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;

/**
 * Encodes to EBCDIC IBM037.
 *
 * @since 2018/09/24
 */
public final class IBM037Encoder
    extends IBM037Base
    implements Encoder
{
    /**
     * {@inheritDoc}
     * @since 2018/09/24
     */
    @Override
    public final int encode(char __c, 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");
        
        // Always encodes to one character, so if one character cannot fit in
        // the buffer then fail
        if (__l < 1)
            return -1;
        
        // Invalid characters are turned into question marks
        if (__c >= 0x100)
            __c = '?';
        
        // Map
        __b[__o] = IBM037Base._MAP[__c];
        
        // Only single characters written
        return 1;
    }
}