mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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120 lines
5.0 KiB
C++
120 lines
5.0 KiB
C++
/*
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* Copyright (C) 2020 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. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "IntlSegments.h"
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#include "IntlObjectInlines.h"
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#include "IntlSegmentIterator.h"
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#include "JSCInlines.h"
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#include "ObjectConstructor.h"
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#include <unicode/ucurr.h>
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#include <unicode/uloc.h>
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#include <wtf/unicode/icu/ICUHelpers.h>
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namespace JSC {
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const ClassInfo IntlSegments::s_info = { "Object", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(IntlSegments) };
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IntlSegments* IntlSegments::create(VM& vm, Structure* structure, std::unique_ptr<UBreakIterator, UBreakIteratorDeleter>&& segmenter, Box<Vector<UChar>>&& buffer, JSString* string, IntlSegmenter::Granularity granularity)
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{
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auto* object = new (NotNull, allocateCell<IntlSegments>(vm.heap)) IntlSegments(vm, structure, WTFMove(segmenter), WTFMove(buffer), granularity);
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object->finishCreation(vm, string);
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return object;
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}
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Structure* IntlSegments::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
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{
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return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
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}
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IntlSegments::IntlSegments(VM& vm, Structure* structure, std::unique_ptr<UBreakIterator, UBreakIteratorDeleter>&& segmenter, Box<Vector<UChar>>&& buffer, IntlSegmenter::Granularity granularity)
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: Base(vm, structure)
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, m_segmenter(WTFMove(segmenter))
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, m_buffer(WTFMove(buffer))
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, m_granularity(granularity)
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{
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}
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void IntlSegments::finishCreation(VM& vm, JSString* string)
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{
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Base::finishCreation(vm);
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ASSERT(inherits(vm, info()));
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m_string.set(vm, this, string);
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}
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// https://tc39.es/proposal-intl-segmenter/#sec-intl.segmenter.prototype.containing
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JSValue IntlSegments::containing(JSGlobalObject* globalObject, JSValue indexValue)
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{
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VM& vm = globalObject->vm();
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auto scope = DECLARE_THROW_SCOPE(vm);
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double value = indexValue.toInteger(globalObject);
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RETURN_IF_EXCEPTION(scope, { });
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if (value < 0 || value >= m_buffer->size())
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return jsUndefined();
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int32_t index = toInt32(value);
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// The result of ubrk_preceding is always *smaller* than offset, or UBRK_DONE. In this case, we should set scan position with `index + 1`.
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// Even if index + 1 exceeds length of string by 1, this is desirable if we want to scan the last segment.
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int32_t startIndex = ubrk_preceding(m_segmenter.get(), index + 1);
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if (startIndex == UBRK_DONE)
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startIndex = 0;
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// The result of ubrk_following is always greater than offset, or UBRK_DONE. Scan position should be `index`.
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int32_t endIndex = ubrk_following(m_segmenter.get(), index);
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if (endIndex == UBRK_DONE)
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endIndex = m_buffer->size();
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scope.release();
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return IntlSegmenter::createSegmentDataObject(globalObject, m_string.get(), startIndex, endIndex, *m_segmenter, m_granularity);
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}
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// https://tc39.es/proposal-intl-segmenter/#sec-%segmentsprototype%-@@iterator
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JSObject* IntlSegments::createSegmentIterator(JSGlobalObject* globalObject)
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{
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VM& vm = globalObject->vm();
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auto scope = DECLARE_THROW_SCOPE(vm);
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UErrorCode status = U_ZERO_ERROR;
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auto segmenter = std::unique_ptr<UBreakIterator, UBreakIteratorDeleter>(ubrk_safeClone(m_segmenter.get(), nullptr, nullptr, &status));
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if (U_FAILURE(status)) {
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throwTypeError(globalObject, scope, "failed to initialize SegmentIterator"_s);
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return nullptr;
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}
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ubrk_first(segmenter.get());
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return IntlSegmentIterator::create(vm, globalObject->segmentIteratorStructure(), WTFMove(segmenter), m_buffer, m_string.get(), m_granularity);
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}
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void IntlSegments::visitChildren(JSCell* cell, SlotVisitor& visitor)
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{
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auto* thisObject = jsCast<IntlSegments*>(cell);
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Base::visitChildren(thisObject, visitor);
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visitor.append(thisObject->m_string);
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}
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} // namespace JSC
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