(function() {
  var expandIPv6, ipaddr, ipv4Part, ipv4Regexes, ipv6Part, ipv6Regexes, matchCIDR, root;

  ipaddr = {};

  root = this;

  if ((typeof module !== "undefined" && module !== null) && module.exports) {
    module.exports = ipaddr;
  } else {
    root['ipaddr'] = ipaddr;
  }

  matchCIDR = function(first, second, partSize, cidrBits) {
    var part, shift;
    if (first.length !== second.length) {
      throw new Error("ipaddr: cannot match CIDR for objects with different lengths");
    }
    part = 0;
    while (cidrBits > 0) {
      shift = partSize - cidrBits;
      if (shift < 0) {
        shift = 0;
      }
      if (first[part] >> shift !== second[part] >> shift) {
        return false;
      }
      cidrBits -= partSize;
      part += 1;
    }
    return true;
  };

  ipaddr.subnetMatch = function(address, rangeList, defaultName) {
    var rangeName, rangeSubnets, subnet, _i, _len;
    if (defaultName == null) {
      defaultName = 'unicast';
    }
    for (rangeName in rangeList) {
      rangeSubnets = rangeList[rangeName];
      if (toString.call(rangeSubnets[0]) !== '[object Array]') {
        rangeSubnets = [rangeSubnets];
      }
      for (_i = 0, _len = rangeSubnets.length; _i < _len; _i++) {
        subnet = rangeSubnets[_i];
        if (address.match.apply(address, subnet)) {
          return rangeName;
        }
      }
    }
    return defaultName;
  };

  ipaddr.IPv4 = (function() {
    function IPv4(octets) {
      var octet, _i, _len;
      if (octets.length !== 4) {
        throw new Error("ipaddr: ipv4 octet count should be 4");
      }
      for (_i = 0, _len = octets.length; _i < _len; _i++) {
        octet = octets[_i];
        if (!((0 <= octet && octet <= 255))) {
          throw new Error("ipaddr: ipv4 octet is a byte");
        }
      }
      this.octets = octets;
    }

    IPv4.prototype.kind = function() {
      return 'ipv4';
    };

    IPv4.prototype.toString = function() {
      return this.octets.join(".");
    };

    IPv4.prototype.toByteArray = function() {
      return this.octets.slice(0);
    };

    IPv4.prototype.match = function(other, cidrRange) {
      if (other.kind() !== 'ipv4') {
        throw new Error("ipaddr: cannot match ipv4 address with non-ipv4 one");
      }
      return matchCIDR(this.octets, other.octets, 8, cidrRange);
    };

    IPv4.prototype.SpecialRanges = {
      broadcast: [[new IPv4([255, 255, 255, 255]), 32]],
      multicast: [[new IPv4([224, 0, 0, 0]), 4]],
      linkLocal: [[new IPv4([169, 254, 0, 0]), 16]],
      loopback: [[new IPv4([127, 0, 0, 0]), 8]],
      "private": [[new IPv4([10, 0, 0, 0]), 8], [new IPv4([172, 16, 0, 0]), 12], [new IPv4([192, 168, 0, 0]), 16]],
      reserved: [[new IPv4([192, 0, 0, 0]), 24], [new IPv4([192, 0, 2, 0]), 24], [new IPv4([192, 88, 99, 0]), 24], [new IPv4([198, 51, 100, 0]), 24], [new IPv4([203, 0, 113, 0]), 24], [new IPv4([240, 0, 0, 0]), 4]]
    };

    IPv4.prototype.range = function() {
      return ipaddr.subnetMatch(this, this.SpecialRanges);
    };

    IPv4.prototype.toIPv4MappedAddress = function() {
      return ipaddr.IPv6.parse("::ffff:" + (this.toString()));
    };

    return IPv4;

  })();

  ipv4Part = "(0?\\d+|0x[a-f0-9]+)";

  ipv4Regexes = {
    fourOctet: new RegExp("^" + ipv4Part + "\\." + ipv4Part + "\\." + ipv4Part + "\\." + ipv4Part + "$", 'i'),
    longValue: new RegExp("^" + ipv4Part + "$", 'i')
  };

  ipaddr.IPv4.parser = function(string) {
    var match, parseIntAuto, part, shift, value;
    parseIntAuto = function(string) {
      if (string[0] === "0" && string[1] !== "x") {
        return parseInt(string, 8);
      } else {
        return parseInt(string);
      }
    };
    if (match = string.match(ipv4Regexes.fourOctet)) {
      return (function() {
        var _i, _len, _ref, _results;
        _ref = match.slice(1, 6);
        _results = [];
        for (_i = 0, _len = _ref.length; _i < _len; _i++) {
          part = _ref[_i];
          _results.push(parseIntAuto(part));
        }
        return _results;
      })();
    } else if (match = string.match(ipv4Regexes.longValue)) {
      value = parseIntAuto(match[1]);
      return ((function() {
        var _i, _results;
        _results = [];
        for (shift = _i = 0; _i <= 24; shift = _i += 8) {
          _results.push((value >> shift) & 0xff);
        }
        return _results;
      })()).reverse();
    } else {
      return null;
    }
  };

  ipaddr.IPv6 = (function() {
    function IPv6(parts) {
      var part, _i, _len;
      if (parts.length !== 8) {
        throw new Error("ipaddr: ipv6 part count should be 8");
      }
      for (_i = 0, _len = parts.length; _i < _len; _i++) {
        part = parts[_i];
        if (!((0 <= part && part <= 0xffff))) {
          throw new Error("ipaddr: ipv6 part should fit to two octets");
        }
      }
      this.parts = parts;
    }

    IPv6.prototype.kind = function() {
      return 'ipv6';
    };

    IPv6.prototype.toString = function() {
      var compactStringParts, part, pushPart, state, stringParts, _i, _len;
      stringParts = (function() {
        var _i, _len, _ref, _results;
        _ref = this.parts;
        _results = [];
        for (_i = 0, _len = _ref.length; _i < _len; _i++) {
          part = _ref[_i];
          _results.push(part.toString(16));
        }
        return _results;
      }).call(this);
      compactStringParts = [];
      pushPart = function(part) {
        return compactStringParts.push(part);
      };
      state = 0;
      for (_i = 0, _len = stringParts.length; _i < _len; _i++) {
        part = stringParts[_i];
        switch (state) {
          case 0:
            if (part === '0') {
              pushPart('');
            } else {
              pushPart(part);
            }
            state = 1;
            break;
          case 1:
            if (part === '0') {
              state = 2;
            } else {
              pushPart(part);
            }
            break;
          case 2:
            if (part !== '0') {
              pushPart('');
              pushPart(part);
              state = 3;
            }
            break;
          case 3:
            pushPart(part);
        }
      }
      if (state === 2) {
        pushPart('');
        pushPart('');
      }
      return compactStringParts.join(":");
    };

    IPv6.prototype.toByteArray = function() {
      var bytes, part, _i, _len, _ref;
      bytes = [];
      _ref = this.parts;
      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
        part = _ref[_i];
        bytes.push(part >> 8);
        bytes.push(part & 0xff);
      }
      return bytes;
    };

    IPv6.prototype.toNormalizedString = function() {
      var part;
      return ((function() {
        var _i, _len, _ref, _results;
        _ref = this.parts;
        _results = [];
        for (_i = 0, _len = _ref.length; _i < _len; _i++) {
          part = _ref[_i];
          _results.push(part.toString(16));
        }
        return _results;
      }).call(this)).join(":");
    };

    IPv6.prototype.match = function(other, cidrRange) {
      if (other.kind() !== 'ipv6') {
        throw new Error("ipaddr: cannot match ipv6 address with non-ipv6 one");
      }
      return matchCIDR(this.parts, other.parts, 16, cidrRange);
    };

    IPv6.prototype.SpecialRanges = {
      unspecified: [new IPv6([0, 0, 0, 0, 0, 0, 0, 0]), 128],
      linkLocal: [new IPv6([0xfe80, 0, 0, 0, 0, 0, 0, 0]), 10],
      multicast: [new IPv6([0xff00, 0, 0, 0, 0, 0, 0, 0]), 8],
      loopback: [new IPv6([0, 0, 0, 0, 0, 0, 0, 1]), 128],
      uniqueLocal: [new IPv6([0xfc00, 0, 0, 0, 0, 0, 0, 0]), 7],
      ipv4Mapped: [new IPv6([0, 0, 0, 0, 0, 0xffff, 0, 0]), 96],
      rfc6145: [new IPv6([0, 0, 0, 0, 0xffff, 0, 0, 0]), 96],
      rfc6052: [new IPv6([0x64, 0xff9b, 0, 0, 0, 0, 0, 0]), 96],
      '6to4': [new IPv6([0x2002, 0, 0, 0, 0, 0, 0, 0]), 16],
      teredo: [new IPv6([0x2001, 0, 0, 0, 0, 0, 0, 0]), 32],
      reserved: [[new IPv6([0x2001, 0xdb8, 0, 0, 0, 0, 0, 0]), 32]]
    };

    IPv6.prototype.range = function() {
      return ipaddr.subnetMatch(this, this.SpecialRanges);
    };

    IPv6.prototype.isIPv4MappedAddress = function() {
      return this.range() === 'ipv4Mapped';
    };

    IPv6.prototype.toIPv4Address = function() {
      var high, low, _ref;
      if (!this.isIPv4MappedAddress()) {
        throw new Error("ipaddr: trying to convert a generic ipv6 address to ipv4");
      }
      _ref = this.parts.slice(-2), high = _ref[0], low = _ref[1];
      return new ipaddr.IPv4([high >> 8, high & 0xff, low >> 8, low & 0xff]);
    };

    return IPv6;

  })();

  ipv6Part = "(?:[0-9a-f]+::?)+";

  ipv6Regexes = {
    "native": new RegExp("^(::)?(" + ipv6Part + ")?([0-9a-f]+)?(::)?$", 'i'),
    transitional: new RegExp(("^((?:" + ipv6Part + ")|(?:::)(?:" + ipv6Part + ")?)") + ("" + ipv4Part + "\\." + ipv4Part + "\\." + ipv4Part + "\\." + ipv4Part + "$"), 'i')
  };

  expandIPv6 = function(string, parts) {
    var colonCount, lastColon, part, replacement, replacementCount;
    if (string.indexOf('::') !== string.lastIndexOf('::')) {
      return null;
    }
    colonCount = 0;
    lastColon = -1;
    while ((lastColon = string.indexOf(':', lastColon + 1)) >= 0) {
      colonCount++;
    }
    if (string[0] === ':') {
      colonCount--;
    }
    if (string[string.length - 1] === ':') {
      colonCount--;
    }
    replacementCount = parts - colonCount;
    replacement = ':';
    while (replacementCount--) {
      replacement += '0:';
    }
    string = string.replace('::', replacement);
    if (string[0] === ':') {
      string = string.slice(1);
    }
    if (string[string.length - 1] === ':') {
      string = string.slice(0, -1);
    }
    return (function() {
      var _i, _len, _ref, _results;
      _ref = string.split(":");
      _results = [];
      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
        part = _ref[_i];
        _results.push(parseInt(part, 16));
      }
      return _results;
    })();
  };

  ipaddr.IPv6.parser = function(string) {
    var match, parts;
    if (string.match(ipv6Regexes['native'])) {
      return expandIPv6(string, 8);
    } else if (match = string.match(ipv6Regexes['transitional'])) {
      parts = expandIPv6(match[1].slice(0, -1), 6);
      if (parts) {
        parts.push(parseInt(match[2]) << 8 | parseInt(match[3]));
        parts.push(parseInt(match[4]) << 8 | parseInt(match[5]));
        return parts;
      }
    }
    return null;
  };

  ipaddr.IPv4.isIPv4 = ipaddr.IPv6.isIPv6 = function(string) {
    return this.parser(string) !== null;
  };

  ipaddr.IPv4.isValid = ipaddr.IPv6.isValid = function(string) {
    var e;
    try {
      new this(this.parser(string));
      return true;
    } catch (_error) {
      e = _error;
      return false;
    }
  };

  ipaddr.IPv4.parse = ipaddr.IPv6.parse = function(string) {
    var parts;
    parts = this.parser(string);
    if (parts === null) {
      throw new Error("ipaddr: string is not formatted like ip address");
    }
    return new this(parts);
  };

  ipaddr.isValid = function(string) {
    return ipaddr.IPv6.isValid(string) || ipaddr.IPv4.isValid(string);
  };

  ipaddr.parse = function(string) {
    if (ipaddr.IPv6.isIPv6(string)) {
      return ipaddr.IPv6.parse(string);
    } else if (ipaddr.IPv4.isIPv4(string)) {
      return ipaddr.IPv4.parse(string);
    } else {
      throw new Error("ipaddr: the address has neither IPv6 nor IPv4 format");
    }
  };

  ipaddr.process = function(string) {
    var addr;
    addr = this.parse(string);
    if (addr.kind() === 'ipv6' && addr.isIPv4MappedAddress()) {
      return addr.toIPv4Address();
    } else {
      return addr;
    }
  };

}).call(this);