D18825: Replace recursive isDirHidden with iterative one, allow const argument

[Stefan Brüns]

bruns created this revision.
bruns added reviewers: Baloo, Frameworks, poboiko, ngraham.
Herald added projects: Frameworks, Baloo.
Herald added a subscriber: kde-frameworks-devel.
bruns requested review of this revision.

REVISION SUMMARY
  The non-unix implementation modifies its QDir argument to walk up the
  tree. Create a copy instead.
  The copy cost is amortized by no longer having to reset the dir in the
  calling code, for the unix-code it is a net win.

REPOSITORY
  R293 Baloo

BRANCH
  submit2

REVISION DETAIL
  https://phabricator.kde.org/D18825

AFFECTED FILES
  src/file/fileindexerconfig.cpp

To: bruns, #baloo, #frameworks, poboiko, ngraham
Cc: kde-frameworks-devel, ashaposhnikov, michaelh, astippich, spoorun, ngraham, bruns, abrahams
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