runtime/NativeErrorConstructor.cpp

   1 /*
   2  *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
   3  *  Copyright (C) 2003, 2008 Apple Inc. All rights reserved.
   4  *
   5  *  This library is free software; you can redistribute it and/or
   6  *  modify it under the terms of the GNU Lesser General Public
   7  *  License as published by the Free Software Foundation; either
   8  *  version 2 of the License, or (at your option) any later version.
   9  *
  10  *  This library is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  *  Lesser General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU Lesser General Public
  16  *  License along with this library; if not, write to the Free Software
  17  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  18  *
  19  */
  20
  21 #include "config.h"
  22 #include "NativeErrorConstructor.h"
  23
  24 #include "ErrorInstance.h"
  25 #include "JSFunction.h"
  26 #include "JSString.h"
  27 #include "NativeErrorPrototype.h"
  28
  29 namespace JSC {
  30
  31 ASSERT_CLASS_FITS_IN_CELL(NativeErrorConstructor);
  32
  33 const ClassInfo NativeErrorConstructor::s_info = { "Function", &InternalFunction::s_info, 0, 0 };
  34
  35 NativeErrorConstructor::NativeErrorConstructor(ExecState* exec, JSGlobalObject* globalObject, Structure* structure, Structure* prototypeStructure, const UString& nameAndMessage)
  36     : InternalFunction(&exec->globalData(), globalObject, structure, Identifier(exec, nameAndMessage))
  37 {
  38     ASSERT(inherits(&s_info));
  39
  40     NativeErrorPrototype* prototype = new (exec) NativeErrorPrototype(exec, globalObject, prototypeStructure, nameAndMessage, this);
  41
  42     putDirect(exec->globalData(), exec->propertyNames().length, jsNumber(1), DontDelete | ReadOnly | DontEnum); // ECMA 15.11.7.5
  43     putDirect(exec->globalData(), exec->propertyNames().prototype, prototype, DontDelete | ReadOnly | DontEnum);
  44     m_errorStructure.set(exec->globalData(), this, ErrorInstance::createStructure(exec->globalData(), prototype));
  45     ASSERT(m_errorStructure);
  46     ASSERT(m_errorStructure->typeInfo().type() == ObjectType);
  47 }
  48
  49 void NativeErrorConstructor::visitChildren(SlotVisitor& visitor)
  50 {
  51     ASSERT_GC_OBJECT_INHERITS(this, &s_info);
  52     COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag);
  53     ASSERT(structure()->typeInfo().overridesVisitChildren());
  54     InternalFunction::visitChildren(visitor);
  55     if (m_errorStructure)
  56         visitor.append(&m_errorStructure);
  57 }
  58
  59 static EncodedJSValue JSC_HOST_CALL constructWithNativeErrorConstructor(ExecState* exec)
  60 {
  61     JSValue message = exec->argumentCount() ? exec->argument(0) : jsUndefined();
  62     Structure* errorStructure = static_cast<NativeErrorConstructor*>(exec->callee())->errorStructure();
  63     ASSERT(errorStructure);
  64     return JSValue::encode(ErrorInstance::create(exec, errorStructure, message));
  65 }
  66
  67 ConstructType NativeErrorConstructor::getConstructData(ConstructData& constructData)
  68 {
  69     constructData.native.function = constructWithNativeErrorConstructor;
  70     return ConstructTypeHost;
  71 }
  72
  73 static EncodedJSValue JSC_HOST_CALL callNativeErrorConstructor(ExecState* exec)
  74 {
  75     JSValue message = exec->argumentCount() ? exec->argument(0) : jsUndefined();
  76     Structure* errorStructure = static_cast<NativeErrorConstructor*>(exec->callee())->errorStructure();
  77     return JSValue::encode(ErrorInstance::create(exec, errorStructure, message));
  78 }
  79
  80 CallType NativeErrorConstructor::getCallData(CallData& callData)
  81 {
  82     callData.native.function = callNativeErrorConstructor;
  83     return CallTypeHost;
  84 }
  85
  86 } // namespace JSC