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Re: eight-bit char handling in emacs-unicode
From: |
Kenichi Handa |
Subject: |
Re: eight-bit char handling in emacs-unicode |
Date: |
Thu, 27 Nov 2003 10:34:45 +0900 (JST) |
User-agent: |
SEMI/1.14.3 (Ushinoya) FLIM/1.14.2 (Yagi-Nishiguchi) APEL/10.2 Emacs/21.3 (sparc-sun-solaris2.6) MULE/5.0 (SAKAKI) |
In article <jwvhe0rp6ml.fsf-monnier+emacs/address@hidden>, Stefan Monnier
<address@hidden> writes:
>>> but since the output is a unibyte string,
>>> that restrict it to cases where the code-points can be encoded in 8 bits,
>>> thus it doesn't sound very generic
>> Yes. But I thought generic or not is not a point here.
> Except that if it's not generic (in the sense that it does not behave
> meaningfully in all language environments), then it can't be used in generic
> elisp code, right?
Yes. But, it simply means that insertion of multibyte
string in a unibyte buffer can't be generic.
>> My examples shows that we can't use encode-coding-string.
>> How can we use encode-coding-string without knowing what
>> coding system to use? I haven't heard your answer yet.
> I can't answer this question without knowing the answer to my question:
> what is string-make-unibyte used for.
It is used for converting a multibyte string to unibyte
before it is inserted in a unibyte buffer.
> I'm not saying that we can do something like:
> (defun string-make-unibyte (s) (encode-coding-string s <blabla>))
??? I have thought that you are saying that because you
wrote below:
> To do what your string-make-unibyte does you should use
> `encode-coding-string' where the coding system is passed explicitly.
Anyway,
> but I'm saying that everywhere where the current string-make-unibyte is
> used, we should be able to easily replace it by a call to
> encode-coding-string or a code to my make-string-unibyte (which does
> not pay attention to the language environment and only accepts multibyte
> chars that correspond to bytes, i.e. eight-bit-control or
> eight-bit-graphic, or ASCII, and multibyte chars whose internal code point
> is 128-255).
It's an ambiguous statement. Which are you sauing?
Replace string-make-unibyte by:
(1) encode-coding-string or make-string-unibyte.
(2) a code that applies encode-coding-string or
make-string-unibyte to the whole string depending on
something (perhaps on the input string?).
(3) a code that applies encode-coding-string to substrings
where that is appropriate, and applies make-string-unibyte
to the remaing substrings.
(4) something that I still don't understand.
>>> I don't see any use of string-make-unibyte in your two examples.
>> Again, I'd like to ask how to use encode-coding-string
>> without knowing the proper coding-system in each case.
> How could I know the coding-system to use when replacing
> `string-make-unibyte' if I don't have any actual call to
> string-make-unibyte to work with ?
What a strange logic?!? You have been argued that we should
replace string-make-unibyte with something that uses
encode-coding-string. Then you should have an idea about
what coding-system to use for encode-coding-string.
---
Ken'ichi HANDA
address@hidden
- Re: eight-bit char handling in emacs-unicode, (continued)
- Re: eight-bit char handling in emacs-unicode, Kenichi Handa, 2003/11/21
- Re: eight-bit char handling in emacs-unicode, Stefan Monnier, 2003/11/21
- Re: eight-bit char handling in emacs-unicode, Kenichi Handa, 2003/11/21
- Re: eight-bit char handling in emacs-unicode, Stefan Monnier, 2003/11/22
- Re: eight-bit char handling in emacs-unicode, Kenichi Handa, 2003/11/23
- Re: eight-bit char handling in emacs-unicode, Stefan Monnier, 2003/11/23
- Re: eight-bit char handling in emacs-unicode, Kenichi Handa, 2003/11/24
- Re: eight-bit char handling in emacs-unicode, Stefan Monnier, 2003/11/25
- Re: eight-bit char handling in emacs-unicode, Kenichi Handa, 2003/11/25
- Re: eight-bit char handling in emacs-unicode, Stefan Monnier, 2003/11/26
- Re: eight-bit char handling in emacs-unicode,
Kenichi Handa <=
- Re: eight-bit char handling in emacs-unicode, Stefan Monnier, 2003/11/27
- Re: eight-bit char handling in emacs-unicode, Kenichi Handa, 2003/11/30
- Re: eight-bit char handling in emacs-unicode, Richard Stallman, 2003/11/25
- Re: eight-bit char handling in emacs-unicode, Stefan Monnier, 2003/11/25
- Re: eight-bit char handling in emacs-unicode, Richard Stallman, 2003/11/26
- Re: eight-bit char handling in emacs-unicode, Stefan Monnier, 2003/11/26
- Re: eight-bit char handling in emacs-unicode, Richard Stallman, 2003/11/27
- Re: eight-bit char handling in emacs-unicode, Stefan Monnier, 2003/11/27
- Re: eight-bit char handling in emacs-unicode, Richard Stallman, 2003/11/29
- Re: eight-bit char handling in emacs-unicode, Stefan Monnier, 2003/11/30