The Tor Browser / file comparison
comparison: js/src/vm/StringObject.h
js/src/vm/StringObject.h
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:c8c2a763153a |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- | |
| 2 * vim: set ts=8 sts=4 et sw=4 tw=99: | |
| 3 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #ifndef vm_StringObject_h | |
| 8 #define vm_StringObject_h | |
| 9 | |
| 10 #include "jsobj.h" | |
| 11 #include "jsstr.h" | |
| 12 | |
| 13 #include "vm/Shape.h" | |
| 14 | |
| 15 namespace js { | |
| 16 | |
| 17 class StringObject : public JSObject | |
| 18 { | |
| 19 static const unsigned PRIMITIVE_VALUE_SLOT = 0; | |
| 20 static const unsigned LENGTH_SLOT = 1; | |
| 21 | |
| 22 public: | |
| 23 static const unsigned RESERVED_SLOTS = 2; | |
| 24 | |
| 25 static const Class class_; | |
| 26 | |
| 27 /* | |
| 28 * Creates a new String object boxing the given string. The object's | |
| 29 * [[Prototype]] is determined from context. | |
| 30 */ | |
| 31 static inline StringObject *create(JSContext *cx, HandleString str, | |
| 32 NewObjectKind newKind = GenericObject); | |
| 33 | |
| 34 JSString *unbox() const { | |
| 35 return getFixedSlot(PRIMITIVE_VALUE_SLOT).toString(); | |
| 36 } | |
| 37 | |
| 38 inline size_t length() const { | |
| 39 return size_t(getFixedSlot(LENGTH_SLOT).toInt32()); | |
| 40 } | |
| 41 | |
| 42 static size_t offsetOfPrimitiveValue() { | |
| 43 return getFixedSlotOffset(PRIMITIVE_VALUE_SLOT); | |
| 44 } | |
| 45 static size_t offsetOfLength() { | |
| 46 return getFixedSlotOffset(LENGTH_SLOT); | |
| 47 } | |
| 48 | |
| 49 private: | |
| 50 inline bool init(JSContext *cx, HandleString str); | |
| 51 | |
| 52 void setStringThis(JSString *str) { | |
| 53 JS_ASSERT(getReservedSlot(PRIMITIVE_VALUE_SLOT).isUndefined()); | |
| 54 setFixedSlot(PRIMITIVE_VALUE_SLOT, StringValue(str)); | |
| 55 setFixedSlot(LENGTH_SLOT, Int32Value(int32_t(str->length()))); | |
| 56 } | |
| 57 | |
| 58 /* For access to init, as String.prototype is special. */ | |
| 59 friend JSObject * | |
| 60 ::js_InitStringClass(JSContext *cx, js::HandleObject global); | |
| 61 | |
| 62 /* For access to assignInitialShape. */ | |
| 63 friend bool | |
| 64 EmptyShape::ensureInitialCustomShape<StringObject>(ExclusiveContext *cx, | |
| 65 Handle<StringObject*> obj); | |
| 66 | |
| 67 /* | |
| 68 * Compute the initial shape to associate with fresh String objects, which | |
| 69 * encodes the initial length property. Return the shape after changing | |
| 70 * |obj|'s last property to it. | |
| 71 */ | |
| 72 static Shape * | |
| 73 assignInitialShape(ExclusiveContext *cx, Handle<StringObject*> obj); | |
| 74 }; | |
| 75 | |
| 76 } // namespace js | |
| 77 | |
| 78 #endif /* vm_StringObject_h */ |
