text: // Hex JavaScript decoder
  // Copyright (c) 2008-2019 Lapo Luchini <lapo@lapo.it>
  
  // Permission to use, copy, modify, and/or distribute this software for any
  // purpose with or without fee is hereby granted, provided that the above
  // copyright notice and this permission notice appear in all copies.
  // 
  // THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  // WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  // MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  // ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  // WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  // ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  // OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  
  (function (undefined) {
  "use strict";
  
  var Hex = {},
      decoder, // populated on first usage
      haveU8 = ('Uint8Array' in (typeof window == 'object' ? window : global));
  
  Hex.decode = function(a) {
      var i;
      if (decoder === undefined) {
          var hex = "0123456789ABCDEF",
              ignore = " \f\n\r\t\u00A0\u2028\u2029";
          decoder = [];
          for (i = 0; i < 16; ++i)
              decoder[hex.charAt(i)] = i;
          hex = hex.toLowerCase();
          for (i = 10; i < 16; ++i)
              decoder[hex.charAt(i)] = i;
          for (i = 0; i < ignore.length; ++i)
              decoder[ignore.charAt(i)] = -1;
      }
      var out = haveU8 ? new Uint8Array(a.length >> 1) : [],
          bits = 0,
          char_count = 0,
          len = 0;
      for (i = 0; i < a.length; ++i) {
          var c = a.charAt(i);
          if (c == '=')
              break;
          c = decoder[c];
          if (c == -1)
              continue;
          if (c === undefined)
              throw 'Illegal character at offset ' + i;
          bits |= c;
          if (++char_count >= 2) {
              out[len++] = bits;
              bits = 0;
              char_count = 0;
          } else {
              bits <<= 4;
          }
      }
      if (char_count)
          throw "Hex encoding incomplete: 4 bits missing";
      if (haveU8 && out.length > len) // in case it was originally longer because of ignored characters
          out = out.subarray(0, len);
      return out;
  };
  
  // export globals
  if (typeof module !== 'undefined') { module.exports = Hex; } else { window.Hex = Hex; }
  })();
  