~drizzle-trunk/drizzle/development

/* Copyright (C) 2003 MySQL AB

   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

#include <sys/types.h>

#include <sys/stat.h>

class Transparent_file

{

  File filedes;

  uchar *buff;  /* in-memory window to the file or mmaped area */

  /* current window sizes */

  off_t lower_bound;

  off_t upper_bound;

  uint buff_size;

public:

  Transparent_file();

  ~Transparent_file();

  void init_buff(File filedes_arg);

  uchar *ptr();

  off_t start();

  off_t end();

  char get_value (off_t offset);

  off_t read_next();

};