webkitgtk-2.10.2webkitgtk-2.10.2

1 files changed, 153 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/parser/SourceProviderCacheItem.h b/Source/JavaScriptCore/parser/SourceProviderCacheItem.h
new file mode 100644
index 000000000..81d221b39
--- /dev/null
+++ b/Source/JavaScriptCore/parser/SourceProviderCacheItem.h
@@ -0,0 +1,153 @@
+/*
+ * 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.
+ */
+
+#ifndef SourceProviderCacheItem_h
+#define SourceProviderCacheItem_h
+
+#include "ParserTokens.h"
+#include <wtf/Vector.h>
+#include <wtf/text/UniquedStringImpl.h>
+#include <wtf/text/WTFString.h>
+
+namespace JSC {
+
+struct SourceProviderCacheItemCreationParameters {
+    unsigned functionNameStart;
+    unsigned lastTockenLine;
+    unsigned lastTockenStartOffset;
+    unsigned lastTockenEndOffset;
+    unsigned lastTockenLineStartOffset;
+    unsigned endFunctionOffset;
+    unsigned parameterCount;
+    bool needsFullActivation;
+    bool usesEval;
+    bool strictMode;
+    Vector<RefPtr<UniquedStringImpl>> usedVariables;
+    Vector<RefPtr<UniquedStringImpl>> writtenVariables;
+    bool isBodyArrowExpression { false };
+    JSTokenType tokenType { CLOSEBRACE };
+};
+
+#if COMPILER(MSVC)
+#pragma warning(push)
+#pragma warning(disable: 4200) // Disable "zero-sized array in struct/union" warning
+#endif
+
+class SourceProviderCacheItem {
+    WTF_MAKE_FAST_ALLOCATED;
+public:
+    static std::unique_ptr<SourceProviderCacheItem> create(const SourceProviderCacheItemCreationParameters&);
+    ~SourceProviderCacheItem();
+
+    JSToken endFunctionToken() const 
+    {
+        JSToken token;
+        token.m_type = isBodyArrowExpression ? tokenType : CLOSEBRACE;
+        token.m_data.offset = lastTockenStartOffset;
+        token.m_location.startOffset = lastTockenStartOffset;
+        token.m_location.endOffset = lastTockenEndOffset;
+        token.m_location.line = lastTockenLine;
+        token.m_location.lineStartOffset = lastTockenLineStartOffset;
+        // token.m_location.sourceOffset is initialized once by the client. So,
+        // we do not need to set it here.
+        return token;
+    }
+
+    unsigned functionNameStart : 31;
+    bool needsFullActivation : 1;
+
+    unsigned endFunctionOffset : 31;
+    unsigned lastTockenLine : 31;
+    unsigned lastTockenStartOffset : 31;
+    unsigned lastTockenEndOffset: 31;
+    unsigned parameterCount;
+    
+    bool usesEval : 1;
+
+    bool strictMode : 1;
+
+    unsigned lastTockenLineStartOffset;
+    unsigned usedVariablesCount;
+    unsigned writtenVariablesCount;
+
+    UniquedStringImpl** usedVariables() const { return const_cast<UniquedStringImpl**>(m_variables); }
+    UniquedStringImpl** writtenVariables() const { return const_cast<UniquedStringImpl**>(&m_variables[usedVariablesCount]); }
+    bool isBodyArrowExpression;
+    JSTokenType tokenType;
+
+private:
+    SourceProviderCacheItem(const SourceProviderCacheItemCreationParameters&);
+
+    UniquedStringImpl* m_variables[0];
+};
+
+inline SourceProviderCacheItem::~SourceProviderCacheItem()
+{
+    for (unsigned i = 0; i < usedVariablesCount + writtenVariablesCount; ++i)
+        m_variables[i]->deref();
+}
+
+inline std::unique_ptr<SourceProviderCacheItem> SourceProviderCacheItem::create(const SourceProviderCacheItemCreationParameters& parameters)
+{
+    size_t variableCount = parameters.writtenVariables.size() + parameters.usedVariables.size();
+    size_t objectSize = sizeof(SourceProviderCacheItem) + sizeof(UniquedStringImpl*) * variableCount;
+    void* slot = fastMalloc(objectSize);
+    return std::unique_ptr<SourceProviderCacheItem>(new (slot) SourceProviderCacheItem(parameters));
+}
+
+inline SourceProviderCacheItem::SourceProviderCacheItem(const SourceProviderCacheItemCreationParameters& parameters)
+    : functionNameStart(parameters.functionNameStart)
+    , needsFullActivation(parameters.needsFullActivation)
+    , endFunctionOffset(parameters.endFunctionOffset)
+    , lastTockenLine(parameters.lastTockenLine)
+    , lastTockenStartOffset(parameters.lastTockenStartOffset)
+    , lastTockenEndOffset(parameters.lastTockenEndOffset)
+    , parameterCount(parameters.parameterCount)
+    , usesEval(parameters.usesEval)
+    , strictMode(parameters.strictMode)
+    , lastTockenLineStartOffset(parameters.lastTockenLineStartOffset)
+    , usedVariablesCount(parameters.usedVariables.size())
+    , writtenVariablesCount(parameters.writtenVariables.size())
+    , isBodyArrowExpression(parameters.isBodyArrowExpression)
+    , tokenType(parameters.tokenType)
+{
+    unsigned j = 0;
+    for (unsigned i = 0; i < usedVariablesCount; ++i, ++j) {
+        m_variables[j] = parameters.usedVariables[i].get();
+        m_variables[j]->ref();
+    }
+    for (unsigned i = 0; i < writtenVariablesCount; ++i, ++j) {
+        m_variables[j] = parameters.writtenVariables[i].get();
+        m_variables[j]->ref();
+    }
+}
+
+#if COMPILER(MSVC)
+#pragma warning(pop)
+#endif
+
+}
+
+#endif // SourceProviderCacheItem_h