Re: Get milliseconds from time and construct time based on milliseconds

[bauss via Digitalmars-d-learn]

On Tuesday, 28 May 2024 at 23:18:46 UTC, Steven Schveighoffer 
wrote:
On Tuesday, 28 May 2024 at 18:41:02 UTC, bauss wrote:
On Tuesday, 28 May 2024 at 18:29:17 UTC, Ferhat Kurtulmuş 
wrote:
On Tuesday, 28 May 2024 at 17:37:42 UTC, bauss wrote:
I have two questions that I can't seem to find a solution to 
after looking at std.datetime.

First question is how do I get the current time but in 
milliseconds?

Second is how do I construct a time ex. systime or datetime 
based on milliseconds?

Thanks

Unixtime might be what you want:

import std;

import std.datetime;
import std.stdio;

    void main() {
        // Get the current time in the UTC time zone
        auto currentTime = Clock.currTime();

        // Convert the time to the Unix epoch 
(1970-01-01T00:00:00Z)
        Duration unixTime = currentTime - 
SysTime(DateTime(1970, 1, 1), UTC());

You can do `SysTime(unixTimeToStdTime(0))` to get a SysTime 
that is at the unix epoch.


Also figured out the second question based on your result.

Simply doing:

```
SysTime(DateTime(1970, 1, 1), UTC()) + 
dur!"msecs"(milliseconds)
```

Seems to work.

Note there is an `msecs` function:

```d
SysTime(unixTimeToStdTime(0)) + milliseconds.msecs;
```

https://dlang.org/phobos/std_datetime_systime.html#unixTimeToStdTime
https://dlang.org/phobos/core_time.html#msecs

-Steve

Thanks! That's a lot cleaner