runtime/InternalFunction.cpp

   1 /*
   2  *  Copyright (C) 1999-2002 Harri Porten (porten@kde.org)
   3  *  Copyright (C) 2001 Peter Kelly (pmk@post.com)
   4  *  Copyright (C) 2004, 2007, 2008 Apple Inc. All rights reserved.
   5  *
   6  *  This library is free software; you can redistribute it and/or
   7  *  modify it under the terms of the GNU Library General Public
   8  *  License as published by the Free Software Foundation; either
   9  *  version 2 of the License, or (at your option) any later version.
  10  *
  11  *  This library is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  *  Library General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU Library General Public License
  17  *  along with this library; see the file COPYING.LIB.  If not, write to
  18  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19  *  Boston, MA 02110-1301, USA.
  20  *
  21  */
  22
  23 #include "config.h"
  24 #include "InternalFunction.h"
  25
  26 #include "FunctionPrototype.h"
  27 #include "JSGlobalObject.h"
  28 #include "JSString.h"
  29
  30 namespace JSC {
  31
  32 // Ensure the compiler generates a vtable for InternalFunction!
  33 void InternalFunction::vtableAnchor() {}
  34
  35 ASSERT_CLASS_FITS_IN_CELL(InternalFunction);
  36
  37 const ClassInfo InternalFunction::s_info = { "Function", &JSObjectWithGlobalObject::s_info, 0, 0 };
  38
  39 InternalFunction::InternalFunction(VPtrStealingHackType)
  40     : JSObjectWithGlobalObject(VPtrStealingHack)
  41 {
  42 }
  43
  44 InternalFunction::InternalFunction(JSGlobalData* globalData, JSGlobalObject* globalObject, Structure* structure, const Identifier& name)
  45     : JSObjectWithGlobalObject(globalObject, structure)
  46 {
  47     ASSERT(inherits(&s_info));
  48     putDirect(*globalData, globalData->propertyNames->name, jsString(globalData, name.isNull() ? "" : name.ustring()), DontDelete | ReadOnly | DontEnum);
  49 }
  50
  51 const UString& InternalFunction::name(ExecState* exec)
  52 {
  53     return asString(getDirect(exec->globalData(), exec->globalData().propertyNames->name))->tryGetValue();
  54 }
  55
  56 const UString InternalFunction::displayName(ExecState* exec)
  57 {
  58     JSValue displayName = getDirect(exec->globalData(), exec->globalData().propertyNames->displayName);
  59
  60     if (displayName && isJSString(&exec->globalData(), displayName))
  61         return asString(displayName)->tryGetValue();
  62
  63     return UString();
  64 }
  65
  66 const UString InternalFunction::calculatedDisplayName(ExecState* exec)
  67 {
  68     const UString explicitName = displayName(exec);
  69
  70     if (!explicitName.isEmpty())
  71         return explicitName;
  72
  73     return name(exec);
  74 }
  75
  76 } // namespace JSC