TechEmpower.FrameworkBenchmarks/frameworks/JavaScript/just/lib/stringify.js

// lifted from here: https://github.com/lucagez/slow-json-stringify

var _prepare = function(e) {
  var r = JSON.stringify(e, function(e, r) {
      return r.isSJS ? r.type + "__sjs" : r
  });
  return {
      preparedString: r,
      preparedSchema: JSON.parse(r)
  }
},
_find = function(path) {
  for (var length = path.length, str = "obj", i = 0; i < length; i++) str = str.replace(/^/, "("), str += " || {})." + path[i];
  return just.vm.runScript("((obj) => " + str + ")")
},
_makeArraySerializer = function(e) {
  return e instanceof Function ? function(r) {
      for (var n = "", t = r.length, a = 0; a < t - 1; a++) n += e(r[a]) + ",";
      return "[" + (n += e(r[t - 1])) + "]"
  } : function(e) {
      return JSON.stringify(e)
  }
},
TYPES = ["number", "string", "boolean", "array", "null"],
attr = function(e, r) {
  if (!TYPES.includes(e)) throw new Error('Expected one of: "number", "string", "boolean", "null". received "' + e + '" instead');
  var n = r || function(e) {
      return e
  };
  return {
      isSJS: !0,
      type: e,
      serializer: "array" === e ? _makeArraySerializer(r) : n
  }
},
defaultRegex = new RegExp('\\n|\\r|\\t|\\"|\\\\', "gm"),
escape = function(e) {
  return void 0 === e && (e = defaultRegex),
      function(r) {
          return r.replace(e, function(e) {
              return "\\" + e
          })
      }
},
_makeQueue = function(e, r) {
  var n = [];
  return function e(t, a) {
      if (void 0 === a && (a = []), !/__sjs/.test(t)) return Object.keys(t).map(function(r) {
          return e(t[r], a.concat([r]))
      });
      var i = Array.from(a),
          u = _find(i),
          s = u(r);
      n.push({
          serializer: s.serializer,
          find: u,
          name: a[a.length - 1]
      })
  }(e), n
},
_makeChunks = function(e, r) {
  return e.replace(/"\w+__sjs"/gm, function(e) {
      return /string/.test(e) ? '"__par__"' : "__par__"
  }).split("__par__").map(function(e, n, t) {
      var a = '("' + (r[n] || {}).name + '":("?))$',
          i = "(,?)" + a,
          u = /^("}|})/.test(t[n + 1] || ""),
          s = new RegExp(u ? i : a),
          f = /^(\"\,|\,|\")/;
      return {
          flag: !1,
          pure: e,
          prevUndef: e.replace(f, ""),
          isUndef: e.replace(s, ""),
          bothUndef: e.replace(f, "").replace(s, "")
      }
  })
},
_select = function(e) {
  return function(r, n) {
      var t = e[n];
      return void 0 !== r ? t.flag ? t.prevUndef + r : t.pure + r : (e[n + 1].flag = !0, t.flag ? t.bothUndef : t.isUndef)
  }
},
sjs = function(e) {
  var r = _prepare(e),
      n = r.preparedString,
      t = _makeQueue(r.preparedSchema, e),
      a = _makeChunks(n, t),
      i = _select(a),
      u = t.length;
  return function(e) {
      for (var r = "", n = 0; n !== u;) {
          var s = t[n],
              f = s.serializer,
              p = (0, s.find)(e);
          r += i(f(p), n), n += 1
      }
      var o = a[a.length - 1];
      return r + (o.flag ? o.prevUndef : o.pure)
  }
};
exports.sjs = sjs, exports.attr = attr, exports.escape = escape;