34 lines
964 B
TypeScript
34 lines
964 B
TypeScript
/*
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Copyright 2017 Jeremy Scheff
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Copyright 2019 Florian Dold
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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or implied. See the License for the specific language governing
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permissions and limitations under the License.
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*/
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// https://heycam.github.io/webidl/#EnforceRange
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export const enforceRange = (
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num: number,
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type: "MAX_SAFE_INTEGER" | "unsigned long",
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) => {
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const min = 0;
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const max = type === "unsigned long" ? 4294967295 : 9007199254740991;
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if (isNaN(num) || num < min || num > max) {
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throw new TypeError();
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}
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if (num >= 0) {
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return Math.floor(num);
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}
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};
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