1 /*

     2  * Copyright (C) 2009 Apple Inc. All rights reserved.

     3  *

     4  * Redistribution and use in source and binary forms, with or without

     5  * modification, are permitted provided that the following conditions

     6  * are met:

     7  * 1. Redistributions of source code must retain the above copyright

     8  *    notice, this list of conditions and the following disclaimer.

     9  * 2. Redistributions in binary form must reproduce the above copyright

    10  *    notice, this list of conditions and the following disclaimer in the

    11  *    documentation and/or other materials provided with the distribution.

    12  *

    13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY

    14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR

    17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

    18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

    19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

    20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

    21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

    22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

    23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

    24  */

    25 

    26 #ifndef CallFrameClosure_h

    27 #define CallFrameClosure_h

    28 

    29 namespace JSC {

    30 

    31 struct CallFrameClosure {

    32     CallFrame* oldCallFrame;

    33     CallFrame* newCallFrame;

    34     JSFunction* function;

    35     FunctionExecutable* functionExecutable;

    36     JSGlobalData* globalData;

    37     Register* oldEnd;

    38     ScopeChainNode* scopeChain;

    39     int expectedParams;

    40     int providedParams;

    41     

    42     void setArgument(int arg, JSValue value)

    43     {

    44         if (arg < expectedParams)

    45             newCallFrame[arg - RegisterFile::CallFrameHeaderSize - expectedParams] = value;

    46         else

    47             newCallFrame[arg - RegisterFile::CallFrameHeaderSize - expectedParams - providedParams] = value;

    48     }

    49 

    50     void resetCallFrame()

    51     {

    52         newCallFrame->setScopeChain(scopeChain);

    53         for (int i = providedParams; i < expectedParams; ++i)

    54             newCallFrame[i - RegisterFile::CallFrameHeaderSize - expectedParams] = jsUndefined();

    55     }

    56 };

    57 

    58 }

    59 

    60 #endif