Re: what's the correct behavior of directory-namestring

It's not that neither is correct. It's worse - *both* are correct, and correctness depends on context in this case.
________________________________
From: Marco Antoniotti <[email protected]>
Sent: Thursday, July 31, 2025 9:33 AM
To: Michał Herda | Keepit <[email protected]>
Cc: Jinsong Zhao <[email protected]>; [email protected] <[email protected]>
Subject: Re: [Sbcl-help] what's the correct behavior of directory-namestring

... which means neither is correct :)

Oh, the joys of pathname munging taking into account ITS and TOPS :)

Cheers

MA


On Wed, Jul 30, 2025 at 10:20 AM Michał Herda | Keepit via Sbcl-help <[email protected]<mailto:[email protected]>> wrote:
Both are correct - the parsing of namestrings is different on Windows and Linux.

Try (DESCRIBE #P"R:/Temp/abc/") on both Windows and Linux to see which pathname slots are populated, and how, on which OS.
________________________________
From: Jinsong Zhao <[email protected]<mailto:[email protected]>>
Sent: Wednesday, July 30, 2025 8:23 AM
To: [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>>
Subject: [Sbcl-help] what's the correct behavior of directory-namestring

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Hi there,

I am using SBCL on Windows. I also have SBCL install on Debian Linux and
FreeBSD.

I have to deal with some pathnames, for example:
#P"R:/Temp/abc/"

When passing the pathname to directory-namestring in SBCL 2.5.7 on
Windows, I got:

* (directory-namestring #P"R:/Temp/abc/")
"/Temp/abc/"

SBCL 2.2.9 on Debian and 2.5.6 on FreeBSD, booth give:

* (directory-namestring #P"R:/Temp/abc/")
"R:/Temp/abc/"

Which is the correct behavior?

Best,
Jinsong



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