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Re: tar-mode
From: |
Kenichi Handa |
Subject: |
Re: tar-mode |
Date: |
Wed, 26 Feb 2003 20:53:56 +0900 (JST) |
User-agent: |
SEMI/1.14.3 (Ushinoya) FLIM/1.14.2 (Yagi-Nishiguchi) APEL/10.2 Emacs/21.2.92 (sparc-sun-solaris2.6) MULE/5.0 (SAKAKI) |
In article <address@hidden>, "Stefan Monnier" <monnier+gnu/address@hidden>
writes:
>> I still don't understand the necessity of the helper buffer.
>> When tar-mode is called, usually the current buffer is
>> unibyte, so there's no need of moving the contents to
>> another buffer. Instead, it creates a buffer for table of
>> contents, setup that buffer, then switch to that buffer.
> How are you going to "switch to that buffer" ?
> Can you really expect that none of the callers have done some
> kind of save-current-buffer ?
> Hmm...looking at the code, it does seem like there really isn't
> any save-current-buffer interfering. Can we rely on that ?
> Should we document it ?
I have not yet considered this method in deep.
> It's rather unusual for a major-mode function to switch the
> current buffer.
Yes. I agree that it's a fragile operation. But, it seems
that it is the only way to avoid moving or copying 24MB
memory.
Ah... I think I understand what you mean by "swap" and
"helper buffer". What you are suggesting is something like
this, isn't it?
In the function tar-mode,
...
(setq helper-buffer (generate-new-buffer ...))
(swap-buffer-contents helper-buffer)
;; Now the current buffer is empty.
(tar-mode-setup-table-of-contents helper-buffer)
(add-hook 'write-file-functions
'tar-mode-write-helper-buffer)
...
---
Ken'ichi HANDA
address@hidden
- Re: setenv -> locale-coding-system cannot handle ASCII?!, (continued)
- Re: setenv -> locale-coding-system cannot handle ASCII?!, Kenichi Handa, 2003/02/25
- Re: setenv -> locale-coding-system cannot handle ASCII?!, Stefan Monnier, 2003/02/25
- Re: setenv -> locale-coding-system cannot handle ASCII?!, Kenichi Handa, 2003/02/26
- Re: setenv -> locale-coding-system cannot handle ASCII?!, Stefan Monnier, 2003/02/26
- Re: setenv -> locale-coding-system cannot handle ASCII?!, Kenichi Handa, 2003/02/26
- Re: setenv -> locale-coding-system cannot handle ASCII?!, Kenichi Handa, 2003/02/26
- Re: setenv -> locale-coding-system cannot handle ASCII?!, Stefan Monnier, 2003/02/26
- Re: setenv -> locale-coding-system cannot handle ASCII?!, Stefan Monnier, 2003/02/26
- tar-mode, Kenichi Handa, 2003/02/26
- Re: tar-mode, Stefan Monnier, 2003/02/26
- Re: tar-mode,
Kenichi Handa <=
- Re: tar-mode, Stefan Monnier, 2003/02/26
- Re: setenv -> locale-coding-system cannot handle ASCII?!, Richard Stallman, 2003/02/26
- Re: setenv -> locale-coding-system cannot handle ASCII?!, Richard Stallman, 2003/02/26
- Re: setenv -> locale-coding-system cannot handle ASCII?!, Richard Stallman, 2003/02/26
- Re: setenv -> locale-coding-system cannot handle ASCII?!, Richard Stallman, 2003/02/26
- Re: setenv -> locale-coding-system cannot handle ASCII?!, Miles Bader, 2003/02/26
- Re: setenv -> locale-coding-system cannot handle ASCII?!, Richard Stallman, 2003/02/26