~drizzle-trunk/drizzle/development

/* -*- 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/memory/sql_alloc.h>

#include <drizzled/sql_string.h>

namespace drizzled {

class Field;

/**

 * A class for quick copying data to fields

 */

class CopyField :public memory::SqlAlloc

{

  /**

    Convenience definition of a copy function returned by

    get_copy_func.

  */

  typedef void Copy_func(CopyField*);

  Copy_func *get_copy_func(Field *to, Field *from);

public:

  unsigned char *from_ptr;

  unsigned char *to_ptr;

  unsigned char *from_null_ptr;

  unsigned char *to_null_ptr;

  bool *null_row;

  uint32_t from_bit;

  uint32_t to_bit;

  uint32_t from_length;

  uint32_t to_length;

  Field *from_field;

  Field *to_field;

  String tmp;					// For items

  CopyField() :

    from_ptr(0),

    to_ptr(0),

    from_null_ptr(0),

    to_null_ptr(0),

    null_row(0),

    from_bit(0),

    to_bit(0),

    from_length(0),

    to_length(0),

    from_field(0),

    to_field(0)

  {}

  ~CopyField()

  {}

  void set(Field *to,Field *from,bool save);	// Field to field

  void set(unsigned char *to,Field *from);		// Field to string

  void (*do_copy)(CopyField *);

  void (*do_copy2)(CopyField *);		// Used to handle null values

};

} /* namespace drizzled */