mariadb/include/my_decimal_limits.h

#ifndef MY_DECIMAL_LIMITS_INCLUDED
#define MY_DECIMAL_LIMITS_INCLUDED
/* Copyright (c) 2011 Monty Program 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 */

#define DECIMAL_LONGLONG_DIGITS 22
#define DECIMAL_LONG_DIGITS 10
#define DECIMAL_LONG3_DIGITS 8

/** maximum length of buffer in our big digits (uint32). */
#define DECIMAL_BUFF_LENGTH 9

/* the number of digits that my_decimal can possibly contain */
#define DECIMAL_MAX_POSSIBLE_PRECISION (DECIMAL_BUFF_LENGTH * 9)


/**
  maximum guaranteed precision of number in decimal digits (number of our
  digits * number of decimal digits in one our big digit - number of decimal
  digits in one our big digit decreased by 1 (because we always put decimal
  point on the border of our big digits))
*/
#define DECIMAL_MAX_PRECISION (DECIMAL_MAX_POSSIBLE_PRECISION - 8*2)
#define DECIMAL_MAX_SCALE 30
#define DECIMAL_NOT_SPECIFIED 31

/**
  maximum length of string representation (number of maximum decimal
  digits + 1 position for sign + 1 position for decimal point, no terminator)
*/
#define DECIMAL_MAX_STR_LENGTH (DECIMAL_MAX_POSSIBLE_PRECISION + 2)

#endif /* MY_DECIMAL_LIMITS_INCLUDED */