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openvpn/install-win32/GetWindowsVersion.nsi

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; Turn off old selected section
; GetWindowsVersion
;
; Based on Yazno's function
; Updated by Joost Verburg
; Updated for Windows 98 SE by Matthew Win Tibbals 5-21-03
; Updated for Vista by Joe Cincotta 12-2-07
;
; Returns on top of stack
;
; Windows Version (95, 98, ME, NT x.x, 2000, XP, 2003, VISTA)
; or
; '' (Unknown Windows Version)
;
; Usage:
; Call GetWindowsVersion
; Pop $R0
; ; at this point $R0 is "NT 4.0" or whatnot
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
Function GetWindowsVersion
Push $R0
Push $R1
ClearErrors
ReadRegStr $R0 HKLM \
"SOFTWARE\Microsoft\Windows NT\CurrentVersion" CurrentVersion
IfErrors 0 lbl_winnt
; we are not NT
ReadRegStr $R0 HKLM \
"SOFTWARE\Microsoft\Windows\CurrentVersion" VersionNumber
StrCpy $R1 $R0 1
StrCmp $R1 '4' 0 lbl_error
StrCpy $R1 $R0 3
StrCmp $R1 '4.0' lbl_win32_95
StrCmp $R1 '4.9' lbl_win32_ME lbl_win32_98
lbl_win32_95:
StrCpy $R0 '95'
Goto lbl_done
lbl_win32_98:
;;beginning of additions to support win 98 SE
push $R0
push "."
call strstr
pop $R0
StrCpy $R0 $R0 "" 1
StrCmp $R0 "10.2222" lbl_win32_98SE
StrCpy $R0 '98' ;;this line was not added
Goto lbl_done ;;this line was not added either
lbl_win32_98SE:
StrCpy $R0 '98 SE'
Goto lbl_done
;;end of additions to support win 98 SE
lbl_win32_ME:
StrCpy $R0 'ME'
Goto lbl_done
lbl_winnt:
StrCpy $R1 $R0 1
StrCmp $R1 '3' lbl_winnt_x
StrCmp $R1 '4' lbl_winnt_x
StrCpy $R1 $R0 3
StrCmp $R1 '5.0' lbl_winnt_2000
StrCmp $R1 '5.1' lbl_winnt_XP
StrCmp $R1 '5.2' lbl_winnt_2003
StrCmp $R1 '6.0' lbl_winnt_VISTA lbl_error
lbl_winnt_x:
StrCpy $R0 "NT $R0" 6
Goto lbl_done
lbl_winnt_2000:
Strcpy $R0 '2000'
Goto lbl_done
lbl_winnt_XP:
Strcpy $R0 'XP'
Goto lbl_done
lbl_winnt_2003:
Strcpy $R0 '2003'
Goto lbl_done
lbl_winnt_VISTA:
Strcpy $R0 'VISTA'
Goto lbl_done
lbl_error:
Strcpy $R0 ''
lbl_done:
Pop $R1
Exch $R0
FunctionEnd
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