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/*
* Copyright (c) 2002-2018 Balabit
* Copyright (c) 1998-2018 Balázs Scheidler
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As an additional exemption you are allowed to compile & link against the
* OpenSSL libraries as published by the OpenSSL project. See the file
* COPYING for details.
*
*/
#ifndef UNIXTIME_H_INCLUDED
#define UNIXTIME_H_INCLUDED
#include "timeutils/zoneinfo.h"
#include <stdint.h>
/*
* This class represents a UNIX timestamp (as measured in time_t), the
* fractions of a second (in microseconds) and an associated GMT timezone
* offset. In concept it is the combination of "struct timeval" and the
* number of seconds compared to GMT.
*
* In concept, this is similar to WallClockTime, with the difference that
* this represents the time in seconds since the UNIX epoch.
*
* In design, it is also similar to WallClockTime, the original intention
* was to use an embedded "struct timeval", however that would enlarge the
* LogMessage structure with a lot of padding (the struct would go from 16
* to 24 bytes and we have 3 of these structs in LogMessage).
*/
typedef struct _UnixTime UnixTime;
struct _UnixTime
{
gint64 ut_sec;
guint32 ut_usec;
/* zone offset in seconds, add this to UTC to get the time in local. This
* is just 32 bits, contrary to all other gmtoff variables, as we are
* squeezed in space with this struct. 32 bit is more than enough for
* +/-24*3600 */
gint32 ut_gmtoff;
};
#define UNIX_TIME_INIT { -1, 0, -1 }
static inline gboolean
unix_time_is_set(const UnixTime *ut)
{
return ut->ut_sec != -1;
}
static inline gboolean
unix_time_is_timezone_set(const UnixTime *self)
{
return self->ut_gmtoff != -1;
}
void unix_time_unset(UnixTime *ut);
void unix_time_set_now(UnixTime *self);
void unix_time_set_timezone(UnixTime *self, gint new_gmtoff);
void unix_time_set_timezone_with_tzinfo(UnixTime *self, TimeZoneInfo *tzinfo);
void unix_time_fix_timezone(UnixTime *self, gint new_gmtoff);
void unix_time_fix_timezone_with_tzinfo(UnixTime *self, TimeZoneInfo *tzinfo);
gboolean unix_time_fix_timezone_assuming_the_time_matches_real_time(UnixTime *self);
gboolean unix_time_eq(const UnixTime *a, const UnixTime *b);
gint64 unix_time_diff_in_seconds(const UnixTime *a, const UnixTime *b);
gint64 unix_time_diff_in_msec(const UnixTime *a, const UnixTime *b);
struct timeval timeval_from_unix_time(UnixTime *ut);
UnixTime unix_time_from_unix_epoch(guint64 unix_epoch);
guint64 unix_time_to_unix_epoch(const UnixTime ut);
#endif
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