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 "JSFunction.h"
25 #include "JSGlobalObject.h"
26 #include "PrototypeFunction.h"
27 #include "StringPrototype.h"
28
29 namespace JSC {
30
stringFromCharCodeSlowCase(ExecState * exec,const ArgList & args)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
stringFromCharCode(ExecState * exec,JSObject *,JSValue,const ArgList & args)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
StringConstructor(ExecState * exec,NonNullPassRefPtr<Structure> structure,Structure * prototypeFunctionStructure,StringPrototype * stringPrototype)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
constructWithStringConstructor(ExecState * exec,JSObject *,const ArgList & args)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
getConstructData(ConstructData & constructData)71 ConstructType StringConstructor::getConstructData(ConstructData& constructData)
72 {
73 constructData.native.function = constructWithStringConstructor;
74 return ConstructTypeHost;
75 }
76
77 // ECMA 15.5.1
callStringConstructor(ExecState * exec,JSObject *,JSValue,const ArgList & args)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
getCallData(CallData & callData)85 CallType StringConstructor::getCallData(CallData& callData)
86 {
87 callData.native.function = callStringConstructor;
88 return CallTypeHost;
89 }
90
91 } // namespace JSC
92