id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
681	Document 64KB line limit for FileReadLine()	PsaltyDS		"Based on this support topic:  FileReadLine problem read a very big line [http://www.autoitscript.com/forum/index.php?showtopic=84354]

FileReadLine() uses a 64K buffer that will return a longer single line as multiple 64K lines.  For example, 96K line will be read out as a 64K line, then a 32K line.

Jon indicates this is not a bug, so documentation should be updated reflect the limitation.

Demo:  
{{{
Global $sFile = ""test.txt"", $hFile, $n
Global $sLine = ""012345467890""
FileDelete($sFile)

; Create large line
Do
    $sLine &= $sLine
Until Stringlen($sLine) > 2^16
ConsoleWrite(""Actual line length = "" & StringLen($sLine) & @LF)

; Open file
$hFile = FileOpen($sFile, 2) ; Overwrite
For $n = 1 To 10
	; Write 10 lines
    FileWriteLine($hFile,$sLine)
Next
FileClose($hFile)

; Test with FileReadLine()
$n = 1 
While 1
	$sLine = FileReadLine($sFile, $n)
	If @error Then ExitLoop
	ConsoleWrite(""Line "" & $n & "" length = "" & StringLen($sLine) & @LF)
	$n += 1
WEnd
}}}

"	Bug	closed		Documentation	3.2.13.10	None	Duplicate