runtime/ErrorConstructor.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 "ErrorConstructor.h"
  23
  24 #include "ErrorPrototype.h"
  25 #include "JSGlobalObject.h"
  26 #include "JSString.h"
  27
  28 namespace JSC {
  29
  30 ASSERT_CLASS_FITS_IN_CELL(ErrorConstructor);
  31 ASSERT_HAS_TRIVIAL_DESTRUCTOR(ErrorConstructor);
  32
  33 const ClassInfo ErrorConstructor::s_info = { "Function", &Base::s_info, 0, 0, CREATE_METHOD_TABLE(ErrorConstructor) };
  34
  35 ErrorConstructor::ErrorConstructor(JSGlobalObject* globalObject, Structure* structure)
  36     : InternalFunction(globalObject, structure)
  37 {
  38 }
  39
  40 void ErrorConstructor::finishCreation(ExecState* exec, ErrorPrototype* errorPrototype)
  41 {
  42     Base::finishCreation(exec->globalData(), Identifier(exec, errorPrototype->classInfo()->className));
  43     // ECMA 15.11.3.1 Error.prototype
  44     putDirectWithoutTransition(exec->globalData(), exec->propertyNames().prototype, errorPrototype, DontEnum | DontDelete | ReadOnly);
  45     putDirectWithoutTransition(exec->globalData(), exec->propertyNames().length, jsNumber(1), DontDelete | ReadOnly | DontEnum);
  46 }
  47
  48 // ECMA 15.9.3
  49
  50 static EncodedJSValue JSC_HOST_CALL constructWithErrorConstructor(ExecState* exec)
  51 {
  52     JSValue message = exec->argumentCount() ? exec->argument(0) : jsUndefined();
  53     Structure* errorStructure = asInternalFunction(exec->callee())->globalObject()->errorStructure();
  54     return JSValue::encode(ErrorInstance::create(exec, errorStructure, message));
  55 }
  56
  57 ConstructType ErrorConstructor::getConstructData(JSCell*, ConstructData& constructData)
  58 {
  59     constructData.native.function = constructWithErrorConstructor;
  60     return ConstructTypeHost;
  61 }
  62
  63 static EncodedJSValue JSC_HOST_CALL callErrorConstructor(ExecState* exec)
  64 {
  65     JSValue message = exec->argumentCount() ? exec->argument(0) : jsUndefined();
  66     Structure* errorStructure = asInternalFunction(exec->callee())->globalObject()->errorStructure();
  67     return JSValue::encode(ErrorInstance::create(exec, errorStructure, message));
  68 }
  69
  70 CallType ErrorConstructor::getCallData(JSCell*, CallData& callData)
  71 {
  72     callData.native.function = callErrorConstructor;
  73     return CallTypeHost;
  74 }
  75
  76 } // namespace JSC