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/* - 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 DRIZZLED_FIELD_ENUM_H
#define DRIZZLED_FIELD_ENUM_H
#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;
/** Internal storage for the string values of the ENUM */
TYPELIB *typelib;
Field_enum(unsigned char *ptr_arg,
uint32_t len_arg,
unsigned char *null_ptr_arg,
unsigned char null_bit_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,
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 ha_base_keytype key_type() const;
int store(const char *to, uint32_t length, const CHARSET_INFO * const);
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);
void store_type(uint64_t value);
void sql_type(String &str) const;
bool eq_def(Field *field);
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;
}
uint32_t pack_length() const
{
return (uint32_t) packlength;
}
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 false;
}
bool optimize_range(uint32_t, uint32_t)
{
return false;
}
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 /* DRIZZLED_FIELD_ENUM_H */
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