JavaScriptCore-1218.34.tar.gz

[apple/javascriptcore.git] / interpreter / CallFrameClosure.h

/*
 * Copyright (C) 2009 Apple Inc. All rights reserved.
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 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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#ifndef CallFrameClosure_h
#define CallFrameClosure_h

namespace JSC {

struct CallFrameClosure {
    CallFrame* oldCallFrame;
    CallFrame* newCallFrame;
    JSFunction* function;
    FunctionExecutable* functionExecutable;
    VM* vm;
    JSScope* scope;
    int parameterCountIncludingThis;
    int argumentCountIncludingThis;
    
    void setThis(JSValue value)
    {
        newCallFrame->setThisValue(value);
    }

    void setArgument(int argument, JSValue value)
    {
        newCallFrame->setArgument(argument, value);
    }

    void resetCallFrame()
    {
        newCallFrame->setScope(scope);
        // setArgument() takes an arg index that starts from 0 for the first
        // argument after the 'this' value. Since both argumentCountIncludingThis
        // and parameterCountIncludingThis includes the 'this' value, we need to
        // subtract 1 from them to make i a valid argument index for setArgument().
        for (int i = argumentCountIncludingThis-1; i < parameterCountIncludingThis-1; ++i)
            newCallFrame->setArgument(i, jsUndefined());
    }
};

}

#endif