Question: what's the benifit of compile in database support?

[Aidan Kehoe]

 Ar an naoú lá déag de mí na Samhain, scríobh FKtPp: 

 > I just think this is a very useful backend for some asian input methods.
 > 
 > 3~4 years ago there is a very famous GPLed chinese input method(wrote in cpp) named xsim, which is using bdb as its database backend.
 > 
 > And maybe some chinese user will be interested in porting that input method into XEmacs :D If they know XEmacs have a bdb database backend support...

Ah, interesting. If anyone is googling for this--or if you're considering
porting it over yourself :-)--they should note though that the
interpretation of the CODESYS argument to #'open-database is broken right
now, and I need to commit a change to fix that--backward-compatible code
should call #'decode-coding-string itself.

 > ----- Original Message ----
 > From: Aidan Kehoe <kehoea at parhasard.net>
 > To: FKtPp <m_pupil at yahoo.com.cn>
 > Cc: XEmacs Beta List <xemacs-beta at xemacs.org>
 > Sent: Monday, November 19, 2007 7:38:31 PM
 > Subject: Re: Question: what's the benifit of compile in database support?
 > 
 > 
 > 
 >  Ar an seachtú lá déag de mí na Samhain, scríobh FKtPp: 
 > 
 >  > Dear developers,
 >  > 
 >  > As the subject said I have a stupid question, what is the advantages
 >  > of compile in a database support like:
 >  > 
 >  > --8<---------------cut here---------------start------------->8---
 >  > Databases:
 >  >   Compiling in support for Berkeley database.
 >  > --8<---------------cut here---------------end--------------->8---
 >  > 
 >  > Can I use this in elisp scripts inside XEmacs, 
 > 
 > Yes. 
 > 
 >  > If so, how to use it? 
 > 
 > (setq my-database-handle (open-database (expand-file-name
 >  "~/my-database")
 >                     'berkeley-db nil "rw+" #o644))
 > => #<database "/home/aidan/my-database" (berkeley-db/hash/readwrite)
 >  0x6e7cba>
 > 
 > (put-database "key" "value" my-database-handle)
 > => nil
 > 
 > (close-database my-database-handle)
 > => nil
 > 
 > (setq my-new-database-handle (open-database (expand-file-name
 >  "~/my-database")
 >                     'berkeley-db nil "r" #o644))
 > => #<database "/home/aidan/my-database" (berkeley-db/hash/readonly)
 >  0x70a2ba>
 > 
 > (get-database "key" my-new-database-handle)
 > => "value"
 > 
 >  > Is there any documents/info pages describe this kind of usage?
 > 
 > Just the docstrings, I'm afraid. F1 f open-database RET , F1 f
 >  get-database
 > RET, and the other most relevant functions are map-database, put-dabase
 >  and
 > remove-database. 
 > 
 > The code isn't used much, probably because this support is not
 >  available
 > under GNU Emacs. I intend merging a very hacked version of their
 > descr-text.el that uses the database support to store index information
 >  for
 > Unihan.txt in the next few weeks though, so that will change a little.
 > 
 > -- 
 > ¿Dónde estará ahora mi sobrino Yoghurtu Nghé, que tuvo que huir
 > precipitadamente de la aldea por culpa de la escasez de rinocerontes?
 > 
 > 
 > 
 > 
 > 
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-- 
¿Dónde estará ahora mi sobrino Yoghurtu Nghé, que tuvo que huir
precipitadamente de la aldea por culpa de la escasez de rinocerontes?