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/* 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/. */
#include "StreamUtils.h"
#include <cmath>
#include "mozilla/dom/QueuingStrategyBinding.h"
namespace mozilla::dom {
// Streams Spec: 7.4
// https://streams.spec.whatwg.org/#validate-and-normalize-high-water-mark
double ExtractHighWaterMark(const QueuingStrategy& aStrategy,
double aDefaultHWM, mozilla::ErrorResult& aRv) {
// Step 1.
if (!aStrategy.mHighWaterMark.WasPassed()) {
return aDefaultHWM;
}
// Step 2.
double highWaterMark = aStrategy.mHighWaterMark.Value();
// Step 3.
if (std::isnan(highWaterMark) || highWaterMark < 0) {
aRv.ThrowRangeError("Invalid highWaterMark");
return 0.0;
}
// Step 4.
return highWaterMark;
}
} // namespace mozilla::dom
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