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/minus.h> 00023 #include <drizzled/type/decimal.h> 00024 00025 namespace drizzled 00026 { 00027 00033 void Item_func_minus::fix_length_and_dec() 00034 { 00035 Item_num_op::fix_length_and_dec(); 00036 if (unsigned_flag) 00037 unsigned_flag= 0; 00038 } 00039 00040 00041 double Item_func_minus::real_op() 00042 { 00043 double value= args[0]->val_real() - args[1]->val_real(); 00044 if ((null_value=args[0]->null_value || args[1]->null_value)) 00045 return 0.0; 00046 return fix_result(value); 00047 } 00048 00049 00050 int64_t Item_func_minus::int_op() 00051 { 00052 int64_t value=args[0]->val_int() - args[1]->val_int(); 00053 if ((null_value=args[0]->null_value || args[1]->null_value)) 00054 return 0; 00055 return value; 00056 } 00057 00062 type::Decimal *Item_func_minus::decimal_op(type::Decimal *decimal_value) 00063 { 00064 type::Decimal value1, *val1; 00065 type::Decimal value2, *val2= 00066 00067 val1= args[0]->val_decimal(&value1); 00068 if ((null_value= args[0]->null_value)) 00069 return 0; 00070 val2= args[1]->val_decimal(&value2); 00071 if (!(null_value= (args[1]->null_value || 00072 (class_decimal_sub(E_DEC_FATAL_ERROR, decimal_value, val1, 00073 val2) > 3)))) 00074 return decimal_value; 00075 return 0; 00076 } 00077 00078 } /* namespace drizzled */