(02-28-2023, 09:21 AM)mnrvovrfc Wrote: No, unfortunately.

Might have to make them up from C/C++ libraries:

https://linux.die.net/man/3/mktime

Or let's wait what Balderdash has to say about it LOL.

If you need to print dates in human-readable format there is this:

https://staging.qb64phoenix.com/showthread.php?tid=1459

(02-28-2023, 01:04 PM)madscijr Wrote: PS how DO you pronounce mnrvovrfc anyway? 

(02-28-2023, 08:14 AM)madscijr Wrote: Do we have a native date/time type, with all the associated functions (dateadd, datediff, date to UNIX epoch & vice-versa, timezone operations, etc.) or has anyone built an equivalent library in QB64PE or related?

(02-28-2023, 07:50 PM)TerryRitchie Wrote:

(02-28-2023, 08:14 AM)madscijr Wrote: Do we have a native date/time type, with all the associated functions (dateadd, datediff, date to UNIX epoch & vice-versa, timezone operations, etc.) or has anyone built an equivalent library in QB64PE or related?

Back in the early 90's I had to write many of these date functions for a drug testing program I wrote for my local municipality. If I remember correctly most were fairly easy to calculate, except for Easter, which uses a convoluted equation.

With a little Internet research these should be fairly easy to find written in other source code and converted to QB64. I'll add it to my list of libraries to create but won't be able to get to it for some time as I'm working on others right now.

• http://www.cpearson.com/excel/datetime.htm
  
• https://www.ablebits.com/office-addins-blog/excel-date-functions/
  
• https://www.goskills.com/Excel/Resources/Excel-date-functions
  
• https://www.excelfunctions.net/excel-date-and-time-functions.html
  
• https://www.automateexcel.com/vba/date-functions/
  
• https://bettersolutions.com/vba/dates-times/functions.htm
  
• https://support.microsoft.com/en-us/office/date-and-time-functions-reference-fd1b5961-c1ae-4677-be58-074152f97b81
  

• https://www.skypack.dev/blog/2021/02/the-best-javascript-date-libraries/
  
• https://medium.com/javascript-dots/4-best-javascript-date-libraries-f2158fd0b9e7
  
• https://date-fns.org/
  
• https://momentjs.com/
  
• https://moment.github.io/luxon/#/
  

(03-01-2023, 01:56 AM)madscijr Wrote: A number of years back I worked on a big JavaScript library where we needed all kinds of date conversion, formatting, validation, and calculations, and we ended up with close to 50 functions, and there was still tons more to do. The basic functions aren't too hard to roll on your own, it's just that when you consider things like time zones and leap years and business days and so on, the list quickly grows!

(03-01-2023, 02:40 PM)Balderdash Wrote: One could do it with Win32 API but I don't have the code handy right now. This is a good reference if you know what you're doing. If not, I can assist.

SYSTEMTIME (minwinbase.h) - Win32 apps | Microsoft Learn

Simple conversion of the small sample at the bottom of that page:

Code: (Select All)

Option Explicit
$NoPrefix
$Console:Only

Type SYSTEMTIME
    As Unsigned Integer wYear, wMonth, wDayOfWeek
    As Unsigned Integer wDay, wHour, wMinute
    As Unsigned Integer wSecond, wMilliseconds
End Type

Declare CustomType Library
    Sub printf (format As String, Byval arg1 As Unsigned Integer, Byval arg2 As Unsigned Integer)
    Sub GetSystemTime (ByVal lpSystemTime As Offset)
    Sub GetLocalTime (ByVal lpSystemTime As Offset)
End Declare

Dim As SYSTEMTIME st, lt

GetSystemTime (Offset(st))
GetLocalTime (Offset(lt))

printf "The system time is: %02d:%02d" + Chr$(10) + Chr$(0), st.wHour, st.wMinute
printf " The local time is: %02d:%02d" + Chr$(10) + Chr$(0), lt.wHour, lt.wMinute