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Diffstat (limited to 'sql/tztime.h')
| -rw-r--r-- | sql/tztime.h | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/sql/tztime.h b/sql/tztime.h new file mode 100644 index 00000000..9e5d4699 --- /dev/null +++ b/sql/tztime.h @@ -0,0 +1,93 @@ +#ifndef TZTIME_INCLUDED +#define TZTIME_INCLUDED + +/* Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved. + + 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 02110-1335 USA */ + + +#ifdef USE_PRAGMA_INTERFACE +#pragma interface /* gcc class interface */ +#endif + +#include "my_time.h" /* my_time_t */ +#include "mysql_time.h" /* MYSQL_TIME */ +#include "sql_list.h" /* Sql_alloc */ +#include "sql_string.h" /* String */ + +class THD; + +#if !defined(TESTTIME) && !defined(TZINFO2SQL) + +class THD; + +/** + 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. May set error_code to ER_WARN_DATA_OUT_OF_RANGE + or ER_WARN_INVALID_TIMESTAMP, see TIME_to_timestamp()) + */ + virtual my_time_t TIME_to_gmt_sec(const MYSQL_TIME *t, + uint *error_code) 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() {}; + +protected: + static inline void adjust_leap_second(MYSQL_TIME *t); +}; + +extern Time_zone * my_tz_UTC; +extern MYSQL_PLUGIN_IMPORT Time_zone * my_tz_SYSTEM; +extern Time_zone * my_tz_OFFSET0; +extern Time_zone * my_tz_find(THD *thd, const String *name); +extern my_bool my_tz_init(THD *org_thd, const char *default_tzname, my_bool bootstrap); +extern void my_tz_free(); +extern my_time_t sec_since_epoch_TIME(MYSQL_TIME *t); + +/** + Number of elements in table list produced by my_tz_get_table_list() + (this table list contains tables which are needed for dynamical loading + of time zone descriptions). Actually it is imlementation detail that + should not be used anywhere outside of tztime.h and tztime.cc. +*/ + +static const int MY_TZ_TABLES_COUNT= 4; + +#endif /* !defined(TESTTIME) && !defined(TZINFO2SQL) */ +#endif /* TZTIME_INCLUDED */ |