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
|
/* Copyright (C) 2004 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 */
#ifdef USE_PRAGMA_INTERFACE
#pragma interface /* gcc class interface */
#endif
/**
This class represents abstract time zone and provides
basic interface for MYSQL_TIME <-> my_time_t conversion.
Actual time zones which are specified by DB, or via offset
or use system functions are its descendants.
*/
class Time_zone: public Sql_alloc
{
public:
Time_zone() {} /* Remove gcc warning */
/**
Converts local time in broken down MYSQL_TIME representation to
my_time_t (UTC seconds since Epoch) represenation.
Returns 0 in case of error. Sets in_dst_time_gap to true if date provided
falls into spring time-gap (or lefts it untouched otherwise).
*/
virtual my_time_t TIME_to_gmt_sec(const MYSQL_TIME *t,
bool *in_dst_time_gap) const = 0;
/**
Converts time in my_time_t representation to local time in
broken down MYSQL_TIME representation.
*/
virtual void gmt_sec_to_TIME(MYSQL_TIME *tmp, my_time_t t) const = 0;
/**
Because of constness of String returned by get_name() time zone name
have to be already zeroended to be able to use String::ptr() instead
of c_ptr().
*/
virtual const String * get_name() const = 0;
/**
We need this only for surpressing warnings, objects of this type are
allocated on MEM_ROOT and should not require destruction.
*/
virtual ~Time_zone() {};
};
extern Time_zone * my_tz_UTC;
extern Time_zone * my_tz_SYSTEM;
extern Time_zone * my_tz_OFFSET0;
extern Time_zone * my_tz_find(THD *thd, const String *name);
extern bool my_tz_init(THD *org_thd, const char *default_tzname, bool bootstrap);
extern void my_tz_free();
extern my_time_t sec_since_epoch_TIME(MYSQL_TIME *t);
|