parser/SourceProviderCacheItem.h

   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 }