Drizzled Public API Documentation

abs.cc
1 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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3  *
4  * Copyright (C) 2008 Sun Microsystems, Inc.
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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 
22 #include <math.h>
23 #include "abs.h"
24 #include <drizzled/type/decimal.h>
25 
26 namespace drizzled
27 {
28 
30 {
31  double value= args[0]->val_real();
32  null_value= args[0]->null_value;
33  return fabs(value);
34 }
35 
36 
38 {
39  int64_t value= args[0]->val_int();
40  if ((null_value= args[0]->null_value))
41  return 0;
42  return (value >= 0) || unsigned_flag ? value : -value;
43 }
44 
45 
47 {
48  type::Decimal val, *value= args[0]->val_decimal(&val);
49  if (!(null_value= args[0]->null_value))
50  {
51  class_decimal2decimal(value, decimal_value);
52  if (decimal_value->sign())
53  class_decimal_neg(decimal_value);
54  return decimal_value;
55  }
56  return 0;
57 }
58 
59 
60 void Item_func_abs::fix_length_and_dec()
61 {
62  Item_func_num1::fix_length_and_dec();
63  unsigned_flag= args[0]->unsigned_flag;
64 }
65 
66 } /* 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: abs.cc:37
type::Decimal * decimal_op(type::Decimal *)
Performs the operation that this functions implements when the result type is DECIMAL.
Definition: abs.cc:46
bool null_value
Definition: item.h:122
virtual double val_real()=0
double real_op()
Performs the operation that this functions implements when the result type is REAL.
Definition: abs.cc:29
virtual type::Decimal * val_decimal(type::Decimal *decimal_buffer)=0