/*
 * Copyright (c) 2012, 2012, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package com.oracle.truffle.sl.nodes.controlflow;

import com.oracle.truffle.api.frame.*;
import com.oracle.truffle.api.utilities.*;
import com.oracle.truffle.sl.nodes.*;

public class SLWhileNode extends SLStatementNode {

    @Child private SLExpressionNode condition;
    @Child private SLStatementNode body;

    private final BranchProfile continueTaken = new BranchProfile();
    private final BranchProfile breakTaken = new BranchProfile();

    public SLWhileNode(SLExpressionNode condition, SLStatementNode body) {
        this.condition = adoptChild(condition);
        this.body = adoptChild(body);
    }

    @Override
    public void executeVoid(VirtualFrame frame) {
        try {
            while (condition.executeCondition(frame)) {
                try {
                    body.executeVoid(frame);
                } catch (SLContinueException ex) {
                    continueTaken.enter();
                    /* Fall through to next loop iteration. */
                }
            }
        } catch (SLBreakException ex) {
            breakTaken.enter();
            /* Done executing this loop, exit method to execute statement following the loop. */
        }
    }
}