StrStr: Difference between revisions
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== Description == | == Description == | ||
== | '''Requires:''' [[LogicLib]]. | ||
<highlight-nsis>; | |||
; | '''Version:''' 2.0. | ||
; | |||
; | This function searches for a substring on a string, and returns itself plus the remaining part of the string on the right of the substring. | ||
== How To Use == | |||
=== Syntax === | |||
<highlight-nsis> | |||
${StrLoc} "ResultVar" "String" "SubString" | |||
</highlight-nsis> | |||
or | |||
<highlight-nsis> | |||
Push "SubString" | |||
Push "String" | |||
Call StrLoc | |||
Pop "ResultVar" | |||
</highlight-nsis> | |||
=== Parameters === | |||
; ResultVar | |||
: Variable where the part on the right and including the ''SubString'' found on ''String'' is returned. If ''SubString'' is not found, an empty value is returned. | |||
; String | |||
: String where to search for ''SubString''. | |||
; SubString | |||
: String to search in ''String''. | |||
=== Example === | |||
<highlight-nsis> | |||
${StrStr} $0 "This is just an example" "just" | |||
;$0 = "just an example" | |||
</highlight-nsis> | |||
== Function Code == | |||
<highlight-nsis> | |||
!define StrStr "!insertmacro StrStr" | |||
!macro StrStr ResultVar String SubString | |||
Push "${SubString}" | |||
Push "${String}" | |||
Call StrStr | |||
Pop "${ResultVar}" | |||
!macroend | |||
Function StrStr | Function StrStr | ||
/*After this point: | |||
------------------------------------------ | |||
Exch $ | $R0 = SubString (input) | ||
$R1 = String (input) | |||
$R2 = SubStringLen (temp) | |||
$R3 = StrLen (temp) | |||
$R4 = StartCharPos (temp) | |||
$R5 = TempStr (temp)*/ | |||
;Get input from user | |||
Exch $R0 | |||
Exch | |||
Exch $R1 | |||
Push $R2 | |||
Push $R3 | Push $R3 | ||
Push $R4 | Push $R4 | ||
Push $R5 | Push $R5 | ||
;Get "String" and "SubString" length | |||
StrLen $R2 $R0 | |||
StrLen $R3 $R1 | StrLen $R3 $R1 | ||
;Start "StartCharPos" counter | |||
StrCpy $R4 0 | StrCpy $R4 0 | ||
; | |||
;Loop until "SubString" is found or "String" reaches its end | |||
${Do} | |||
;Remove everything before and after the searched part ("TempStr") | |||
StrCpy $R5 $R1 $R2 $R4 | |||
;Compare "TempStr" with "SubString" | |||
${IfThen} $R5 == $R0 ${|} ${ExitDo} ${|} | |||
;If not "SubString", this could be "String"'s end | |||
${IfThen} $R4 >= $R3 ${|} ${ExitDo} ${|} | |||
;If not, continue the loop | |||
IntOp $R4 $R4 + 1 | IntOp $R4 $R4 + 1 | ||
${Loop} | |||
StrCpy $R1 | /*After this point: | ||
------------------------------------------ | |||
$R0 = OutVar (output)*/ | |||
;Remove part before "SubString" on "String" (if there has one) | |||
StrCpy $R0 $R1 `` $R4 | |||
;Return output to user | |||
Pop $R5 | Pop $R5 | ||
Pop $R4 | Pop $R4 | ||
Pop $R3 | Pop $R3 | ||
Pop $R2 | Pop $R2 | ||
Exch $ | Pop $R1 | ||
Exch $R0 | |||
FunctionEnd | FunctionEnd | ||
</highlight-nsis> | </highlight-nsis> | ||
== Credits == | |||
Version 2.0 - Diego Pedroso ([[User:deguix|deguix]]). | |||
Version 1.0 - Ximon Eighteen ([[User:sunjammer|sunjammer]]). | |||
[[Category:String Functions]] | [[Category:String Functions]] |
Revision as of 21:16, 2 July 2005
Author: deguix (talk, contrib) |
Description
Requires: LogicLib.
Version: 2.0.
This function searches for a substring on a string, and returns itself plus the remaining part of the string on the right of the substring.
How To Use
Syntax
${StrLoc} "ResultVar" "String" "SubString"
or
Push "SubString" Push "String" Call StrLoc Pop "ResultVar"
Parameters
- ResultVar
- Variable where the part on the right and including the SubString found on String is returned. If SubString is not found, an empty value is returned.
- String
- String where to search for SubString.
- SubString
- String to search in String.
Example
${StrStr} $0 "This is just an example" "just" ;$0 = "just an example"
Function Code
!define StrStr "!insertmacro StrStr" !macro StrStr ResultVar String SubString Push "${SubString}" Push "${String}" Call StrStr Pop "${ResultVar}" !macroend Function StrStr /*After this point: ------------------------------------------ $R0 = SubString (input) $R1 = String (input) $R2 = SubStringLen (temp) $R3 = StrLen (temp) $R4 = StartCharPos (temp) $R5 = TempStr (temp)*/ ;Get input from user Exch $R0 Exch Exch $R1 Push $R2 Push $R3 Push $R4 Push $R5 ;Get "String" and "SubString" length StrLen $R2 $R0 StrLen $R3 $R1 ;Start "StartCharPos" counter StrCpy $R4 0 ;Loop until "SubString" is found or "String" reaches its end ${Do} ;Remove everything before and after the searched part ("TempStr") StrCpy $R5 $R1 $R2 $R4 ;Compare "TempStr" with "SubString" ${IfThen} $R5 == $R0 ${|} ${ExitDo} ${|} ;If not "SubString", this could be "String"'s end ${IfThen} $R4 >= $R3 ${|} ${ExitDo} ${|} ;If not, continue the loop IntOp $R4 $R4 + 1 ${Loop} /*After this point: ------------------------------------------ $R0 = OutVar (output)*/ ;Remove part before "SubString" on "String" (if there has one) StrCpy $R0 $R1 `` $R4 ;Return output to user Pop $R5 Pop $R4 Pop $R3 Pop $R2 Pop $R1 Exch $R0 FunctionEnd
Credits
Version 2.0 - Diego Pedroso (deguix). Version 1.0 - Ximon Eighteen (sunjammer).