JavaScriptCore-521.tar.gz

[apple/javascriptcore.git] / runtime / StringConstructor.cpp

diff --git a/runtime/StringConstructor.cpp b/runtime/StringConstructor.cpp
new file mode 100644 (file)
index 0000000..dc1d60f
--- /dev/null
+++ b/runtime/StringConstructor.cpp
@@ -0,0 +1,90 @@
+/*
+ *  Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
+ *  Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#include "config.h"
+#include "StringConstructor.h"
+
+#include "JSGlobalObject.h"
+#include "PrototypeFunction.h"
+#include "StringPrototype.h"
+
+namespace JSC {
+
+static NEVER_INLINE JSValuePtr stringFromCharCodeSlowCase(ExecState* exec, const ArgList& args)
+{
+    UChar* buf = static_cast<UChar*>(fastMalloc(args.size() * sizeof(UChar)));
+    UChar* p = buf;
+    ArgList::const_iterator end = args.end();
+    for (ArgList::const_iterator it = args.begin(); it != end; ++it)
+        *p++ = static_cast<UChar>((*it).jsValue(exec).toUInt32(exec));
+    return jsString(exec, UString(buf, p - buf, false));
+}
+
+static JSValuePtr stringFromCharCode(ExecState* exec, JSObject*, JSValuePtr, const ArgList& args)
+{
+    if (LIKELY(args.size() == 1))
+        return jsSingleCharacterString(exec, args.at(exec, 0).toUInt32(exec));
+    return stringFromCharCodeSlowCase(exec, args);
+}
+
+ASSERT_CLASS_FITS_IN_CELL(StringConstructor);
+
+StringConstructor::StringConstructor(ExecState* exec, PassRefPtr<Structure> structure, Structure* prototypeFunctionStructure, StringPrototype* stringPrototype)
+    : InternalFunction(&exec->globalData(), structure, Identifier(exec, stringPrototype->classInfo()->className))
+{
+    // ECMA 15.5.3.1 String.prototype
+    putDirectWithoutTransition(exec->propertyNames().prototype, stringPrototype, ReadOnly | DontEnum | DontDelete);
+
+    // ECMA 15.5.3.2 fromCharCode()
+    putDirectFunctionWithoutTransition(exec, new (exec) PrototypeFunction(exec, prototypeFunctionStructure, 1, exec->propertyNames().fromCharCode, stringFromCharCode), DontEnum);
+
+    // no. of arguments for constructor
+    putDirectWithoutTransition(exec->propertyNames().length, jsNumber(exec, 1), ReadOnly | DontEnum | DontDelete);
+}
+
+// ECMA 15.5.2
+static JSObject* constructWithStringConstructor(ExecState* exec, JSObject*, const ArgList& args)
+{
+    if (args.isEmpty())
+        return new (exec) StringObject(exec, exec->lexicalGlobalObject()->stringObjectStructure());
+    return new (exec) StringObject(exec, exec->lexicalGlobalObject()->stringObjectStructure(), args.at(exec, 0).toString(exec));
+}
+
+ConstructType StringConstructor::getConstructData(ConstructData& constructData)
+{
+    constructData.native.function = constructWithStringConstructor;
+    return ConstructTypeHost;
+}
+
+// ECMA 15.5.1
+static JSValuePtr callStringConstructor(ExecState* exec, JSObject*, JSValuePtr, const ArgList& args)
+{
+    if (args.isEmpty())
+        return jsEmptyString(exec);
+    return jsString(exec, args.at(exec, 0).toString(exec));
+}
+
+CallType StringConstructor::getCallData(CallData& callData)
+{
+    callData.native.function = callStringConstructor;
+    return CallTypeHost;
+}
+
+} // namespace JSC