Drizzled Public API Documentation

ceiling.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, Inc.
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 <config.h>
21 #include <math.h>
22 #include "ceiling.h"
23 #include <drizzled/type/decimal.h>
24 
25 namespace drizzled
26 {
27 
29 {
30  int64_t result;
31  switch (args[0]->result_type()) {
32  case INT_RESULT:
33  result= args[0]->val_int();
34  null_value= args[0]->null_value;
35  break;
36  case DECIMAL_RESULT:
37  {
38  type::Decimal dec_buf, *dec;
39  if ((dec= Item_func_ceiling::decimal_op(&dec_buf)))
40  dec->val_int32(E_DEC_FATAL_ERROR, unsigned_flag, &result);
41  else
42  result= 0;
43  break;
44  }
45  default:
46  result= (int64_t)Item_func_ceiling::real_op();
47  };
48  return result;
49 }
50 
52 {
53  /*
54  the volatile's for BUG #3051 to calm optimizer down (because of gcc's
55  bug)
56  */
57  volatile double value= args[0]->val_real();
58  null_value= args[0]->null_value;
59  return ceil(value);
60 }
61 
63 {
64  type::Decimal val, *value= args[0]->val_decimal(&val);
65  if (!(null_value= (args[0]->null_value ||
66  class_decimal_ceiling(E_DEC_FATAL_ERROR, value,
67  decimal_value) > 1)))
68  return decimal_value;
69  return 0;
70 }
71 
72 } /* namespace drizzled */
virtual int64_t val_int()=0
TODO: Rename this file - func.h is stupid.
int64_t int_op()
Performs the operation that this functions implements when the result type is INT.
Definition: ceiling.cc:28
bool null_value
Definition: item.h:122
virtual double val_real()=0
virtual type::Decimal * val_decimal(type::Decimal *decimal_buffer)=0
type::Decimal * decimal_op(type::Decimal *)
Performs the operation that this functions implements when the result type is DECIMAL.
Definition: ceiling.cc:62
double real_op()
Performs the operation that this functions implements when the result type is REAL.
Definition: ceiling.cc:51