Len of path limit for FileSize() [Resolved]

[Kwai chang caine]

Hello at all,

I don't understand why, but among 8 millions of elements in an USB hard disk, i have several lines who return -1, then that the file or folder exist
When i paste the full path in windows explorer that works, i see the file/folder and SileSize() return -1
I have try with v5.73 and 6.02, and also on another machine it's the same thing
Furthermore the files and folders is read acces, it's the reason why i ask to me if there are a limit in the len of path

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File$ = "e:\A\A\B\A\O\Workspaces_Complets\workspacetizen du 180418\tizen-studio\tools\jsa\jalangi\node_modules\jalangi\node_modules\rewriting-proxy\node_modules\jsdom\node_modules\htmlparser2\node_modules\domutils\node_modules\dom-serializer\node_modules\domelementtype\"
Debug FileSize(File$)
Debug Len(File$)

-1
261

And if i try this code

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File$ = "e:\A\A\B\A\O\Workspaces_Complets\workspacetizen du 180418\tizen-studio\tools\jsa\jalangi\node_modules\jalangi\node_modules\rewriting-proxy\node_modules\jsdom\node_modules\htmlparser2\node_modules\domutils\node_modules\dom-serializer\node_modules\domelementtype\"
Debug OpenFile(0,File$)
Debug GetFileSize_(FileID(0),0)
CloseFile(0)

The debugger return 0 and i have an IMA on the "GetFileSize_()" line

Someone have an idea why that not works ?
Have a good day

[SPH]

Bin, la longueur du chemin; je crois, est de 255 (voir même 25x ou 24x...)
En tout cas, j'ai toujours eu ça en tête !

ps : j'ai les même valeurs que toi dans le débug

[Psychophanta]

When i paste the full path in windows explorer that works, i see the file/folder and FileSize() return -1

My bet is the file library of PB does not allow so long path. Then the file or folder is not found.

[Kiffi]

Bin, la longueur du chemin; je crois, est de 255 (voir même 25x ou 24x...)
En tout cas, j'ai toujours eu ça en tête !

ps : j'ai les même valeurs que toi dans le débug

@SPH: This is an English-language forum.

Well, the path length, I believe, is 255 (or even 25x or 24x...).
Anyway, I've always had that in mind!

ps: I have the same values as you in the debug.

[boddhi]

Salut @KCC

It depends on which Windows version too.
Remember this post

Bonnes fêtes

[Kwai chang caine]

Thanks at all for your answer

@SPH
Hello visitor of my PC
It's normal you have the same answer because i suppose you have not create all the tree structure in your machine
Remark, it's surely easy to create her, with the API

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SHCreateDirectory_(#Null, File$)

Yes i have thinking to this 255 number, but it's strange this time, because usually it's Windows who not works, not PB

My bet is the file library of PB does not allow so long path

You have surely right
But it's perhaps the time to try to enlarge this number no ?
Because if you watch better, my personal path is very small, only 55 characters

A\A\B\A\O\Workspaces_Complets\workspacetizen du 180418\

all the rest, everything else is a TIZEN software, and i can't do anythhing against that
And it's when even a pity to have a library who can't do all that Windows accept

It depends on which Windows version too.

Hello
This time it's not Windows the problem, because i can access to the file/folder with him
You believe the PB function can accept more long path if the WINDOWS change ?
The more strange it's even the API not works, perhaps FRED use this API for FileSize()

@Thanks at all for your precious advice
Have a good end of year

[Psychophanta]

@Kwai chang caine,
as a workaround, if i had your problem, I would create a letter like U:, V:, etc. as an alias for a path, or part of a path.

[Kwai chang caine]

It's a good idea, but in this case i don't believe it's posssible

Because i scan the full hard disk, so i begin to the path (More short you dead) "E:\" and in the middle of the 8 millions files/folder scan, i found this and others monstruous path
It's not my fault, if several softwares have some path of folders too much long

And again, i replace all my personals folders names, to only one letter "E:\A\B\A\A\etc..." for not have this style of problem, and it's not always easy each days for find a file but apparently it's not enough
My wife say to me : "The day you die, I'll just have to throw away the hard drive in the trash !!"
When i use comparator software like Beyound compare, never he say to me "The line is too long"
In fact only Windows say that to me usually, not PB

[AZJIO]

Source of information
FindFirstFile

By default, the name is limited to MAX_PATH characters. To extend this limit to 32,767 wide characters, prepend "\\?\" to the path. For more information, see Naming Files, Paths, and Namespaces.

Source of information

If path lengths > 260 chars, prefix path with "\\?\" - return paths are not affected

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File$ = "\\?\e:\A\A\B\A\O\Workspaces

Source of information
FindFirstFile / FindFirstFileW

There is a default string size limit for paths of MAX_PATH characters. This limit is related to how the FindFirstFile function parses paths. An application can transcend this limit and send in paths longer than MAX_PATH characters by calling the wide (W) version of FindFirstFile and prepending "\\?\" to the path. The "\\?\" tells the function to turn off path parsing; it lets paths longer than MAX_PATH be used with FindFirstFileW. However, each component in the path cannot be more than MAX_PATH characters long. This also works with UNC names. The "\\?\" is ignored as part of the path. For example, "\\?\C:\myworld\private" is seen as "C:\myworld\private", and "\\?\UNC\bill_g_1\hotstuff\coolapps" is seen as "\\bill_g_1\hotstuff\coolapps".

[ChrisR]

This time it's not Windows the problem, because i can access to the file/folder with him
You believe the PB function can accept more long path if the WINDOWS change ?
The more strange it's even the API not works, perhaps FRED use this API for FileSize()

https://learn.microsoft.com/en-us/windo ... s=registry
Or with automatic translation: https://learn.microsoft.com/fr-fr/windo ... s=registry

Enable Long Paths in Windows 10, Version 1607, and Later
Starting in Windows 10, version 1607, MAX_PATH limitations have been removed from common Win32 file and directory functions. However, you must opt-in to the new behavior.

To enable the new long path behavior, both of the following conditions must be met:

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[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem]
"LongPathsEnabled"=dword:00000001

The application manifest must also include the longPathAware element.

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<application xmlns="urn:schemas-microsoft-com:asm.v3">
    <windowsSettings xmlns:ws2="http://schemas.microsoft.com/SMI/2016/WindowsSettings">
        <ws2:longPathAware>true</ws2:longPathAware>
    </windowsSettings>
</application>

It shouldn't be a problem for you to change the LongPathsEnabled registry value with your magic fingers but waits until the champagne bubbles are gone
To change the manifest you can use Update Manifest in Executable or ResourceHacker.

[AZJIO]

Check on a long file path

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EnableExplicit
#FILE_ATTRIBUTE_ALL = #FILE_ATTRIBUTE_ARCHIVE | #FILE_ATTRIBUTE_ENCRYPTED | #FILE_ATTRIBUTE_HIDDEN | #FILE_ATTRIBUTE_NORMAL | #FILE_ATTRIBUTE_OFFLINE | #FILE_ATTRIBUTE_READONLY | #FILE_ATTRIBUTE_SYSTEM | #FILE_ATTRIBUTE_TEMPORARY

Procedure GetFileSize(File$)
	Protected hFile, Size = -1
	hFile = CreateFile_("\\?\" + File$, 0, 0, 0, #OPEN_EXISTING, #FILE_ATTRIBUTE_ALL, #NUL)
	If hFile <> #INVALID_HANDLE_VALUE And GetFileType_(hFile) = #FILE_TYPE_DISK
		Size = GetFileSize_(hFile, 0)
		CloseHandle_(hFile)
	EndIf
	ProcedureReturn Size
EndProcedure

Debug GetFileSize("C:\1.bmp")

[Kwai chang caine]

Whaooouuuhhh !!!


AZJIO and ChrisR !!!!!
You are like two Christmas angels on his cloud, who come down from heaven, to perform a miracle at little KCC who is all alone in pain

Honestly, I thought there was no solution, and yours ....works.
One thousand of thanks at you two

Thanks a lot too, AZJIO for your miracle code, come to heaven

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EnableExplicit
#FILE_ATTRIBUTE_ALL = #FILE_ATTRIBUTE_ARCHIVE | #FILE_ATTRIBUTE_ENCRYPTED | #FILE_ATTRIBUTE_HIDDEN | #FILE_ATTRIBUTE_NORMAL | #FILE_ATTRIBUTE_OFFLINE | #FILE_ATTRIBUTE_READONLY | #FILE_ATTRIBUTE_SYSTEM | #FILE_ATTRIBUTE_TEMPORARY

Procedure GetFileSize(File$)
	Protected hFile, Size = -1
	hFile = CreateFile_("\\?\" + File$, 0, 0, 0, #OPEN_EXISTING, #FILE_ATTRIBUTE_ALL, #NUL)
	If hFile <> #INVALID_HANDLE_VALUE And GetFileType_(hFile) = #FILE_TYPE_DISK
		Size = GetFileSize_(hFile, 0)
		CloseHandle_(hFile)
	EndIf
	ProcedureReturn Size
EndProcedure

Debug GetFileSize("f:\A\A\B\A\O\Workspaces_Complets\workspacetizen du 180418\tizen-studio\tools\jsa\jalangi\node_modules\jalangi\node_modules\rewriting-proxy\node_modules\jsdom\node_modules\htmlparser2\node_modules\domutils\node_modules\dom-serializer\node_modules\domelementtype\LICENSE")

1260

I love you two !!!

And make to you a big SMACK for your great present
And i wish to you, the best good year of all the goods years of the world

On the other hand, i have try for a folder, and that not works
After searching, i found this API who works, but it's perhaps not the best in my case

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Debug GetFileAttributes_("\\?\f:\A\A\B\A\O\Workspaces_Complets\workspacetizen du 180418\tizen-studio\tools\jsa\jalangi\node_modules\jalangi\node_modules\rewriting-proxy\node_modules\jsdom\node_modules\htmlparser2\node_modules\domutils\node_modules\dom-serializer\node_modules\domelementtype")

This code return -1 if the folder not exist, and i don't know Why, but the return of debugger is 8208
I believed it's perhaps #FILE_ATTRIBUTE_DIRECTORY, but no, because #FILE_ATTRIBUTE_DIRECTORY = 16

[firace]

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Debug GetFileAttributes_("\\?\f:\A\A\B\A\O\Workspaces_Complets\workspacetizen du 180418\tizen-studio\tools\jsa\jalangi\node_modules\jalangi\node_modules\rewriting-proxy\node_modules\jsdom\node_modules\htmlparser2\node_modules\domutils\node_modules\dom-serializer\node_modules\domelementtype")

This code return -1 if the folder not exist, and i don't know Why, but the return of debugger is 8208
I believed it's perhaps #FILE_ATTRIBUTE_DIRECTORY, but no, because #FILE_ATTRIBUTE_DIRECTORY = 16

Hi KCC,
8208 is a combination of 2 attributes:
#FILE_ATTRIBUTE_NOT_CONTENT_INDEXED (8192) + #FILE_ATTRIBUTE_DIRECTORY (16)

See attribute values here:
https://learn.microsoft.com/en-us/windo ... -constants

Happy New Year!

[Kwai chang caine]

Hello FIRACE
Thanks a lot for your usefull answer, i know why i have this value now

Your answer reminds me of another question
How do you know the combination of constants, when you have the value ?
You tried all the possibilities or you knew the answer

[firace]

Hello FIRACE
Thanks a lot for your usefull answer, i know why i have this value now

Your answer reminds me of another question
How do you know the combination of constants, when you have the value ?
You tried all the possibilities or you knew the answer

The values are hex flags, so one quick way to find what the attributes are is to convert 8208 to hex:

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 debug hex(8208)  ;; =>  2010  

2010 = 2000 + 10





(A better, more accurate way would be to AND 8208 with each possible flag)