1 files changed, 167 insertions, 0 deletions
diff --git a/src/javascript/jsc/bindings/webcore/InternalWritableStream.cpp b/src/javascript/jsc/bindings/webcore/InternalWritableStream.cpp
new file mode 100644
index 000000000..d3988c908
--- /dev/null
+++ b/src/javascript/jsc/bindings/webcore/InternalWritableStream.cpp
@@ -0,0 +1,167 @@
+/*
+ * Copyright (C) 2020-2021 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY CANON INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL CANON INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "InternalWritableStream.h"
+
+#include "Exception.h"
+#include "WebCoreJSClientData.h"
+
+namespace WebCore {
+
+static ExceptionOr<JSC::JSValue> invokeWritableStreamFunction(JSC::JSGlobalObject& globalObject, const JSC::Identifier& identifier, const JSC::MarkedArgumentBuffer& arguments)
+{
+    JSC::VM& vm = globalObject.vm();
+    JSC::JSLockHolder lock(vm);
+
+    auto scope = DECLARE_CATCH_SCOPE(vm);
+
+    auto function = globalObject.get(&globalObject, identifier);
+    ASSERT(function.isCallable());
+    scope.assertNoExceptionExceptTermination();
+
+    auto callData = JSC::getCallData(function);
+
+    auto result = call(&globalObject, function, callData, JSC::jsUndefined(), arguments);
+    RETURN_IF_EXCEPTION(scope, Exception { ExistingExceptionError });
+
+    return result;
+}
+
+ExceptionOr<Ref<InternalWritableStream>> InternalWritableStream::createFromUnderlyingSink(JSDOMGlobalObject& globalObject, JSC::JSValue underlyingSink, JSC::JSValue strategy)
+{
+    auto* clientData = static_cast<JSVMClientData*>(globalObject.vm().clientData);
+    auto& privateName = clientData->builtinFunctions().writableStreamInternalsBuiltins().createInternalWritableStreamFromUnderlyingSinkPrivateName();
+
+    JSC::MarkedArgumentBuffer arguments;
+    arguments.append(underlyingSink);
+    arguments.append(strategy);
+    ASSERT(!arguments.hasOverflowed());
+
+    auto result = invokeWritableStreamFunction(globalObject, privateName, arguments);
+    if (UNLIKELY(result.hasException()))
+        return result.releaseException();
+
+    ASSERT(result.returnValue().isObject());
+    return adoptRef(*new InternalWritableStream(globalObject, *result.returnValue().toObject(&globalObject)));
+}
+
+Ref<InternalWritableStream> InternalWritableStream::fromObject(JSDOMGlobalObject& globalObject, JSC::JSObject& object)
+{
+    return adoptRef(*new InternalWritableStream(globalObject, object));
+}
+
+bool InternalWritableStream::locked() const
+{
+    auto* globalObject = this->globalObject();
+    if (!globalObject)
+        return false;
+
+    auto scope = DECLARE_CATCH_SCOPE(globalObject->vm());
+
+    auto* clientData = static_cast<JSVMClientData*>(globalObject->vm().clientData);
+    auto& privateName = clientData->builtinFunctions().writableStreamInternalsBuiltins().isWritableStreamLockedPrivateName();
+
+    JSC::MarkedArgumentBuffer arguments;
+    arguments.append(guardedObject());
+    ASSERT(!arguments.hasOverflowed());
+
+    auto result = invokeWritableStreamFunction(*globalObject, privateName, arguments);
+    if (scope.exception())
+        scope.clearException();
+
+    return result.hasException() ? false : result.returnValue().isTrue();
+}
+
+void InternalWritableStream::lock()
+{
+    auto* globalObject = this->globalObject();
+    if (!globalObject)
+        return;
+
+    auto scope = DECLARE_CATCH_SCOPE(globalObject->vm());
+
+    auto* clientData = static_cast<JSVMClientData*>(globalObject->vm().clientData);
+    auto& privateName = clientData->builtinFunctions().writableStreamInternalsBuiltins().acquireWritableStreamDefaultWriterPrivateName();
+
+    JSC::MarkedArgumentBuffer arguments;
+    arguments.append(guardedObject());
+    ASSERT(!arguments.hasOverflowed());
+
+    invokeWritableStreamFunction(*globalObject, privateName, arguments);
+    if (UNLIKELY(scope.exception()))
+        scope.clearException();
+}
+
+JSC::JSValue InternalWritableStream::abort(JSC::JSGlobalObject& globalObject, JSC::JSValue reason)
+{
+    auto* clientData = static_cast<JSVMClientData*>(globalObject.vm().clientData);
+    auto& privateName = clientData->builtinFunctions().writableStreamInternalsBuiltins().writableStreamAbortForBindingsPrivateName();
+
+    JSC::MarkedArgumentBuffer arguments;
+    arguments.append(guardedObject());
+    arguments.append(reason);
+    ASSERT(!arguments.hasOverflowed());
+
+    auto result = invokeWritableStreamFunction(globalObject, privateName, arguments);
+    if (result.hasException())
+        return { };
+
+    return result.returnValue();
+}
+
+JSC::JSValue InternalWritableStream::close(JSC::JSGlobalObject& globalObject)
+{
+    auto* clientData = static_cast<JSVMClientData*>(globalObject.vm().clientData);
+    auto& privateName = clientData->builtinFunctions().writableStreamInternalsBuiltins().writableStreamCloseForBindingsPrivateName();
+
+    JSC::MarkedArgumentBuffer arguments;
+    arguments.append(guardedObject());
+    ASSERT(!arguments.hasOverflowed());
+
+    auto result = invokeWritableStreamFunction(globalObject, privateName, arguments);
+    if (result.hasException())
+        return { };
+
+    return result.returnValue();
+}
+
+JSC::JSValue InternalWritableStream::getWriter(JSC::JSGlobalObject& globalObject)
+{
+    auto* clientData = static_cast<JSVMClientData*>(globalObject.vm().clientData);
+    auto& privateName = clientData->builtinFunctions().writableStreamInternalsBuiltins().acquireWritableStreamDefaultWriterPrivateName();
+
+    JSC::MarkedArgumentBuffer arguments;
+    arguments.append(guardedObject());
+    ASSERT(!arguments.hasOverflowed());
+
+    auto result = invokeWritableStreamFunction(globalObject, privateName, arguments);
+    if (result.hasException())
+        return { };
+
+    return result.returnValue();
+}
+
+}