Unix2DOS.nsh

; Taken from http://nsis.sourceforge.net/UNIX_to_DOS_text_file_format_conversion_script

Function unix2dos
    ; strips all CRs
    ; and then converts all LFs into CRLFs
    ; (this is roughly equivalent to "cat file | dos2unix | unix2dos")
    ;
    ; usage:
    ;    Push "infile"
    ;    Push "outfile"
    ;    Call unix2dos
    ;
    ; beware that this function destroys $0 $1 $2

    ClearErrors

    Pop $2
    FileOpen $1 $2 w 

    Pop $2
    FileOpen $0 $2 r

    Push $2 ; save name for deleting

    IfErrors unix2dos_done

    ; $0 = file input (opened for reading)
    ; $1 = file output (opened for writing)

unix2dos_loop:
    ; read a byte (stored in $2)
    FileReadByte $0 $2
    IfErrors unix2dos_done ; EOL
    ; skip CR
    StrCmp $2 13 unix2dos_loop
    ; if LF write an extra CR
    StrCmp $2 10 unix2dos_cr unix2dos_write

unix2dos_cr:
    FileWriteByte $1 13

unix2dos_write:
    ; write byte
    FileWriteByte $1 $2
    ; read next byte
    Goto unix2dos_loop

unix2dos_done:

    ; close files
    FileClose $0
    FileClose $1

    ; delete original
    Pop $0
    Delete $0

FunctionEnd