From: handa <handa@m17n.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: tzz@lifelogs.com, monnier@iro.umontreal.ca, emacs-devel@gnu.org
Subject: Re: idn.el and confusables.txt
Date: Wed, 18 May 2011 14:23:26 +0900 [thread overview]
Message-ID: <tl7wrhooa41.fsf@m17n.org> (raw)
In-Reply-To: <83wrhreukg.fsf@gnu.org> (message from Eli Zaretskii on Sun, 15 May 2011 20:34:55 +0300)
In article <83wrhreukg.fsf@gnu.org>, Eli Zaretskii <eliz@gnu.org> writes:
> Are functions defined by ucs-normalize.el used anywhere?
What do you mean by "anywhere". That file provides a coding
system utf-8-hfs that uses functions in that file. And I
don't know whether a specific coding system is used or not
except for what I use. In addition, I have a plan of using
the facility of normalization to display, for instance, the
sequence 'A' '́' by 'Á' when a font doesn't support OTF GPOS
features.
> > Why did you have to create another table? Was it because
> > get-char-code-property is defiend by Lisp and not efficient
> > to call from C?
> Yes, calling a Lisp function (one that calls `load' at that!) in the
> lowest level of display engine was out of the question.
Why? If that loading is just once, what's the problem? For
automatic composition, we are already doing that.
> But there were several other reasons as well:
> . get-char-code-property returns a property list in which bidi types
> are recorded as symbols, while I needed them as small numeric
> values of a C enumerated type (see bidi_type_t), to fit in a small
> number of bits in `struct glyph'.
> . The data structures manipulated by get-char-code-property include
> complications (e.g., a function in the extra slot) for which I
> could find no documentation, so I couldn't figure out whether it
> would be possible to replace get-char-code-property by a simple
> call to CHAR_TABLE_REF.
> . Even if I could use CHAR_TABLE_REF, the additional call to
> plist-get means more overhead. bidi_get_type, the function which
> needs to look up the bidirectional type of an arbitrary character,
> runs in the innermost loop of the display engine, and is called at
> least once (sometimes more) for every character in the displayed
> portion of the buffer, so it must be very efficient.
> . For bidi-mirrored property, the data in the `mirrored' property
> recorded by uni-mirrored.el is simply inadequate: the value is a
> boolean (albeit in a form of symbols `Y' and `N'). What I needed
> was for each character its mirrored character, if there is one;
> this data was simply not available in uni-mirrored.el. The
> corresponding function bidi_mirror_char is also called for a large
> percentage of displayed characters, and must be efficient.
> It was extremely frustrating to have all that data at my fingertips
> and not be able to use it for the purposes of bidi.c, which at first
> seems like a first-class client of Unicode DB. What I wanted was
> something similar to C ctype macros in simplicity and efficiency, but
> nothing quite like that was available. A char-table comes close, but
> it must be a simple table with numerical values -- and that is what
> bidi.c currently uses, leaving uni-bidi.el unused.
I understand your situation, and it's unfortunate that you
didn't consult me to improve the situation. I think it's
not difficult to write a C code that makes uni-* char-tables
more easily be accessed from C without running Lisp.
As for the value type of symbol vs integer in uni-bidi.el,
it's possible to write a code to expose integer value to
C, and the corresponding symbol to Lisp.
As for the uni-mirrored.el, I think it's ok to change the
value type to what you want (character or nil).
---
Kenichi Handa
handa@m17n.org
next prev parent reply other threads:[~2011-05-18 5:23 UTC|newest]
Thread overview: 182+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-18 19:11 Translation of http status code to text Lennart Borgman
2010-03-22 1:19 ` Juri Linkov
2010-03-22 13:17 ` Ted Zlatanov
2010-03-22 14:01 ` Stefan Monnier
2010-03-22 14:25 ` Ted Zlatanov
2010-03-22 17:06 ` Ted Zlatanov
2010-03-22 17:55 ` Sven Joachim
2010-03-22 19:23 ` Ted Zlatanov
2010-03-22 20:32 ` Sven Joachim
2010-03-22 21:31 ` Ted Zlatanov
2010-03-23 9:55 ` Juri Linkov
2010-03-23 13:08 ` Lennart Borgman
2010-03-23 14:26 ` face for non-ASCII characters (was: Translation of http status code to text) Ted Zlatanov
2010-03-23 16:28 ` Lennart Borgman
2010-03-23 18:18 ` face for non-ASCII characters Ted Zlatanov
2011-04-15 22:41 ` Ted Zlatanov
2011-04-15 23:07 ` Lennart Borgman
2011-04-16 0:51 ` Ted Zlatanov
2011-04-16 9:10 ` Lennart Borgman
2011-04-16 15:05 ` Ted Zlatanov
2011-04-16 15:28 ` Lennart Borgman
2011-04-16 15:42 ` Ted Zlatanov
2011-04-16 15:50 ` Lennart Borgman
2011-04-16 15:57 ` Ted Zlatanov
2011-04-16 16:01 ` Lennart Borgman
2011-04-16 16:13 ` Ted Zlatanov
2011-04-16 16:22 ` Lennart Borgman
2011-04-16 16:27 ` Drew Adams
2011-04-16 16:45 ` Ted Zlatanov
2011-04-16 16:48 ` Lennart Borgman
2011-04-16 16:55 ` Ted Zlatanov
2011-04-16 17:11 ` Lennart Borgman
2011-04-18 15:48 ` Ted Zlatanov
2011-04-18 15:53 ` Lennart Borgman
2011-04-18 16:20 ` Ted Zlatanov
2011-04-18 17:03 ` Lennart Borgman
2011-04-19 13:07 ` Ted Zlatanov
2011-04-19 18:56 ` Lennart Borgman
2011-04-20 14:49 ` Ted Zlatanov
2011-04-20 21:38 ` Lennart Borgman
2011-04-21 17:35 ` Ted Zlatanov
2011-04-21 18:42 ` Lennart Borgman
2011-04-21 19:14 ` Ted Zlatanov
2011-04-21 20:00 ` Lennart Borgman
2011-04-21 20:35 ` Ted Zlatanov
2011-04-21 20:53 ` Lennart Borgman
2011-04-21 21:18 ` Ted Zlatanov
2011-04-22 12:20 ` Lennart Borgman
2011-04-22 12:49 ` Stephen J. Turnbull
2011-04-22 13:23 ` Lennart Borgman
2011-04-23 0:50 ` Richard Stallman
2011-04-23 7:13 ` Lennart Borgman
2011-04-25 17:54 ` Richard Stallman
2011-04-26 18:26 ` Chong Yidong
2011-04-26 19:05 ` Ted Zlatanov
2011-04-26 20:29 ` Chong Yidong
2011-04-27 3:45 ` Ted Zlatanov
2011-04-27 4:42 ` Stephen J. Turnbull
2011-05-02 18:18 ` Ted Zlatanov
2011-05-03 1:50 ` Stephen J. Turnbull
2011-05-03 14:45 ` Ted Zlatanov
2011-05-03 21:21 ` Lennart Borgman
2011-05-04 14:41 ` Stephen J. Turnbull
2011-04-27 12:41 ` Lennart Borgman
2011-04-22 14:20 ` Ted Zlatanov
2011-04-22 17:12 ` Lennart Borgman
2011-04-26 3:14 ` package management proposals for Emacs (was: face for non-ASCII characters) Ted Zlatanov
2011-04-26 8:10 ` Lennart Borgman
2011-04-26 21:46 ` Richard Stallman
2011-04-27 1:19 ` package management proposals for Emacs Stefan Monnier
2011-04-27 3:36 ` Ted Zlatanov
2011-04-27 21:14 ` Richard Stallman
2011-04-26 3:09 ` markchars.el 0.2.0 and idn.el (was: face for non-ASCII characters) Ted Zlatanov
2011-04-26 8:13 ` Lennart Borgman
2011-04-26 15:28 ` idn.el and confusables.txt (was: markchars.el 0.2.0 and idn.el) Ted Zlatanov
2011-05-13 19:42 ` idn.el and confusables.txt Stefan Monnier
2011-05-13 20:19 ` Ted Zlatanov
2011-05-14 8:13 ` Eli Zaretskii
2011-05-14 8:06 ` Eli Zaretskii
2011-05-14 8:56 ` Lennart Borgman
2011-05-14 9:36 ` Eli Zaretskii
2011-05-14 13:40 ` Ted Zlatanov
2011-05-14 14:38 ` Eli Zaretskii
2011-05-14 15:30 ` Ted Zlatanov
2011-05-14 16:42 ` Eli Zaretskii
2011-05-14 17:06 ` Ted Zlatanov
2011-05-14 20:59 ` Eli Zaretskii
2011-05-15 1:22 ` Ted Zlatanov
2011-05-15 5:56 ` Eli Zaretskii
2011-05-15 12:14 ` Ted Zlatanov
2011-05-16 12:38 ` Eli Zaretskii
2011-05-16 18:31 ` Ted Zlatanov
2011-05-17 17:59 ` Eli Zaretskii
2011-05-17 15:32 ` Ted Zlatanov
2011-05-18 18:15 ` Ted Zlatanov
2011-05-14 17:25 ` Stefan Monnier
2011-05-15 13:06 ` Kenichi Handa
2011-05-15 17:34 ` Eli Zaretskii
2011-05-18 5:23 ` handa [this message]
2011-05-18 7:38 ` Eli Zaretskii
2011-05-18 7:59 ` handa
2011-05-18 8:13 ` Eli Zaretskii
2011-06-17 8:15 ` Kenichi Handa
2011-06-17 15:12 ` Eli Zaretskii
2011-06-21 2:07 ` Kenichi Handa
2011-06-21 2:53 ` Eli Zaretskii
2011-06-21 3:29 ` Kenichi Handa
2011-06-21 6:11 ` Eli Zaretskii
2011-06-21 7:22 ` Kenichi Handa
2011-06-21 7:34 ` Eli Zaretskii
2011-06-21 8:02 ` Kenichi Handa
2011-06-21 10:30 ` bidi at startup (was: idn.el and confusables.txt) Eli Zaretskii
2011-06-21 15:12 ` bidi at startup Stefan Monnier
2011-06-21 17:13 ` Eli Zaretskii
2011-06-22 15:32 ` Stefan Monnier
2011-07-07 6:10 ` C interface to Unicode character property char-tables Kenichi Handa
2011-08-06 16:52 ` Using uniprop_table_lookup (was: idn.el and confusables.txt) Eli Zaretskii
2011-08-09 0:55 ` Kenichi Handa
2011-08-09 1:32 ` Using uniprop_table_lookup Stefan Monnier
2011-08-09 4:31 ` Kenichi Handa
2011-08-15 8:57 ` Eli Zaretskii
2011-05-31 10:42 ` uni-confusables 0.1 is on the Emacs ELPA branch (was: idn.el and confusables.txt) Ted Zlatanov
2011-06-08 10:42 ` uni-confusables 0.1 is on the Emacs ELPA branch Ted Zlatanov
2011-06-08 15:22 ` Stefan Monnier
2011-04-16 16:00 ` face for non-ASCII characters Drew Adams
2010-03-23 19:40 ` Florian Beck
2010-03-23 14:35 ` Translation of http status code to text Miles Bader
2010-03-23 14:22 ` highlighting non-ASCII characters (was: Translation of http status code to text) Ted Zlatanov
2010-03-23 16:50 ` highlighting non-ASCII characters (was: Translation of http statuscode " Drew Adams
2010-03-23 21:49 ` highlighting non-ASCII characters Stefan Monnier
2010-03-23 21:53 ` Drew Adams
2010-03-24 0:45 ` Stefan Monnier
2010-03-24 1:03 ` Ted Zlatanov
2010-03-24 2:47 ` Stefan Monnier
2010-03-24 4:20 ` Eli Zaretskii
2010-03-24 5:14 ` Jason Rumney
2010-03-24 13:25 ` Stefan Monnier
2010-03-24 15:06 ` Jason Rumney
2010-03-24 19:47 ` Ted Zlatanov
2010-03-24 10:05 ` Ted Zlatanov
2010-03-24 16:21 ` Lennart Borgman
2010-03-24 19:34 ` Lennart Borgman
2010-03-26 17:35 ` Ted Zlatanov
2010-03-26 20:43 ` Ted Zlatanov
2010-03-26 22:50 ` Lennart Borgman
2010-03-29 18:38 ` Ted Zlatanov
2010-03-29 18:48 ` Drew Adams
2010-03-29 20:20 ` Stefan Monnier
2010-03-29 20:19 ` Stefan Monnier
2010-03-29 20:51 ` Lennart Borgman
2010-03-30 13:22 ` Ted Zlatanov
2010-03-29 21:05 ` Ted Zlatanov
2010-03-29 21:31 ` Lennart Borgman
2010-03-29 21:32 ` Drew Adams
2010-03-30 13:15 ` Ted Zlatanov
2010-03-30 14:04 ` Drew Adams
2010-03-30 14:17 ` Lennart Borgman
2010-03-30 14:42 ` Ted Zlatanov
2010-03-30 16:18 ` Juri Linkov
2010-03-30 1:45 ` Stefan Monnier
2010-03-25 7:11 ` Juri Linkov
2010-03-25 14:07 ` Lennart Borgman
2010-03-25 17:32 ` Juri Linkov
2010-03-26 0:32 ` Lennart Borgman
2010-03-26 13:38 ` Stephen Berman
2010-03-26 22:44 ` Lennart Borgman
2010-03-25 7:12 ` Juri Linkov
2010-03-24 2:09 ` Drew Adams
2010-03-24 5:00 ` Stephen J. Turnbull
2010-03-24 9:28 ` Juri Linkov
2010-03-24 13:15 ` Ted Zlatanov
2010-03-24 9:27 ` Juri Linkov
2010-03-22 18:41 ` Translation of http status code to text Stefan Monnier
2010-03-22 19:15 ` Ted Zlatanov
2010-03-23 9:54 ` Juri Linkov
2010-03-23 10:54 ` joakim
2010-03-23 15:02 ` Ted Zlatanov
2010-03-24 3:22 ` Stefan Monnier
2010-03-24 17:35 ` Glenn Morris
2010-03-24 19:37 ` Ted Zlatanov
2010-03-25 1:16 ` Ted Zlatanov
2010-03-23 12:57 ` Stefan Monnier
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