~drizzle-trunk/drizzle/development

642.1.6 by Lee
move functions from item.cc/item.h to item directory
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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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 *
1999.6.1 by kalebral at gmail
update Copyright strings to a more common format to help with creating the master debian copyright file
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 *  Copyright (C) 2008 Sun Microsystems, Inc.
642.1.6 by Lee
move functions from item.cc/item.h to item directory
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 *
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 *  This program is free software; you can redistribute it and/or modify
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 *  it under the terms of the GNU General Public License as published by
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 *  the Free Software Foundation; version 2 of the License.
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 *
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 *  This program is distributed in the hope that it will be useful,
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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 *  GNU General Public License for more details.
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 *
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 *  You should have received a copy of the GNU General Public License
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 *  along with this program; if not, write to the Free Software
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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 */
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1122.2.10 by Monty Taylor
Fixed all of the include guards.
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#ifndef DRIZZLED_ITEM_STRING_H
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#define DRIZZLED_ITEM_STRING_H
642.1.6 by Lee
move functions from item.cc/item.h to item directory
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642.1.62 by Lee
more header file cleanup
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#include <drizzled/item/basic_constant.h>
2154.2.4 by Brian Aker
This fixes 716459
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#include <drizzled/charset_info.h>
642.1.62 by Lee
more header file cleanup
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1280.1.10 by Monty Taylor
Put everything in drizzled into drizzled namespace.
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namespace drizzled
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{
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642.1.6 by Lee
move functions from item.cc/item.h to item directory
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class Item_string :public Item_basic_constant
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{
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public:
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  Item_string(const char *str,uint32_t length,
1022.1.3 by Brian Aker
Force UTF8 (remove the bits for looking for ascii).
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              const CHARSET_INFO * const cs, Derivation dv= DERIVATION_COERCIBLE)
642.1.6 by Lee
move functions from item.cc/item.h to item directory
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    : m_cs_specified(false)
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  {
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    str_value.set_or_copy_aligned(str, length, cs);
1022.1.3 by Brian Aker
Force UTF8 (remove the bits for looking for ascii).
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    collation.set(cs, dv);
642.1.6 by Lee
move functions from item.cc/item.h to item directory
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    /*
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      We have to have a different max_length than 'length' here to
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      ensure that we get the right length if we do use the item
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      to create a new table. In this case max_length must be the maximum
1052.2.3 by Nathan Williams
No actual code changes. Changed Create_field to CreateField to be consistent with coding standards.
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      number of chars for a string of this type because we in CreateField::
642.1.6 by Lee
move functions from item.cc/item.h to item directory
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      divide the max_length with mbmaxlen).
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    */
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    max_length= str_value.numchars()*cs->mbmaxlen;
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    set_name(str, length, cs);
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    decimals=NOT_FIXED_DEC;
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    // it is constant => can be used without fix_fields (and frequently used)
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    fixed= 1;
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  }
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  /* Just create an item and do not fill string representation */
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  Item_string(const CHARSET_INFO * const cs, Derivation dv= DERIVATION_COERCIBLE)
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    : m_cs_specified(false)
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  {
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    collation.set(cs, dv);
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    max_length= 0;
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    set_name(NULL, 0, cs);
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    decimals= NOT_FIXED_DEC;
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    fixed= 1;
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  }
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  Item_string(const char *name_par, const char *str, uint32_t length,
1022.1.3 by Brian Aker
Force UTF8 (remove the bits for looking for ascii).
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              const CHARSET_INFO * const cs, Derivation dv= DERIVATION_COERCIBLE)
642.1.6 by Lee
move functions from item.cc/item.h to item directory
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    : m_cs_specified(false)
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  {
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    str_value.set_or_copy_aligned(str, length, cs);
1022.1.3 by Brian Aker
Force UTF8 (remove the bits for looking for ascii).
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    collation.set(cs, dv);
642.1.6 by Lee
move functions from item.cc/item.h to item directory
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    max_length= str_value.numchars()*cs->mbmaxlen;
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    set_name(name_par, 0, cs);
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    decimals=NOT_FIXED_DEC;
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    // it is constant => can be used without fix_fields (and frequently used)
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    fixed= 1;
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  }
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  enum Type type() const { return STRING_ITEM; }
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  double val_real();
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  int64_t val_int();
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  String *val_str(String*)
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  {
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    assert(fixed == 1);
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    return (String*) &str_value;
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  }
2030.1.4 by Brian Aker
Change my_decimal to Decimal
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  type::Decimal *val_decimal(type::Decimal *);
642.1.6 by Lee
move functions from item.cc/item.h to item directory
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  int save_in_field(Field *field, bool no_conversions);
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  enum Item_result result_type () const { return STRING_RESULT; }
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  enum_field_types field_type() const { return DRIZZLE_TYPE_VARCHAR; }
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  bool basic_const_item() const { return 1; }
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  bool eq(const Item *item, bool binary_cmp) const;
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  Item *clone_item()
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  {
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    return new Item_string(name, str_value.ptr(),
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    			   str_value.length(), collation.collation);
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  }
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  Item *safe_charset_converter(const CHARSET_INFO * const tocs);
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  inline void append(char *str, uint32_t length)
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  {
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    str_value.append(str, length);
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    max_length= str_value.numchars() * collation.collation->mbmaxlen;
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  }
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  virtual void print(String *str, enum_query_type query_type);
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  /**
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    Return true if character-set-introducer was explicitly specified in the
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    original query for this item (text literal).
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    This operation is to be called from Item_string::print(). The idea is
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    that when a query is generated (re-constructed) from the Item-tree,
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    character-set-introducers should appear only for those literals, where
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    they were explicitly specified by the user. Otherwise, that may lead to
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    loss collation information (character set introducers implies default
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    collation for the literal).
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    Basically, that makes sense only for views and hopefully will be gone
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    one day when we start using original query as a view definition.
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    @return This operation returns the value of m_cs_specified attribute.
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      @retval true if character set introducer was explicitly specified in
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      the original query.
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      @retval false otherwise.
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  */
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  inline bool is_cs_specified() const
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  {
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    return m_cs_specified;
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  }
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  /**
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    Set the value of m_cs_specified attribute.
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    m_cs_specified attribute shows whether character-set-introducer was
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    explicitly specified in the original query for this text literal or
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    not. The attribute makes sense (is used) only for views.
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    This operation is to be called from the parser during parsing an input
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    query.
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  */
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  inline void set_cs_specified(bool cs_specified)
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  {
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    m_cs_specified= cs_specified;
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  }
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private:
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  bool m_cs_specified;
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};
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class Item_static_string_func :public Item_string
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{
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  const char *func_name;
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public:
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  Item_static_string_func(const char *name_par, const char *str, uint32_t length,
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                          const CHARSET_INFO * const cs,
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                          Derivation dv= DERIVATION_COERCIBLE)
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    :Item_string(NULL, str, length, cs, dv), func_name(name_par)
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  {}
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  Item *safe_charset_converter(const CHARSET_INFO * const tocs);
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  virtual inline void print(String *str, enum_query_type)
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  {
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    str->append(func_name);
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  }
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};
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1280.1.10 by Monty Taylor
Put everything in drizzled into drizzled namespace.
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} /* namespace drizzled */
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1122.2.10 by Monty Taylor
Fixed all of the include guards.
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#endif /* DRIZZLED_ITEM_STRING_H */