mirror of https://gitee.com/bigwinds/arangodb
88 lines
2.4 KiB
C++
88 lines
2.4 KiB
C++
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief fundamental types for the optimisation and execution of AQL
|
|
///
|
|
/// @file
|
|
///
|
|
/// DISCLAIMER
|
|
///
|
|
/// Copyright 2010-2014 triagens GmbH, Cologne, Germany
|
|
///
|
|
/// Licensed under the Apache License, Version 2.0 (the "License");
|
|
/// you may not use this file except in compliance with the License.
|
|
/// You may obtain a copy of the License at
|
|
///
|
|
/// http://www.apache.org/licenses/LICENSE-2.0
|
|
///
|
|
/// Unless required by applicable law or agreed to in writing, software
|
|
/// distributed under the License is distributed on an "AS IS" BASIS,
|
|
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
/// See the License for the specific language governing permissions and
|
|
/// limitations under the License.
|
|
///
|
|
/// Copyright holder is triAGENS GmbH, Cologne, Germany
|
|
///
|
|
/// @author Max Neunhoeffer
|
|
/// @author Copyright 2014, triagens GmbH, Cologne, Germany
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef ARANGODB_AQL_TYPES_H
|
|
#define ARANGODB_AQL_TYPES_H 1
|
|
|
|
#include "Basics/Common.h"
|
|
|
|
namespace triagens {
|
|
namespace aql {
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief type for register numbers/ids
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
typedef unsigned int RegisterId;
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief Range, to hold a range compactly
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
struct Range {
|
|
Range () = delete;
|
|
|
|
Range (int64_t low,
|
|
int64_t high)
|
|
: _low(low),
|
|
_high(high) {
|
|
}
|
|
|
|
size_t size () const {
|
|
if (_low <= _high) {
|
|
// e.g. 1..1, 1..10 etc.
|
|
return _high - _low + 1;
|
|
}
|
|
// e.g. 10..1
|
|
return _low - _high + 1;
|
|
}
|
|
|
|
int64_t at (size_t position) const {
|
|
if (_low <= _high) {
|
|
// e.g. 1..1, 1..10 etc.
|
|
return _low + static_cast<int64_t>(position);
|
|
}
|
|
|
|
// e.g. 10..1
|
|
return _low - static_cast<int64_t>(position);
|
|
}
|
|
|
|
int64_t const _low;
|
|
int64_t const _high;
|
|
};
|
|
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
// Local Variables:
|
|
// mode: outline-minor
|
|
// outline-regexp: "^\\(/// @brief\\|/// {@inheritDoc}\\|/// @addtogroup\\|// --SECTION--\\|/// @\\}\\)"
|
|
// End:
|
|
|