SquirrelJME/SquirrelJME

// -*- Mode: Java; indent-tabs-mode: t; tab-width: 4 -*-
// ---------------------------------------------------------------------------
// Multi-Phasic Applications: 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.c;

import java.io.IOException;

/**
 * Used to handle preprocessor if-blocks.
 *
 * @since 2023/05/29
 */
public class CPPBlock
    extends CBlock
{
    /** On final else? */
    private boolean _finalElse;
    
    /**
     * Initializes the C Block.
     *
     * @param __writer The reference to use.
     * @throws NullPointerException On null arguments.
     * @since 2023/05/29
     */
    CPPBlock(CSourceWriter __writer)
        throws NullPointerException
    {
        super(__writer, null, false);
    }
    
    /**
     * Performs an else of the preprocessor.
     * 
     * @throws IOException On write errors.
     * @throws IllegalStateException If else was already done.
     * @since 2023/05/29
     */
    public void preprocessorElse()
        throws IOException, IllegalStateException
    {
        /* {@squirreljme.error CW08 Cannot else else the preprocessor.} */
        if (this._finalElse)
            throw new IllegalStateException("CW08");
        
        // Add line
        this.preprocessorLine(CPPDirective.ELSE);
        
        // We cannot else anymore
        this._finalElse = true;
    }
    
    /**
     * Performs an else if of the preprocessor.
     * 
     * @param __condition The condition of the else if.
     * @throws IOException On write errors.
     * @throws IllegalStateException If else was already done.
     * @throws NullPointerException On null arguments.
     * @since 2023/05/29
     */
    protected void preprocessorElseIf(Object... __condition)
        throws IOException, IllegalStateException, NullPointerException
    {
        if (__condition == null || __condition.length == 0)
            throw new NullPointerException("NARG");
        
        /* {@squirreljme.error CW08 Cannot else else the preprocessor.} */
        if (this._finalElse)
            throw new IllegalStateException("CW08");
        
        // Add line
        this.preprocessorLine(CPPDirective.ELIF, __condition);
    }
    
    /**
     * {@inheritDoc}
     * @since 2023/05/29
     */
    @Override
    void __finish()
        throws IOException
    {
        // Just end with this endif
        this.preprocessorLine(CPPDirective.ENDIF);
    }
}