Check for a Registry Key: Difference between revisions
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{{PageAuthor|Vytautas}} | |||
== Description == | == 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. | 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. | : Fixed another typo. | ||
'''[UPDATE: 2003-11-14]''' | |||
: Fixed a typo in latest version. | : Fixed a typo in latest version. | ||
'''[UPDATE: 2003-11-12]''' | |||
: Added Indexed labels to the macro to enable easier modification if needed. | : Added Indexed labels to the macro to enable easier modification if needed. | ||
| Line 17: | Line 17: | ||
;$R0 contains 0 (not present) or 1 (present) | ;$R0 contains 0 (not present) or 1 (present) | ||
</highlight-nsis> | </highlight-nsis> | ||
== The Macro w/ LogicLib == | |||
<highlight-nsis>!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</highlight-nsis> | |||
== The Macro == | == The Macro == | ||
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Vytautas | Vytautas | ||
[[Category:INI, CSV & Registry Functions]] | |||
Latest revision as of 18:05, 24 November 2009
| 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
