json.js

// Javascript JSON implementation
// (Parse Method Only)
// https://github.com/douglascrockford/JSON-js/blob/master/json2.js

var JSON;
if (!JSON) { JSON = {}; }

(function(){
  var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;

  if (typeof JSON.parse !== 'function') {
      JSON.parse = function (text, reviver) {
          var j;

          function walk(holder, key) {
              var k, v, value = holder[key];
              if (value && typeof value === 'object') {
                  for (k in value) {
                      if (Object.prototype.hasOwnProperty.call(value, k)) {
                          v = walk(value, k);
                          if (v !== undefined) {
                              value[k] = v;
                          } else {
                              delete value[k];
                          }
                      }
                  }
              }
              return reviver.call(holder, key, value);
          }
          text = String(text);
          cx.lastIndex = 0;
          if (cx.test(text)) {
              text = text.replace(cx, function (a) {
                  return '\\u' +
                      ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
              });
          }

          if (/^[\],:{}\s]*$/
                  .test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@')
                      .replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
                      .replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {

              j = eval('(' + text + ')');

              return typeof reviver === 'function' ?
                  walk({'': j}, '') : j;
          }

          throw new SyntaxError('JSON.parse');
      };
  }
}());