mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-23 04:09:40 +00:00
93 lines
3.5 KiB
C++
93 lines
3.5 KiB
C++
/*
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* Copyright (C) 2014-2017 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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#pragma once
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#include "CellState.h"
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#include "IndexingType.h"
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#include "JSTypeInfo.h"
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#include "StructureIDTable.h"
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namespace JSC {
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class StructureIDBlob {
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friend class LLIntOffsetsExtractor;
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public:
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StructureIDBlob()
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{
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u.doubleWord = 0xbbadbeef;
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}
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StructureIDBlob(StructureID structureID, IndexingType indexingModeIncludingHistory, const TypeInfo& typeInfo)
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{
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u.fields.structureID = structureID;
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u.fields.indexingModeIncludingHistory = indexingModeIncludingHistory;
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u.fields.type = typeInfo.type();
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u.fields.inlineTypeFlags = typeInfo.inlineTypeFlags();
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u.fields.defaultCellState = CellState::DefinitelyWhite;
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}
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void operator=(const StructureIDBlob& other) { u.doubleWord = other.u.doubleWord; }
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StructureID structureID() const { return u.fields.structureID; }
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IndexingType indexingModeIncludingHistory() const { return u.fields.indexingModeIncludingHistory; }
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void setIndexingModeIncludingHistory(IndexingType indexingModeIncludingHistory) { u.fields.indexingModeIncludingHistory = indexingModeIncludingHistory; }
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JSType type() const { return u.fields.type; }
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TypeInfo::InlineTypeFlags inlineTypeFlags() const { return u.fields.inlineTypeFlags; }
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TypeInfo typeInfo(TypeInfo::OutOfLineTypeFlags outOfLineTypeFlags) const { return TypeInfo(type(), inlineTypeFlags(), outOfLineTypeFlags); }
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int32_t blobExcludingStructureID() const { return u.words.word2; }
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int64_t blob() const { return u.doubleWord; }
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static ptrdiff_t structureIDOffset()
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{
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return OBJECT_OFFSETOF(StructureIDBlob, u.fields.structureID);
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}
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static ptrdiff_t indexingModeIncludingHistoryOffset()
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{
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return OBJECT_OFFSETOF(StructureIDBlob, u.fields.indexingModeIncludingHistory);
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}
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private:
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union {
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struct {
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StructureID structureID;
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IndexingType indexingModeIncludingHistory;
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JSType type;
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TypeInfo::InlineTypeFlags inlineTypeFlags;
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CellState defaultCellState;
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} fields;
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struct {
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int32_t word1;
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int32_t word2;
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} words;
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int64_t doubleWord;
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} u;
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};
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} // namespace JSC
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