mirror of https://gitee.com/bigwinds/arangodb
134 lines
5.1 KiB
C++
134 lines
5.1 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief Aql, short string storage
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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 Jan Steemann
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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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#ifndef ARANGODB_AQL_SHORT_STRING_STORAGE_H
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#define ARANGODB_AQL_SHORT_STRING_STORAGE_H 1
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#include "Basics/Common.h"
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namespace triagens {
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namespace aql {
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// -----------------------------------------------------------------------------
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// --SECTION-- class ShortStringStorage
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// -----------------------------------------------------------------------------
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class ShortStringStorage {
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// -----------------------------------------------------------------------------
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// --SECTION-- constructors / destructors
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// -----------------------------------------------------------------------------
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public:
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ShortStringStorage (ShortStringStorage const&) = delete;
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ShortStringStorage& operator= (ShortStringStorage const&) = delete;
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explicit ShortStringStorage (size_t);
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~ShortStringStorage ();
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// -----------------------------------------------------------------------------
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// --SECTION-- public functions
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @brief register a short string
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////////////////////////////////////////////////////////////////////////////////
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char* registerString (char const*,
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size_t);
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// -----------------------------------------------------------------------------
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// --SECTION-- private functions
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @brief allocate a new block of memory
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////////////////////////////////////////////////////////////////////////////////
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void allocateBlock ();
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// -----------------------------------------------------------------------------
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// --SECTION-- public variables
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// -----------------------------------------------------------------------------
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public:
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////////////////////////////////////////////////////////////////////////////////
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/// @brief maximum length of strings in short string storage
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////////////////////////////////////////////////////////////////////////////////
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static size_t const MaxStringLength;
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// -----------------------------------------------------------------------------
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// --SECTION-- private variables
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// -----------------------------------------------------------------------------
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private:
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////////////////////////////////////////////////////////////////////////////////
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/// @brief already allocated string blocks
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////////////////////////////////////////////////////////////////////////////////
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std::vector<char*> _blocks;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief size of each block
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////////////////////////////////////////////////////////////////////////////////
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size_t const _blockSize;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief offset into current block
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////////////////////////////////////////////////////////////////////////////////
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char* _current;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief end of current block
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////////////////////////////////////////////////////////////////////////////////
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char* _end;
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};
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}
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}
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#endif
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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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