/
systime.d
11915 lines (10229 loc) · 517 KB
/
systime.d
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// Written in the D programming language
/++
$(DIVC quickindex,
$(BOOKTABLE,
$(TR $(TH Category) $(TH Functions))
$(TR $(TD Types) $(TD
$(LREF Clock)
$(LREF SysTime)
$(LREF DosFileTime)
))
$(TR $(TD Conversion) $(TD
$(LREF parseRFC822DateTime)
$(LREF DosFileTimeToSysTime)
$(LREF FILETIMEToStdTime)
$(LREF FILETIMEToSysTime)
$(LREF stdTimeToFILETIME)
$(LREF stdTimeToUnixTime)
$(LREF SYSTEMTIMEToSysTime)
$(LREF SysTimeToDosFileTime)
$(LREF SysTimeToFILETIME)
$(LREF SysTimeToSYSTEMTIME)
$(LREF unixTimeToStdTime)
))
))
License: $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
Authors: $(HTTP jmdavisprog.com, Jonathan M Davis)
Source: $(PHOBOSSRC std/datetime/systime.d)
+/
module std.datetime.systime;
version (OSX)
version = Darwin;
else version (iOS)
version = Darwin;
else version (TVOS)
version = Darwin;
else version (WatchOS)
version = Darwin;
/// Get the current time as a $(LREF SysTime)
@safe unittest
{
import std.datetime.timezone : LocalTime;
SysTime today = Clock.currTime();
assert(today.timezone is LocalTime());
}
/// Construct a $(LREF SysTime) from a ISO time string
@safe unittest
{
import std.datetime.date : DateTime;
import std.datetime.timezone : UTC;
auto st = SysTime.fromISOExtString("2018-01-01T10:30:00Z");
assert(st == SysTime(DateTime(2018, 1, 1, 10, 30, 0), UTC()));
}
/// Make a specific point in time in the New York timezone
@safe unittest
{
import core.time : hours;
import std.datetime.date : DateTime;
import std.datetime.timezone : SimpleTimeZone;
auto ny = SysTime(
DateTime(2018, 1, 1, 10, 30, 0),
new immutable SimpleTimeZone(-5.hours, "America/New_York")
);
// ISO standard time strings
assert(ny.toISOString() == "20180101T103000-05:00");
assert(ny.toISOExtString() == "2018-01-01T10:30:00-05:00");
}
// Note: reconsider using specific imports below after
// https://issues.dlang.org/show_bug.cgi?id=17630 has been fixed
import core.time;// : ClockType, convert, dur, Duration, seconds, TimeException;
import std.datetime.date;// : _monthNames, AllowDayOverflow, CmpTimeUnits, Date,
//DateTime, DateTimeException, DayOfWeek, enforceValid, getDayOfWeek, maxDay,
//Month, splitUnitsFromHNSecs, TimeOfDay, validTimeUnits, yearIsLeapYear;
import std.datetime.timezone;// : LocalTime, SimpleTimeZone, TimeZone, UTC;
import std.exception : enforce;
import std.format : format;
import std.range.primitives;
import std.traits : isIntegral, isSigned, isSomeString, isNarrowString;
version (Windows)
{
import core.stdc.time : time_t;
import core.sys.windows.winbase;
import core.sys.windows.winnt;
import core.sys.windows.winsock2;
}
else version (Posix)
{
import core.sys.posix.signal : timespec;
import core.sys.posix.sys.types : time_t;
}
version (StdUnittest)
{
import core.exception : AssertError;
import std.exception : assertThrown;
}
@safe unittest
{
initializeTests();
}
version (unittest) private bool clockSupported(ClockType c)
{
// Skip unsupported clocks on older linux kernels, assume that only
// CLOCK_MONOTONIC and CLOCK_REALTIME exist, as that is the lowest
// common denominator supported by all versions of Linux pre-2.6.12.
version (Linux_Pre_2639)
return c == ClockType.normal || c == ClockType.precise;
else
return true;
}
/++
Effectively a namespace to make it clear that the methods it contains are
getting the time from the system clock. It cannot be instantiated.
+/
final class Clock
{
public:
/++
Returns the current time in the given time zone.
Params:
clockType = The $(REF ClockType, core,time) indicates which system
clock to use to get the current time. Very few programs
need to use anything other than the default.
tz = The time zone for the SysTime that's returned.
Throws:
$(REF DateTimeException,std,datetime,date) if it fails to get the
time.
+/
static SysTime currTime(ClockType clockType = ClockType.normal)(immutable TimeZone tz = LocalTime()) @safe
{
return SysTime(currStdTime!clockType, tz);
}
@safe unittest
{
import std.format : format;
import core.time;
assert(currTime().timezone is LocalTime());
assert(currTime(UTC()).timezone is UTC());
// core.stdc.time.time does not always use unix time on Windows systems.
// In particular, dmc does not use unix time. If we can guarantee that
// the MS runtime uses unix time, then we may be able run this test
// then, but for now, we're just not going to run this test on Windows.
version (Posix)
{
static import core.stdc.time;
static import std.math;
immutable unixTimeD = currTime().toUnixTime();
immutable unixTimeC = core.stdc.time.time(null);
assert(std.math.abs(unixTimeC - unixTimeD) <= 2);
}
auto norm1 = Clock.currTime;
auto norm2 = Clock.currTime(UTC());
assert(norm1 <= norm2, format("%s %s", norm1, norm2));
assert(abs(norm1 - norm2) <= seconds(2));
import std.meta : AliasSeq;
static foreach (ct; AliasSeq!(ClockType.coarse, ClockType.precise, ClockType.second))
{{
static if (clockSupported(ct))
{
auto value1 = Clock.currTime!ct;
auto value2 = Clock.currTime!ct(UTC());
assert(value1 <= value2, format("%s %s (ClockType: %s)", value1, value2, ct));
assert(abs(value1 - value2) <= seconds(2), format("ClockType.%s", ct));
}
}}
}
/++
Returns the number of hnsecs since midnight, January 1st, 1 A.D. for the
current time.
Params:
clockType = The $(REF ClockType, core,time) indicates which system
clock to use to get the current time. Very few programs
need to use anything other than the default.
Throws:
$(REF DateTimeException,std,datetime,date) if it fails to get the
time.
+/
static @property long currStdTime(ClockType clockType = ClockType.normal)() @trusted
{
static if (clockType != ClockType.coarse &&
clockType != ClockType.normal &&
clockType != ClockType.precise &&
clockType != ClockType.second)
{
static assert(0, format("ClockType.%s is not supported by Clock.currTime or Clock.currStdTime", clockType));
}
version (Windows)
{
FILETIME fileTime;
GetSystemTimeAsFileTime(&fileTime);
immutable result = FILETIMEToStdTime(&fileTime);
static if (clockType == ClockType.second)
{
// Ideally, this would use core.std.time.time, but the C runtime
// has to be using unix time for that to work, and that's not
// guaranteed on Windows. Digital Mars does not use unix time.
// MS may or may not. If it does, then this can be made to use
// core.stdc.time for MS, but for now, we'll leave it like this.
return convert!("seconds", "hnsecs")(convert!("hnsecs", "seconds")(result));
}
else
return result;
}
else version (Posix)
{
static import core.stdc.time;
enum hnsecsToUnixEpoch = unixTimeToStdTime(0);
version (Darwin)
{
static if (clockType == ClockType.second)
return unixTimeToStdTime(core.stdc.time.time(null));
else
{
import core.sys.posix.sys.time : gettimeofday, timeval;
timeval tv = void;
// Posix gettimeofday called with a valid timeval address
// and a null second parameter doesn't fail.
gettimeofday(&tv, null);
return convert!("seconds", "hnsecs")(tv.tv_sec) +
tv.tv_usec * 10 +
hnsecsToUnixEpoch;
}
}
else version (linux)
{
static if (clockType == ClockType.second)
return unixTimeToStdTime(core.stdc.time.time(null));
else
{
import core.sys.linux.time : CLOCK_REALTIME_COARSE;
import core.sys.posix.time : clock_gettime, CLOCK_REALTIME;
static if (clockType == ClockType.coarse) alias clockArg = CLOCK_REALTIME_COARSE;
else static if (clockType == ClockType.normal) alias clockArg = CLOCK_REALTIME;
else static if (clockType == ClockType.precise) alias clockArg = CLOCK_REALTIME;
else static assert(0, "Previous static if is wrong.");
timespec ts = void;
immutable error = clock_gettime(clockArg, &ts);
// Posix clock_gettime called with a valid address and valid clock_id is only
// permitted to fail if the number of seconds does not fit in time_t. If tv_sec
// is long or larger overflow won't happen before 292 billion years A.D.
static if (ts.tv_sec.max < long.max)
{
if (error)
throw new TimeException("Call to clock_gettime() failed");
}
return convert!("seconds", "hnsecs")(ts.tv_sec) +
ts.tv_nsec / 100 +
hnsecsToUnixEpoch;
}
}
else version (FreeBSD)
{
import core.sys.freebsd.time : clock_gettime, CLOCK_REALTIME,
CLOCK_REALTIME_FAST, CLOCK_REALTIME_PRECISE, CLOCK_SECOND;
static if (clockType == ClockType.coarse) alias clockArg = CLOCK_REALTIME_FAST;
else static if (clockType == ClockType.normal) alias clockArg = CLOCK_REALTIME;
else static if (clockType == ClockType.precise) alias clockArg = CLOCK_REALTIME_PRECISE;
else static if (clockType == ClockType.second) alias clockArg = CLOCK_SECOND;
else static assert(0, "Previous static if is wrong.");
timespec ts = void;
immutable error = clock_gettime(clockArg, &ts);
// Posix clock_gettime called with a valid address and valid clock_id is only
// permitted to fail if the number of seconds does not fit in time_t. If tv_sec
// is long or larger overflow won't happen before 292 billion years A.D.
static if (ts.tv_sec.max < long.max)
{
if (error)
throw new TimeException("Call to clock_gettime() failed");
}
return convert!("seconds", "hnsecs")(ts.tv_sec) +
ts.tv_nsec / 100 +
hnsecsToUnixEpoch;
}
else version (NetBSD)
{
static if (clockType == ClockType.second)
return unixTimeToStdTime(core.stdc.time.time(null));
else
{
import core.sys.netbsd.time : clock_gettime, CLOCK_REALTIME;
timespec ts = void;
immutable error = clock_gettime(CLOCK_REALTIME, &ts);
// Posix clock_gettime called with a valid address and valid clock_id is only
// permitted to fail if the number of seconds does not fit in time_t. If tv_sec
// is long or larger overflow won't happen before 292 billion years A.D.
static if (ts.tv_sec.max < long.max)
{
if (error)
throw new TimeException("Call to clock_gettime() failed");
}
return convert!("seconds", "hnsecs")(ts.tv_sec) +
ts.tv_nsec / 100 +
hnsecsToUnixEpoch;
}
}
else version (OpenBSD)
{
static if (clockType == ClockType.second)
return unixTimeToStdTime(core.stdc.time.time(null));
else
{
import core.sys.openbsd.time : clock_gettime, CLOCK_REALTIME;
static if (clockType == ClockType.coarse) alias clockArg = CLOCK_REALTIME;
else static if (clockType == ClockType.normal) alias clockArg = CLOCK_REALTIME;
else static if (clockType == ClockType.precise) alias clockArg = CLOCK_REALTIME;
else static assert(0, "Previous static if is wrong.");
timespec ts;
if (clock_gettime(clockArg, &ts) != 0)
throw new TimeException("Call to clock_gettime() failed");
return convert!("seconds", "hnsecs")(ts.tv_sec) +
ts.tv_nsec / 100 +
hnsecsToUnixEpoch;
}
}
else version (DragonFlyBSD)
{
import core.sys.dragonflybsd.time : clock_gettime, CLOCK_REALTIME,
CLOCK_REALTIME_FAST, CLOCK_REALTIME_PRECISE, CLOCK_SECOND;
static if (clockType == ClockType.coarse) alias clockArg = CLOCK_REALTIME_FAST;
else static if (clockType == ClockType.normal) alias clockArg = CLOCK_REALTIME;
else static if (clockType == ClockType.precise) alias clockArg = CLOCK_REALTIME_PRECISE;
else static if (clockType == ClockType.second) alias clockArg = CLOCK_SECOND;
else static assert(0, "Previous static if is wrong.");
timespec ts = void;
immutable error = clock_gettime(clockArg, &ts);
// Posix clock_gettime called with a valid address and valid clock_id is only
// permitted to fail if the number of seconds does not fit in time_t. If tv_sec
// is long or larger overflow won't happen before 292 billion years A.D.
static if (ts.tv_sec.max < long.max)
{
if (error)
throw new TimeException("Call to clock_gettime() failed");
}
return convert!("seconds", "hnsecs")(ts.tv_sec) +
ts.tv_nsec / 100 +
hnsecsToUnixEpoch;
}
else version (Solaris)
{
static if (clockType == ClockType.second)
return unixTimeToStdTime(core.stdc.time.time(null));
else
{
import core.sys.solaris.time : clock_gettime, CLOCK_REALTIME;
static if (clockType == ClockType.coarse) alias clockArg = CLOCK_REALTIME;
else static if (clockType == ClockType.normal) alias clockArg = CLOCK_REALTIME;
else static if (clockType == ClockType.precise) alias clockArg = CLOCK_REALTIME;
else static assert(0, "Previous static if is wrong.");
timespec ts = void;
immutable error = clock_gettime(clockArg, &ts);
// Posix clock_gettime called with a valid address and valid clock_id is only
// permitted to fail if the number of seconds does not fit in time_t. If tv_sec
// is long or larger overflow won't happen before 292 billion years A.D.
static if (ts.tv_sec.max < long.max)
{
if (error)
throw new TimeException("Call to clock_gettime() failed");
}
return convert!("seconds", "hnsecs")(ts.tv_sec) +
ts.tv_nsec / 100 +
hnsecsToUnixEpoch;
}
}
else version (Hurd)
{
static if (clockType == ClockType.second)
return unixTimeToStdTime(core.stdc.time.time(null));
else
{
import core.sys.hurd.time : CLOCK_REALTIME_COARSE;
import core.sys.posix.time : clock_gettime, CLOCK_REALTIME;
static if (clockType == ClockType.coarse) alias clockArg = CLOCK_REALTIME_COARSE;
else static if (clockType == ClockType.normal) alias clockArg = CLOCK_REALTIME;
else static if (clockType == ClockType.precise) alias clockArg = CLOCK_REALTIME;
else static assert(0, "Previous static if is wrong.");
timespec ts = void;
immutable error = clock_gettime(clockArg, &ts);
// Posix clock_gettime called with a valid address and valid clock_id is only
// permitted to fail if the number of seconds does not fit in time_t. If tv_sec
// is long or larger overflow won't happen before 292 billion years A.D.
static if (ts.tv_sec.max < long.max)
{
if (error)
throw new TimeException("Call to clock_gettime() failed");
}
return convert!("seconds", "hnsecs")(ts.tv_sec) +
ts.tv_nsec / 100 +
hnsecsToUnixEpoch;
}
}
else static assert(0, "Unsupported OS");
}
else static assert(0, "Unsupported OS");
}
@safe unittest
{
import std.format : format;
import std.math.algebraic : abs;
import std.meta : AliasSeq;
enum limit = convert!("seconds", "hnsecs")(2);
auto norm1 = Clock.currStdTime;
auto norm2 = Clock.currStdTime;
assert(norm1 <= norm2, format("%s %s", norm1, norm2));
assert(abs(norm1 - norm2) <= limit);
static foreach (ct; AliasSeq!(ClockType.coarse, ClockType.precise, ClockType.second))
{{
static if (clockSupported(ct))
{
auto value1 = Clock.currStdTime!ct;
auto value2 = Clock.currStdTime!ct;
assert(value1 <= value2, format("%s %s (ClockType: %s)", value1, value2, ct));
assert(abs(value1 - value2) <= limit);
}
}}
}
private:
@disable this();
}
/// Get the current time as a $(LREF SysTime)
@safe unittest
{
import std.datetime.timezone : LocalTime;
SysTime today = Clock.currTime();
assert(today.timezone is LocalTime());
}
/++
`SysTime` is the type used to get the current time from the
system or doing anything that involves time zones. Unlike
$(REF DateTime,std,datetime,date), the time zone is an integral part of
`SysTime` (though for local time applications, time zones can be ignored
and it will work, since it defaults to using the local time zone). It holds
its internal time in std time (hnsecs since midnight, January 1st, 1 A.D.
UTC), so it interfaces well with the system time.
An $(I hnsec) (hecto-nanosecond) is 100 nanoseconds. There are 10,000,000 hnsecs in a second.
$(PANEL
Unlike $(REF_SHORT DateTime,std,datetime,date), `SysTime` is not optimized for
calendar-based operations, and getting individual units from it such as
years or days is going to involve conversions and be less efficient.
For calendar-based operations that don't
care about time zones, then $(REF_SHORT DateTime,std,datetime,date) would be
the type to use. For system time, use `SysTime`.
)
$(P
Casting a `SysTime` to one of the following types will perform a conversion:
)
* $(REF Date,std,datetime,date)
* $(REF_SHORT DateTime,std,datetime,date)
* $(REF_SHORT TimeOfDay,std,datetime,date)
$(P
To convert a
$(REF_SHORT Date,std,datetime,date) or $(REF_SHORT DateTime,std,datetime,date) to a
`SysTime`, use `SysTime`'s constructor, and pass in the intended time
zone with it (or don't pass in a $(REF TimeZone,std,datetime,timezone), and
the local time zone will be used). Be aware, however, that converting from a
$(REF_SHORT DateTime,std,datetime,date) to a `SysTime` will not necessarily
be 100% accurate due to DST (one hour of the year doesn't exist and another
occurs twice). To not risk any conversion errors, keep times as
`SysTime`s. Aside from DST though, there shouldn't be any conversion
problems.
)
$(PANEL
For using time zones other than local time or UTC, use
$(REF PosixTimeZone,std,datetime,timezone) on Posix systems (or on Windows,
if providing the TZ Database files), and use
$(REF WindowsTimeZone,std,datetime,timezone) on Windows systems. The time in
`SysTime` is kept internally in hnsecs from midnight, January 1st, 1 A.D.
UTC. Conversion error cannot happen when changing the time zone of a
`SysTime`. $(REF LocalTime,std,datetime,timezone) is the
$(REF_SHORT TimeZone,std,datetime,timezone) class which represents the local time,
and `UTC` is the $(REF_SHORT TimeZone,std,datetime,timezone) class which
represents UTC. `SysTime` uses $(REF_SHORT LocalTime,std,datetime,timezone) if
no $(REF_SHORT TimeZone,std,datetime,timezone) is provided. For more details on
time zones, see the documentation for $(REF_SHORT TimeZone,std,datetime,timezone),
$(REF_SHORT PosixTimeZone,std,datetime,timezone), and
$(REF_SHORT WindowsTimeZone,std,datetime,timezone).
)
$(P
`SysTime`'s range is from approximately 29,000 B.C. to approximately
29,000 A.D.
)
See_Also:
$(RELATIVE_LINK2 .Clock.currTime, `Clock.currTime`) will return the current time as a `SysTime`.
+/
struct SysTime
{
import core.stdc.time : tm;
version (Posix) import core.sys.posix.sys.time : timeval;
import std.typecons : Rebindable;
public:
/++
Params:
dateTime = The $(REF DateTime,std,datetime,date) to use to set
this $(LREF SysTime)'s internal std time. As
$(REF DateTime,std,datetime,date) has no concept of
time zone, tz is used as its time zone.
tz = The $(REF TimeZone,std,datetime,timezone) to use for this
$(LREF SysTime). If null,
$(REF LocalTime,std,datetime,timezone) will be used. The
given $(REF DateTime,std,datetime,date) is assumed to
be in the given time zone.
+/
this(DateTime dateTime, return scope immutable TimeZone tz = null) return scope @safe nothrow
{
try
this(dateTime, Duration.zero, tz);
catch (Exception e)
assert(0, "SysTime's constructor threw when it shouldn't have.");
}
@safe unittest
{
static void test(DateTime dt, immutable TimeZone tz, long expected)
{
auto sysTime = SysTime(dt, tz);
assert(sysTime._stdTime == expected);
assert(sysTime._timezone is (tz is null ? LocalTime() : tz), format("Given DateTime: %s", dt));
}
test(DateTime.init, UTC(), 0);
test(DateTime(1, 1, 1, 12, 30, 33), UTC(), 450_330_000_000L);
test(DateTime(0, 12, 31, 12, 30, 33), UTC(), -413_670_000_000L);
test(DateTime(1, 1, 1, 0, 0, 0), UTC(), 0);
test(DateTime(1, 1, 1, 0, 0, 1), UTC(), 10_000_000L);
test(DateTime(0, 12, 31, 23, 59, 59), UTC(), -10_000_000L);
test(DateTime(1, 1, 1, 0, 0, 0), new immutable SimpleTimeZone(dur!"minutes"(-60)), 36_000_000_000L);
test(DateTime(1, 1, 1, 0, 0, 0), new immutable SimpleTimeZone(Duration.zero), 0);
test(DateTime(1, 1, 1, 0, 0, 0), new immutable SimpleTimeZone(dur!"minutes"(60)), -36_000_000_000L);
static void testScope(scope ref DateTime dt) @safe
{
auto st = SysTime(dt);
}
}
/++
Params:
dateTime = The $(REF DateTime,std,datetime,date) to use to set
this $(LREF SysTime)'s internal std time. As
$(REF DateTime,std,datetime,date) has no concept of
time zone, tz is used as its time zone.
fracSecs = The fractional seconds portion of the time.
tz = The $(REF TimeZone,std,datetime,timezone) to use for this
$(LREF SysTime). If null,
$(REF LocalTime,std,datetime,timezone) will be used. The
given $(REF DateTime,std,datetime,date) is assumed to
be in the given time zone.
Throws:
$(REF DateTimeException,std,datetime,date) if `fracSecs` is negative or if it's
greater than or equal to one second.
+/
this(DateTime dateTime, Duration fracSecs, return scope immutable TimeZone tz = null) return scope @safe
{
enforce(fracSecs >= Duration.zero, new DateTimeException("A SysTime cannot have negative fractional seconds."));
enforce(fracSecs < seconds(1), new DateTimeException("Fractional seconds must be less than one second."));
auto nonNullTZ = tz is null ? LocalTime() : tz;
immutable dateDiff = dateTime.date - Date.init;
immutable todDiff = dateTime.timeOfDay - TimeOfDay.init;
immutable adjustedTime = dateDiff + todDiff + fracSecs;
immutable standardTime = nonNullTZ.tzToUTC(adjustedTime.total!"hnsecs");
this(standardTime, nonNullTZ);
}
@safe unittest
{
import core.time;
static void test(DateTime dt, Duration fracSecs, immutable TimeZone tz, long expected)
{
auto sysTime = SysTime(dt, fracSecs, tz);
assert(sysTime._stdTime == expected);
assert(sysTime._timezone is (tz is null ? LocalTime() : tz),
format("Given DateTime: %s, Given Duration: %s", dt, fracSecs));
}
test(DateTime.init, Duration.zero, UTC(), 0);
test(DateTime(1, 1, 1, 12, 30, 33), Duration.zero, UTC(), 450_330_000_000L);
test(DateTime(0, 12, 31, 12, 30, 33), Duration.zero, UTC(), -413_670_000_000L);
test(DateTime(1, 1, 1, 0, 0, 0), msecs(1), UTC(), 10_000L);
test(DateTime(0, 12, 31, 23, 59, 59), msecs(999), UTC(), -10_000L);
test(DateTime(0, 12, 31, 23, 59, 59), hnsecs(9_999_999), UTC(), -1);
test(DateTime(0, 12, 31, 23, 59, 59), hnsecs(1), UTC(), -9_999_999);
test(DateTime(0, 12, 31, 23, 59, 59), Duration.zero, UTC(), -10_000_000);
assertThrown!DateTimeException(SysTime(DateTime.init, hnsecs(-1), UTC()));
assertThrown!DateTimeException(SysTime(DateTime.init, seconds(1), UTC()));
static void testScope(scope ref DateTime dt, scope ref Duration d) @safe
{
auto st = SysTime(dt, d);
}
}
/++
Params:
date = The $(REF Date,std,datetime,date) to use to set this
$(LREF SysTime)'s internal std time. As
$(REF Date,std,datetime,date) has no concept of time zone, tz
is used as its time zone.
tz = The $(REF TimeZone,std,datetime,timezone) to use for this
$(LREF SysTime). If null,
$(REF LocalTime,std,datetime,timezone) will be used. The
given $(REF Date,std,datetime,date) is assumed to be in the
given time zone.
+/
this(Date date, return scope immutable TimeZone tz = null) return scope @safe nothrow
{
_timezone = tz is null ? LocalTime() : tz;
try
{
immutable adjustedTime = (date - Date(1, 1, 1)).total!"hnsecs";
immutable standardTime = _timezone.tzToUTC(adjustedTime);
this(standardTime, _timezone);
}
catch (Exception e)
assert(0, "Date's constructor through when it shouldn't have.");
}
@safe unittest
{
static void test(Date d, immutable TimeZone tz, long expected)
{
auto sysTime = SysTime(d, tz);
assert(sysTime._stdTime == expected);
assert(sysTime._timezone is (tz is null ? LocalTime() : tz), format("Given Date: %s", d));
}
test(Date.init, UTC(), 0);
test(Date(1, 1, 1), UTC(), 0);
test(Date(1, 1, 2), UTC(), 864000000000);
test(Date(0, 12, 31), UTC(), -864000000000);
static void testScope(scope ref Date d) @safe
{
auto st = SysTime(d);
}
}
/++
Note:
Whereas the other constructors take in the given date/time, assume
that it's in the given time zone, and convert it to hnsecs in UTC
since midnight, January 1st, 1 A.D. UTC - i.e. std time - this
constructor takes a std time, which is specifically already in UTC,
so no conversion takes place. Of course, the various getter
properties and functions will use the given time zone's conversion
function to convert the results to that time zone, but no conversion
of the arguments to this constructor takes place.
Params:
stdTime = The number of hnsecs since midnight, January 1st, 1 A.D.
UTC.
tz = The $(REF TimeZone,std,datetime,timezone) to use for this
$(LREF SysTime). If null,
$(REF LocalTime,std,datetime,timezone) will be used.
+/
this(long stdTime, return scope immutable TimeZone tz = null) return scope @safe pure nothrow
{
_stdTime = stdTime;
_timezone = tz is null ? LocalTime() : tz;
}
@safe unittest
{
static void test(long stdTime, immutable TimeZone tz)
{
auto sysTime = SysTime(stdTime, tz);
assert(sysTime._stdTime == stdTime);
assert(sysTime._timezone is (tz is null ? LocalTime() : tz), format("Given stdTime: %s", stdTime));
}
foreach (stdTime; [-1234567890L, -250, 0, 250, 1235657390L])
{
foreach (tz; testTZs)
test(stdTime, tz);
}
}
/++
Params:
rhs = The $(LREF SysTime) to assign to this one.
Returns: The `this` of this `SysTime`.
+/
ref SysTime opAssign()(auto ref const(SysTime) rhs) scope return @safe pure nothrow
{
_stdTime = rhs._stdTime;
_timezone = rhs._timezone;
return this;
}
@safe unittest
{
SysTime st;
st = SysTime(DateTime(2012, 12, 21, 1, 2, 3), UTC());
assert(st == SysTime(DateTime(2012, 12, 21, 1, 2, 3), UTC()));
const other = SysTime(DateTime(19, 1, 7, 13, 14, 15), LocalTime());
st = other;
assert(st == other);
version (none) // https://issues.dlang.org/show_bug.cgi?id=21175
static void testScope(scope ref SysTime left, const scope SysTime right) @safe
{
left = right;
}
}
/++
Checks for equality between this $(LREF SysTime) and the given
$(LREF SysTime).
Note that the time zone is ignored. Only the internal
std times (which are in UTC) are compared.
+/
bool opEquals()(auto ref const(SysTime) rhs) @safe const pure nothrow scope
{
return _stdTime == rhs._stdTime;
}
@safe unittest
{
import std.range : chain;
assert(SysTime(DateTime.init, UTC()) == SysTime(0, UTC()));
assert(SysTime(DateTime.init, UTC()) == SysTime(0));
assert(SysTime(Date.init, UTC()) == SysTime(0));
assert(SysTime(0) == SysTime(0));
static void test(DateTime dt, immutable TimeZone tz1, immutable TimeZone tz2)
{
auto st1 = SysTime(dt);
st1.timezone = tz1;
auto st2 = SysTime(dt);
st2.timezone = tz2;
assert(st1 == st2);
}
foreach (tz1; testTZs)
{
foreach (tz2; testTZs)
{
foreach (dt; chain(testDateTimesBC, testDateTimesAD))
test(dt, tz1, tz2);
}
}
auto st = SysTime(DateTime(1999, 7, 6, 12, 33, 30));
const cst = SysTime(DateTime(1999, 7, 6, 12, 33, 30));
immutable ist = SysTime(DateTime(1999, 7, 6, 12, 33, 30));
assert(st == st);
assert(st == cst);
assert(st == ist);
assert(cst == st);
assert(cst == cst);
assert(cst == ist);
assert(ist == st);
assert(ist == cst);
assert(ist == ist);
static void testScope(scope ref SysTime left, const scope SysTime right) @safe
{
assert(left == right);
assert(right == left);
}
}
/++
Compares this $(LREF SysTime) with the given $(LREF SysTime).
Time zone is irrelevant when comparing $(LREF SysTime)s.
Returns:
$(BOOKTABLE,
$(TR $(TD this < rhs) $(TD < 0))
$(TR $(TD this == rhs) $(TD 0))
$(TR $(TD this > rhs) $(TD > 0))
)
+/
int opCmp()(auto ref const(SysTime) rhs) @safe const pure nothrow scope
{
if (_stdTime < rhs._stdTime)
return -1;
if (_stdTime > rhs._stdTime)
return 1;
return 0;
}
@safe unittest
{
import std.algorithm.iteration : map;
import std.array : array;
import std.range : chain;
assert(SysTime(DateTime.init, UTC()).opCmp(SysTime(0, UTC())) == 0);
assert(SysTime(DateTime.init, UTC()).opCmp(SysTime(0)) == 0);
assert(SysTime(Date.init, UTC()).opCmp(SysTime(0)) == 0);
assert(SysTime(0).opCmp(SysTime(0)) == 0);
static void testEqual(SysTime st, immutable TimeZone tz1, immutable TimeZone tz2)
{
auto st1 = st;
st1.timezone = tz1;
auto st2 = st;
st2.timezone = tz2;
assert(st1.opCmp(st2) == 0);
}
auto sts = array(map!SysTime(chain(testDateTimesBC, testDateTimesAD)));
foreach (st; sts)
{
foreach (tz1; testTZs)
{
foreach (tz2; testTZs)
testEqual(st, tz1, tz2);
}
}
static void testCmp(SysTime st1, immutable TimeZone tz1, SysTime st2, immutable TimeZone tz2)
{
st1.timezone = tz1;
st2.timezone = tz2;
assert(st1.opCmp(st2) < 0);
assert(st2.opCmp(st1) > 0);
}
foreach (si, st1; sts)
{
foreach (st2; sts[si + 1 .. $])
{
foreach (tz1; testTZs)
{
foreach (tz2; testTZs)
testCmp(st1, tz1, st2, tz2);
}
}
}
auto st = SysTime(DateTime(1999, 7, 6, 12, 33, 30));
const cst = SysTime(DateTime(1999, 7, 6, 12, 33, 30));
immutable ist = SysTime(DateTime(1999, 7, 6, 12, 33, 30));
assert(st.opCmp(st) == 0);
assert(st.opCmp(cst) == 0);
assert(st.opCmp(ist) == 0);
assert(cst.opCmp(st) == 0);
assert(cst.opCmp(cst) == 0);
assert(cst.opCmp(ist) == 0);
assert(ist.opCmp(st) == 0);
assert(ist.opCmp(cst) == 0);
assert(ist.opCmp(ist) == 0);
static void testScope(scope ref SysTime left, const scope SysTime right) @safe
{
assert(left < right);
assert(right > left);
}
}
/++
Returns: A hash of the $(LREF SysTime).
+/
size_t toHash() const @nogc pure nothrow @safe scope
{
static if (is(size_t == ulong))
return _stdTime;
else
{
// MurmurHash2
enum ulong m = 0xc6a4a7935bd1e995UL;
enum ulong n = m * 16;
enum uint r = 47;
ulong k = _stdTime;
k *= m;
k ^= k >> r;
k *= m;
ulong h = n;
h ^= k;
h *= m;
return cast(size_t) h;
}
}
@safe unittest
{
assert(SysTime(0).toHash == SysTime(0).toHash);
assert(SysTime(DateTime(2000, 1, 1)).toHash == SysTime(DateTime(2000, 1, 1)).toHash);
assert(SysTime(DateTime(2000, 1, 1)).toHash != SysTime(DateTime(2000, 1, 2)).toHash);
// test that timezones aren't taken into account
assert(SysTime(0, LocalTime()).toHash == SysTime(0, LocalTime()).toHash);
assert(SysTime(0, LocalTime()).toHash == SysTime(0, UTC()).toHash);
assert(SysTime(DateTime(2000, 1, 1), LocalTime()).toHash == SysTime(DateTime(2000, 1, 1), LocalTime()).toHash);
immutable zone = new SimpleTimeZone(dur!"minutes"(60));
assert(SysTime(DateTime(2000, 1, 1, 1), zone).toHash == SysTime(DateTime(2000, 1, 1), UTC()).toHash);
assert(SysTime(DateTime(2000, 1, 1), zone).toHash != SysTime(DateTime(2000, 1, 1), UTC()).toHash);
static void testScope(scope ref SysTime st) @safe
{
auto result = st.toHash();
}
}
/++
Year of the Gregorian Calendar. Positive numbers are A.D. Non-positive
are B.C.
+/
@property short year() @safe const nothrow scope
{
return (cast(Date) this).year;
}
@safe unittest
{
import std.range : chain;
static void test(SysTime sysTime, long expected)
{
assert(sysTime.year == expected, format("Value given: %s", sysTime));
}
test(SysTime(0, UTC()), 1);
test(SysTime(1, UTC()), 1);
test(SysTime(-1, UTC()), 0);
foreach (year; chain(testYearsBC, testYearsAD))
{
foreach (md; testMonthDays)
{
foreach (tod; testTODs)
{
auto dt = DateTime(Date(year, md.month, md.day), tod);
foreach (tz; testTZs)
{
foreach (fs; testFracSecs)
test(SysTime(dt, fs, tz), year);
}
}
}
}