Get Parameter Value
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Author: zimsms (talk, contrib) |
Description
I created this function so I could define parameters on the command line to use in silent installs, the main push behind it was to define the default language that the installer should use. However, this should prove useful in any purpose where you need to retrieve a command line parameter.
See the syntax examples below; The stack will contain either the hard coded specified default value or the value supplied at the command line.
The Calling Procedure
!insertmacro GetParameterValue "/L=" "1033" pop $R0
Or:
!insertmacro GetParameterValue "/L=" "1033" pop $MYPARAMETERVAR
The Macros
; load language from command line /L=1033 ; foo.exe /S /L=1033 /D=C:\Program Files\Foo ; or: ; foo.exe /S "/L=1033" /D="C:\Program Files\Foo" ; gpv "/L=" "1033" !macro GETPARAMETERVALUE SWITCH DEFAULT Push $0 Push $1 Push $2 Push $3 Push $4 ;$CMDLINE='"My Setup\Setup.exe" /L=1033 /S' Push "$CMDLINE" Push '${SWITCH}"' !insertmacro StrStr Pop $0 StrCmp "$0" "" gpv_notquoted ;$0='/L="1033" /S' StrLen $2 "$0" Strlen $1 "${SWITCH}" IntOp $1 $1 + 1 StrCpy $0 "$0" $2 $1 ;$0='1033" /S' Push "$0" Push '"' !insertmacro StrStr Pop $1 StrLen $2 "$0" StrLen $3 "$1" IntOp $4 $2 - $3 StrCpy $0 $0 $4 0 Goto gpv_done gpv_notquoted: Push "$CMDLINE" Push "${SWITCH}" !insertmacro StrStr Pop $0 StrCmp "$0" "" gpv_done ;$0='/L="1033" /S' StrLen $2 "$0" Strlen $1 "${SWITCH}" StrCpy $0 "$0" $2 $1 ;$0=1033 /S' Push "$0" Push ' ' !insertmacro StrStr Pop $1 StrLen $2 "$0" StrLen $3 "$1" IntOp $4 $2 - $3 StrCpy $0 $0 $4 0 Goto gpv_done gpv_done: StrCmp "$0" "" 0 +2 StrCpy $0 "${DEFAULT}" Pop $4 Pop $3 Pop $2 Pop $1 Exch $0 !macroend ; And I had to modify StrStr a tiny bit. ; Possible upgrade switch the goto's to use ${__LINE__} !macro STRSTR Exch $R1 ; st=haystack,old$R1, $R1=needle Exch ; st=old$R1,haystack Exch $R2 ; st=old$R1,old$R2, $R2=haystack Push $R3 Push $R4 Push $R5 StrLen $R3 $R1 StrCpy $R4 0 ; $R1=needle ; $R2=haystack ; $R3=len(needle) ; $R4=cnt ; $R5=tmp ; loop; StrCpy $R5 $R2 $R3 $R4 StrCmp $R5 $R1 +4 StrCmp $R5 "" +3 IntOp $R4 $R4 + 1 Goto -4 ; done; StrCpy $R1 $R2 "" $R4 Pop $R5 Pop $R4 Pop $R3 Pop $R2 Exch $R1 !macroend