1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
/* Copyright (C) 2000 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/* This implements 'user defined functions' */
#include <drizzled/server_includes.h>
#include <drizzled/gettext.h>
#include <drizzled/sql_udf.h>
#include <map>
#include <string>
using namespace std;
static bool udf_startup= false; /* We do not lock because startup is single threaded */
static map<string, Function_builder *> udf_map;
/* This is only called if using_udf_functions != 0 */
Function_builder *find_udf(const char *name, uint32_t length)
{
/**
* @todo: check without transform, then check with transform if needed
*/
Function_builder *udf= NULL;
if (udf_startup == false)
return NULL;
string find_str(name, length);
transform(find_str.begin(), find_str.end(),
find_str.begin(), ::tolower);
map<string, Function_builder *>::iterator find_iter;
find_iter= udf_map.find(find_str);
if (find_iter != udf_map.end())
udf= (*find_iter).second;
return (udf);
}
static bool add_udf(Function_builder *udf)
{
/**
* @todo: add all lower and all upper version
*/
string add_str= udf->get_name();
transform(add_str.begin(), add_str.end(),
add_str.begin(), ::tolower);
udf_map[add_str]= udf;
using_udf_functions= 1;
return true;
}
int initialize_udf(st_plugin_int *plugin)
{
Function_builder *f;
udf_startup= true;
if (plugin->plugin->init)
{
int r;
if ((r= plugin->plugin->init((void *)&f)))
{
errmsg_printf(ERRMSG_LVL_ERROR,
_("Plugin '%s' init function returned error %d."),
plugin->name.str, r);
return r;
}
}
else
return 1;
if (!add_udf(f))
return 1;
plugin->state= PLUGIN_IS_READY;
return 0;
}
int finalize_udf(st_plugin_int *plugin)
{
Function_builder *udff = (Function_builder *)plugin->data;
/* TODO: Issue warning on failure */
if (udff && plugin->plugin->deinit)
(void)plugin->plugin->deinit(udff);
if (udff)
free(udff);
return 0;
}
|