← Back to branch summary

~drizzle-trunk/drizzle/development

« back to all changes in this revision

Viewing changes to drizzled/functions/additive_op.cc

  • Committer: Monty Taylor
  • Date: 2008-09-15 17:24:04 UTC
  • Revision ID: monty@inaugust.com-20080915172404-ygh6hiyu0q7qpa9x
Removed strndup calls.

Show diffs side-by-side

added added

removed removed

Lines of Context:
drizzled/functions/additive_op.cc
1
 
/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
2
 
 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
3
 
 *
4
 
 *  Copyright (C) 2008 Sun Microsystems
5
 
 *
6
 
 *  This program is free software; you can redistribute it and/or modify
7
 
 *  it under the terms of the GNU General Public License as published by
8
 
 *  the Free Software Foundation; version 2 of the License.
9
 
 *
10
 
 *  This program is distributed in the hope that it will be useful,
11
 
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
12
 
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13
 
 *  GNU General Public License for more details.
14
 
 *
15
 
 *  You should have received a copy of the GNU General Public License
16
 
 *  along with this program; if not, write to the Free Software
17
 
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
18
 
 */
19
 
 
20
 
#include <drizzled/server_includes.h>
21
 
#include CSTDINT_H
22
 
#include <drizzled/functions/additive_op.h>
23
 
 
24
 
/**
25
 
  Set precision of results for additive operations (+ and -)
26
 
*/
27
 
void Item_func_additive_op::result_precision()
28
 
{
29
 
  decimals= cmax(args[0]->decimals, args[1]->decimals);
30
 
  int max_int_part= cmax(args[0]->decimal_precision() - args[0]->decimals,
31
 
                        args[1]->decimal_precision() - args[1]->decimals);
32
 
  int precision= cmin(max_int_part + 1 + decimals, DECIMAL_MAX_PRECISION);
33
 
 
34
 
  /* Integer operations keep unsigned_flag if one of arguments is unsigned */
35
 
  if (result_type() == INT_RESULT)
36
 
    unsigned_flag= args[0]->unsigned_flag | args[1]->unsigned_flag;
37
 
  else
38
 
    unsigned_flag= args[0]->unsigned_flag & args[1]->unsigned_flag;
39
 
  max_length= my_decimal_precision_to_length(precision, decimals,
40
 
                                             unsigned_flag);
41
 
}
42