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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-13 12:24:36 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-13 12:24:36 +0000 |
commit | 06eaf7232e9a920468c0f8d74dcf2fe8b555501c (patch) | |
tree | e2c7b5777f728320e5b5542b6213fd3591ba51e2 /storage/oqgraph/oqgraph_shim.cc | |
parent | Initial commit. (diff) | |
download | mariadb-06eaf7232e9a920468c0f8d74dcf2fe8b555501c.tar.xz mariadb-06eaf7232e9a920468c0f8d74dcf2fe8b555501c.zip |
Adding upstream version 1:10.11.6.upstream/1%10.11.6
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'storage/oqgraph/oqgraph_shim.cc')
-rw-r--r-- | storage/oqgraph/oqgraph_shim.cc | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/storage/oqgraph/oqgraph_shim.cc b/storage/oqgraph/oqgraph_shim.cc new file mode 100644 index 00000000..3633b034 --- /dev/null +++ b/storage/oqgraph/oqgraph_shim.cc @@ -0,0 +1,74 @@ +/* Copyright (C) 2007-2013 Arjen G Lentz & Antony T Curtis for Open Query + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */ + +/* ====================================================================== + Open Query Graph Computation Engine, based on a concept by Arjen Lentz + v3 implementation by Antony Curtis, Arjen Lentz, Andrew McDonnell + For more information, documentation, support, enhancement engineering, + see http://openquery.com/graph or contact graph@openquery.com + ====================================================================== +*/ + +#include "oqgraph_shim.h" + +bool oqgraph3::edge_iterator::seek() +{ + if (!_graph->_cursor || + _graph->_rnd_pos > _offset || + _graph->_cursor != _graph->_rnd_cursor.operator->()) + { + _graph->_rnd_pos= 0; + _graph->_rnd_cursor= new cursor(_graph); + if (_graph->_rnd_cursor->seek_to(boost::none, boost::none)) + _graph->_rnd_pos= size_t(-1); + } + while (_graph->_rnd_pos < _offset) + { + if (_graph->_rnd_cursor->seek_next()) + { + _offset = size_t(-1); + return true; + } + _graph->_rnd_pos++; + } + return false; +} + +oqgraph3::edge_iterator::value_type oqgraph3::edge_iterator::operator*() +{ + seek(); + return *_graph->_rnd_cursor; +} + +bool oqgraph3::edge_iterator::operator==(const self& x) +{ + if (_offset == size_t(-1) && x._offset != size_t(-1)) + return const_cast<edge_iterator&>(x).seek(); + if (_offset != size_t(-1) && x._offset == size_t(-1)) + return seek(); + + return _offset == x._offset; +} + +bool oqgraph3::edge_iterator::operator!=(const self& x) +{ + if (_offset == size_t(-1) && x._offset != size_t(-1)) + return !const_cast<edge_iterator&>(x).seek(); + if (_offset != size_t(-1) && x._offset == size_t(-1)) + return !seek(); + + return _offset != x._offset; +} |