From: Paul Eggert <eggert@cs.ucla.edu>
To: Dmitry Antipov <antipov@mvista.com>
Cc: emacs-devel@gnu.org
Subject: Re: immediate strings #2
Date: Wed, 30 Nov 2011 01:35:05 -0800 [thread overview]
Message-ID: <4ED5F8C9.7060703@cs.ucla.edu> (raw)
In-Reply-To: <4ED5C0FD.8030301@yandex.ru>
On 11/29/11 21:37, Dmitry Antipov wrote:
> It looks like I miss the point. For an immediate strings, we need
> two extra bits - 1 for GC, 1 for string subtype, so the question is
> simple: where to get them if both size and size_byte are ptrdiff_t?
You can get 1 bit from 'size' since it's always nonnegative.
You can get the other bit from 'size_byte' if you change it
so that it's always nonnegative. This can be done by using
0 rather than -1 as its special value indicating that it
is unibyte and the actual byte size is given in 'size'.
next prev parent reply other threads:[~2011-11-30 9:35 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-28 9:11 immediate strings #2 Dmitry Antipov
2011-11-28 17:33 ` Stefan Monnier
2011-11-28 19:48 ` Ken Raeburn
2011-11-28 20:10 ` Andreas Schwab
2011-11-28 21:54 ` Stefan Monnier
2011-11-28 22:25 ` Andreas Schwab
2011-11-29 0:57 ` Ken Raeburn
2011-11-29 8:44 ` Andreas Schwab
2011-11-29 15:48 ` Ken Raeburn
2011-11-29 16:08 ` Andreas Schwab
2011-11-30 16:43 ` Ken Raeburn
2011-11-28 22:18 ` Paul Eggert
2011-11-29 2:07 ` Stefan Monnier
2011-11-29 3:37 ` Dmitry Antipov
2011-11-29 8:50 ` Paul Eggert
2011-11-30 5:37 ` Dmitry Antipov
2011-11-30 9:35 ` Paul Eggert [this message]
2011-11-30 16:43 ` Ken Raeburn
2011-11-30 21:44 ` Paul Eggert
2011-11-29 3:17 ` Dmitry Antipov
2011-11-29 5:29 ` Dmitry Antipov
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