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      1 /*
      2  * Copyright (C) 2011 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. AND ITS CONTRIBUTORS ``AS IS''
     14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
     15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
     17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     23  * THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "JSParser.h"
     27 #include <wtf/Vector.h>
     28 #include <wtf/text/WTFString.h>
     29 
     30 namespace JSC {
     31 
     32 class SourceProviderCacheItem {
     33 public:
     34     SourceProviderCacheItem(int closeBraceLine, int closeBracePos)
     35         : closeBraceLine(closeBraceLine)
     36         , closeBracePos(closeBracePos)
     37     {
     38     }
     39     unsigned approximateByteSize() const
     40     {
     41         // The identifiers are uniqued strings so most likely there are few names that actually use any additional memory.
     42         static const unsigned assummedAverageIdentifierSize = sizeof(RefPtr<StringImpl>) + 2;
     43         unsigned size = sizeof(*this);
     44         size += usedVariables.size() * assummedAverageIdentifierSize;
     45         size += writtenVariables.size() * assummedAverageIdentifierSize;
     46         return size;
     47     }
     48     JSToken closeBraceToken() const
     49     {
     50         JSToken token;
     51         token.m_type = CLOSEBRACE;
     52         token.m_data.intValue = closeBracePos;
     53         token.m_info.startOffset = closeBracePos;
     54         token.m_info.endOffset = closeBracePos + 1;
     55         token.m_info.line = closeBraceLine;
     56         return token;
     57     }
     58 
     59     int closeBraceLine;
     60     int closeBracePos;
     61     bool usesEval;
     62     Vector<RefPtr<StringImpl> > usedVariables;
     63     Vector<RefPtr<StringImpl> > writtenVariables;
     64 };
     65 
     66 }
     67