dom/bindings/Date.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 "mozilla/dom/Date.h"
   8
   9 #include "jsapi.h" // for JS_ObjectIsDate, JS_NewDateObjectMsec
  10 #include "jsfriendapi.h" // for js_DateGetMsecSinceEpoch
  11 #include "js/RootingAPI.h" // for Rooted, MutableHandle
  12 #include "js/Value.h" // for Value
  13 #include "jswrapper.h" // for CheckedUnwrap
  14 #include "mozilla/FloatingPoint.h" // for IsNaN, UnspecifiedNaN
  15
  16 namespace mozilla {
  17 namespace dom {
  18
  19 Date::Date()
  20   : mMsecSinceEpoch(UnspecifiedNaN<double>())
  21 {
  22 }
  23
  24 bool
  25 Date::IsUndefined() const
  26 {
  27   return IsNaN(mMsecSinceEpoch);
  28 }
  29
  30 bool
  31 Date::SetTimeStamp(JSContext* aCx, JSObject* aObject)
  32 {
  33   JS::Rooted<JSObject*> obj(aCx, aObject);
  34   MOZ_ASSERT(JS_ObjectIsDate(aCx, obj));
  35
  36   obj = js::CheckedUnwrap(obj);
  37   // This really sucks: even if JS_ObjectIsDate, CheckedUnwrap can _still_ fail.
  38   if (!obj) {
  39     return false;
  40   }
  41
  42   mMsecSinceEpoch = js_DateGetMsecSinceEpoch(obj);
  43   return true;
  44 }
  45
  46 bool
  47 Date::ToDateObject(JSContext* aCx, JS::MutableHandle<JS::Value> aRval) const
  48 {
  49   JSObject* obj = JS_NewDateObjectMsec(aCx, mMsecSinceEpoch);
  50   if (!obj) {
  51     return false;
  52   }
  53
  54   aRval.setObject(*obj);
  55   return true;
  56 }
  57
  58 } // namespace dom
  59 } // namespace mozilla