mirror of https://gitee.com/bigwinds/arangodb
81 lines
2.5 KiB
C++
81 lines
2.5 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2016 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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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGOD_AQL_QUERY_STRING_H
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#define ARANGOD_AQL_QUERY_STRING_H 1
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#include "Basics/Common.h"
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#include <velocypack/StringRef.h>
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#include <iosfwd>
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namespace arangodb {
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namespace aql {
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/// View on a query string, does no memory management
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class QueryString {
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public:
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QueryString(QueryString const& other) = default;
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QueryString& operator=(QueryString const& other) = default;
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QueryString(char const* data, size_t length)
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: _queryString(data, length), _hash(0), _hashed(false) {}
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explicit QueryString(arangodb::velocypack::StringRef const& ref)
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: QueryString(ref.data(), ref.size()) {}
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explicit QueryString(std::string const& val)
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: QueryString(val.data(), val.size()) {}
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explicit QueryString(std::string&& val)
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: _queryString(std::move(val)), _hash(0), _hashed(false) {}
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QueryString() : QueryString("", 0) {}
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~QueryString() = default;
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public:
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std::string const& string() const noexcept { return _queryString; }
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char const* data() const { return _queryString.data(); }
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size_t size() const { return _queryString.size(); }
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size_t length() const { return _queryString.size(); }
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bool empty() const {
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return (_queryString.empty() || _queryString[0] == '\0');
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}
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void append(std::string& out) const;
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uint64_t hash() const;
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std::string extract(size_t maxLength) const;
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std::string extractRegion(int line, int column) const;
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private:
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std::string _queryString;
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mutable uint64_t _hash;
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mutable bool _hashed;
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};
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std::ostream& operator<<(std::ostream&, QueryString const&);
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} // namespace aql
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} // namespace arangodb
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#endif
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