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44 lines
867 B
JavaScript
44 lines
867 B
JavaScript
5 years ago
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"use strict";
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const {B, KiB, MiB, GiB, TiB, PiB, EiB} = require("../../units/bytes/iec");
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let unitMap = {
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b: B,
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k: KiB,
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m: MiB,
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g: GiB,
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t: TiB,
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p: PiB,
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e: EiB
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};
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function mapUnit(unitString) {
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if (unitString == null) {
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return B;
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} else {
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let normalizedUnitString = unitString.toLowerCase();
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if (unitMap[normalizedUnitString] != null) {
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return unitMap[normalizedUnitString];
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} else {
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throw new Error(`Unknown unit: ${unit}`);
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}
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}
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}
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module.exports = function parseIECBytes(sizeString) {
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if (sizeString == null) {
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return sizeString;
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} else {
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let match = /^([0-9]+(?:\.[0-9]+)?)([bkmgtpe])?$/i.exec(sizeString.trim());
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if (match == null) {
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throw new Error(`Could not parse size string: ${sizeString}`);
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}
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let [_, number, unit] = match;
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let unitCreator = mapUnit(unit);
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return unitCreator(parseFloat(number));
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}
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};
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