byte-parser/lib/index.js

Parse byte string to byte number, e.g. 1.2 Kb -> 1228.8, Kb, Mb, Gb, Tb, Pb, Eb, Zb, Yb supported.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var MAP = {
    k: 1,
    m: 2,
    g: 3,
    t: 4,
    p: 5,
    e: 6,
    z: 7,
    y: 8,
};
/**
 * parse byte string into a number
 * @param byteString
 */
function default_1(byteString, ratio) {
    if (ratio === void 0) { ratio = 1024; }
    var match = byteString.match(/^(\d*\.*\d*)\s*([kKmMgGtTpPeEzZyY]{0,1}[bB]{0,1})$/);
    if (!match) {
        throw "invalid byte string '" + byteString + "'!";
    }
    var size = match[1];
    var unit = match[2].toLowerCase().replace(/(b$)/, ''); // 删除最后的 b
    return size * Math.pow(ratio, MAP[unit] || 0);
}
exports.default = default_1;