App({
  buf2hex: function (buffer) {
    return Array.prototype.map.call(new Uint8Array(buffer), x => ('00' + x.toString(16)).slice(-2)).join('')
  },
  buf2string: function (buffer) {
    var arr = Array.prototype.map.call(new Uint8Array(buffer), x => x)
    var str = ''
    for (var i = 0; i < arr.length; i++) {
      str += String.fromCharCode(arr[i])
    }
    return str
  },
  ab2hex: function (buffer) {
    var hexArr = Array.prototype.map.call(
      new Uint8Array(buffer),
      function (bit) {
        return ('00' + bit.toString(16)).slice(-2)
      }
    )
    return hexArr.join('');
  },
  strToHexCharCode: function (str) {
    if (str === "")
      return "";
    var hexCharCode = [];
    hexCharCode.push("0x");
    for (var i = 0; i < str.length; i++) {
      hexCharCode.push((str.charCodeAt(i)).toString(16));
    }
    return hexCharCode.join("");
  },
  stringToBytes: function (str) {
    var array = new Uint8Array(str.length);
    for (var i = 0, l = str.length; i < l; i++) {
      array[i] = str.charCodeAt(i);
    }
    return array.buffer;
  },
  stringToHexBuffer: function (str) {
    var typedArray = new Uint8Array(str.match(/[\da-f]{2}/gi).map(function (h) {
    return parseInt(h, 16)
    }))
    return typedArray.buffer
    },
  onLaunch: function () {
    this.globalData.SystemInfo = wx.getSystemInfoSync()
  },
  globalData: {
    SystemInfo: {}
  }
})