[Bug 66437] VirtualDocumentRoot %N.M method with multiple digit numbers not working

[bugzilla]

https://bz.apache.org/bugzilla/show_bug.cgi?id=66437

--- Comment #2 from Christophe JAILLET  ---
Created attachment 38484
  --> https://bz.apache.org/bugzilla/attachment.cgi?id=38484=edit
Patch to remove the <9 limitation for N and M

Hi,

attached a patch that should remove the limitation of N or M <= 9.

Basically, the improvements are:
  - parse the format string only once at start-up and stores each part in a
link chain
  - N and M can be up to an 'int'
  - handle the invariant parts of the "interpolated-directory" one string at a
time, instead of one char at a time

So, I hope that it should also save a few cycles at runtime and easy any other
format extension.

This passes the test-framework modified with:
   VirtualDocumentRoot htdocs/modules/vhost_alias/%2/%1.15/%-2/%2+
   


Feedback on the WIP welcomed.


I'll continue on it next week in order to:
   - use varbuf to avoid the final copy of the string and remove the
HUGE_STRING_LEN (8192) limitation

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[Bug 66437] VirtualDocumentRoot %N.M method with multiple digit numbers not working

[bugzilla]

https://bz.apache.org/bugzilla/show_bug.cgi?id=66437

--- Comment #1 from Rich Bowen  ---
I thought that this fact was documented (it's not) and I know that I've
mentioned it many times as a limitation, over the years, in presentations given
about this module.

Yes, N and M are limited to the range -9 to 9.

Which isn't to say that your bug report is false. Just that this is
known/expected behavior. (That said, this could certainly be a worthwhile
improvement to the module.)

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