Drizzled Public API Documentation

abs.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 <math.h>
00023 #include "abs.h"
00024 #include <drizzled/type/decimal.h>
00025 
00026 namespace drizzled
00027 {
00028 
00029 double Item_func_abs::real_op()
00030 {
00031   double value= args[0]->val_real();
00032   null_value= args[0]->null_value;
00033   return fabs(value);
00034 }
00035 
00036 
00037 int64_t Item_func_abs::int_op()
00038 {
00039   int64_t value= args[0]->val_int();
00040   if ((null_value= args[0]->null_value))
00041     return 0;
00042   return (value >= 0) || unsigned_flag ? value : -value;
00043 }
00044 
00045 
00046 type::Decimal *Item_func_abs::decimal_op(type::Decimal *decimal_value)
00047 {
00048   type::Decimal val, *value= args[0]->val_decimal(&val);
00049   if (!(null_value= args[0]->null_value))
00050   {
00051     class_decimal2decimal(value, decimal_value);
00052     if (decimal_value->sign())
00053       class_decimal_neg(decimal_value);
00054     return decimal_value;
00055   }
00056   return 0;
00057 }
00058 
00059 
00060 void Item_func_abs::fix_length_and_dec()
00061 {
00062   Item_func_num1::fix_length_and_dec();
00063   unsigned_flag= args[0]->unsigned_flag;
00064 }
00065 
00066 } /* namespace drizzled */