devicestack/util/string.js

This module helps you to represent a device and its protocol.

if (!String.prototype.toArray) {

  /**
   * Converts a hex string to a "byte" array.
   * @return {Array} The result array.
   * @example: '0100'.toArray(); // returns [0x01, 0x00]
   *           '01-FA'.toArray(); // returns [0x01, 0xFA]
   */
  String.prototype.toArray = function() {
    var str = this + '';
    var gapLength = 0;

    if ((str.length >= 3) && (str.charAt(2) == '-')) {
      gapLength = 1;
    } else {
      if (str.length % 2 !== 0) {
        str = '0' + str;
      }
    }

    var result = [];
    for (var i = 0; i < str.length; i += (2 + gapLength)) {
      var val = (str[i] + str[i+1]);
      result.push(parseInt(val, 16));
    }
    return result;
  };
}