source: webkit/trunk/Source/JavaScriptCore/parser/UnlinkedSourceCode.h

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* modification, are permitted provided that the following conditions
* are met:
*
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#pragma once

#include "SourceProvider.h"
#include <wtf/RefPtr.h>

namespace JSC {

class UnlinkedSourceCode {
template<typename SourceType>
friend class CachedUnlinkedSourceCodeShape;
friend class CachedSourceCodeWithoutProvider;

public:
UnlinkedSourceCode()
: m_provider(nullptr)
, m_startOffset(0)
, m_endOffset(0)
{
}

UnlinkedSourceCode(WTF::HashTableDeletedValueType)
: m_provider(WTF::HashTableDeletedValue)
{
}

UnlinkedSourceCode(Ref<SourceProvider>&& provider)
: m_provider(WTFMove(provider))
, m_startOffset(0)
, m_endOffset(m_provider->source().length())
{
}

UnlinkedSourceCode(Ref<SourceProvider>&& provider, int startOffset, int endOffset)
: m_provider(WTFMove(provider))
, m_startOffset(startOffset)
, m_endOffset(endOffset)
{
}

UnlinkedSourceCode(RefPtr<SourceProvider>&& provider, int startOffset, int endOffset)
: m_provider(WTFMove(provider))
, m_startOffset(startOffset)
, m_endOffset(endOffset)
{
}

bool isHashTableDeletedValue() const { return m_provider.isHashTableDeletedValue(); }

SourceProvider& provider() const
{
return *m_provider;
}

unsigned hash() const
{
ASSERT(m_provider);
return m_provider->hash();
}

StringView view() const
{
if (!m_provider)
return StringView();
return m_provider->getRange(m_startOffset, m_endOffset);
}

CString toUTF8() const;

bool isNull() const { return !m_provider; }
int startOffset() const { return m_startOffset; }
int endOffset() const { return m_endOffset; }
int length() const { return m_endOffset - m_startOffset; }

protected:
// FIXME: Make it Ref<SourceProvidier>.
// https://bugs.webkit.org/show_bug.cgi?id=168325
RefPtr<SourceProvider> m_provider;
int m_startOffset;
int m_endOffset;
};

} // namespace JSC