js/src/vm/Id.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * vim: set ts=8 sts=2 et sw=2 tw=80:
   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 #include "js/Id.h"
   8 #include "js/RootingAPI.h"
   9
  10 #include "vm/JSContext.h"
  11 #include "vm/SymbolType.h"
  12
  13 #include "vm/JSAtomUtils-inl.h"  // AtomToId
  14
  15 using namespace js;
  16
  17 static const JS::PropertyKey voidKeyValue = JS::PropertyKey::Void();
  18
  19 const JS::HandleId JS::VoidHandlePropertyKey =
  20     JS::HandleId::fromMarkedLocation(&voidKeyValue);
  21
  22 bool JS::PropertyKey::isPrivateName() const {
  23   return isSymbol() && toSymbol()->isPrivateName();
  24 }
  25
  26 bool JS::PropertyKey::isWellKnownSymbol(JS::SymbolCode code) const {
  27   MOZ_ASSERT(uint32_t(code) < WellKnownSymbolLimit);
  28   if (!isSymbol()) {
  29     return false;
  30   }
  31   return toSymbol()->code() == code;
  32 }
  33
  34 /* static */ JS::PropertyKey JS::PropertyKey::fromPinnedString(JSString* str) {
  35   MOZ_ASSERT(AtomIsPinned(TlsContext.get(), &str->asAtom()));
  36   return js::AtomToId(&str->asAtom());
  37 }
  38
  39 /* static */ bool JS::PropertyKey::isNonIntAtom(JSAtom* atom) {
  40   uint32_t index;
  41   if (!atom->isIndex(&index)) {
  42     return true;
  43   }
  44   static_assert(PropertyKey::IntMin == 0);
  45   return index > PropertyKey::IntMax;
  46 }
  47
  48 /* static */ bool JS::PropertyKey::isNonIntAtom(JSString* str) {
  49   return JS::PropertyKey::isNonIntAtom(&str->asAtom());
  50 }