Re: [Caml-list] Ocaml and Windows' notion of Unicode file names

[Matthieu Dubuget <matthieu.dubuget@gmail.com>]

Le 15/05/2016 18:42, Adrien Nader a écrit :
> There was a thread about this back in february:
>   "Looking for a windows ocaml UTF-16 encoded filename aware library".
>

Hello,

the thread pointed by Adrien lists different solutions. One of them is to write a lightweight unicode-aware library. A cleaner solution is also currently proposed as a pull request against OCaml standard library (https://github.com/ocaml/ocaml/pull/153).

I tried the "small library" solution, which worked pretty well, but in my use-case, it appeared to be extremely slow. I did not yet test a mixed solution, that would switch to unicode versions of the calls, only when the non-unicode one are failing. Nor did I tried yet the pull request #153.

Note that on windows, there are two different problems to address when dealing with paths. The more obvious one is their encoding. But you may also experience problems depending on their length. In this case, the solution is to use
unicode-aware calls, and to specify an extended-length path, using the "\\?\" prefix. For example, "\\?\D:\very long path". I also have to check if this is slower.

Salutations

-- 
Matthieu Dubuget