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
|
/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 Sun Microsystems, Inc.
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include <drizzled/function/math/int.h>
#include <drizzled/plugin/function.h>
using namespace std;
using namespace drizzled;
class LengthFunction :public Item_int_func
{
String value;
public:
int64_t val_int();
LengthFunction() :Item_int_func() {}
const char *func_name() const
{
return "length";
}
void fix_length_and_dec()
{
max_length= 10;
}
bool check_argument_count(int n)
{
return (n == 1);
}
};
int64_t LengthFunction::val_int()
{
assert(fixed == true);
String *res=args[0]->val_str(&value);
if (res == NULL)
{
null_value= true;
return 0;
}
null_value= false;
return (int64_t) res->length();
}
plugin::Create_function<LengthFunction> *lengthudf= NULL;
plugin::Create_function<LengthFunction> *octet_lengthudf= NULL;
static int initialize(drizzled::module::Context &context)
{
lengthudf= new plugin::Create_function<LengthFunction>("length");
octet_lengthudf= new plugin::Create_function<LengthFunction>("octet_length");
context.add(lengthudf);
context.add(octet_lengthudf);
return 0;
}
DRIZZLE_DECLARE_PLUGIN
{
DRIZZLE_VERSION_ID,
"length",
"1.0",
"Devananda van der Veen",
"Return the byte length of a string",
PLUGIN_LICENSE_GPL,
initialize, /* Plugin Init */
NULL, /* depends */
NULL /* config options */
}
DRIZZLE_DECLARE_PLUGIN_END;
|