cpNNN and ibmNNN coding systems, mm-charset-synonym-alist (was: emacs-unicode-2: cpNNN and ibmNNN coding systems)

cpNNN and ibmNNN coding systems, mm-charset-synonym-alist (was: emacs-unicode-2: cpNNN and ibmNNN coding systems)

[Reiner Steib]

[ Redirecting from emacs-pretest-bug to ding.
  See http://thread.gmane.org/v9lkng5nwy.fsf@marauder.physik.uni-ulm.de ]

On Mon, Oct 16 2006, Reiner Steib wrote:

> in emacs-unicode-2, the coding systems ibm437 and cp437 are aliases:
[...]
> However, according to
> <ftp://ftp.unicode.org/Public/MAPPINGS/VENDORS/IBM/README.TXT>, there
> are minor (?) differences between the Microsoft and IBM mappings:
[...]
> [ Background: Today there was a posting with "charset=IBM437" in
>   de.comp.text.tex (<news:A2xVkTHYQoB@v-li.fqdn.th-h.de>).  I thought
>   of adding an alias (ibm437 . cp437) in `mm-charset-synonym-alist'
>   (Gnus), but I wasn't sure if it's correct. ]

I've now added aliases via `mm-codepage-ibm-list':

	* mm-util.el (mm-codepage-iso-8859-list, mm-codepage-ibm-list): New
	variables.
	(mm-setup-codepage-iso-8859, mm-setup-codepage-ibm): New functions.
	(mm-charset-synonym-alist): Move some entries to
	mm-codepage-iso-8859-list.

Comments/review welcome.  If nobody can see a problem with this, I'll
install this change in v5-10 as well.

Maybe we should go one step further: Introduce one more *customizable*
variable and build `mm-charset-synonym-alist' at runtime from the new
variable, `mm-codepage-iso-8859-list' and `mm-codepage-ibm-list'.
(`mm-charset-synonym-alist' is not customizable and probably shouldn't
be.)

Bye, Reiner.
-- 
       ,,,
      (o o)
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