content: /*
   * Copyright (c) 2015, 2021, Oracle and/or its affiliates.
   *
   * This program is free software; you can redistribute it and/or modify it under
   * the terms of the GNU General Public License, version 2.0, as published by the
   * Free Software Foundation.
   *
   * This program is also distributed with certain software (including but not
   * limited to OpenSSL) that is licensed under separate terms, as designated in a
   * particular file or component or in included license documentation. The
   * authors of MySQL hereby grant you an additional permission to link the
   * program and your derivative works with the separately licensed software that
   * they have included with MySQL.
   *
   * Without limiting anything contained in the foregoing, this file, which is
   * part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
   * version 1.0, a copy of which can be found at
   * http://oss.oracle.com/licenses/universal-foss-exception.
   *
   * This program is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
   * FOR A PARTICULAR PURPOSE. See the GNU General Public License, version 2.0,
   * for more details.
   *
   * You should have received a copy of the GNU General Public License along with
   * this program; if not, write to the Free Software Foundation, Inc.,
   * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
   */
  
  package com.mysql.cj.protocol.a;
  
  /**
   * Constants specific to legacy MySQL protocol
   *
   */
  public class NativeConstants {
  
      /** Maximum size of MySQL packet payload. */
      public static final int MAX_PACKET_SIZE = 256 * 256 * 256 - 1;
      /** Size of MySQL packet header (payload size + packet sequence ID). */
      public static final int HEADER_LENGTH = 4;
      public static final int SEED_LENGTH = 20;
  
      /* Type ids of response packets. */
      public static final short TYPE_ID_ERROR = 0xFF;
      public static final short TYPE_ID_EOF = 0xFE;
      public static final short TYPE_ID_LOCAL_INFILE = 0xFB;
      public static final short TYPE_ID_OK = 0;
  
      /* MySQL binary protocol value lengths. */
      public static final int BIN_LEN_INT1 = 1;
      public static final int BIN_LEN_INT2 = 2;
      public static final int BIN_LEN_INT4 = 4;
      public static final int BIN_LEN_INT8 = 8;
      public static final int BIN_LEN_FLOAT = 4;
      public static final int BIN_LEN_DOUBLE = 8;
      public static final int BIN_LEN_DATE = 4;
      public static final int BIN_LEN_TIMESTAMP_NO_FRAC = 7;
      public static final int BIN_LEN_TIMESTAMP_WITH_MICROS = 11;
      public static final int BIN_LEN_TIMESTAMP_WITH_TZ = 13;
      public static final int BIN_LEN_TIME_NO_FRAC = 8;
      public static final int BIN_LEN_TIME_WITH_MICROS = 12;
  
      /*
       * Command signatures
       */
      public static final int COM_SLEEP = 0;
      public static final int COM_QUIT = 1;
      public static final int COM_INIT_DB = 2;
      public static final int COM_QUERY = 3;
      public static final int COM_FIELD_LIST = 4; // Not used; deprecated in MySQL 5.7.11 and MySQL 8.0.0.
      public static final int COM_CREATE_DB = 5; // Not used; deprecated?
      public static final int COM_DROP_DB = 6; // Not used; deprecated?
      public static final int COM_REFRESH = 7; // Not used; deprecated in MySQL 5.7.11 and MySQL 8.0.0.
      public static final int COM_SHUTDOWN = 8; // Deprecated in MySQL 5.7.9 and MySQL 8.0.0.
      public static final int COM_STATISTICS = 9;
      public static final int COM_PROCESS_INFO = 10; // Not used; deprecated in MySQL 5.7.11 and MySQL 8.0.0.
      public static final int COM_CONNECT = 11;
      public static final int COM_PROCESS_KILL = 12; // Not used; deprecated in MySQL 5.7.11 and MySQL 8.0.0.
      public static final int COM_DEBUG = 13;
      public static final int COM_PING = 14;
      public static final int COM_TIME = 15;
      public static final int COM_DELAYED_INSERT = 16;
      public static final int COM_CHANGE_USER = 17;
      public static final int COM_BINLOG_DUMP = 18;
      public static final int COM_TABLE_DUMP = 19;
      public static final int COM_CONNECT_OUT = 20;
      @Deprecated
      public static final int COM_REGISTER_SLAVE = 21;
      public static final int COM_STMT_PREPARE = 22;
      public static final int COM_STMT_EXECUTE = 23;
      public static final int COM_STMT_SEND_LONG_DATA = 24;
      public static final int COM_STMT_CLOSE = 25;
      public static final int COM_STMT_RESET = 26;
      public static final int COM_SET_OPTION = 27;
      public static final int COM_STMT_FETCH = 28;
      public static final int COM_DAEMON = 29;
      public static final int COM_BINLOG_DUMP_GTID = 30;
      public static final int COM_RESET_CONNECTION = 31;
  
      /**
       * Used to indicate that the server sent no field-level character set information, so the driver should use the connection-level character encoding instead.
       */
      public static final int NO_CHARSET_INFO = -1;
  
      /**
       * Basic protocol data types as they are defined in http://dev.mysql.com/doc/internals/en/integer.html
       *
       */
      public enum IntegerDataType {
  
          /**
           * 1 byte Protocol::FixedLengthInteger
           */
          INT1,
  
          /**
           * 2 byte Protocol::FixedLengthInteger
           */
          INT2,
  
          /**
           * 3 byte Protocol::FixedLengthInteger
           */
          INT3,
  
          /**
           * 4 byte Protocol::FixedLengthInteger
           */
          INT4,
  
          /**
           * 6 byte Protocol::FixedLengthInteger
           */
          INT6,
  
          /**
           * 8 byte Protocol::FixedLengthInteger
           */
          INT8,
  
          /**
           * Length-Encoded Integer Type
           */
          INT_LENENC;
      }
  
      /**
       * Basic protocol data types as they are defined in http://dev.mysql.com/doc/internals/en/string.html
       * which require explicit length specification.
       *
       */
      public static enum StringLengthDataType {
  
          /**
           * Protocol::FixedLengthString
           * Fixed-length strings have a known, hardcoded length.
           */
          STRING_FIXED,
  
          /**
           * Protocol::VariableLengthString
           * The length of the string is determined by another field or is calculated at runtime
           */
          STRING_VAR;
      }
  
      /**
       * Basic self-describing protocol data types as they are defined in http://dev.mysql.com/doc/internals/en/string.html
       *
       */
      public static enum StringSelfDataType {
  
          /**
           * Protocol::NulTerminatedString
           * Strings that are terminated by a [00] byte.
           */
          STRING_TERM,
  
          /**
           * Protocol::LengthEncodedString
           * A length encoded string is a string that is prefixed with length encoded integer describing the length of the string.
           * It is a special case of Protocol::VariableLengthString
           */
          STRING_LENENC,
  
          /**
           * Protocol::RestOfPacketString
           * If a string is the last component of a packet, its length can be calculated from the overall packet length minus the current position.
           */
          STRING_EOF;
      }
  
      public NativeConstants() {
          super();
      }
  }
  