; Creates Desktop Shortcut(s) if 
; checked on Finish Page

Function CreateDesktopShortCuts

SetOutPath "$INSTDIR"

CreateShortcut "$Desktop\$(sm_shortcut).lnk" "$INSTDIR\USdx.exe"

FunctionEnd

; Deletes only empty dirs which are
; at the top of the stack.

Function un.DeleteIfEmpty
  FindFirst $R0 $R1 "$0\*.*"
  strcmp $R1 "." 0 NoDelete
   FindNext $R0 $R1
   strcmp $R1 ".." 0 NoDelete
    ClearErrors
    FindNext $R0 $R1
    IfErrors 0 NoDelete
     FindClose $R0
     Sleep 1000
     RMDir "$0"
  NoDelete:
   FindClose $R0
FunctionEnd

; This is used to write a
; string to config.ini

Function WriteToConfig
 Exch $0
 Exch
 Exch $1
 
  FileOpen $0 $0 a
   FileSeek $0 0 END
   FileWrite $0 $1
  FileClose $0
 
 Pop $1
 Pop $0
FunctionEnd
 
!macro WriteToConfig String File
 Push "${String}"
 Push "${File}"
  Call WriteToConfig
!macroend
!define WriteToConfig "!insertmacro WriteToConfig"

; Finds UltraStar Deluxe process
;

!define nsProcess::FindProcess `!insertmacro nsProcess::FindProcess`

!macro nsProcess::FindProcess _FILE _ERR
	nsProcess::_FindProcess /NOUNLOAD `${_FILE}`
	Pop ${_ERR}
!macroend


!define nsProcess::KillProcess `!insertmacro nsProcess::KillProcess`

!macro nsProcess::KillProcess _FILE _ERR
	nsProcess::_KillProcess /NOUNLOAD `${_FILE}`
	Pop ${_ERR}
!macroend


!define nsProcess::Unload `!insertmacro nsProcess::Unload`

!macro nsProcess::Unload
	nsProcess::_Unload
!macroend

Function OnCheckbox
	GetDlgItem $R0 $HWNDPARENT 1
	Pop $0 # HWND
	${NSD_GetState} $0 $1
	IntCmp $1 1 _Next _Close
		_Next:
		SendMessage $R0 ${WM_SETTEXT} 0 "STR:$(button_next)"
		goto _done
		_Close:
		SendMessage $R0 ${WM_SETTEXT} 0 "STR:$(button_close)"
	_done:
FunctionEnd

Function VersionCompare
	!define VersionCompare `!insertmacro VersionCompareCall`
 
	!macro VersionCompareCall _VER1 _VER2 _RESULT
		Push `${_VER1}`
		Push `${_VER2}`
		Call VersionCompare
		Pop ${_RESULT}
	!macroend
 
	Exch $1
	Exch
	Exch $0
	Exch
	Push $2
	Push $3
	Push $4
	Push $5
	Push $6
	Push $7
 
	begin:
	StrCpy $2 -1
	IntOp $2 $2 + 1
	StrCpy $3 $0 1 $2
	StrCmp $3 '' +2
	StrCmp $3 '.' 0 -3
	StrCpy $4 $0 $2
	IntOp $2 $2 + 1
	StrCpy $0 $0 '' $2
 
	StrCpy $2 -1
	IntOp $2 $2 + 1
	StrCpy $3 $1 1 $2
	StrCmp $3 '' +2
	StrCmp $3 '.' 0 -3
	StrCpy $5 $1 $2
	IntOp $2 $2 + 1
	StrCpy $1 $1 '' $2
 
	StrCmp $4$5 '' equal
 
	StrCpy $6 -1
	IntOp $6 $6 + 1
	StrCpy $3 $4 1 $6
	StrCmp $3 '0' -2
	StrCmp $3 '' 0 +2
	StrCpy $4 0
 
	StrCpy $7 -1
	IntOp $7 $7 + 1
	StrCpy $3 $5 1 $7
	StrCmp $3 '0' -2
	StrCmp $3 '' 0 +2
	StrCpy $5 0
 
	StrCmp $4 0 0 +2
	StrCmp $5 0 begin newer2
	StrCmp $5 0 newer1
	IntCmp $6 $7 0 newer1 newer2
 
	StrCpy $4 '1$4'
	StrCpy $5 '1$5'
	IntCmp $4 $5 begin newer2 newer1
 
	equal:
	StrCpy $0 0
	goto end
	newer1:
	StrCpy $0 1
	goto end
	newer2:
	StrCpy $0 2
 
	end:
	Pop $7
	Pop $6
	Pop $5
	Pop $4
	Pop $3
	Pop $2
	Pop $1
	Exch $0
FunctionEnd

Function ReadFileLine
Exch $0 ;file
Exch
Exch $1 ;line number
Push $2
Push $3
 
  FileOpen $2 $0 r
 StrCpy $3 0
 
Loop:
 IntOp $3 $3 + 1
  ClearErrors
  FileRead $2 $0
  IfErrors +2
 StrCmp $3 $1 0 loop
  FileClose $2
 
Pop $3
Pop $2
Pop $1
Exch $0
FunctionEnd