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
29namespace JSC {
30
31struct 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
61