Roan Kattouw wrote:
> On Fri, Sep 23, 2011 at 11:52 PM, Platonides<[email protected]> wrote:
>> Maybe we should provide a way to generate namespaces for extensions.
>> The simplest way, using a global which is updated by each extension
>> reserving a namespace is too fragile, but maybe we could produce
>> something similar to ftok(3) to derive a free namespace number.
>>
> TimedMediaHandler tried to do this (it picked the lowest free
> namespace number above 100 or something), and I made Michael take it
> out. The reason was that variable namespace numbers are very, very,
> bad:
>
> * It will usually result in the same namespace having different
> numbers on different wikis
> * If you add site-specific namespaces or install another extension
> using the same technique, the namespace number may change and all your
> pages will be messed up
>
> Roan
Well, that's why I said that a simple approach wouldn't work.
Compare the conflict of
for ($i = 100; ; $i++)
if (!isset($namespaces[$i])
return $i;
with an approach like
$name = 'TimedMediaHandler';
do {
$name = md5($name);
$n = 100 + hexdec(substr($name, -2));
} while (isset($namespaces[$n]));
return $n;
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