From 43a97878ce14b72f0981164f87f2e35e14151312 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 11:22:09 +0200 Subject: Adding upstream version 110.0.1. Signed-off-by: Daniel Baumann --- js/src/vm/StringObject.h | 72 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 js/src/vm/StringObject.h (limited to 'js/src/vm/StringObject.h') diff --git a/js/src/vm/StringObject.h b/js/src/vm/StringObject.h new file mode 100644 index 0000000000..ad90e649f0 --- /dev/null +++ b/js/src/vm/StringObject.h @@ -0,0 +1,72 @@ +/* -*- 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_StringObject_h +#define vm_StringObject_h + +#include "vm/JSObject.h" +#include "vm/NativeObject.h" + +namespace js { + +class Shape; + +class StringObject : public NativeObject { + static const unsigned PRIMITIVE_VALUE_SLOT = 0; + static const unsigned LENGTH_SLOT = 1; + + static const ClassSpec classSpec_; + + public: + static const unsigned RESERVED_SLOTS = 2; + + static const JSClass class_; + + /* + * Creates a new String object boxing the given string. The object's + * [[Prototype]] is determined from context. + */ + static inline StringObject* create(JSContext* cx, HandleString str, + HandleObject proto = nullptr, + NewObjectKind newKind = GenericObject); + + /* + * Compute the initial shape to associate with fresh String objects, which + * encodes the initial length property. Return the shape after changing + * |obj|'s last property to it. + */ + static SharedShape* assignInitialShape(JSContext* cx, + Handle obj); + + JSString* unbox() const { + return getFixedSlot(PRIMITIVE_VALUE_SLOT).toString(); + } + + inline size_t length() const { + return size_t(getFixedSlot(LENGTH_SLOT).toInt32()); + } + + static size_t offsetOfPrimitiveValue() { + return getFixedSlotOffset(PRIMITIVE_VALUE_SLOT); + } + static size_t offsetOfLength() { return getFixedSlotOffset(LENGTH_SLOT); } + + private: + static inline bool init(JSContext* cx, Handle obj, + HandleString str); + + static JSObject* createPrototype(JSContext* cx, JSProtoKey key); + + void setStringThis(JSString* str) { + MOZ_ASSERT(getReservedSlot(PRIMITIVE_VALUE_SLOT).isUndefined()); + setFixedSlot(PRIMITIVE_VALUE_SLOT, StringValue(str)); + setFixedSlot(LENGTH_SLOT, Int32Value(int32_t(str->length()))); + } +}; + +} // namespace js + +#endif /* vm_StringObject_h */ -- cgit v1.2.3