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/*
* Copyright (c) 2018 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef included_time_range_h
#define included_time_range_h
#include <vppinfra/format.h>
#include <vppinfra/time.h>
typedef enum
{
CLIB_TIMEBASE_DAYLIGHT_NONE = 0,
CLIB_TIMEBASE_DAYLIGHT_USA,
} clib_timebase_daylight_time_t;
typedef struct
{
/* provides f64 seconds since clib_time_init was called */
clib_time_t clib_time;
/*
* time in f64 seconds since Thursday 1 Jan 1970 00:00:00 UTC
* when clib_time_init was called
*/
f64 time_zero;
f64 timezone_offset;
f64 summer_offset;
clib_timebase_daylight_time_t daylight_time_type;
f64 cached_year_start;
f64 cached_year_end;
f64 cached_summer_start;
f64 cached_summer_end;
} clib_timebase_t;
typedef struct
{
u32 year, month, day, hour, minute, second, nanosecond;
/* 0 => Thursday */
u32 day_name_index;
f64 fractional_seconds;
} clib_timebase_component_t;
typedef struct
{
f64 start, end;
} clib_timebase_range_t;
void clib_timebase_init (clib_timebase_t * tb, i32 timezone_offset_in_hours,
clib_timebase_daylight_time_t daylight_type);
void clib_timebase_time_to_components (f64 now,
clib_timebase_component_t * cp);
f64 clib_timebase_components_to_time (clib_timebase_component_t * cp);
f64 clib_timebase_find_sunday_midnight (f64 start_time);
f64 clib_timebase_offset_from_sunday (u8 * day);
f64 clib_timebase_summer_offset (clib_timebase_t * tb, f64 now);
unformat_function_t unformat_clib_timebase_range_hms;
unformat_function_t unformat_clib_timebase_range_vector;
format_function_t format_clib_timebase_time;
static inline f64 clib_timebase_summer_offset_fastpath
(clib_timebase_t * tb, f64 now)
{
if (PREDICT_TRUE
(now >= tb->cached_year_start && now <= tb->cached_year_end))
{
if (now >= tb->cached_summer_start && now <= tb->cached_summer_end)
return tb->summer_offset;
else
return 0.0;
}
else
return clib_timebase_summer_offset (tb, now);
}
static inline f64
clib_timebase_now (clib_timebase_t * tb)
{
f64 now;
now = tb->time_zero + clib_time_now (&tb->clib_time);
now += tb->timezone_offset;
now += clib_timebase_summer_offset_fastpath (tb, now);
return now;
}
static inline int
clib_timebase_is_leap_year (u32 year)
{
int rv;
if (PREDICT_TRUE ((year % 4) != 0))
return 0;
rv = 0;
if ((year % 4) == 0)
rv = 1;
if ((year % 100) == 0)
rv = 0;
if ((year % 400) == 0)
rv = 1;
return rv;
}
#endif /* included_time_range_h */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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