mirror of https://gitee.com/bigwinds/arangodb
79 lines
2.6 KiB
C++
79 lines
2.6 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief AQL range type
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2014 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Max Neunhoeffer
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/// @author Copyright 2014, ArangoDB GmbH, Cologne, Germany
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/// @author Copyright 2012-2013, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#include "Range.h"
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using namespace triagens::aql;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Range constructor
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////////////////////////////////////////////////////////////////////////////////
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Range::Range (int64_t low,
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int64_t high)
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: _low(low),
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_high(high) {
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief get number of elements in Range
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////////////////////////////////////////////////////////////////////////////////
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size_t Range::size () const {
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if (_low <= _high) {
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// e.g. 1..1, 1..10 etc.
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return static_cast<size_t>(_high - _low + 1);
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}
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// e.g. 10..1
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return static_cast<size_t>(_low - _high + 1);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief get element at position
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////////////////////////////////////////////////////////////////////////////////
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int64_t Range::at (size_t position) const {
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if (_low <= _high) {
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// e.g. 1..1, 1..10 etc.
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return _low + static_cast<int64_t>(position);
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}
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// e.g. 10..1
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return _low - static_cast<int64_t>(position);
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- END-OF-FILE
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// -----------------------------------------------------------------------------
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// Local Variables:
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// mode: outline-minor
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// outline-regexp: "/// @brief\\|/// {@inheritDoc}\\|/// @page\\|// --SECTION--\\|/// @\\}"
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// End:
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