VersionCheckNew: Compare version numbers

Author: Afrow UK (talk, contrib)

Description

This was made after this topic where RobGrant found that the old VersionCheck function would fail on version numbers like 6 and 6.0 (it would say 6 is lower than 6.0).

Tested Version Numbers

Current VersionCheck function will compare the following version strings successfully...

• "3.1.0" "3.10.0"
• "0.6" "6"
• "6.0" "6"
• "5.1.1.0" "5.1.1.0"
• "9.1" "9.1.9"
• "1.01" "1.10"
• "2.5.09" "2.5"
• "2.5.9" "2.5.01"
• "7" "10.0.0.3646"
• "1" "11"
• "91.1.1.1" "101.1.1.1"
• "1.001" "1.0"

Usage

${VersionCheckNew} "version 1" "version 2" "$[output variable]"

Example

${VersionCheckNew} "1.0.1" "1.1.0" "$R0"
MessageBox MB_OK "Return value: $R0" ;outputs 2

Output values

Output	Meaning
0	Versions are equal
1	Version 1 is newer
2	Version 2 is newer

The Function (and Macro)

!macro VersionCheckV5 Ver1 Ver2 OutVar
 Push "${Ver1}"
 Push "${Ver2}"
  Call VersionCheckV5
 Pop "${OutVar}"
!macroend
!define VersionCheckV5 "!insertmacro VersionCheckV5"
 
Function VersionCheckV5
 Exch $R0 ; second version number
 Exch
 Exch $R1 ; first version number
 Push $R2
 Push $R3
 Push $R4
 Push $R5 ; second version part
 Push $R6 ; first version part
 
  StrCpy $R1 $R1.
  StrCpy $R0 $R0.
 
 Next: StrCmp $R0$R1 "" 0 +3
  StrCpy $R0 0
  Goto Done
 
  StrCmp $R0 "" 0 +2
   StrCpy $R0 0.
  StrCmp $R1 "" 0 +2
   StrCpy $R1 0.
 
 StrCpy $R2 0
  IntOp $R2 $R2 + 1
  StrCpy $R4 $R1 1 $R2
  StrCmp $R4 . 0 -2
    StrCpy $R6 $R1 $R2
    IntOp $R2 $R2 + 1
    StrCpy $R1 $R1 "" $R2
 
 StrCpy $R2 0
  IntOp $R2 $R2 + 1
  StrCpy $R4 $R0 1 $R2
  StrCmp $R4 . 0 -2
    StrCpy $R5 $R0 $R2
    IntOp $R2 $R2 + 1
    StrCpy $R0 $R0 "" $R2
 
 IntCmp $R5 0 Compare
 IntCmp $R6 0 Compare
 
 StrCpy $R3 0
  StrCpy $R4 $R6 1 $R3
  IntOp $R3 $R3 + 1
  StrCmp $R4 0 -2
 
 StrCpy $R2 0
  StrCpy $R4 $R5 1 $R2
  IntOp $R2 $R2 + 1
  StrCmp $R4 0 -2
 
 IntCmp $R3 $R2 0 +2 +4
 Compare: IntCmp 1$R5 1$R6 Next 0 +3
 
  StrCpy $R0 1
  Goto Done
  StrCpy $R0 2
 
 Done:
 Pop $R6
 Pop $R5
 Pop $R4
 Pop $R3
 Pop $R2
 Pop $R1
 Exch $R0 ; output
FunctionEnd

Version History

• v5: 28 March 05
  • Re-wrote code again after a lot of thinking :p. Was failing for 1 and 11 (would say 1 was bigger than 11!)
  • Changed function name to VersionCheckV5
  • Fixed small bug (thanks Instructor!)

• v4: 22 March 05
  • Check per digit would fail on 10.0 and 7.0 (thanks Daijoubu; it would say 1st was smaller).
    The code has now been replaced with a more advanced method.

• v3: 13 Feb 05
  • Added check per digit per number.
  • Changed function name back to VersionCheckNew.

• v2: 10 Jan 05
  • Re-written whole function.
  • Changed function name to VersionCheckNew2.

• v1: 9 Dec 04
  • First version.

Bug Reports

If you find any problems, please send me a Private Message via the NSIS forums.

-Stu (Afrow UK)