Bug in FileOpen()? - Not!

[mikkokh]

Is there Bug in FileOpen() in AutoIt v3.3.14.2, or have I missed something?

Bellow has simple test script... It keeps running after Input file has ended. No any changes in @error.

$hInputFile = FileOpen("input.txt")
If $hInputFile = -1 Then _
   Exit

While 1
   $sInputData = FileRead($hInputFile)
   $lastError = @error
   Switch $lastError
      Case 1
         consoleWrite("File read failed!" & @CRLF)
         Exit
      Case -1
         ConsoleWrite("Done." & @CRLF)
         ExitLoop
      Case Else
;        ConsoleWrite($sInputData)
         ConsoleWrite($lastError & ", ")
   EndSwitch
WEnd

 

Edited February 1, 2016 by Melba23
Amended title!

[Melba23]

mikkokh,

Of course it keeps running - you get @error = 0, which means the file read was successful. and so your loop never ends.

M23

[mikkokh]

So, how I would to know when file read is EOF?

 

Help file says:

@error: 1 = if file not opened in read mode or other error
-1 = if end-of-file is reached

[Jos]

You want to use FileReadLine()

Jos

[Melba23]

mikkokh,

If @error is 0 then the read was successful - end of story.

I believe you get the -1 @error comes if you opened the file in binary and then asked for a certain number of bytes to be read - if this was not achievable because AutoIt hit an EOF marker (usually 0x00) before that value you get the error.

M23

[mikkokh]

I have used FileRead() to read ASCII data from Input file and send it all via COM port to VFD display.

I think, if I use FileReadLine() for this job, @CR and @CRLR are handled same way, so display does not receive them like it should to do.

I have noticed that when I use @extended to monitor when value is 0, I could stop script after whole file is EOF. I think I should use that way in this case.

Thanks, and sorry that I bothered you both.

Edited February 1, 2016 by mikkokh