574.3.4
by Lee
moving functions from item_strfunc to functions/str directory |
1 |
/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
|
2 |
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
|
|
3 |
*
|
|
1999.6.1
by kalebral at gmail
update Copyright strings to a more common format to help with creating the master debian copyright file |
4 |
* Copyright (C) 2008 Sun Microsystems, Inc.
|
574.3.4
by Lee
moving functions from item_strfunc to functions/str directory |
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 |
||
2173.2.1
by Monty Taylor
Fixes incorrect usage of include |
20 |
#include <config.h> |
1280.1.10
by Monty Taylor
Put everything in drizzled into drizzled namespace. |
21 |
|
670.1.20
by Monty Taylor
Renamed functions to function... everything else is singular. |
22 |
#include <drizzled/function/str/left.h> |
574.3.4
by Lee
moving functions from item_strfunc to functions/str directory |
23 |
|
1280.1.10
by Monty Taylor
Put everything in drizzled into drizzled namespace. |
24 |
namespace drizzled |
25 |
{
|
|
26 |
||
574.3.4
by Lee
moving functions from item_strfunc to functions/str directory |
27 |
String *Item_func_left::val_str(String *str) |
28 |
{
|
|
29 |
assert(fixed == 1); |
|
30 |
String *res= args[0]->val_str(str); |
|
31 |
||
32 |
/* must be int64_t to avoid truncation */
|
|
33 |
int64_t length= args[1]->val_int(); |
|
34 |
uint32_t char_pos; |
|
660.1.3
by Eric Herman
removed trailing whitespace with simple script: |
35 |
|
574.3.4
by Lee
moving functions from item_strfunc to functions/str directory |
36 |
if ((null_value=(args[0]->null_value || args[1]->null_value))) |
37 |
return 0; |
|
38 |
||
39 |
/* if "unsigned_flag" is set, we have a *huge* positive number. */
|
|
40 |
if ((length <= 0) && (!args[1]->unsigned_flag)) |
|
41 |
return &my_empty_string; |
|
42 |
||
43 |
if ((res->length() <= (uint64_t) length) || |
|
44 |
(res->length() <= (char_pos= res->charpos((int) length)))) |
|
45 |
return res; |
|
46 |
||
47 |
tmp_value.set(*res, 0, char_pos); |
|
48 |
return &tmp_value; |
|
49 |
}
|
|
50 |
||
51 |
void Item_func_left::fix_length_and_dec() |
|
52 |
{
|
|
53 |
collation.set(args[0]->collation); |
|
54 |
left_right_max_length(); |
|
55 |
}
|
|
56 |
||
1280.1.10
by Monty Taylor
Put everything in drizzled into drizzled namespace. |
57 |
} /* namespace drizzled */ |