/*******************************************************************************
 * Copyright (c) 2004-2008 Andras Schmidt, Andras Balogh, Istvan Rath and Daniel Varro
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Andras Schmidt, Andras Balogh, Istvan Rath - initial API and implementation
 *******************************************************************************/

package org.eclipse.viatra2.buffers;

import java.io.StringWriter;

import org.eclipse.viatra2.core.IModelSpace;
import org.eclipse.viatra2.errors.VPMRuntimeException;
import org.eclipse.viatra2.natives.ASMNativeFunction;

public class BufferPrint implements ASMNativeFunction {

	public Object evaluate(IModelSpace msp, Object[] params)
			throws VPMRuntimeException {
		if (params[0] instanceof StringWriter) {
			StringWriter out = (StringWriter) params[0];
			int ctr = 0;
			for (int i = 1; i < params.length; i++) {
				String s = params[i].toString();
				out.write(s);
				ctr += s.length();
			}
			return ctr;
		} else
			return 0;
	}

	public String getDescription() {
		return "Prints output to the given buffer.";
	}

	public String getID() {
		return "bufferPrint";
	}

	public String getName() {
		return "bufferPrint";
	}

}