Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 77 insertions, 0 deletions

diff --git a/js/src/builtin/streams/QueueWithSizes-inl.h b/js/src/builtin/streams/QueueWithSizes-inl.h
new file mode 100644
index 0000000000..deb1aabbd5
--- /dev/null
+++ b/js/src/builtin/streams/QueueWithSizes-inl.h
@@ -0,0 +1,77 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* Queue-with-sizes operations. */
+
+#ifndef builtin_streams_QueueWithSizes_inl_h
+#define builtin_streams_QueueWithSizes_inl_h
+
+#include "builtin/streams/QueueWithSizes.h"
+
+#include "mozilla/Assertions.h"  // MOZ_ASSERT
+
+#include "js/RootingAPI.h"  // JS::Handle
+#include "js/Value.h"       // JS::Value
+#include "vm/List.h"        // js::ListObject
+
+#include "vm/List-inl.h"  // js::ListObject::*
+
+struct JS_PUBLIC_API JSContext;
+
+namespace js {
+
+namespace detail {
+
+// The *internal* representation of a queue-with-sizes is a List of even length
+// where elements (2 * n, 2 * n + 1) represent the nth (value, size) element in
+// the queue.
+
+inline JS::Value QueueFirstValue(ListObject* unwrappedQueue) {
+  MOZ_ASSERT(!unwrappedQueue->isEmpty(),
+             "can't examine first value in an empty queue-with-sizes");
+  MOZ_ASSERT((unwrappedQueue->length() % 2) == 0,
+             "queue-with-sizes must consist of (value, size) element pairs and "
+             "so must have even length");
+  return unwrappedQueue->get(0);
+}
+
+inline double QueueFirstSize(ListObject* unwrappedQueue) {
+  MOZ_ASSERT(!unwrappedQueue->isEmpty(),
+             "can't examine first value in an empty queue-with-sizes");
+  MOZ_ASSERT((unwrappedQueue->length() % 2) == 0,
+             "queue-with-sizes must consist of (value, size) element pairs and "
+             "so must have even length");
+  return unwrappedQueue->get(1).toDouble();
+}
+
+inline void QueueRemoveFirstValueAndSize(ListObject* unwrappedQueue,
+                                         JSContext* cx) {
+  MOZ_ASSERT(!unwrappedQueue->isEmpty(),
+             "can't remove first value from an empty queue-with-sizes");
+  MOZ_ASSERT((unwrappedQueue->length() % 2) == 0,
+             "queue-with-sizes must consist of (value, size) element pairs and "
+             "so must have even length");
+  unwrappedQueue->popFirstPair(cx);
+}
+
+inline MOZ_MUST_USE bool QueueAppendValueAndSize(
+    JSContext* cx, JS::Handle<ListObject*> unwrappedQueue,
+    JS::Handle<JS::Value> value, double size) {
+  return unwrappedQueue->appendValueAndSize(cx, value, size);
+}
+
+}  // namespace detail
+
+/**
+ * Streams spec, 6.2.3. PeekQueueValue ( container ) nothrow
+ */
+inline JS::Value PeekQueueValue(ListObject* queue) {
+  return detail::QueueFirstValue(queue);
+}
+
+}  // namespace js
+
+#endif  // builtin_streams_QueueWithSizes_inl_h