Re: Convert UTF-8

[Andreas Politz <politza@fh-trier.de>]

YOUNG wrote:
> Hi,
> 
> I have a Emacs 22.3.1 for Windows XP, and there is a file encoded in
> ASCII. I am trying to read the file and convert it to UTF-8 with
> emacs.
> 

If I am not mistaken, converting a ASCII file to UTF-8 is an identity operation,
since the later is backwards compatible to the former. So there would be nothing
to convert.

-ap

> I have tried
> 
> M-x set-buffer-file-coding-system
> 
> and set up utf-8 and check it has changed to 'u' in status bar, and
> since buffer has changed, it shows '**' as well.
> 
> So, I write the file using "C-x s".
> 
> It seems to fine. So, I exit the emacs, and rerun the emacs again and
> read the file, too. However, the file is not converted at all.
> 
> Here is when I did "describe-current-coding-system"
> 
> ----------------------
> 
> Coding system for saving this buffer:
>   - -- undecided-dos
> 
> Default coding system (for new files):
>   u -- mule-utf-8 (alias: utf-8)
> 
> Coding system for keyboard input:
>   * -- cp1252 (alias of windows-1252)
> 
> Coding system for terminal output:
>   * -- cp1252 (alias of windows-1252)
> 
> Defaults for subprocess I/O:
>   decoding: u -- mule-utf-8-dos
> 
>   encoding: u -- mule-utf-8-unix
> 
> 
> Priority order for recognizing coding systems when reading files:
>   1. mule-utf-8 (alias: utf-8)
>   2. iso-latin-1 (alias: iso-8859-1 latin-1)
>   3. mule-utf-16be-with-signature (alias: utf-16be-with-signature mule-
> utf-16-be utf-16-be)
>   4. mule-utf-16le-with-signature (alias: utf-16le-with-signature mule-
> utf-16-le utf-16-le)
>   5. iso-2022-jp (alias: junet)
>   6. iso-2022-7bit
>   7. iso-2022-7bit-lock (alias: iso-2022-int-1)
>   8. iso-2022-8bit-ss2
>   9. emacs-mule
>   10. raw-text
>   11. japanese-shift-jis (alias: shift_jis sjis cp932)
>   12. chinese-big5 (alias: big5 cn-big5 cp950)
>   13. no-conversion
> 
>   Other coding systems cannot be distinguished automatically
>   from these, and therefore cannot be recognized automatically
>   with the present coding system priorities.
> 
>   The following are decoded correctly but recognized as iso-2022-7bit-
> lock:
>     iso-2022-7bit-ss2 iso-2022-7bit-lock-ss2 iso-2022-cn iso-2022-cn-
> ext iso-2022-jp-2 iso-2022-kr
> 
> Particular coding systems specified for certain file names:
> 
>   OPERATION	TARGET PATTERN		CODING SYSTEM(s)
>   ---------	--------------		----------------
>   File I/O	"\\.dz\\'"		(no-conversion . no-conversion)
> 		"\\.g?z\\(~\\|\\.~[0-9]+~\\)?\\'"
> 					(no-conversion . no-conversion)
> 		"\\.tgz\\'"		(no-conversion . no-conversion)
> 		"\\.tbz\\'"		(no-conversion . no-conversion)
> 		"\\.bz2\\(~\\|\\.~[0-9]+~\\)?\\'"
> 					(no-conversion . no-conversion)
> 		"\\.Z\\(~\\|\\.~[0-9]+~\\)?\\'"
> 					(no-conversion . no-conversion)
> 		"\\.elc\\'"		(emacs-mule . emacs-mule)
> 		"\\.utf\\(-8\\)?\\'"	utf-8
> 		"\\(\\`\\|/\\)loaddefs.el\\'"
> 					(raw-text . raw-text-unix)
> 		"\\.tar\\'"		(no-conversion . no-conversion)
> 		"\\.po[tx]?\\'\\|\\.po\\."
> 					po-find-file-coding-system
> 		"\\.\\(tex\\|ltx\\|dtx\\|drv\\)\\'"
> 					latexenc-find-file-coding-system
> 		""			find-buffer-file-type-coding-system
>   Process I/O	"[pP][lL][iI][nN][kK]"	(undecided-dos . undecided-dos)
> 		"[cC][mM][dD][pP][rR][oO][xX][yY]"
> 					(undecided-dos . undecided-dos)
>   Network I/O	nothing specified
> ----------------------
> 
> Do you know how to convert a file to UTF-8 using emacs, please?
>