~drizzle-trunk/drizzle/development

/* - mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-

 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:

 *

 *  Copyright (C) 2008 MySQL

 *

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License as published by

 *  the Free Software Foundation; either version 2 of the License, or

 *  (at your option) any later version.

 *

 *  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 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

 */

#ifndef DRIZZLE_SERVER_FIELD_ENUM

#define DRIZZLE_SERVER_FIELD_ENUM

#include <drizzled/field/str.h>

class Field_enum :public Field_str {

protected:

  uint32_t packlength;

public:

  using Field::store;

  using Field::val_int;

  using Field::val_str;

  using Field::cmp;

  TYPELIB *typelib;

  Field_enum(unsigned char *ptr_arg, uint32_t len_arg, unsigned char *null_ptr_arg,

             unsigned char null_bit_arg,

             enum utype unireg_check_arg, const char *field_name_arg,

             uint32_t packlength_arg,

             TYPELIB *typelib_arg,

             const CHARSET_INFO * const charset_arg)

    :Field_str(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,

	       unireg_check_arg, field_name_arg, charset_arg),

    packlength(packlength_arg),typelib(typelib_arg)

  {

      flags|=ENUM_FLAG;

  }

  Field *new_field(MEM_ROOT *root, Table *new_table, bool keep_type);

  enum_field_types type() const { return DRIZZLE_TYPE_ENUM; }

  enum Item_result cmp_type () const { return INT_RESULT; }

  enum Item_result cast_to_int_type () const { return INT_RESULT; }

  enum ha_base_keytype key_type() const;

  int  store(const char *to,uint32_t length, const CHARSET_INFO * const charset);

  int  store(double nr);

  int  store(int64_t nr, bool unsigned_val);

  double val_real(void);

  int64_t val_int(void);

  String *val_str(String*,String *);

  int cmp(const unsigned char *,const unsigned char *);

  void sort_string(unsigned char *buff,uint32_t length);

  uint32_t pack_length() const { return (uint32_t) packlength; }

  void store_type(uint64_t value);

  void sql_type(String &str) const;

  uint32_t size_of() const { return sizeof(*this); }

  enum_field_types real_type() const { return DRIZZLE_TYPE_ENUM; }

  uint32_t pack_length_from_metadata(uint32_t field_metadata)

  { return (field_metadata & 0x00ff); }

  uint32_t row_pack_length() { return pack_length(); }

  virtual bool zero_pack() const { return 0; }

  bool optimize_range(uint32_t, uint32_t)

  { return 0; }

  bool eq_def(Field *field);

  bool has_charset(void) const { return true; }

  /* enum and set are sorted as integers */

  const CHARSET_INFO *sort_charset(void) const { return &my_charset_bin; }

private:

  int do_save_field_metadata(unsigned char *first_byte);

};

#endif