break line control

Hi everyone 🙂
ive been experimenting with blank/break line control,
the goal is to parse a file prior to editing to assure consistent spacing between data blocks,
the data blocks are just some text instructions in segments separated by a line break or sometimes two or more,

i want create a unified 2 line break between each block,

i thought a simple search and replace for "$\r$\n" replacing with "$\r$\n$\r$\n"
and than passing again replacing "$\r$\n$\r$\n$\r$\n" with "$\r$\n$\r$\n"
should do the trick; but as i found out i was wrong 🙁

any suggestion how i should go about it?

TIA
Chris

Are you editing in-place or from one file to another?

I would do it in one pass, add if needed and ignore if too many when writing to the other file.

Thank you Anders <3
yes i am appending in place,

im currently having a hard time capturing the pattern of two line breaks,
atm my attempts only add never subtract 🙁

ATB
Chris

I would recommend that you write to a temp file instead, in-place editing is much harder.

Thank you Anders <3


ATB
Chris

even from one file to another still no go 🙁
i can only replace a single line but not two,
as soon as the second line comes to play the it cant be found,
when only capturing a single line; this basically closes all gaps,

any advice?

TIA
Chris

Are you keeping a count of empty lines in your loop? And reset the count when you hit a non-empty line?

i am not; this is my last attempt which delete all spaces,

Section
ClearErrors
FileOpen $0 "test.txt" "r"
GetTempFileName $R0
FileOpen $1 $R0 "w"
loop:
   FileRead $0 $2
   IfErrors done
   StrCmp $2 "$\r$\n" 0 +2
      StrCpy $2 ""
   FileWrite $1 $2
   Goto loop
done:
   FileClose $0
   FileClose $1
   Delete "test.txt"
   CopyFiles /SILENT $R0 "test.txt"
   Delete $R0
SectionEnd 

ATB
Chris

Section
FileOpen $0 "test.txt" "w"
FileWrite $0 "Hello$\r$\n"
FileWrite $0 "World$\r$\n"
FileWrite $0 "$\r$\n"
FileWrite $0 "One$\r$\n"
FileWrite $0 "Two$\r$\n$\r$\n"
FileWrite $0 "333$\r$\n$\r$\n$\r$\n"
FileWrite $0 "EOF$\r$\n"
FileClose $0
ClearErrors
FileOpen $0 "test.txt" "r"
GetTempFileName $R0
FileOpen $1 $R0 "w"
loop:
   FileRead $0 $2
   IfErrors done
   
   ${If} $2 != "$\r$\n"
   ${AndIf} $2 != "$\r"
   ${AndIf} $2 != "$\n"
      FileWrite $1 $2
      FileWrite $1 "$\r$\n"
   ${EndIf}
   Goto loop
done:
   FileClose $0
   FileClose $1
   Delete "test.txt"
   CopyFiles /SILENT $R0 "test.txt"
   Delete $R0
   ExecShellWait "" "test.txt"
   Delete "test.txt"
SectionEnd 

?

Thank you Anders <3

it doesn't seem to like the first loop ${If},
i changed to !If and it moved on to not liking the next ${AndIf}

Edit:
adding !include LogicLib.nsh fixed the stop above,
trying to figure out why its now stopping here ExecShellWait "" "test.txt"

ATB
Chris

YaY \ o / its working

i bow to your expertise Master <3

TIA
Chris

Originally Posted by MyPC8MyBrain View Post

trying to figure out why its now stopping here ExecShellWait "" "test.txt"

This only works in recent NSIS v3.

adding both

!include LogicLib.nsh
!include StdUtils.nsh 

and changing from

   ExecShellWait "" "test.txt" 

to

   StdUtils::ExecShellWait "" "test.txt" 

had your code working fully (custom build based 3.02)

i ended with commenting out last two lines as the last deletes our file and the one before kept giving me error,
something about "this file has no handle" or something,

   #ExecShellWait "" "test.txt" 
   #Delete "test.txt" 

ATB
Chris