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Иван Мажукин
mpd
Commits
a2387210
Commit
a2387210
authored
Aug 10, 2021
by
Max Kellermann
Committed by
Max Kellermann
Aug 10, 2021
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time/FileTime: move code to SystemClock.hxx
parent
d7e7adb4
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2 changed files
with
67 additions
and
14 deletions
+67
-14
FileTime.hxx
src/time/FileTime.hxx
+5
-14
SystemClock.hxx
src/time/SystemClock.hxx
+62
-0
No files found.
src/time/FileTime.hxx
View file @
a2387210
/*
/*
* Copyright 2013-20
19
Max Kellermann <max.kellermann@gmail.com>
* Copyright 2013-20
21
Max Kellermann <max.kellermann@gmail.com>
*
*
* Redistribution and use in source and binary forms, with or without
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* modification, are permitted provided that the following conditions
...
@@ -30,6 +30,8 @@
...
@@ -30,6 +30,8 @@
#ifndef FILE_TIME_HXX
#ifndef FILE_TIME_HXX
#define FILE_TIME_HXX
#define FILE_TIME_HXX
#include "SystemClock.hxx"
#include <fileapi.h>
#include <fileapi.h>
#include <chrono>
#include <chrono>
...
@@ -108,15 +110,7 @@ FileTimeToUnixEpochDuration(FILETIME ft) noexcept
...
@@ -108,15 +110,7 @@ FileTimeToUnixEpochDuration(FILETIME ft) noexcept
inline
std
::
chrono
::
system_clock
::
time_point
inline
std
::
chrono
::
system_clock
::
time_point
FileTimeToChrono
(
FILETIME
ft
)
noexcept
FileTimeToChrono
(
FILETIME
ft
)
noexcept
{
{
/* this is guaranteed to be 0 in C++20 */
return
TimePointAfterUnixEpoch
(
FileTimeToUnixEpochDuration
(
ft
));
const
auto
unix_epoch
=
std
::
chrono
::
system_clock
::
from_time_t
(
0
);
const
auto
windows_duration
=
FileTimeToUnixEpochDuration
(
ft
);
const
auto
sys_duration
=
std
::
chrono
::
duration_cast
<
std
::
chrono
::
system_clock
::
duration
>
(
windows_duration
);
return
unix_epoch
+
sys_duration
;
}
}
constexpr
FILETIME
constexpr
FILETIME
...
@@ -143,10 +137,7 @@ UnixEpochDurationToFileTime(FileTimeDuration d) noexcept
...
@@ -143,10 +137,7 @@ UnixEpochDurationToFileTime(FileTimeDuration d) noexcept
inline
FILETIME
inline
FILETIME
ChronoToFileTime
(
std
::
chrono
::
system_clock
::
time_point
tp
)
noexcept
ChronoToFileTime
(
std
::
chrono
::
system_clock
::
time_point
tp
)
noexcept
{
{
/* this is guaranteed to be 0 in C++20 */
const
auto
since_unix_epoch
=
DurationSinceUnixEpoch
(
tp
);
const
auto
unix_epoch
=
std
::
chrono
::
system_clock
::
from_time_t
(
0
);
const
auto
since_unix_epoch
=
tp
-
unix_epoch
;
const
auto
ft_since_unix_epoch
=
const
auto
ft_since_unix_epoch
=
std
::
chrono
::
duration_cast
<
FileTimeDuration
>
(
since_unix_epoch
);
std
::
chrono
::
duration_cast
<
FileTimeDuration
>
(
since_unix_epoch
);
...
...
src/time/SystemClock.hxx
0 → 100644
View file @
a2387210
/*
* Copyright 2021 Max Kellermann <max.kellermann@gmail.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <chrono>
/**
* Calculate a std::chrono::system_clock::time_point from a duration
* relative to the UNIX epoch (1970-01-01T00:00Z).
*/
template
<
class
Rep
,
class
Period
>
[[
gnu
::
const
]]
std
::
chrono
::
system_clock
::
time_point
TimePointAfterUnixEpoch
(
const
std
::
chrono
::
duration
<
Rep
,
Period
>
&
d
)
noexcept
{
/* this is guaranteed to be 0 in C++20 */
const
auto
unix_epoch
=
std
::
chrono
::
system_clock
::
from_time_t
(
0
);
return
unix_epoch
+
std
::
chrono
::
duration_cast
<
std
::
chrono
::
system_clock
::
duration
>
(
d
);
}
/**
* Calculate the duration that has passed since the UNIX epoch
* (1970-01-01T00:00Z).
*/
[[
gnu
::
const
]]
inline
std
::
chrono
::
system_clock
::
duration
DurationSinceUnixEpoch
(
const
std
::
chrono
::
system_clock
::
time_point
&
tp
)
noexcept
{
/* this is guaranteed to be 0 in C++20 */
const
auto
unix_epoch
=
std
::
chrono
::
system_clock
::
from_time_t
(
0
);
return
tp
-
unix_epoch
;
}
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