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/*
* Copyright (C) 2006-2019 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#pragma once
#include <wtf/TypeCasts.h>
#include <wtf/text/UniquedStringImpl.h>
namespace WTF {
class AtomStringTable;
class SUPPRESS_REFCOUNTED_WITHOUT_VIRTUAL_DESTRUCTOR AtomStringImpl final : public UniquedStringImpl {
public:
WTF_EXPORT_PRIVATE static RefPtr<AtomStringImpl> lookUp(std::span<const LChar>);
WTF_EXPORT_PRIVATE static RefPtr<AtomStringImpl> lookUp(std::span<const UChar>);
static RefPtr<AtomStringImpl> lookUp(StringImpl*);
static void remove(AtomStringImpl*);
WTF_EXPORT_PRIVATE static RefPtr<AtomStringImpl> add(std::span<const LChar>);
WTF_EXPORT_PRIVATE static RefPtr<AtomStringImpl> add(std::span<const UChar>);
ALWAYS_INLINE static RefPtr<AtomStringImpl> add(std::span<const char> characters);
WTF_EXPORT_PRIVATE static RefPtr<AtomStringImpl> add(HashTranslatorCharBuffer<LChar>&);
WTF_EXPORT_PRIVATE static RefPtr<AtomStringImpl> add(HashTranslatorCharBuffer<UChar>&);
WTF_EXPORT_PRIVATE static RefPtr<AtomStringImpl> add(StringImpl*, unsigned offset, unsigned length);
ALWAYS_INLINE static RefPtr<AtomStringImpl> add(StringImpl*);
ALWAYS_INLINE static RefPtr<AtomStringImpl> add(RefPtr<StringImpl>&&);
WTF_EXPORT_PRIVATE static RefPtr<AtomStringImpl> add(const StaticStringImpl*);
ALWAYS_INLINE static Ref<AtomStringImpl> add(ASCIILiteral);
// Returns null if the input data contains an invalid UTF-8 sequence.
static RefPtr<AtomStringImpl> add(std::span<const char8_t>);
#if USE(CF)
WTF_EXPORT_PRIVATE static RefPtr<AtomStringImpl> add(CFStringRef);
#endif
template<typename StringTableProvider>
ALWAYS_INLINE static RefPtr<AtomStringImpl> addWithStringTableProvider(StringTableProvider&, StringImpl*);
#if ASSERT_ENABLED
WTF_EXPORT_PRIVATE static bool isInAtomStringTable(StringImpl*);
#endif
private:
AtomStringImpl() = delete;
ALWAYS_INLINE static Ref<AtomStringImpl> add(StringImpl&);
ALWAYS_INLINE static Ref<AtomStringImpl> add(Ref<StringImpl>&&);
WTF_EXPORT_PRIVATE static Ref<AtomStringImpl> addLiteral(std::span<const LChar>);
ALWAYS_INLINE static Ref<AtomStringImpl> add(AtomStringTable&, StringImpl&);
WTF_EXPORT_PRIVATE static Ref<AtomStringImpl> addSlowCase(StringImpl&);
WTF_EXPORT_PRIVATE static Ref<AtomStringImpl> addSlowCase(Ref<StringImpl>&&);
WTF_EXPORT_PRIVATE static Ref<AtomStringImpl> addSlowCase(AtomStringTable&, StringImpl&);
WTF_EXPORT_PRIVATE static RefPtr<AtomStringImpl> lookUpSlowCase(StringImpl&);
};
inline RefPtr<AtomStringImpl> AtomStringImpl::lookUp(StringImpl* string)
{
if (!string)
return nullptr;
if (auto* atom = dynamicDowncast<AtomStringImpl>(*string))
return atom;
return lookUpSlowCase(*string);
}
ALWAYS_INLINE RefPtr<AtomStringImpl> AtomStringImpl::add(std::span<const char> characters)
{
return add(byteCast<LChar>(characters));
}
ALWAYS_INLINE RefPtr<AtomStringImpl> AtomStringImpl::add(StringImpl* string)
{
if (!string)
return nullptr;
return add(*string);
}
ALWAYS_INLINE RefPtr<AtomStringImpl> AtomStringImpl::add(RefPtr<StringImpl>&& string)
{
if (!string)
return nullptr;
return add(string.releaseNonNull());
}
ALWAYS_INLINE Ref<AtomStringImpl> AtomStringImpl::add(ASCIILiteral literal)
{
return addLiteral(literal.span8());
}
template<typename StringTableProvider>
ALWAYS_INLINE RefPtr<AtomStringImpl> AtomStringImpl::addWithStringTableProvider(StringTableProvider& stringTableProvider, StringImpl* string)
{
if (!string)
return nullptr;
return add(*stringTableProvider.atomStringTable(), *string);
}
ALWAYS_INLINE Ref<AtomStringImpl> AtomStringImpl::add(StringImpl& string)
{
if (auto* atom = dynamicDowncast<AtomStringImpl>(string)) {
ASSERT_WITH_MESSAGE(!string.length() || isInAtomStringTable(&string), "The atom string comes from an other thread!");
return *atom;
}
return addSlowCase(string);
}
ALWAYS_INLINE Ref<AtomStringImpl> AtomStringImpl::add(Ref<StringImpl>&& string)
{
if (string->isAtom()) {
ASSERT_WITH_MESSAGE(!string->length() || isInAtomStringTable(string.ptr()), "The atom string comes from an other thread!");
return static_reference_cast<AtomStringImpl>(WTFMove(string));
}
return addSlowCase(WTFMove(string));
}
ALWAYS_INLINE Ref<AtomStringImpl> AtomStringImpl::add(AtomStringTable& stringTable, StringImpl& string)
{
if (auto* atom = dynamicDowncast<AtomStringImpl>(string)) {
ASSERT_WITH_MESSAGE(!string.length() || isInAtomStringTable(&string), "The atom string comes from an other thread!");
return *atom;
}
return addSlowCase(stringTable, string);
}
#if ASSERT_ENABLED
// AtomStringImpls created from StaticStringImpl will ASSERT in the generic ValueCheck<T>::checkConsistency,
// as they are not allocated by fastMalloc. We don't currently have any way to detect that case, so we don't
// do any consistency check for AtomStringImpl*.
template<> struct ValueCheck<AtomStringImpl*> {
static void checkConsistency(const AtomStringImpl*) { }
};
template<> struct ValueCheck<const AtomStringImpl*> {
static void checkConsistency(const AtomStringImpl*) { }
};
#endif // ASSERT_ENABLED
} // namespace WTF
SPECIALIZE_TYPE_TRAITS_BEGIN(WTF::AtomStringImpl) \
static bool isType(const WTF::StringImpl& string) { return string.isAtom(); } \
SPECIALIZE_TYPE_TRAITS_END()
using WTF::AtomStringImpl;
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