View source for Search for text in file

{{PageAuthor|Afrow UK}}

== Description ==
This function will search in a file for the specified string, and return some values.

<b>Changes:</b>
13th January 2006 - Added ClearErrors (thanks Jenner Modesto)
13th July 2007 - Re-written.
15th December 2015 - Added functionallity for specific occurance line print

== Usage ==
<highlight-nsis>
Push C:\temp1.txt
Push hello
Push 1 # line should be displayed for occurance number of the searched string, if empty string is passed or 0 the last occurance will be displayed
 Call FileSearch
Pop $2 # the line number the string was found for specified occurance number
Pop $0 #Number of times found throughout
Pop $1 #Number of lines found on
StrCmp $0 0 +2
MessageBox MB_OK "$\"hello$\" string was found in the file $0 times on $1 lines and the first line was $2"
</highlight-nsis>

== The Function ==
<highlight-nsis>
Function FileSearch
Pop $7 ;~~~~Piotrek occurance numberw
Exch $R0 ;search for
Exch
Exch $R1 ;input file
Push $R2
Push $R3
Push $R4
Push $R5
Push $R6
Push $R7
Push $R8
Push $R9


  StrLen $R4 $R0
  StrCpy $R7 0
  StrCpy $R8 0
  ;~~~~Piotrek start
  StrCpy $9 0
  ${If} $7 == ""
	StrCpy $7 0 ; occurence number user specified
  ${EndIf}
  ;~~~~Piotrek end
  ClearErrors
  FileOpen $R2 $R1 r
  IfErrors Done
 
  LoopRead:
    ClearErrors
    FileRead $R2 $R3
    IfErrors DoneRead
	IntOp $9 $9 + 1 ;Piotrek
	
    IntOp $R7 $R7 + 1
    StrCpy $R5 -1
    StrCpy $R9 0
 
    LoopParse:
      IntOp $R5 $R5 + 1
      StrCpy $R6 $R3 $R4 $R5
      StrCmp $R6 "" 0 +4
        StrCmp $R9 1 LoopRead
          IntOp $R7 $R7 - 1
          Goto LoopRead
	
      StrCmp $R6 $R0 0 LoopParse
        StrCpy $R9 1
        IntOp $R8 $R8 + 1
		;~~~~Piotrek start
		${If} $R8 == $7 ;if occurence is specified - outputs a specified occurence if not last occurence is output]
			StrCpy $0 $9
			StrCpy $7 "-1"
		${ElseIf} $7 == 0
			StrCpy $0 $9
		${EndIf}
		;~~~~Piotrek end
        Goto LoopParse
 
  DoneRead:
    FileClose $R2
  Done:
    StrCpy $R0 $R8
    StrCpy $R1 $R7
 
Pop $R9
Pop $R8
Pop $R7
Pop $R6
Pop $R5
Pop $R4
Pop $R3
Pop $R2
Exch $R1 ;number of lines found on
Exch
Exch $R0 ;output count found
Push $0 ;You need to pop that out after function call as first parameter ````Piotrek
FunctionEnd
</highlight-nsis>

Written by me again for using with batch / log files.

Stu

[[Category:Text Files Manipulation Functions]]