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From: "Stephen J. Turnbull" <stephen@xemacs.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: Camm Maguire <camm@maguirefamily.org>,
	gcl-devel@gnu.org, emacs-devel@gnu.org
Subject: Re: utf8 and emacs text/string multibyte representation
Date: Sat, 01 Nov 2014 10:16:50 +0900	[thread overview]
Message-ID: <87a94b3ekd.fsf@uwakimon.sk.tsukuba.ac.jp> (raw)
In-Reply-To: <83wq7hzf9t.fsf@gnu.org>

Eli Zaretskii writes:

 > There's no character data type in Emacs.  (XEmacs does have it.)

IIRC Ken'ichi has been thinking about adding a character type to
Emacs.  But that would be a big change.  It was worth it for XEmacs,
but I doubt it would be worth it for Emacs any more.  If GCL has a
character type already, that should not change.

Regarding "boxing", in XEmacs currently we have two tag bits at the
low end of a word, bit patterns ending in ...1 are integers (x >> 1
gives the value), bit patterns ending in ...10 are characters (x >> 2
give ord(c)), and bit patterns ending in ...00 are pointers to lrecord
types.  So yes, we always return a boxed character, but the
representation fits in a single word, and is not a pointer.








  parent reply	other threads:[~2014-11-01  1:16 UTC|newest]

Thread overview: 136+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-10-28 22:33 Referring to revisions in the git future Alan Mackenzie
2014-10-28 22:54 ` Óscar Fuentes
2014-10-28 23:05   ` Alan Mackenzie
2014-10-28 23:24     ` Óscar Fuentes
2014-10-31 22:47     ` Paul Eggert
2014-10-29  0:49 ` Eric S. Raymond
2014-10-29  3:38   ` Stephen J. Turnbull
2014-10-29 12:26     ` Stefan Monnier
2014-10-29 12:41       ` Alexander Baier
2014-10-29 14:52   ` Barry Warsaw
2014-10-29 15:01     ` David Kastrup
2014-10-29 15:06       ` Eric S. Raymond
2014-10-29 18:12         ` Barry Warsaw
2014-10-29 22:09           ` Lars Magne Ingebrigtsen
2014-10-29 22:29             ` Eric S. Raymond
2014-10-29 23:31               ` Paul Eggert
2014-10-30  0:01                 ` Nic Ferrier
2014-10-30  1:53                 ` Stefan Monnier
2014-10-30  2:10                   ` Eric S. Raymond
2014-10-30  2:13                     ` Paul Eggert
2014-10-30  2:48                       ` Eric S. Raymond
2014-10-30  2:25                     ` Glenn Morris
2014-10-30 10:10                       ` David Kastrup
2014-10-30 13:03                         ` Stefan Monnier
2014-10-30 13:40                           ` David Kastrup
2014-10-30 14:00                             ` Stefan Monnier
2014-10-30 13:02                     ` Stefan Monnier
2014-10-30 15:12                       ` Eric S. Raymond
2014-10-30 16:49                         ` Stefan Monnier
2014-10-30  6:46                 ` Jan Djärv
2014-10-30  7:36                   ` Ivan Shmakov
2014-10-30  8:09                     ` Jan Djärv
2014-10-30  8:31                     ` Eric S. Raymond
2014-10-30  9:53                       ` Andreas Schwab
2014-10-30 10:13                         ` Eric S. Raymond
2014-10-30 10:32                           ` Andreas Schwab
2014-10-30 11:13                             ` Nicolas Richard
2014-10-30 10:12                       ` David Kastrup
2014-10-30 13:29                       ` Stefan Monnier
2014-10-30 15:33                         ` DVCS design philosophy Eric S. Raymond
2014-10-30 16:59                           ` Stefan Monnier
2014-10-30 17:41                             ` Eric S. Raymond
2014-10-31 20:18                         ` Referring to revisions in the git future Nicolas Richard
2014-10-31 21:11                           ` Stefan Monnier
2014-11-01  1:44                             ` Stephen J. Turnbull
2014-11-01  7:58                             ` David Kastrup
2014-10-30 14:20                       ` Barry Warsaw
2014-11-01  1:23                         ` Stephen J. Turnbull
2014-10-30 15:52                     ` Eli Zaretskii
2014-10-30  3:32           ` Stephen J. Turnbull
2014-10-30  4:35             ` Barry Warsaw
2014-10-30  5:24               ` Stephen J. Turnbull
2014-10-30 10:17               ` David Kastrup
2014-10-30 13:42               ` Alex Bennée
2014-10-30 13:19             ` Stefan Monnier
2014-10-31  6:36               ` Stephen J. Turnbull
2014-10-31 19:42               ` David Kastrup
2014-11-01  1:34                 ` Stephen J. Turnbull
2014-11-01  7:05                   ` Tassilo Horn
2014-11-01  7:09                     ` Dima Kogan
2014-11-01  7:28                     ` Paul Eggert
2014-11-01  7:49                     ` David Kastrup
2014-11-01  9:46                       ` Alan Mackenzie
2014-11-01 10:13                         ` Eli Zaretskii
2014-11-01 11:33                           ` Alan Mackenzie
2014-11-01 13:06                             ` Eli Zaretskii
2014-11-01 13:21                               ` Alan Mackenzie
2014-11-01 10:29                         ` David Kastrup
2014-11-01 11:29                           ` Alan Mackenzie
2014-11-01 11:57                             ` David Kastrup
2014-11-01 12:29                               ` Alan Mackenzie
2014-11-01 12:47                                 ` Ivan Shmakov
2014-11-01 13:46                                   ` Alan Mackenzie
2014-11-01 18:58                                     ` Stephen J. Turnbull
2014-11-01 12:49                                 ` David Kastrup
2014-10-29  1:11 ` Stefan Monnier
2014-10-29  6:06   ` Werner LEMBERG
2014-10-29  9:01     ` David Kastrup
2014-10-29  8:50 ` David Kastrup
2014-10-29  9:52   ` Eric S. Raymond
2014-10-29 11:00     ` David Kastrup
2014-10-29 14:32       ` Eli Zaretskii
2014-10-29 14:35         ` David Kastrup
2014-10-29 14:55           ` Eli Zaretskii
2014-10-30  4:44             ` Richard Stallman
2014-10-30  8:32               ` Eric S. Raymond
2014-10-30 10:25                 ` David Kastrup
2014-10-30 11:51                   ` Eric S. Raymond
2014-10-30 12:14                     ` David Kastrup
2014-10-30 15:01                       ` Eric S. Raymond
2014-10-30 15:53                 ` Eli Zaretskii
2014-10-30 15:56                   ` Eric S. Raymond
2014-10-30 16:44                     ` Eli Zaretskii
2014-10-31  7:47                 ` Richard Stallman
2014-10-31  8:17                   ` Eli Zaretskii
2014-10-31 10:21                   ` Eric S. Raymond
2014-10-29 12:35     ` Stefan Monnier
2014-10-29 13:00       ` Jose E. Marchesi
2014-10-29 13:59         ` Stefan Monnier
2014-10-29 14:39           ` Eric S. Raymond
2014-10-29 14:46             ` Rasmus
2014-10-29 14:52               ` Eric S. Raymond
2014-10-30  0:58               ` Rob Browning
2014-10-29 15:27             ` Stefan Monnier
2014-10-29 14:04         ` utf8 and emacs text/string multibyte representation Camm Maguire
2014-10-29 14:51           ` Eli Zaretskii
2014-10-29 15:55             ` Camm Maguire
2014-10-29 16:19               ` Eli Zaretskii
2014-10-30 14:13                 ` Camm Maguire
2014-10-30 16:06                   ` Eli Zaretskii
2014-10-30 16:27                     ` Camm Maguire
2014-10-30 16:35                       ` Eli Zaretskii
2014-10-31 18:05                         ` Camm Maguire
2014-11-01  9:01                           ` Eli Zaretskii
2014-11-01 18:32                             ` Stephen J. Turnbull
2014-11-01 18:41                               ` David Kastrup
2014-11-01 19:09                                 ` Stephen J. Turnbull
2014-11-02  0:56                                 ` Stefan Monnier
2014-11-01  1:16                         ` Stephen J. Turnbull [this message]
2014-10-29 16:45             ` Stefan Monnier
2014-10-29 15:56           ` Raymond Toy
2014-10-30 14:16             ` Camm Maguire
2014-10-31 18:47               ` Sam Steingold
2014-10-31 21:00                 ` Andreas Schwab
2014-10-31 19:52               ` [Gcl-devel] " Stefan Monnier
2014-10-30  3:08           ` Stephen J. Turnbull
2014-10-29 13:26       ` Referring to revisions in the git future Eric S. Raymond
2014-10-29 14:04         ` Stefan Monnier
2014-10-29 14:49           ` Eric S. Raymond
2014-10-30  2:43           ` Stephen J. Turnbull
2014-10-29 13:08     ` Jan Djärv
2014-10-29 13:27       ` Eric S. Raymond
2014-10-29 13:49         ` Eric S. Raymond
2014-10-29 18:03           ` Jan Djärv
2014-10-29 11:18   ` Alan Mackenzie
2014-10-29 11:37     ` David Kastrup

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