SquirrelJME/SquirrelJME

// -*- Mode: Java; indent-tabs-mode: t; tab-width: 4 -*-
// ---------------------------------------------------------------------------
// SquirrelJME
//     Copyright (C) Stephanie Gawroriski <xer@multiphasicapps.net>
// ---------------------------------------------------------------------------
// SquirrelJME is under the Mozilla Public License Version 2.0.
// See license.mkd for licensing and copyright information.
// ---------------------------------------------------------------------------

package cc.squirreljme.runtime.cldc.io;

/**
 * Decoder for ISO-8859-15.
 *
 * @since 2019/04/29
 */
public class ISO885915Decoder
    implements Decoder
{
    /**
     * {@inheritDoc}
     * @since 2019/04/29
     */
    @Override
    public final double averageSequenceLength()
    {
        return 1.0;
    }
    
    /**
     * {@inheritDoc}
     * @since 2019/04/29
     */
    @Override
    public final int decode(byte[] __b, int __o, int __l)
        throws IndexOutOfBoundsException, NullPointerException
    {
        if (__b == null)
            throw new NullPointerException("NARG");
        if (__o < 0 || __l < 0 || (__o + __l) < 0 || (__o + __l) > __b.length)
            throw new IndexOutOfBoundsException("IOOB");
        
        // Not enough to decode a character
        if (__l <= 0)
            return -1;
        
        // Remap some characters?
        int c = (__b[__o] & 0xFF);
        switch (c)
        {
            case 0x00A4:    c = 0x20AC; break;
            case 0x00A6:    c = 0x0160; break;
            case 0x00A8:    c = 0x0161; break;
            case 0x00B4:    c = 0x017D; break;
            case 0x00B8:    c = 0x017E; break;
            case 0x00BC:    c = 0x0152; break;
            case 0x00BD:    c = 0x0153; break;
            case 0x00BE:    c = 0x0178; break;
        }
        
        return 0x1_0000 | c;
    }
    
    /**
     * {@inheritDoc}
     * @since 2019/04/29
     */
    @Override
    public final String encodingName()
    {
        return "iso-8859-15";
    }
    
    /**
     * {@inheritDoc}
     * @since 2019/04/29
     */
    @Override
    public final int maximumSequenceLength()
    {
        return 1;
    }
}