System.Net.FtpClient.FtpListItem.ParseMachineList C# (CSharp) Method

        static FtpListItem ParseMachineList(string buf, FtpCapability capabilities)
        {
            FtpListItem item = new FtpListItem();
            Match m;

            if (!(m = Regex.Match(buf, "type=(?<type>.+?);", RegexOptions.IgnoreCase)).Success)
                return null;

            switch (m.Groups["type"].Value.ToLower()) {
                case "dir":
                    item.Type = FtpFileSystemObjectType.Directory;
                    break;
                case "file":
                    item.Type = FtpFileSystemObjectType.File;
                    break;
                // These are not supported for now.
                case "link":
                case "device":
                default:
                    return null;
            }

            if ((m = Regex.Match(buf, "; (?<name>.*)$", RegexOptions.IgnoreCase)).Success)
                item.Name = m.Groups["name"].Value;
            else // if we can't parse the file name there is a problem.
                return null;

            if ((m = Regex.Match(buf, "modify=(?<modify>.+?);", RegexOptions.IgnoreCase)).Success)
                item.Modified = m.Groups["modify"].Value.GetFtpDate(DateTimeStyles.AssumeUniversal);

            if ((m = Regex.Match(buf, "created?=(?<create>.+?);", RegexOptions.IgnoreCase)).Success)
                item.Created = m.Groups["create"].Value.GetFtpDate(DateTimeStyles.AssumeUniversal);

            if ((m = Regex.Match(buf, @"size=(?<size>\d+);", RegexOptions.IgnoreCase)).Success) {
                long size;

                if (long.TryParse(m.Groups["size"].Value, out size))
                    item.Size = size;
            }

            if ((m = Regex.Match(buf, @"unix.mode=(?<mode>\d+);", RegexOptions.IgnoreCase)).Success) {
                if (m.Groups["mode"].Value.Length == 4) {
                    item.SpecialPermissions = (FtpSpecialPermissions)int.Parse(m.Groups["mode"].Value[0].ToString());
                    item.OwnerPermissions = (FtpPermission)int.Parse(m.Groups["mode"].Value[1].ToString());
                    item.GroupPermissions = (FtpPermission)int.Parse(m.Groups["mode"].Value[2].ToString());
                    item.OthersPermissions = (FtpPermission)int.Parse(m.Groups["mode"].Value[3].ToString());
                }
                else if (m.Groups["mode"].Value.Length == 3) {
                    item.OwnerPermissions = (FtpPermission)int.Parse(m.Groups["mode"].Value[0].ToString());
                    item.GroupPermissions = (FtpPermission)int.Parse(m.Groups["mode"].Value[1].ToString());
                    item.OthersPermissions = (FtpPermission)int.Parse(m.Groups["mode"].Value[2].ToString());
                }
            }

            return item;
        }