Drizzled Public API Documentation

plus.cc

00001 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
00002  *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
00003  *
00004  *  Copyright (C) 2008 Sun Microsystems, Inc.
00005  *
00006  *  This program is free software; you can redistribute it and/or modify
00007  *  it under the terms of the GNU General Public License as published by
00008  *  the Free Software Foundation; version 2 of the License.
00009  *
00010  *  This program is distributed in the hope that it will be useful,
00011  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00012  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013  *  GNU General Public License for more details.
00014  *
00015  *  You should have received a copy of the GNU General Public License
00016  *  along with this program; if not, write to the Free Software
00017  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
00018  */
00019 
00020 #include <config.h>
00021 
00022 #include <drizzled/function/math/plus.h>
00023 
00024 namespace drizzled
00025 {
00026 
00027 double Item_func_plus::real_op()
00028 {
00029   double value= args[0]->val_real() + args[1]->val_real();
00030   if ((null_value=args[0]->null_value || args[1]->null_value))
00031     return 0.0;
00032   return fix_result(value);
00033 }
00034 
00035 
00036 int64_t Item_func_plus::int_op()
00037 {
00038   int64_t value=args[0]->val_int()+args[1]->val_int();
00039   if ((null_value=args[0]->null_value || args[1]->null_value))
00040     return 0;
00041   return value;
00042 }
00043 
00044 
00056 type::Decimal *Item_func_plus::decimal_op(type::Decimal *decimal_value)
00057 {
00058   type::Decimal value1, *val1;
00059   type::Decimal value2, *val2;
00060   val1= args[0]->val_decimal(&value1);
00061   if ((null_value= args[0]->null_value))
00062     return 0;
00063   val2= args[1]->val_decimal(&value2);
00064   if (!(null_value= (args[1]->null_value ||
00065                      (class_decimal_add(E_DEC_FATAL_ERROR, decimal_value, val1,
00066                                      val2) > 3))))
00067     return decimal_value;
00068   return 0;
00069 }
00070 
00071 } /* namespace drizzled */