[Devel] uri-map: what is the `map` parameter for?

Gabriel Beddingfield gabrbedd at gmail.com
Mon Jul 18 14:23:22 PDT 2011

On Mon, Jul 18, 2011 at 4:10 PM, David Robillard <d at drobilla.net> wrote:
>> Just what *is* this map parameter for?  Docs say:
>> * @param map The 'context' of this URI.  Certain extensions may define a
>> *        URI that must be passed here with certain restrictions on the
>> *        return value (e.g. limited range).  This value may be NULL if
>> *        the plugin needs an ID for a URI in general.
>> Which doesn't give me any clues about what it's for... so I made it
>> NULL.  What I expect is a simple, global registry with URI ==> INT
>> mappings, so this 'context' thing has me befuddled.
>> Any hints?
> NULL should be legal.  Unfortunately this is a pretty bad bug in SLV2...
> which I didn't plan to make any new releases of :/

zynjacku has the same bug, too.

> However, this is related to a much deeper problem: the context argument
> was, as it turns out, a very huge mistake.  Very unfortunately, though,
> the event extension depends on it, so we are stuck.  The event extension
> is probably the single most troublesome one to replace.  I don't know
> what to do about this :(

I'll agree that it was a mistake.  But what was the intention?  That
the URI->INT mappings could be different for each extension?  And so
the `map` parameter was supposed to be the extention for which the URI
mapping is intended to be used with?  (Just a guess based on SLV2 and
zynjacku's code).


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