mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-23 04:09:40 +00:00
106 lines
4.2 KiB
C++
106 lines
4.2 KiB
C++
/*
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* Copyright (C) 2008, 2010 Apple Inc. All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "SmallStrings.h"
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#include "JSCJSValueInlines.h"
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#include <wtf/text/StringImpl.h>
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namespace JSC {
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SmallStrings::SmallStrings()
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{
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COMPILE_ASSERT(singleCharacterStringCount == sizeof(m_singleCharacterStrings) / sizeof(m_singleCharacterStrings[0]), IsNumCharactersConstInSyncWithClassUsage);
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for (unsigned i = 0; i < singleCharacterStringCount; ++i)
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m_singleCharacterStrings[i] = nullptr;
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}
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void SmallStrings::initializeCommonStrings(VM& vm)
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{
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ASSERT(!m_emptyString);
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m_emptyString = JSString::createEmptyString(vm);
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ASSERT(m_needsToBeVisited);
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for (unsigned i = 0; i < singleCharacterStringCount; ++i) {
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ASSERT(!m_singleCharacterStrings[i]);
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const LChar string[] = { static_cast<LChar>(i) };
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m_singleCharacterStrings[i] = JSString::createHasOtherOwner(vm, AtomStringImpl::add(string, 1).releaseNonNull());
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ASSERT(m_needsToBeVisited);
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}
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#define JSC_COMMON_STRINGS_ATTRIBUTE_INITIALIZE(name) initialize(&vm, m_##name, #name);
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JSC_COMMON_STRINGS_EACH_NAME(JSC_COMMON_STRINGS_ATTRIBUTE_INITIALIZE)
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#undef JSC_COMMON_STRINGS_ATTRIBUTE_INITIALIZE
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initialize(&vm, m_objectStringStart, "[object ");
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initialize(&vm, m_nullObjectString, "[object Null]");
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initialize(&vm, m_undefinedObjectString, "[object Undefined]");
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initialize(&vm, m_boundPrefixString, "bound ");
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initialize(&vm, m_notEqualString, "not-equal");
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initialize(&vm, m_timedOutString, "timed-out");
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initialize(&vm, m_okString, "ok");
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setIsInitialized(true);
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}
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void SmallStrings::visitStrongReferences(SlotVisitor& visitor)
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{
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m_needsToBeVisited = false;
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visitor.appendUnbarriered(m_emptyString);
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for (unsigned i = 0; i <= maxSingleCharacterString; ++i)
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visitor.appendUnbarriered(m_singleCharacterStrings[i]);
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#define JSC_COMMON_STRINGS_ATTRIBUTE_VISIT(name) visitor.appendUnbarriered(m_##name);
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JSC_COMMON_STRINGS_EACH_NAME(JSC_COMMON_STRINGS_ATTRIBUTE_VISIT)
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#undef JSC_COMMON_STRINGS_ATTRIBUTE_VISIT
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visitor.appendUnbarriered(m_objectStringStart);
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visitor.appendUnbarriered(m_nullObjectString);
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visitor.appendUnbarriered(m_undefinedObjectString);
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visitor.appendUnbarriered(m_boundPrefixString);
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visitor.appendUnbarriered(m_notEqualString);
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visitor.appendUnbarriered(m_timedOutString);
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visitor.appendUnbarriered(m_okString);
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}
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SmallStrings::~SmallStrings()
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{
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}
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Ref<StringImpl> SmallStrings::singleCharacterStringRep(unsigned char character)
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{
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if (LIKELY(m_isInitialized))
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return *const_cast<StringImpl*>(m_singleCharacterStrings[character]->tryGetValueImpl());
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const LChar string[] = { static_cast<LChar>(character) };
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return AtomStringImpl::add(string, 1).releaseNonNull();
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}
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void SmallStrings::initialize(VM* vm, JSString*& string, const char* value)
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{
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string = JSString::create(*vm, AtomStringImpl::add(value).releaseNonNull());
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ASSERT(m_needsToBeVisited);
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}
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} // namespace JSC
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