StrStr
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Author: deguix (talk, contrib) |
Description
Version: 2.0.1.
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
${StrStr} "ResultVar" "String" "SubString"
or
Push "String" Push "SubString" Call StrStr 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" ;$0 = "just an example"
Function Code (requires LogicLib header file)
!define StrStr "!insertmacro StrStr" !macro StrStr ResultVar String SubString Push `${String}` Push `${SubString}` Call StrStr Pop `${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 = ResultVar (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 $R0 FunctionEnd
Function Code (does not require LogicLib header file)
!define StrStr "!insertmacro StrStr" !macro StrStr ResultVar String SubString Push `${String}` Push `${SubString}` Call StrStr Pop `${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 loop: ;Remove everything before and after the searched part ("TempStr") StrCpy $R5 $R1 $R2 $R4 ;Compare "TempStr" with "SubString" StrCmp $R5 $R0 done ;If not "SubString", this could be "String"'s end IntCmp $R4 $R3 done 0 done ;If not, continue the loop IntOp $R4 $R4 + 1 Goto loop done: /*After this point: ------------------------------------------ $R0 = ResultVar (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
Versions History
- 2.0.1
- Added support for Unicode strings (not tested by the author).
Credits
Version 2.x - Diego Pedroso (deguix).
Version 1.x - mgentry / Amir Szekely (kichik) / Ximon Eighteen (sunjammer) / Diego Pedroso (deguix).