StrStr: Difference between revisions
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== Description == | == Description == | ||
'''Version:''' 2.0.1. | |||
'''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. | 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. | ||
Line 14: | Line 12: | ||
<highlight-nsis> | <highlight-nsis> | ||
${ | ${StrStr} "ResultVar" "String" "SubString" | ||
</highlight-nsis> | </highlight-nsis> | ||
or | or | ||
<highlight-nsis> | <highlight-nsis> | ||
Push "String" | |||
Push "SubString" | Push "SubString" | ||
Call StrStr | |||
Call | |||
Pop "ResultVar" | Pop "ResultVar" | ||
</highlight-nsis> | </highlight-nsis> | ||
Line 42: | Line 40: | ||
</highlight-nsis> | </highlight-nsis> | ||
== Function Code == | == Function Code (requires [[LogicLib header file]]) == | ||
<highlight-nsis> | <highlight-nsis> | ||
Line 48: | Line 46: | ||
!macro StrStr ResultVar String SubString | !macro StrStr ResultVar String SubString | ||
Push | Push `${String}` | ||
Push | Push `${SubString}` | ||
Call StrStr | Call StrStr | ||
Pop | Pop `${ResultVar}` | ||
!macroend | !macroend | ||
Line 94: | Line 92: | ||
/*After this point: | /*After this point: | ||
------------------------------------------ | ------------------------------------------ | ||
$R0 = | $R0 = ResultVar (output)*/ | ||
;Remove part before "SubString" on "String" (if there has one) | ;Remove part before "SubString" on "String" (if there has one) | ||
Line 108: | Line 106: | ||
FunctionEnd | FunctionEnd | ||
</highlight-nsis> | </highlight-nsis> | ||
== Function Code (does not require [[LogicLib header file]]) == | |||
<highlight-nsis> | |||
!define StrStr "!insertmacro StrStr" | |||
!macro StrStr ResultVar String SubString | |||
Push `${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 | |||
</highlight-nsis> | |||
== Versions History == | |||
;2.0.1 | |||
:Added support for Unicode strings (not tested by the author). | |||
== Credits == | == Credits == | ||
Version 2. | Version 2.x - Diego Pedroso ([[User:deguix|deguix]]).<br> | ||
Version 1. | Version 1.x - [[User:mgentry|mgentry]] / Amir Szekely ([[User:kichik|kichik]]) / Ximon Eighteen ([[User:sunjammer|sunjammer]]) / Diego Pedroso ([[User:deguix|deguix]]). | ||
[[Category:String Functions]] | [[Category:String Functions]] |
Latest revision as of 06:23, 3 December 2005
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).