js/src/vm/WellKnownAtom.h

   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 #ifndef vm_WellKnownAtom_h
   8 #define vm_WellKnownAtom_h
   9
  10 #include "mozilla/HashFunctions.h"  // mozilla::HashNumber, mozilla::HashStringKnownLength
  11
  12 #include <stdint.h>  // uint32_t
  13
  14 #include "js/ProtoKey.h"             // JS_FOR_EACH_PROTOTYPE
  15 #include "js/Symbol.h"               // JS_FOR_EACH_WELL_KNOWN_SYMBOL
  16 #include "vm/CommonPropertyNames.h"  // FOR_EACH_COMMON_PROPERTYNAME
  17
  18 namespace js {
  19
  20 // An index for well-known atoms.
  21 //
  22 // GetWellKnownAtom in ParserAtom.cpp relies on the fact that
  23 // JSAtomState fields and this enum variants use the same order.
  24 enum class WellKnownAtomId : uint32_t {
  25 #define ENUM_ENTRY_(NAME, _) NAME,
  26   FOR_EACH_COMMON_PROPERTYNAME(ENUM_ENTRY_)
  27 #undef ENUM_ENTRY_
  28
  29 #define ENUM_ENTRY_(NAME, _) NAME,
  30       JS_FOR_EACH_PROTOTYPE(ENUM_ENTRY_)
  31 #undef ENUM_ENTRY_
  32
  33 #define ENUM_ENTRY_(NAME) NAME,
  34           JS_FOR_EACH_WELL_KNOWN_SYMBOL(ENUM_ENTRY_)
  35 #undef ENUM_ENTRY_
  36
  37               Limit,
  38 };
  39
  40 struct WellKnownAtomInfo {
  41   uint32_t length;
  42   mozilla::HashNumber hash;
  43   const char* content;
  44 };
  45
  46 extern WellKnownAtomInfo wellKnownAtomInfos[];
  47
  48 inline const WellKnownAtomInfo& GetWellKnownAtomInfo(WellKnownAtomId atomId) {
  49   return wellKnownAtomInfos[uint32_t(atomId)];
  50 }
  51
  52 } /* namespace js */
  53
  54 #endif  // vm_WellKnownAtom_h