MySql.Data.MySqlClient.CharSetMap.GetMaxLength C# (CSharp) Method

        internal static int GetMaxLength(string charset, MySqlConnection connection)
        {
            lock (lockObject)
            {
                if (maxLengths == null)
                    InitCollections(connection);
            }

            if (!maxLengths.ContainsKey(charset))
                return 1;
            return maxLengths[charset];
        }
    }

    /// <summary>
    ///  Parses out the elements of a procedure parameter data type.
    /// </summary>
    private string ParseDataType(MySqlSchemaRow row, MySqlTokenizer tokenizer)
    {
      StringBuilder dtd = new StringBuilder(
          StringUtility.ToUpperInvariant(tokenizer.NextToken()));
      row["DATA_TYPE"] = dtd.ToString();
      string type = row["DATA_TYPE"].ToString();

      string token = tokenizer.NextToken();
      if (token == "(")
      {
        token = tokenizer.ReadParenthesis();
        dtd.AppendFormat(CultureInfo.InvariantCulture, "{0}", token);
        if (type != "ENUM" && type != "SET")
          ParseDataTypeSize(row, token);
        token = tokenizer.NextToken();
      }
      else
        dtd.Append(GetDataTypeDefaults(type, row));

      while (token != ")" &&
             token != "," &&
             String.Compare(token, "begin", StringComparison.OrdinalIgnoreCase) != 0 &&
             String.Compare(token, "return", StringComparison.OrdinalIgnoreCase) != 0)
      {
        if (String.Compare(token, "CHARACTER", StringComparison.OrdinalIgnoreCase) == 0 ||
            String.Compare(token, "BINARY", StringComparison.OrdinalIgnoreCase) == 0)
        { }  // we don't need to do anything with this
        else if (String.Compare(token, "SET", StringComparison.OrdinalIgnoreCase) == 0 ||
                 String.Compare(token, "CHARSET", StringComparison.OrdinalIgnoreCase) == 0)
          row["CHARACTER_SET_NAME"] = tokenizer.NextToken();
        else if (String.Compare(token, "ASCII", StringComparison.OrdinalIgnoreCase) == 0)
          row["CHARACTER_SET_NAME"] = "latin1";
        else if (String.Compare(token, "UNICODE", StringComparison.OrdinalIgnoreCase) == 0)
          row["CHARACTER_SET_NAME"] = "ucs2";
        else if (String.Compare(token, "COLLATE", StringComparison.OrdinalIgnoreCase) == 0)
          row["COLLATION_NAME"] = tokenizer.NextToken();
        else
          dtd.AppendFormat(CultureInfo.InvariantCulture, " {0}", token);
        token = tokenizer.NextToken();
      }

      if (dtd.Length > 0)
        row["DTD_IDENTIFIER"] = dtd.ToString();

      // now default the collation if one wasn't given
      if ( string.IsNullOrEmpty( ( string )row["COLLATION_NAME"] ) &&
          !string.IsNullOrEmpty( ( string )row["CHARACTER_SET_NAME"] ))
        row["COLLATION_NAME"] = CharSetMap.GetDefaultCollation(
            row["CHARACTER_SET_NAME"].ToString(), connection);

      // now set the octet length
      if (row["CHARACTER_MAXIMUM_LENGTH"] != null)
      {
        if (row["CHARACTER_SET_NAME"] == null)
          row["CHARACTER_SET_NAME"] = "";
        row["CHARACTER_OCTET_LENGTH"] =
            CharSetMap.GetMaxLength(( string )row["CHARACTER_SET_NAME"], connection) *
            (int)row["CHARACTER_MAXIMUM_LENGTH"];
      }

      return token;
    }