JavaScriptCore-903.tar.gz

[apple/javascriptcore.git] / parser / SourceProviderCacheItem.h

diff --git a/parser/SourceProviderCacheItem.h b/parser/SourceProviderCacheItem.h
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+++ b/parser/SourceProviderCacheItem.h
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+/*
+ * Copyright (C) 2011 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    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. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "JSParser.h"
+#include <wtf/Vector.h>
+#include <wtf/text/WTFString.h>
+
+namespace JSC {
+
+class SourceProviderCacheItem {
+public:
+    SourceProviderCacheItem(int closeBraceLine, int closeBracePos)
+        : closeBraceLine(closeBraceLine) 
+        , closeBracePos(closeBracePos)
+    {
+    }
+    unsigned approximateByteSize() const
+    {
+        // The identifiers are uniqued strings so most likely there are few names that actually use any additional memory.
+        static const unsigned assummedAverageIdentifierSize = sizeof(RefPtr<StringImpl>) + 2;
+        unsigned size = sizeof(*this);
+        size += usedVariables.size() * assummedAverageIdentifierSize;
+        size += writtenVariables.size() * assummedAverageIdentifierSize;
+        return size;
+    }
+    JSToken closeBraceToken() const 
+    {
+        JSToken token;
+        token.m_type = CLOSEBRACE;
+        token.m_data.intValue = closeBracePos;
+        token.m_info.startOffset = closeBracePos;
+        token.m_info.endOffset = closeBracePos + 1;
+        token.m_info.line = closeBraceLine; 
+        return token;
+    }
+    
+    int closeBraceLine;
+    int closeBracePos;
+    bool usesEval;
+    Vector<RefPtr<StringImpl> > usedVariables;
+    Vector<RefPtr<StringImpl> > writtenVariables;
+};
+
+}