hdd-space/dist/format.js

This module provides getting information about free space and size of hdds

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var utils_1 = require("./utils");
exports.multiplierPowers = {
    bit: -3,
    byte: 0,
    kb: 10,
    mb: 20,
    gb: 30,
    tb: 40,
    pb: 50,
    eb: 60,
    zb: 70,
    yb: 80
};
var maxScale = 80;
var invertedMultipliers = utils_1.invertHashTable(exports.multiplierPowers);
function capitalizeMultiplier(multiplier) {
    switch (multiplier) {
        case 'bit': return 'Bits';
        case 'byte': return 'Bytes';
        default: return multiplier.toUpperCase();
    }
}
function scaleNumber(n, power) {
    return n / Math.pow(2, power);
}
function formatSize(format, size) {
    if (typeof format === 'function') {
        return format(size);
    }
    var staticFormat = format.toLowerCase();
    if (staticFormat in exports.multiplierPowers) {
        var power = exports.multiplierPowers[staticFormat];
        return scaleNumber(size, power) + ' ' + capitalizeMultiplier(staticFormat);
    }
    if (staticFormat === 'auto') {
        var scale = Math.floor(Math.log(size) / Math.log(1024)) * 10;
        if (!(scale in invertedMultipliers)) {
            scale = scale > maxScale ? maxScale : 0;
        }
        var unit = invertedMultipliers[scale];
        return scaleNumber(size, scale).toFixed(2) + ' ' + capitalizeMultiplier(unit);
    }
    console.error("Bad format [" + staticFormat + "]");
    return formatSize('byte', size);
}
exports.formatSize = formatSize;
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