#ifndef ITEM_INETFUNC_INCLUDED
#define ITEM_INETFUNC_INCLUDED

/* Copyright (c) 2011, 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.

   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 */

#include "my_global.h"
#include "item_cmpfunc.h"  // Item_bool_func
#include "item_strfunc.h"  // Item_str_func

/*************************************************************************
  Item_func_inet_aton implements INET_ATON() SQL-function.
*************************************************************************/

class Item_func_inet_aton : public Item_int_func
{
public:
  inline Item_func_inet_aton(const POS &pos, Item *arg)
    : Item_int_func(pos, arg)
  {}

public:
  virtual longlong val_int();

  virtual const char *func_name() const
  { return "inet_aton"; }

  virtual void fix_length_and_dec()
  {
    decimals= 0;
    max_length= 21;
    maybe_null= 1;
    unsigned_flag= 1;
  }
};


/*************************************************************************
  Item_func_inet_ntoa implements INET_NTOA() SQL-function.
*************************************************************************/

class Item_func_inet_ntoa : public Item_str_func
{
public:
  inline Item_func_inet_ntoa(const POS &pos, Item *arg)
    : Item_str_func(pos, arg)
  { }

public:
  virtual String* val_str(String* str);

  virtual const char *func_name() const
  { return "inet_ntoa"; }

  virtual void fix_length_and_dec()
  {
    decimals= 0;
    fix_length_and_charset(3 * 8 + 7, default_charset());
    maybe_null= 1;
  }
};


/*************************************************************************
  Item_func_inet_bool_base implements common code for INET6/IP-related
  functions returning boolean value.
*************************************************************************/

class Item_func_inet_bool_base : public Item_bool_func
{
public:
  Item_func_inet_bool_base(const POS &pos, Item *ip_addr)
    : Item_bool_func(pos, ip_addr)
  {
    null_value= false;
  }

public:
  virtual longlong val_int();

protected:
  virtual bool calc_value(const String *arg) = 0;
};


/*************************************************************************
  Item_func_inet_str_base implements common code for INET6/IP-related
  functions returning string value.
*************************************************************************/

class Item_func_inet_str_base : public Item_str_ascii_func
{
public:
  Item_func_inet_str_base(const POS &pos, Item *arg)
    : Item_str_ascii_func(pos, arg)
  { }

public:
  virtual String *val_str_ascii(String *buffer);

protected:
  virtual bool calc_value(String *arg, String *buffer) = 0;
};


/*************************************************************************
  Item_func_inet6_aton implements INET6_ATON() SQL-function.
*************************************************************************/

class Item_func_inet6_aton : public Item_func_inet_str_base
{
public:
  Item_func_inet6_aton(const POS &pos, Item *ip_addr)
    : Item_func_inet_str_base(pos, ip_addr)
  { }

public:
  virtual const char *func_name() const
  { return "inet6_aton"; }

  virtual void fix_length_and_dec()
  {
    decimals= 0;
    fix_length_and_charset(16, &my_charset_bin);
    maybe_null= 1;
  }

protected:
  virtual bool calc_value(String *arg, String *buffer);
};


/*************************************************************************
  Item_func_inet6_ntoa implements INET6_NTOA() SQL-function.
*************************************************************************/

class Item_func_inet6_ntoa : public Item_func_inet_str_base
{
public:
  Item_func_inet6_ntoa(const POS &pos, Item *ip_addr)
    : Item_func_inet_str_base(pos, ip_addr)
  { }

public:
  virtual const char *func_name() const
  { return "inet6_ntoa"; }

  virtual void fix_length_and_dec()
  {
    decimals= 0;

    // max length: IPv6-address -- 16 bytes
    // 16 bytes / 2 bytes per group == 8 groups => 7 delimiter
    // 4 symbols per group
    fix_length_and_charset(8 * 4 + 7, default_charset());

    maybe_null= 1;
  }

protected:
  virtual bool calc_value(String *arg, String *buffer);
};


/*************************************************************************
  Item_func_is_ipv4 implements IS_IPV4() SQL-function.
*************************************************************************/

class Item_func_is_ipv4 : public Item_func_inet_bool_base
{
public:
  Item_func_is_ipv4(const POS &pos, Item *ip_addr)
    : Item_func_inet_bool_base(pos, ip_addr)
  { }

public:
  virtual const char *func_name() const
  { return "is_ipv4"; }

protected:
  virtual bool calc_value(const String *arg);
};


/*************************************************************************
  Item_func_is_ipv6 implements IS_IPV6() SQL-function.
*************************************************************************/

class Item_func_is_ipv6 : public Item_func_inet_bool_base
{
public:
  Item_func_is_ipv6(const POS &pos, Item *ip_addr)
    : Item_func_inet_bool_base(pos, ip_addr)
  { }

public:
  virtual const char *func_name() const
  { return "is_ipv6"; }

protected:
  virtual bool calc_value(const String *arg);
};


/*************************************************************************
  Item_func_is_ipv4_compat implements IS_IPV4_COMPAT() SQL-function.
*************************************************************************/

class Item_func_is_ipv4_compat : public Item_func_inet_bool_base
{
public:
  Item_func_is_ipv4_compat(const POS &pos, Item *ip_addr)
    : Item_func_inet_bool_base(pos, ip_addr)
  { }

public:
  virtual const char *func_name() const
  { return "is_ipv4_compat"; }

protected:
  virtual bool calc_value(const String *arg);
};


/*************************************************************************
  Item_func_is_ipv4_mapped implements IS_IPV4_MAPPED() SQL-function.
*************************************************************************/

class Item_func_is_ipv4_mapped : public Item_func_inet_bool_base
{
public:
  Item_func_is_ipv4_mapped(const POS &pos, Item *ip_addr)
    : Item_func_inet_bool_base(pos, ip_addr)
  { }

public:
  virtual const char *func_name() const
  { return "is_ipv4_mapped"; }

protected:
  virtual bool calc_value(const String *arg);
};

#endif // ITEM_INETFUNC_INCLUDED
