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
  32 ErrorConstructor::ErrorConstructor(ExecState* exec, NonNullPassRefPtr<Structure> structure, ErrorPrototype* errorPrototype)
  33     : InternalFunction(&exec->globalData(), structure, Identifier(exec, errorPrototype->classInfo()->className))
  34 {
  35     // ECMA 15.11.3.1 Error.prototype
  36     putDirectWithoutTransition(exec->propertyNames().prototype, errorPrototype, DontEnum | DontDelete | ReadOnly);
  37     putDirectWithoutTransition(exec->propertyNames().length, jsNumber(exec, 1), DontDelete | ReadOnly | DontEnum);
  38 }
  39
  40 // ECMA 15.9.3
  41 ErrorInstance* constructError(ExecState* exec, const ArgList& args)
  42 {
  43     ErrorInstance* obj = new (exec) ErrorInstance(exec->lexicalGlobalObject()->errorStructure());
  44     if (!args.at(0).isUndefined())
  45         obj->putDirect(exec->propertyNames().message, jsString(exec, args.at(0).toString(exec)));
  46     return obj;
  47 }
  48
  49 static JSObject* constructWithErrorConstructor(ExecState* exec, JSObject*, const ArgList& args)
  50 {
  51     return constructError(exec, args);
  52 }
  53
  54 ConstructType ErrorConstructor::getConstructData(ConstructData& constructData)
  55 {
  56     constructData.native.function = constructWithErrorConstructor;
  57     return ConstructTypeHost;
  58 }
  59
  60 // ECMA 15.9.2
  61 static JSValue JSC_HOST_CALL callErrorConstructor(ExecState* exec, JSObject*, JSValue, const ArgList& args)
  62 {
  63     // "Error()" gives the sames result as "new Error()"
  64     return constructError(exec, args);
  65 }
  66
  67 CallType ErrorConstructor::getCallData(CallData& callData)
  68 {
  69     callData.native.function = callErrorConstructor;
  70     return CallTypeHost;
  71 }
  72
  73 } // namespace JSC