Check for a Registry Key
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Author: Vytautas (talk, contrib) |
Description
Include this macro to check to see if a specified registry key exists. After using this macro the stack contains 0 if the key was not present and 1 if it was.
[UPDATE: 2004-04-07]
- Fixed another typo.
[UPDATE: 2003-11-14]
- Fixed a typo in latest version.
[UPDATE: 2003-11-12]
- Added Indexed labels to the macro to enable easier modification if needed.
Usage
!insertmacro IfKeyExists "ROOT" "KeyToCheckIn" "KeyToCheck" Pop $R0 ;$R0 contains 0 (not present) or 1 (present)
The Macro w/ LogicLib
!include LogicLib.nsh !macro IfKeyExists ROOT MAIN_KEY KEY Push $R0 Push $R1 Push $R2 # XXX bug if ${ROOT}, ${MAIN_KEY} or ${KEY} use $R0 or $R1 StrCpy $R1 "0" # loop index StrCpy $R2 "0" # not found ${Do} EnumRegKey $R0 ${ROOT} "${MAIN_KEY}" "$R1" ${If} $R0 == "${KEY}" StrCpy $R2 "1" # found ${Break} ${EndIf} IntOp $R1 $R1 + 1 ${LoopWhile} $R0 != "" ClearErrors Exch 2 Pop $R0 Pop $R1 Exch $R2 !macroend
The Macro
!macro IfKeyExists ROOT MAIN_KEY KEY push $R0 push $R1 !define Index 'Line${__LINE__}' StrCpy $R1 "0" "${Index}-Loop:" ; Check for Key EnumRegKey $R0 ${ROOT} "${MAIN_KEY}" "$R1" StrCmp $R0 "" "${Index}-False" IntOp $R1 $R1 + 1 StrCmp $R0 "${KEY}" "${Index}-True" "${Index}-Loop" "${Index}-True:" ;Return 1 if found push "1" goto "${Index}-End" "${Index}-False:" ;Return 0 if not found push "0" goto "${Index}-End" "${Index}-End:" !undef Index exch 2 pop $R0 pop $R1 !macroend
This page was created due to this thread.
Vytautas