FileGetShortName result wrong for long filenames

[KaFu]

The result returned by FileGetShortName seem wrong if the path is longer than 260 characters. Only a truncated result (273 characters) is returned, but @error = 0.

Here is a reproducer using WinApiEx.

#include <WinAPIEx.au3>

; REMOVE test files
$sDir_Source = "\\?\" & @ScriptDir & "\_Source"
If MsgBox(4, "", "Press YES to run test" & @CRLF & @CRLF & "Press NO to remove files from previous test") <> 6 Then
	For $i = 51 To 1 Step -1
		$sDir = $sDir_Source
		For $y = 1 To $i
			$sDir &= "\1234567890"
		Next
		ConsoleWrite($i & @TAB & $sDir & "\test.txt" & @CRLF)
		ConsoleWrite("FD: " & _FileDeleteEx($sDir & "\test.txt") & @CRLF)
		$iRes = _DirRemoveEx_Empty($sDir)
		ConsoleWrite(_WinAPI_GetLastErrorMessage() & @CRLF)
		ConsoleWrite("RD: " & FileExists($sDir) & @TAB & $iRes & @CRLF)
	Next
	DirRemove("\\?\" & @ScriptDir & "\_Source")
	Exit
EndIf

; CREATE test files
DirCreate("\\?\" & @ScriptDir & "\_Source")
$sDir = $sDir_Source
For $i = 0 To 50
	$sDir &= "\1234567890"
	_WinAPI_CreateDirectory($sDir)
	_Create_TestFile($sDir & "\")
Next

; PERFORM Test
$sDir = @ScriptDir & "\_Source\"
For $i = 0 To 50
	$sDir &= "1234567890\"
	$sFile = $sDir & 'test.txt'
	ConsoleWrite($i & @TAB & StringLen(FileGetShortName("\\?\" & $sFile)) & @TAB & FileGetShortName("\\?\" & $sFile) & @tab & @error & @CRLF)
	ConsoleWrite($i & @TAB & StringLen(_WinAPI_GetShortPathNameW("\\?\" & $sFile)) & @TAB & _WinAPI_GetShortPathNameW("\\?\" & $sFile) & @CRLF)
	ConsoleWrite("========" & @CRLF)
Next

Func _Create_TestFile($sDir)
	$sFile = $sDir & 'test.txt'
	Local $nBytes
	$sText = StringLen($sFile) & @CRLF & $sFile
	$tBuffer = DllStructCreate("byte[" & StringLen($sText) & "]")
	DllStructSetData($tBuffer, 1, $sText)
	$hFile = _WinAPI_CreateFile($sFile, 1)
	_WinAPI_WriteFile($hFile, DllStructGetPtr($tBuffer), StringLen($sText), $nBytes)
	_WinAPI_CloseHandle($hFile)
EndFunc   ;==>_Create_TestFile

Func _WinAPI_GetShortPathNameW($sPath)
	Local $rc = DllCall("kernel32.dll", "int", "GetShortPathNameW", "wstr", $sPath, "wstr", "", "int", 32768)
	Return $rc[2]
EndFunc   ;==>_WinAPI_GetShortPathNameW

Func _DirRemoveEx_Empty($sPath)
	Local $iRes = DllCall("kernel32.dll", "int", "RemoveDirectoryW", "wstr", $sPath)
	Return $iRes[0]
EndFunc   ;==>_DirRemoveEx_Empty

Func _FileDeleteEx($sFile)
	Local $iRes = DllCall("kernel32.dll", "int", "DeleteFileW", "wstr", $sFile)
	Return $iRes[0]
EndFunc   ;==>_FileDeleteEx

[Jpm]

the repro test can run only under 3.3.9.4 still true in the current next beta