directaccess: make sure gethashsymbols does not return rev numbers
With "hg log -r 1 -r 2 -r 3", gethashsymbols will get the following tree:
('func', ('symbol', '_list'), ('string', '1\x002\x003'))
Before this patch, it will return ['1', '2', '3'], which are revision
numbers and causes unnecessary (expensive) partialmatch lookups.
This patch refacts gethashsymbols a bit, making sure the returning values
are always filtered.
This software was downloaded from
http://hg.netv6.net/evolve-main/
Copyright 2011 Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
Logilab SA <contact@logilab.fr>
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
Patrick Mezard <patrick@mezard.eu>
This software may be used and distributed according to the terms of the GNU
General Public License version 2 or any later version.
On Debian systems, the complete text of the GNU General Public License version
2 can be found in `/usr/share/common-licenses/GPL-2'.