1 /* 2 * Copyright (C) 1999-2001 Harri Porten (porten (at) 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 "JSFunction.h" 25 #include "JSGlobalObject.h" 26 #include "PrototypeFunction.h" 27 #include "StringPrototype.h" 28 29 namespace JSC { 30 31 static NEVER_INLINE JSValue stringFromCharCodeSlowCase(ExecState* exec, const ArgList& args) 32 { 33 unsigned length = args.size(); 34 UChar* buf; 35 PassRefPtr<UStringImpl> impl = UStringImpl::createUninitialized(length, buf); 36 for (unsigned i = 0; i < length; ++i) 37 buf[i] = static_cast<UChar>(args.at(i).toUInt32(exec)); 38 return jsString(exec, impl); 39 } 40 41 static JSValue JSC_HOST_CALL stringFromCharCode(ExecState* exec, JSObject*, JSValue, const ArgList& args) 42 { 43 if (LIKELY(args.size() == 1)) 44 return jsSingleCharacterString(exec, args.at(0).toUInt32(exec)); 45 return stringFromCharCodeSlowCase(exec, args); 46 } 47 48 ASSERT_CLASS_FITS_IN_CELL(StringConstructor); 49 50 StringConstructor::StringConstructor(ExecState* exec, NonNullPassRefPtr<Structure> structure, Structure* prototypeFunctionStructure, StringPrototype* stringPrototype) 51 : InternalFunction(&exec->globalData(), structure, Identifier(exec, stringPrototype->classInfo()->className)) 52 { 53 // ECMA 15.5.3.1 String.prototype 54 putDirectWithoutTransition(exec->propertyNames().prototype, stringPrototype, ReadOnly | DontEnum | DontDelete); 55 56 // ECMA 15.5.3.2 fromCharCode() 57 putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, prototypeFunctionStructure, 1, exec->propertyNames().fromCharCode, stringFromCharCode), DontEnum); 58 59 // no. of arguments for constructor 60 putDirectWithoutTransition(exec->propertyNames().length, jsNumber(exec, 1), ReadOnly | DontEnum | DontDelete); 61 } 62 63 // ECMA 15.5.2 64 static JSObject* constructWithStringConstructor(ExecState* exec, JSObject*, const ArgList& args) 65 { 66 if (args.isEmpty()) 67 return new (exec) StringObject(exec, exec->lexicalGlobalObject()->stringObjectStructure()); 68 return new (exec) StringObject(exec, exec->lexicalGlobalObject()->stringObjectStructure(), args.at(0).toString(exec)); 69 } 70 71 ConstructType StringConstructor::getConstructData(ConstructData& constructData) 72 { 73 constructData.native.function = constructWithStringConstructor; 74 return ConstructTypeHost; 75 } 76 77 // ECMA 15.5.1 78 static JSValue JSC_HOST_CALL callStringConstructor(ExecState* exec, JSObject*, JSValue, const ArgList& args) 79 { 80 if (args.isEmpty()) 81 return jsEmptyString(exec); 82 return jsString(exec, args.at(0).toString(exec)); 83 } 84 85 CallType StringConstructor::getCallData(CallData& callData) 86 { 87 callData.native.function = callStringConstructor; 88 return CallTypeHost; 89 } 90 91 } // namespace JSC 92
