Alexandre Julliard pushed to branch master at wine / wine

Commits:

• 04da356a
  by Francis De Brabandere at 2026-05-07T15:32:25-04:00

  vbscript: Implement DateDiff built-in function.
  
  Implement DateDiff(interval, date1, date2 [, firstdayofweek [, firstweekofyear]])
  with support for all interval types: yyyy, q, m, y, d, w, ww, h, n, s.
  
  For yyyy/q/m the difference is computed from calendar fields via VarUdateFromDate.
  For d/y the day number difference is used. For w it is the day difference
  integer-divided by 7 (not affected by firstdayofweek). For ww it counts
  week boundary crossings based on firstdayofweek. For h/n/s the dates are
  converted to the respective unit and truncated before subtracting.
  
  Returns VT_I4 (Long). Null date arguments return Null; null interval or
  null firstdayofweek/firstweekofyear return VBSE_ILLEGAL_NULL_USE.
  

2 changed files:

• dlls/vbscript/global.c
• dlls/vbscript/tests/api.vbs