Tag TAG = new Tag( Tag.Class.UNIVERSAL, 22 );

    public Tag getTag() {
        return TAG;
    }

    public static Template getTemplate() {
        return templateInstance;
    }
    private static final Template templateInstance = new Template();

// nested class
public static class Template
    extends CharacterString.Template implements ASN1Template
{
    public Tag getTag() {
        return IA5String.TAG;
    }
    public boolean tagMatch(Tag tag) {
        return( tag.equals( IA5String.TAG ));
    }

    protected CharConverter getCharConverter() {
        return new IA5Converter();
    }

    protected CharacterString generateInstance(char[] chars)
        throws CharConversionException
    {
        return new IA5String(chars);
    }

    protected String typeName() {
        return "IA5String";
    }
}

// nested class
private static class IA5Converter implements CharConverter {

    public char[] byteToChar(byte[] bytes, int offset, int len)
        throws CharConversionException
    {
        char[] chars = new char[len];

        int c; // char index
        int b; // byte index
        for(b = offset, c=0; c < len; b++, c++) {
            if( (bytes[b] & 0x80) != 0 ) {
                throw new CharConversionException("Invalid character: "+
                    bytes[b]);
            }
            chars[c] = (char) (bytes[b] & 0x7f);
        }
        return chars;
    }

    public byte[] charToByte(char[] chars, int offset, int len)
        throws CharConversionException
    {
        byte[] bytes = new byte[len];

        int c; // char index
        int b; // byte index
        for(c = offset, b = 0; b < len; c++, b++) {
            if( (chars[c] & 0x7f) != chars[c] ) {
                throw new CharConversionException("Invalid character: "+
                    chars[c]);
            }
            bytes[b] = (byte) (chars[c] & 0x7f);
        }

        return bytes;
    }
}

}
