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Re: set-buffer-file-coding-system and list-coding-systems
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From: |
Eli Zaretskii |
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Subject: |
Re: set-buffer-file-coding-system and list-coding-systems |
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Date: |
Sat, 15 Mar 2008 16:58:11 +0200 |
> From: Xah Lee <xah@xahlee.org>
> Date: Fri, 14 Mar 2008 21:25:15 -0700 (PDT)
>
> when i use “M-x set-buffer-file-coding-system RET unix” to turn a
> file's line ending from classic mac or dos to unix. However, when i
> use list-coding-systems, i see no value that is unix, mac, or dos.
That's because `unix' is an alias for `undecided-unix'; try "C-h C
unix RET". list-coding-systems only shows the basic encodings, not
all their aliases.
> I'm a bit confused by this, and the fact that emacs coding systems
> seems to marry file encoding with line ending.
EOL format is an orthogonal feature of encoding the text. The reason
it is part of coding systems is because conceptually writing a file
in, say, DOS format converts text from the Emacs internal format
(where each line ends in a single Newline character) into external
format, where each line ends with a CR-LF pair of characters. Such
conversions are at the heart of coding systems.