|
492.3.8
by Lee
code clean move Item_func_mod, Item_func_int_div, Item_func_neg to functions directory |
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
|
|
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 <drizzled/server_includes.h> |
|
21 |
#include CSTDINT_H
|
|
|
670.1.20
by Monty Taylor
Renamed functions to function... everything else is singular. |
22 |
#include <drizzled/function/neg.h> |
|
492.3.8
by Lee
code clean move Item_func_mod, Item_func_int_div, Item_func_neg to functions directory |
23 |
|
24 |
double Item_func_neg::real_op() |
|
25 |
{
|
|
26 |
double value= args[0]->val_real(); |
|
27 |
null_value= args[0]->null_value; |
|
28 |
return -value; |
|
29 |
}
|
|
30 |
||
31 |
||
32 |
int64_t Item_func_neg::int_op() |
|
33 |
{
|
|
34 |
int64_t value= args[0]->val_int(); |
|
35 |
null_value= args[0]->null_value; |
|
36 |
return -value; |
|
37 |
}
|
|
38 |
||
39 |
||
40 |
my_decimal *Item_func_neg::decimal_op(my_decimal *decimal_value) |
|
41 |
{
|
|
42 |
my_decimal val, *value= args[0]->val_decimal(&val); |
|
43 |
if (!(null_value= args[0]->null_value)) |
|
44 |
{
|
|
45 |
my_decimal2decimal(value, decimal_value); |
|
46 |
my_decimal_neg(decimal_value); |
|
47 |
return decimal_value; |
|
48 |
}
|
|
49 |
return 0; |
|
50 |
}
|
|
51 |
||
52 |
||
53 |
void Item_func_neg::fix_num_length_and_dec() |
|
54 |
{
|
|
55 |
decimals= args[0]->decimals; |
|
56 |
/* 1 add because sign can appear */
|
|
57 |
max_length= args[0]->max_length + 1; |
|
58 |
}
|
|
59 |
||
60 |
||
61 |
void Item_func_neg::fix_length_and_dec() |
|
62 |
{
|
|
63 |
Item_func_num1::fix_length_and_dec(); |
|
64 |
||
65 |
/*
|
|
66 |
If this is in integer context keep the context as integer if possible
|
|
67 |
(This is how multiplication and other integer functions works)
|
|
68 |
Use val() to get value as arg_type doesn't mean that item is
|
|
69 |
Item_int or Item_real due to existence of Item_param.
|
|
70 |
*/
|
|
71 |
if (hybrid_type == INT_RESULT && args[0]->const_item()) |
|
72 |
{
|
|
73 |
int64_t val= args[0]->val_int(); |
|
74 |
if ((uint64_t) val >= (uint64_t) INT64_MIN && |
|
75 |
((uint64_t) val != (uint64_t) INT64_MIN || |
|
|
660.1.3
by Eric Herman
removed trailing whitespace with simple script: |
76 |
args[0]->type() != INT_ITEM)) |
|
492.3.8
by Lee
code clean move Item_func_mod, Item_func_int_div, Item_func_neg to functions directory |
77 |
{
|
78 |
/*
|
|
79 |
Ensure that result is converted to DECIMAL, as int64_t can't hold
|
|
80 |
the negated number
|
|
81 |
*/
|
|
82 |
hybrid_type= DECIMAL_RESULT; |
|
83 |
}
|
|
84 |
}
|
|
85 |
unsigned_flag= 0; |
|
86 |
return; |
|
87 |
}
|