Drizzled Public API Documentation

floor.cc
1 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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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.
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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.
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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 "floor.h"
23 
24 #include <drizzled/type/decimal.h>
25 
26 namespace drizzled
27 {
28 
30 {
31  int64_t result;
32  switch (args[0]->result_type()) {
33  case INT_RESULT:
34  result= args[0]->val_int();
35  null_value= args[0]->null_value;
36  break;
37  case DECIMAL_RESULT:
38  {
39  type::Decimal dec_buf, *dec;
40  if ((dec= Item_func_floor::decimal_op(&dec_buf)))
41  dec->val_int32(E_DEC_FATAL_ERROR, unsigned_flag, &result);
42  else
43  result= 0;
44  break;
45  }
46  default:
47  result= (int64_t)Item_func_floor::real_op();
48  };
49  return result;
50 }
51 
53 {
54  /*
55  the volatile's for BUG #3051 to calm optimizer down (because of gcc's
56  bug)
57  */
58  volatile double value= args[0]->val_real();
59  null_value= args[0]->null_value;
60  return floor(value);
61 }
62 
63 
65 {
66  type::Decimal val, *value= args[0]->val_decimal(&val);
67  if (!(null_value= (args[0]->null_value ||
68  class_decimal_floor(E_DEC_FATAL_ERROR, value,
69  decimal_value) > 1)))
70  return decimal_value;
71  return 0;
72 }
73 
74 } /* namespace drizzled */
virtual int64_t val_int()=0
TODO: Rename this file - func.h is stupid.
bool null_value
Definition: item.h:122
virtual double val_real()=0
int64_t int_op()
Performs the operation that this functions implements when the result type is INT.
Definition: floor.cc:29
virtual type::Decimal * val_decimal(type::Decimal *decimal_buffer)=0
double real_op()
Performs the operation that this functions implements when the result type is REAL.
Definition: floor.cc:52
type::Decimal * decimal_op(type::Decimal *)
Performs the operation that this functions implements when the result type is DECIMAL.
Definition: floor.cc:64