Fan.Sys.Map.ro C# (CSharp) Method

        public Map ro()
        {
            if (m_isReadonly) return this;
              if (m_readonlyMap == null)
              {
            Map ro = new Map(m_type);
            ro.m_map = m_map;
            ro.m_isReadonly  = true;
            ro.m_caseInsensitive = m_caseInsensitive;
            ro.m_def = m_def;
            m_readonlyMap = ro;
              }
              return m_readonlyMap;
        }

        private static MimeType parse(string s)
        {
            int    slash = s.IndexOf('/');
            string media = s.Substring(0, slash);
            string sub   = s.Substring(slash + 1);
            Map    pars  = emptyParams();

            int semi = sub.IndexOf(';');

            if (semi > 0)
            {
                pars = doParseParams(sub, semi + 1);
                sub  = sub.Substring(0, semi).Trim();
            }

            MimeType r = new MimeType();

            r.m_str       = s;
            r.m_mediaType = FanStr.lower(media);
            r.m_subType   = FanStr.lower(sub);
            r.m_params    = pars.ro();
            return(r);
        }