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* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
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* Copyright (C) 2003, 2008 Apple Inc. All rights reserved.
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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#include "ErrorPrototype.h"
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#include "JSFunction.h"
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#include "JSStringBuilder.h"
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#include "ObjectPrototype.h"
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#include "StringRecursionChecker.h"
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ASSERT_HAS_TRIVIAL_DESTRUCTOR(ErrorPrototype);
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static EncodedJSValue JSC_HOST_CALL errorProtoFuncToString(ExecState*);
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#include "ErrorPrototype.lut.h"
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const ClassInfo ErrorPrototype::s_info = { "Error", &ErrorInstance::s_info, 0, ExecState::errorPrototypeTable, CREATE_METHOD_TABLE(ErrorPrototype) };
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/* Source for ErrorPrototype.lut.h
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@begin errorPrototypeTable
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toString errorProtoFuncToString DontEnum|Function 0
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ErrorPrototype::ErrorPrototype(ExecState* exec, Structure* structure)
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: ErrorInstance(exec->globalData(), structure)
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void ErrorPrototype::finishCreation(ExecState* exec, JSGlobalObject*)
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Base::finishCreation(exec->globalData(), "");
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ASSERT(inherits(&s_info));
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putDirect(exec->globalData(), exec->propertyNames().name, jsNontrivialString(exec, String(ASCIILiteral("Error"))), DontEnum);
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bool ErrorPrototype::getOwnPropertySlot(JSCell* cell, ExecState* exec, PropertyName propertyName, PropertySlot &slot)
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return getStaticFunctionSlot<ErrorInstance>(exec, ExecState::errorPrototypeTable(exec), jsCast<ErrorPrototype*>(cell), propertyName, slot);
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bool ErrorPrototype::getOwnPropertyDescriptor(JSObject* object, ExecState* exec, PropertyName propertyName, PropertyDescriptor& descriptor)
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return getStaticFunctionDescriptor<ErrorInstance>(exec, ExecState::errorPrototypeTable(exec), jsCast<ErrorPrototype*>(object), propertyName, descriptor);
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// ------------------------------ Functions ---------------------------
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// ECMA-262 5.1, 15.11.4.4
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EncodedJSValue JSC_HOST_CALL errorProtoFuncToString(ExecState* exec)
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// 1. Let O be the this value.
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JSValue thisValue = exec->hostThisValue();
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// 2. If Type(O) is not Object, throw a TypeError exception.
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if (!thisValue.isObject())
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return throwVMTypeError(exec);
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JSObject* thisObj = asObject(thisValue);
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// Guard against recursion!
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StringRecursionChecker checker(exec, thisObj);
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if (JSValue earlyReturnValue = checker.earlyReturnValue())
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return JSValue::encode(earlyReturnValue);
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// 3. Let name be the result of calling the [[Get]] internal method of O with argument "name".
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JSValue name = thisObj->get(exec, exec->propertyNames().name);
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if (exec->hadException())
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return JSValue::encode(jsUndefined());
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// 4. If name is undefined, then let name be "Error"; else let name be ToString(name).
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if (name.isUndefined())
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nameString = ASCIILiteral("Error");
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nameString = name.toString(exec)->value(exec);
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if (exec->hadException())
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return JSValue::encode(jsUndefined());
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// 5. Let msg be the result of calling the [[Get]] internal method of O with argument "message".
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JSValue message = thisObj->get(exec, exec->propertyNames().message);
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if (exec->hadException())
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return JSValue::encode(jsUndefined());
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// 6. If msg is undefined, then let msg be the empty String; else let msg be ToString(msg).
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// 7. If msg is undefined, then let msg be the empty String; else let msg be ToString(msg).
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String messageString;
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if (message.isUndefined())
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messageString = String();
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messageString = message.toString(exec)->value(exec);
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if (exec->hadException())
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return JSValue::encode(jsUndefined());
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// 8. If name is the empty String, return msg.
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if (!nameString.length())
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return JSValue::encode(message.isString() ? message : jsString(exec, messageString));
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// 9. If msg is the empty String, return name.
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if (!messageString.length())
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return JSValue::encode(name.isString() ? name : jsNontrivialString(exec, nameString));
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// 10. Return the result of concatenating name, ":", a single space character, and msg.
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return JSValue::encode(jsMakeNontrivialString(exec, nameString, ": ", messageString));