1/* 2 * Copyright (C) 1999-2001 Harri Porten (porten@kde.org) 3 * Copyright (C) 2004, 2005, 2006, 2007, 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 "StringConstructor.h" 23 24#include "Executable.h" 25#include "JITCode.h" 26#include "JSFunction.h" 27#include "JSGlobalObject.h" 28#include "StringPrototype.h" 29 30namespace JSC { 31 32static NEVER_INLINE JSValue stringFromCharCodeSlowCase(ExecState* exec) 33{ 34 unsigned length = exec->argumentCount(); 35 UChar* buf; 36 PassRefPtr<StringImpl> impl = StringImpl::createUninitialized(length, buf); 37 for (unsigned i = 0; i < length; ++i) 38 buf[i] = static_cast<UChar>(exec->argument(i).toUInt32(exec)); 39 return jsString(exec, impl); 40} 41 42static EncodedJSValue JSC_HOST_CALL stringFromCharCode(ExecState* exec) 43{ 44 if (LIKELY(exec->argumentCount() == 1)) 45 return JSValue::encode(jsSingleCharacterString(exec, exec->argument(0).toUInt32(exec))); 46 return JSValue::encode(stringFromCharCodeSlowCase(exec)); 47} 48 49ASSERT_CLASS_FITS_IN_CELL(StringConstructor); 50 51StringConstructor::StringConstructor(ExecState* exec, JSGlobalObject* globalObject, Structure* structure, Structure* functionStructure, StringPrototype* stringPrototype) 52 : InternalFunction(&exec->globalData(), globalObject, structure, Identifier(exec, stringPrototype->classInfo()->className)) 53{ 54 // ECMA 15.5.3.1 String.prototype 55 putDirectWithoutTransition(exec->globalData(), exec->propertyNames().prototype, stringPrototype, ReadOnly | DontEnum | DontDelete); 56 57 // ECMA 15.5.3.2 fromCharCode() 58#if ENABLE(JIT) && ENABLE(JIT_OPTIMIZE_NATIVE_CALL) 59 putDirectFunctionWithoutTransition(exec, new (exec) JSFunction(exec, globalObject, functionStructure, 1, exec->propertyNames().fromCharCode, exec->globalData().getHostFunction(stringFromCharCode, fromCharCodeThunkGenerator)), DontEnum); 60#else 61 putDirectFunctionWithoutTransition(exec, new (exec) JSFunction(exec, globalObject, functionStructure, 1, exec->propertyNames().fromCharCode, stringFromCharCode), DontEnum); 62#endif 63 // no. of arguments for constructor 64 putDirectWithoutTransition(exec->globalData(), exec->propertyNames().length, jsNumber(1), ReadOnly | DontEnum | DontDelete); 65} 66 67// ECMA 15.5.2 68static EncodedJSValue JSC_HOST_CALL constructWithStringConstructor(ExecState* exec) 69{ 70 JSGlobalObject* globalObject = asInternalFunction(exec->callee())->globalObject(); 71 if (!exec->argumentCount()) 72 return JSValue::encode(new (exec) StringObject(exec, globalObject->stringObjectStructure())); 73 return JSValue::encode(new (exec) StringObject(exec, globalObject->stringObjectStructure(), exec->argument(0).toString(exec))); 74} 75 76ConstructType StringConstructor::getConstructData(ConstructData& constructData) 77{ 78 constructData.native.function = constructWithStringConstructor; 79 return ConstructTypeHost; 80} 81 82// ECMA 15.5.1 83static EncodedJSValue JSC_HOST_CALL callStringConstructor(ExecState* exec) 84{ 85 if (!exec->argumentCount()) 86 return JSValue::encode(jsEmptyString(exec)); 87 return JSValue::encode(jsString(exec, exec->argument(0).toString(exec))); 88} 89 90CallType StringConstructor::getCallData(CallData& callData) 91{ 92 callData.native.function = callStringConstructor; 93 return CallTypeHost; 94} 95 96} // namespace JSC 97