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/*
* Copyright (C) 2015 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "StructureIDTable.h"
namespace JSC {
enum PutByIdFlags : int32_t {
PutByIdNone = 0,
// This flag indicates that the put_by_id is direct. That means that we store the property without
// checking if the prototype chain has a setter.
PutByIdIsDirect = 0x1,
PutByIdPersistentFlagsMask = 0x1,
// NOTE: The values below must be in sync with what is in LowLevelInterpreter.asm.
// Determining the required inferred type involves first checking the primary type mask, and then
// using that to figure out the meaning of the secondary mask:
// switch (flags & PutByIdPrimaryTypeMask) {
// case PutByIdPrimaryTypeSecondary:
// switch (flags & PutByIdSecondaryTypeMask) {
// ...
// }
// break;
// case PutByIdPrimaryTypeObjectWithStructure:
// case PutByIdPrimaryTypeObjectWithStructureOrOther:
// StructureID structureID = decodeStructureID(flags);
// break;
// }
PutByIdPrimaryTypeMask = 0x6,
PutByIdPrimaryTypeSecondary = 0x0, // Need to check the secondary type mask for the type.
PutByIdPrimaryTypeObjectWithStructure = 0x2, // Secondary type has structure ID.
PutByIdPrimaryTypeObjectWithStructureOrOther = 0x4, // Secondary type has structure ID.
PutByIdSecondaryTypeMask = -0x8,
PutByIdSecondaryTypeBottom = 0x0,
PutByIdSecondaryTypeBoolean = 0x8,
PutByIdSecondaryTypeOther = 0x10,
PutByIdSecondaryTypeInt32 = 0x18,
PutByIdSecondaryTypeNumber = 0x20,
PutByIdSecondaryTypeString = 0x28,
PutByIdSecondaryTypeSymbol = 0x30,
PutByIdSecondaryTypeObject = 0x38,
PutByIdSecondaryTypeObjectOrOther = 0x40,
PutByIdSecondaryTypeTop = 0x48
};
inline PutByIdFlags encodeStructureID(StructureID id)
{
#if USE(JSVALUE64)
return static_cast<PutByIdFlags>(static_cast<PutByIdFlags>(id) << 3);
#else
PutByIdFlags result = bitwise_cast<PutByIdFlags>(id);
ASSERT(!(result & ~PutByIdSecondaryTypeMask));
return result;
#endif
}
inline StructureID decodeStructureID(PutByIdFlags flags)
{
#if USE(JSVALUE64)
return static_cast<StructureID>(flags >> 3);
#else
return bitwise_cast<StructureID>(flags & PutByIdSecondaryTypeMask);
#endif
}
} // namespace JSC
namespace WTF {
class PrintStream;
void printInternal(PrintStream&, JSC::PutByIdFlags);
} // namespace WTF