DumpLog.nsh

######################################################################
# Function to dump the installer details to a file.
#
# Source: https://nsis.sourceforge.io/Dump_log_to_file
######################################################################

!define /IfNDef LVM_GETITEMCOUNT 0x1004
!define /IfNDef LVM_GETITEMTEXTA 0x102D
!define /IfNDef LVM_GETITEMTEXTW 0x1073
!if "${NSIS_CHAR_SIZE}" > 1
!define /IfNDef LVM_GETITEMTEXT ${LVM_GETITEMTEXTW}
!else
!define /IfNDef LVM_GETITEMTEXT ${LVM_GETITEMTEXTA}
!endif
 
Function DumpLog
  Exch $5
  Push $0
  Push $1
  Push $2
  Push $3
  Push $4
  Push $6
  FindWindow $0 "#32770" "" $HWNDPARENT
  GetDlgItem $0 $0 1016
  StrCmp $0 0 exit
  FileOpen $5 $5 "w"
  StrCmp $5 "" exit
    SendMessage $0 ${LVM_GETITEMCOUNT} 0 0 $6
    System::Call '*(&t${NSIS_MAX_STRLEN})p.r3'
    StrCpy $2 0
    System::Call "*(i, i, i, i, i, p, i, i, i) p  (0, 0, 0, 0, 0, r3, ${NSIS_MAX_STRLEN}) .r1"
    loop: StrCmp $2 $6 done
      System::Call "User32::SendMessage(p, i, p, p) p ($0, ${LVM_GETITEMTEXT}, $2, r1)"
      System::Call "*$3(&t${NSIS_MAX_STRLEN} .r4)"
      !ifdef DumpLog_As_UTF16LE
      FileWriteUTF16LE ${DumpLog_As_UTF16LE} $5 "$4$\r$\n"
      !else
      FileWrite $5 "$4$\r$\n" ; Unicode will be translated to ANSI!
      !endif
      IntOp $2 $2 + 1
      Goto loop
    done:
      FileClose $5
      System::Free $1
      System::Free $3
  exit:
    Pop $6
    Pop $4
    Pop $3
    Pop $2
    Pop $1
    Pop $0
    Pop $5
FunctionEnd