Lloigor
17th October 2011 21:59 UTC

Time difference between two files - ${FileTimeDiff}
  I thought maybe this can be useful to some.. works great for me.

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;; Get the difference between two file times

>;; P1 :i: File name A.

;;P2 :i: File name B.

;;P3 :o: Number of seconds between the two files, can be negative of positive

>;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

!define FileTimeDiff "!insertmacro _FileTimeDiff"

>!macro _FileTimeDiff _File1_ _File2_ _Diff_

   Push$0  ;; File Search Handle / File Time (UTC) (100 ns unit, 64bit int)

  Push $3  ;; File Info (struct) / File-2 Time (UTC) (Seconds)

  Push $4  ;; File-1 Time (UTC) (Seconds)


  System::Call '*(i, l, l, l, i, i, i, i, &t260, &t14) i .r3'  ;; Create WIN32_FIND_DATA Struct


  !insertmacro ___FileTimeUTCSeconds "${_File1_}"  ;; Get File1 UTC Time in Seconds

   Pop$4

  !insertmacro ___FileTimeUTCSeconds "${_File2_}"  ;; Get File2 UTC Time in Seconds

   Pop$3

   System::Int64Op $4 - $3                          ;; Calculate File Time Difference

   Pop$0


   _ftdexit:

  Pop $4

   Pop$3

   Exch$0

   Pop${_Diff_}

!macroend

>!macro ___FileTimeUTCSeconds _File_

   System::Call 'kernel32::FindFirstFileA(t, i) i("${_File_}", r3) .r0'  ;; Find file info

   IntCmp$0 -1 0 0 +4  ;; if handle <= -1 : not ok

      Push ""

     Pop $0

      Goto _ftdexit    ;; do not even check the other file

>;; Else (valid handle)

     System::Call 'kernel32::FindClose(i) i(r0)'  ;; Close file search


      System::Call '*$3(i, l, l, l, i, i, i, i, &t260, &t14) i (,,, .r0)'  ;; Get File time

      System::Int64Op $0 / 10000000  ;; Conversion From '100 ns' >TO> '1 sec' unit

>!macroend

>; 

ex.: ${FileTimeDiff} "${SAVEDIR}\${FILETOCHECK}" "${BKPDIR}${BKPNUM}\${FILETOCHECK}" $0


Just began nsis scripting about a month ago, so feel free to suggest a better coding for this. ;)
.

T.Slappy
18th October 2011 06:20 UTC

Nice work!
Maybe you could add new parameter where user could choose which times to compare?
Example:
1: ftCreationTime;
2: ftLastAccessTime;
3: ftLastWriteTime;

Do not forget to add this article to wiki! :)

Lloigor
20th October 2011 19:09 UTC

Added. :)
http://nsis.sourceforge.net/FileTimeDiff
Also made it 3-modes.