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From: Emiliano <emiliano@example.invalid>
Newsgroups: comp.lang.tcl
Subject: Re: 2GB limitation
Date: Mon, 22 Jul 2024 21:58:03 -0300
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On Mon, 22 Jul 2024 17:17:21 -0000 (UTC)
Rich <rich@example.invalid> wrote:

> Andreas Leitgeb <avl@logic.at> wrote:
> > alexandru <alexandru.dadalau@meshparts.de> wrote:
> >> Will there be a fix for the 2GB size limit that a string representation
> >> have in Tcl?
> >> Maybe already fixed in Tcl 9.0?
> > 
> > Yes, that's one of the reasons for switching to tcl9 as soon as
> > possible.
> 
> What is the new larger "limit" in Tcl9?

In 9.0 the type of the 'length' member of the Tcl_Obj struct (the number of
bytes at '*bytes' member, not including the terminating null) has changed
from int to ptrdiff_t, so it will remain (1<<31)-1 => 2147483647 bytes on
32 bit platforms (unsurprisingly) and (1<<63)-1 => 9223372036854775807
(9,22 exabyte) on 64 bit platforms.

IIUC that's also the (new) number of elements for a Tcl list. In practice
the number will be less, since the length of the string representation of
such list will hit the '*bytes' max length first.

-- 
Emiliano