forked from mirrors/gecko-dev
34 lines
930 B
C++
34 lines
930 B
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "StreamUtils.h"
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#include <cmath>
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#include "mozilla/dom/QueuingStrategyBinding.h"
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namespace mozilla::dom {
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// Streams Spec: 7.4
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// https://streams.spec.whatwg.org/#validate-and-normalize-high-water-mark
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double ExtractHighWaterMark(const QueuingStrategy& aStrategy,
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double aDefaultHWM, mozilla::ErrorResult& aRv) {
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// Step 1.
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if (!aStrategy.mHighWaterMark.WasPassed()) {
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return aDefaultHWM;
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}
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// Step 2.
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double highWaterMark = aStrategy.mHighWaterMark.Value();
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// Step 3.
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if (std::isnan(highWaterMark) || highWaterMark < 0) {
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aRv.ThrowRangeError("Invalid highWaterMark");
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return 0.0;
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}
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// Step 4.
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return highWaterMark;
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}
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} // namespace mozilla::dom
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