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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 Sun Microsystems, Inc.
*
* 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; version 2 of the License.
*
* 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
*/
#pragma once
#include <drizzled/item/basic_constant.h>
#include <drizzled/charset.h>
namespace drizzled {
class Item_string : public Item_basic_constant
{
public:
Item_string(str_ref str, const charset_info_st* cs, Derivation dv= DERIVATION_COERCIBLE)
{
assert(not (str.size() % cs->mbminlen));
str_value.set(str.data(), str.size(), cs);
collation.set(cs, dv);
/*
We have to have a different max_length than 'length' here to
ensure that we get the right length if we do use the item
to create a new table. In this case max_length must be the maximum
number of chars for a string of this type because we in CreateField::
divide the max_length with mbmaxlen).
*/
max_length= str_value.numchars() * cs->mbmaxlen;
set_name(str.data(), str.size(), cs);
decimals=NOT_FIXED_DEC;
// it is constant => can be used without fix_fields (and frequently used)
fixed= 1;
}
Item_string(const char *str,uint32_t length,
const charset_info_st * const cs, Derivation dv= DERIVATION_COERCIBLE)
{
assert(not (length % cs->mbminlen));
str_value.set(str, length, cs);
collation.set(cs, dv);
/*
We have to have a different max_length than 'length' here to
ensure that we get the right length if we do use the item
to create a new table. In this case max_length must be the maximum
number of chars for a string of this type because we in CreateField::
divide the max_length with mbmaxlen).
*/
max_length= str_value.numchars()*cs->mbmaxlen;
set_name(str, length, cs);
decimals=NOT_FIXED_DEC;
// it is constant => can be used without fix_fields (and frequently used)
fixed= 1;
}
/* Just create an item and do not fill string representation */
Item_string(const charset_info_st * const cs, Derivation dv= DERIVATION_COERCIBLE)
{
collation.set(cs, dv);
max_length= 0;
set_name(NULL, 0, cs);
decimals= NOT_FIXED_DEC;
fixed= 1;
}
Item_string(const char *name_par, const char *str, uint32_t length,
const charset_info_st * const cs, Derivation dv= DERIVATION_COERCIBLE)
{
assert(not (length % cs->mbminlen));
str_value.set(str, length, cs);
collation.set(cs, dv);
max_length= str_value.numchars()*cs->mbmaxlen;
set_name(name_par, 0, cs);
decimals=NOT_FIXED_DEC;
// it is constant => can be used without fix_fields (and frequently used)
fixed= 1;
}
enum Type type() const { return STRING_ITEM; }
double val_real();
int64_t val_int();
String *val_str(String*)
{
assert(fixed == 1);
return (String*) &str_value;
}
type::Decimal *val_decimal(type::Decimal *);
int save_in_field(Field *field, bool no_conversions);
enum Item_result result_type () const { return STRING_RESULT; }
enum_field_types field_type() const { return DRIZZLE_TYPE_VARCHAR; }
bool basic_const_item() const { return 1; }
bool eq(const Item *item, bool binary_cmp) const;
Item *clone_item()
{
return new Item_string(name, str_value.ptr(), str_value.length(), collation.collation);
}
Item *safe_charset_converter(const charset_info_st * const tocs);
inline void append(str_ref v)
{
str_value.append(v);
max_length= str_value.numchars() * collation.collation->mbmaxlen;
}
virtual void print(String *str);
};
class Item_static_string_func : public Item_string
{
const char *func_name;
public:
Item_static_string_func(const char *name_par, str_ref str, const charset_info_st* cs, Derivation dv= DERIVATION_COERCIBLE) :
Item_string(NULL, str.data(), str.size(), cs, dv), func_name(name_par)
{}
Item *safe_charset_converter(const charset_info_st*);
virtual inline void print(String *str)
{
str->append(func_name);
}
};
} /* namespace drizzled */
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