/*
 * Copyright (c) 2008, Google Inc. All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef ScriptCallStack_h
#define ScriptCallStack_h

#include "ScriptArray.h"
#include "ScriptCallFrame.h"
#include "ScriptState.h"
#include "ScriptString.h"
#include <wtf/Noncopyable.h>

namespace JSC {
    class ExecState;
    class JSValue;
}

namespace WebCore {

    class ScriptCallStack : public Noncopyable {
    public:
        ScriptCallStack(JSC::ExecState*, unsigned skipArgumentCount = 0);
        ~ScriptCallStack();

        ScriptState* state() const { return m_exec; }
        ScriptState* globalState() const { return m_exec->lexicalGlobalObject()->globalExec(); }
        // frame retrieval methods
        const ScriptCallFrame &at(unsigned);
        unsigned size();
        static bool stackTrace(int, ScriptState*, ScriptArray&);

    private:
        void initialize();
        bool m_initialized;

        JSC::ExecState* m_exec;
        Vector<ScriptCallFrame> m_frames;
        JSC::JSFunction* m_caller;
    };

} // namespace WebCore

#endif // ScriptCallStack_h