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node-spearhead/lib/volumes.js

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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/.
*/
/*
* Copyright (c) 2017, Joyent, Inc.
*/
var assert = require('assert-plus');
function throwInvalidSize(size) {
assert.string(size, 'size');
throw new Error('size "' + size + '" is not a valid volume size');
}
/*
* Returns the number of MiBs (Mebibytes) represented by the string "size". That
* string has the following format: <integer><unit>. The integer must be > 0.
* Unit format suffix can only be 'G' for gibibytes.
*
* Example: the strings '100G' represents 100 gibibytes
*
* If "size" is not a valid size string, an error is thrown.
*/
function parseVolumeSize(size) {
assert.string(size, 'size');
var baseValue;
var MIBS_IN_GB = 1024;
var matches = size.match(/^([1-9]\d*)G$/);
if (!matches) {
throwInvalidSize(size);
}
baseValue = Number(matches[1]);
if (isNaN(baseValue)) {
throwInvalidSize(size);
}
return baseValue * MIBS_IN_GB;
}
module.exports = {
parseVolumeSize: parseVolumeSize
};