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boomingranny

Trying to read a line from a file that is over 65534 characters, can it be done?

5 posts in this topic

#1 ·  Posted (edited)

Hi,

I am Trying to read a line from a file,

the line contains over 65534 characters.

Can it be done?

when i do the filereadline command it only returns the first 65534. is there anyway round this? other than perhaps using fileread??!

Thanks for taking the time to help me :whistle:

Example:

$test = ""
for $i = 1 to 65600
    $test &= "c"
next
$test &= " the end"
msgbox (0, "string len before write",stringlen($test) & @CRLF & "last 7 char in string:"& stringright($test,7))

FileDelete("C:\boomingrannytest.txt")
$x = fileopen ("c:\boomingrannytest.txt",1)
    FileWriteLine ($x,$test)
FileClose  ($x)
$x = fileopen ("c:\boomingrannytest.txt",0)
    $test = FileReadLine ($x)
FileClose  ($x)

msgbox (0, "string len after write/read",stringlen($test) & @CRLF & "last 7 char in string:"& stringright($test,7))
FileDelete("C:\boomingrannytest.txt")

the weird thing is the filewriteline allows me to write more than 65534 chars (try opening the c:\boomingrannytest.txt file when the string len after write/read message box is up - see the "the end" text is there!), but the filereadline doesn't read more than 65534 :lmao:

Edited by boomingranny

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#2 ·  Posted (edited)

;Create a dummy file with a string length twice what file read line returns
$chrs = 65534 * 2

$string= ""
For $j = 1 to 20

    For $i = 1 to $chrs
        $String &= "a"
    Next
$String &= @CRLF
Next

FileWrite("myfile.txt",$string)

;Read the whole file into a variable
$fileasaWhole = FileRead("myfile.txt")

;Split the file into an array by the @crlf at the end of line
$fileasaarray = StringSplit($fileasaWhole,@CRLF,1)

;loop through each line in the file which is now in an array
For $i = 1 to Ubound($fileasaarray) - 1
    Msgbox(0,"","Line " & $i & " Is " & StringLen($fileasaarray[$i]) & " Charachters long");you can do whatever you want with the data here
Next

This is the bit you really interested in

;Read the whole file into a variable
$fileasaWhole = FileRead("myfile.txt")

;Split the file into an array by the @crlf at the end of line
$fileasaarray = StringSplit($fileasaWhole,@CRLF,1)

;loop through each line in the file which is now in an array
For $i = 1 to Ubound($fileasaarray) - 1
    Msgbox(0,"","Line " & $i & " Is " & StringLen($fileasaarray[$i]) & " Charachters long");you can do whatever you want with the data here
Next
Edited by ChrisL

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#3 ·  Posted (edited)

so im just going to have to load the whole file into an array??

Problem is the file im working with is quite a whopper, hence the huge lines (some 65535+ in length)

Thanks heaps for your speedy reply!

i think there is also a _FileReadToArray which does a similar thing?

Edited by boomingranny

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so im just going to have to load the whole file into an array??

Problem is the file im working with is quite a whopper, hence the huge lines (some 65535+ in length)

Thanks heaps for your speedy reply!

i think there is also a _FileReadToArray which does a similar thing?

Yes there is, it pretty much does the same thing.

Once you have read the whole file in which you'd only need to do once I think your script will be subsiquently much quicker because you just reffer back to the array from then on

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Yes, reading file from memory rather than disk is working out quite well, i just did a quick rewrite of my script (aprox 1300 lines with several functions) and i think its running faster, although its hard to tell...

Thanks again for your help!

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