/*
 * $Id$
 *
 * Copyright (C) 2003-2015 JNode.org
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This library 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 Lesser General Public 
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; If not, write to the Free Software Foundation, Inc., 
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
package org.jnode.vm.compiler;

import org.jnode.vm.bytecode.BytecodeFlags;
import org.jnode.vm.bytecode.BytecodeParser;
import org.jnode.vm.bytecode.ControlFlowGraph;
import org.jnode.vm.classmgr.VmByteCode;

/**
 * @author Ewout Prangsma (epr@users.sourceforge.net)
 */
public class CompilerBytecodeParser extends BytecodeParser implements BytecodeFlags {

    private final ControlFlowGraph cfg;
    private final CompilerBytecodeVisitor handler;

    /**
     * @param bc
     * @param cfg
     * @param handler
     */
    protected CompilerBytecodeParser(VmByteCode bc, ControlFlowGraph cfg, CompilerBytecodeVisitor handler) {
        super(bc, handler);
        this.cfg = cfg;
        this.handler = handler;
    }

    /**
     * @see org.jnode.vm.bytecode.BytecodeParser#fireStartInstruction(int)
     */
    protected void fireStartInstruction(int address) {
        final int flags = cfg.getOpcodeFlags(address);
        if ((flags & F_START_OF_TRYBLOCK) != 0) {
            handler.startTryBlock();
        }
        if ((flags & F_START_OF_TRYBLOCKEND) != 0) {
            handler.endTryBlock();
        }
        super.fireStartInstruction(address);
        if ((flags & F_YIELDPOINT) != 0) {
            handler.yieldPoint();
        }
    }

}