60 lines
1.4 KiB
JavaScript
60 lines
1.4 KiB
JavaScript
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/*
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* 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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*/
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/*
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* Copyright (c) 2017, Joyent, Inc.
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*/
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var assert = require('assert-plus');
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function throwInvalidSize(size) {
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assert.string(size, 'size');
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throw new Error('size "' + size + '" is not a valid volume size');
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}
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/*
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* Returns the number of MiBs (Mebibytes) represented by the string "size". That
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* string can have different format suffixes, such as "100GB", "100G", etc.
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* If "size" is not a valid size string, an error is thrown.
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*/
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function parseVolumeSize(size) {
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assert.optionalString(size, 'size');
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var MIBS_IN_GB = 1024;
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var MULTIPLIERS_TABLE = {
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g: MIBS_IN_GB,
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GB: MIBS_IN_GB,
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m: 1,
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MB: 1
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};
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var multiplierSymbol, multiplier;
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var baseValue;
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if (size === undefined) {
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return undefined;
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}
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var matches = size.match(/(\d+)(g|m|G|M|gb|mb|GB|MB)/);
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if (!matches) {
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throwInvalidSize(size);
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}
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multiplierSymbol = matches[2];
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multiplier = MULTIPLIERS_TABLE[multiplierSymbol];
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baseValue = Number(matches[1]);
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if (isNaN(baseValue) || multiplier === undefined) {
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throwInvalidSize(size);
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}
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return baseValue * multiplier;
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}
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module.exports = {
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parseVolumeSize: parseVolumeSize
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};
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