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