webkitgtk-2.10.2webkitgtk-2.10.2

1 files changed, 160 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/runtime/StringConstructor.cpp b/Source/JavaScriptCore/runtime/StringConstructor.cpp
new file mode 100644
index 000000000..e8d396970
--- /dev/null
+++ b/Source/JavaScriptCore/runtime/StringConstructor.cpp
@@ -0,0 +1,160 @@
+/*
+ *  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 "Error.h"
+#include "Executable.h"
+#include "JITCode.h"
+#include "JSFunction.h"
+#include "JSGlobalObject.h"
+#include "JSCInlines.h"
+#include "StringPrototype.h"
+
+namespace JSC {
+
+static EncodedJSValue JSC_HOST_CALL stringFromCharCode(ExecState*);
+static EncodedJSValue JSC_HOST_CALL stringFromCodePoint(ExecState*);
+
+}
+
+#include "StringConstructor.lut.h"
+
+namespace JSC {
+
+const ClassInfo StringConstructor::s_info = { "Function", &InternalFunction::s_info, &stringConstructorTable, CREATE_METHOD_TABLE(StringConstructor) };
+
+/* Source for StringConstructor.lut.h
+@begin stringConstructorTable
+  fromCharCode          stringFromCharCode         DontEnum|Function 1
+  fromCodePoint         stringFromCodePoint        DontEnum|Function 1
+  raw                   stringRaw                  DontEnum|Function 1
+@end
+*/
+
+STATIC_ASSERT_IS_TRIVIALLY_DESTRUCTIBLE(StringConstructor);
+
+StringConstructor::StringConstructor(VM& vm, Structure* structure)
+    : InternalFunction(vm, structure)
+{
+}
+
+void StringConstructor::finishCreation(VM& vm, StringPrototype* stringPrototype)
+{
+    Base::finishCreation(vm, stringPrototype->classInfo()->className);
+    putDirectWithoutTransition(vm, vm.propertyNames->prototype, stringPrototype, ReadOnly | DontEnum | DontDelete);
+    putDirectWithoutTransition(vm, vm.propertyNames->length, jsNumber(1), ReadOnly | DontEnum | DontDelete);
+}
+
+bool StringConstructor::getOwnPropertySlot(JSObject* object, ExecState* exec, PropertyName propertyName, PropertySlot &slot)
+{
+    return getStaticFunctionSlot<InternalFunction>(exec, stringConstructorTable, jsCast<StringConstructor*>(object), propertyName, slot);
+}
+
+// ------------------------------ Functions --------------------------------
+
+static NEVER_INLINE JSValue stringFromCharCodeSlowCase(ExecState* exec)
+{
+    unsigned length = exec->argumentCount();
+    UChar* buf;
+    PassRefPtr<StringImpl> impl = StringImpl::createUninitialized(length, buf);
+    for (unsigned i = 0; i < length; ++i)
+        buf[i] = static_cast<UChar>(exec->uncheckedArgument(i).toUInt32(exec));
+    return jsString(exec, impl);
+}
+
+static EncodedJSValue JSC_HOST_CALL stringFromCharCode(ExecState* exec)
+{
+    if (LIKELY(exec->argumentCount() == 1))
+        return JSValue::encode(jsSingleCharacterString(exec, exec->uncheckedArgument(0).toUInt32(exec)));
+    return JSValue::encode(stringFromCharCodeSlowCase(exec));
+}
+
+JSCell* JSC_HOST_CALL stringFromCharCode(ExecState* exec, int32_t arg)
+{
+    return jsSingleCharacterString(exec, arg);
+}
+
+static EncodedJSValue JSC_HOST_CALL stringFromCodePoint(ExecState* exec)
+{
+    unsigned length = exec->argumentCount();
+    StringBuilder builder;
+    builder.reserveCapacity(length);
+
+    for (unsigned i = 0; i < length; ++i) {
+        double codePointAsDouble = exec->uncheckedArgument(i).toNumber(exec);
+        if (exec->hadException())
+            return JSValue::encode(jsUndefined());
+
+        uint32_t codePoint = static_cast<uint32_t>(codePointAsDouble);
+
+        if (codePoint != codePointAsDouble || codePoint > UCHAR_MAX_VALUE)
+            return throwVMError(exec, createRangeError(exec, ASCIILiteral("Arguments contain a value that is out of range of code points")));
+
+        if (U_IS_BMP(codePoint))
+            builder.append(static_cast<UChar>(codePoint));
+        else {
+            builder.append(U16_LEAD(codePoint));
+            builder.append(U16_TRAIL(codePoint));
+        }
+    }
+
+    return JSValue::encode(jsString(exec, builder.toString()));
+}
+
+static EncodedJSValue JSC_HOST_CALL constructWithStringConstructor(ExecState* exec)
+{
+    JSGlobalObject* globalObject = asInternalFunction(exec->callee())->globalObject();
+    VM& vm = exec->vm();
+
+    if (!exec->argumentCount())
+        return JSValue::encode(StringObject::create(vm, globalObject->stringObjectStructure()));
+
+    return JSValue::encode(StringObject::create(vm, globalObject->stringObjectStructure(), exec->uncheckedArgument(0).toString(exec)));
+}
+
+ConstructType StringConstructor::getConstructData(JSCell*, ConstructData& constructData)
+{
+    constructData.native.function = constructWithStringConstructor;
+    return ConstructTypeHost;
+}
+
+JSCell* stringConstructor(ExecState* exec, JSValue argument)
+{
+    if (argument.isSymbol())
+        return jsNontrivialString(exec, asSymbol(argument)->descriptiveString());
+    return argument.toString(exec);
+}
+
+static EncodedJSValue JSC_HOST_CALL callStringConstructor(ExecState* exec)
+{
+    if (!exec->argumentCount())
+        return JSValue::encode(jsEmptyString(exec));
+    return JSValue::encode(stringConstructor(exec, exec->uncheckedArgument(0)));
+}
+
+CallType StringConstructor::getCallData(JSCell*, CallData& callData)
+{
+    callData.native.function = callStringConstructor;
+    return CallTypeHost;
+}
+
+} // namespace JSC