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Diffstat (limited to 'js/src/vm/RecordType.h')
-rw-r--r-- | js/src/vm/RecordType.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/js/src/vm/RecordType.h b/js/src/vm/RecordType.h new file mode 100644 index 0000000000..6295ca29e3 --- /dev/null +++ b/js/src/vm/RecordType.h @@ -0,0 +1,78 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * vim: set ts=8 sts=2 et sw=2 tw=80: + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef vm_RecordType_h +#define vm_RecordType_h + +#include <cstdint> +#include <functional> +#include "js/TypeDecls.h" +#include "vm/ArrayObject.h" +#include "vm/NativeObject.h" + +#include "vm/Shape.h" + +namespace JS { +class RecordType; +} + +namespace js { + +extern JSString* RecordToSource(JSContext* cx, JS::RecordType* rec); + +} + +namespace JS { + +class RecordType final : public js::NativeObject { + friend JSString* js::RecordToSource(JSContext* cx, RecordType* rec); + + public: + enum { SORTED_KEYS_SLOT = 0, IS_ATOMIZED_SLOT, SLOT_COUNT }; + + static const js::ClassSpec classSpec_; + static const JSClass class_; + + static RecordType* createUninitialized(JSContext* cx, uint32_t initialLength); + bool initializeNextProperty(JSContext* cx, Handle<PropertyKey> key, + HandleValue value); + bool finishInitialization(JSContext* cx); + static js::Shape* getInitialShape(JSContext* cx); + + static bool copy(JSContext* cx, Handle<RecordType*> in, + MutableHandle<RecordType*> out); + + uint32_t length(); + + bool getOwnProperty(JSContext* cx, HandleId id, MutableHandleValue vp) const; + + static bool sameValueZero(JSContext* cx, RecordType* lhs, RecordType* rhs, + bool* equal); + static bool sameValue(JSContext* cx, RecordType* lhs, RecordType* rhs, + bool* equal); + + js::ArrayObject* keys() const { + return &getFixedSlot(SORTED_KEYS_SLOT).toObject().as<js::ArrayObject>(); + } + + using FieldHasher = std::function<js::HashNumber(const Value& child)>; + js::HashNumber hash(const FieldHasher& hasher); + + bool ensureAtomized(JSContext* cx); + bool isAtomized() const { return getFixedSlot(IS_ATOMIZED_SLOT).toBoolean(); } + + // This can be used to compare atomized records. + static bool sameValueZero(RecordType* lhs, RecordType* rhs); + + private: + template <bool Comparator(JSContext*, HandleValue, HandleValue, bool*)> + static bool sameValueWith(JSContext* cx, RecordType* lhs, RecordType* rhs, + bool* equal); +}; + +} // namespace JS + +#endif |