//////////////////////////////////////////////////////////////////////////////// /// DISCLAIMER /// /// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany /// Copyright 2004-2014 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 ArangoDB GmbH, Cologne, Germany /// /// @author Jan Steemann //////////////////////////////////////////////////////////////////////////////// #ifndef ARANGODB_BASICS_CHAR_LENGTH_PAIR_H #define ARANGODB_BASICS_CHAR_LENGTH_PAIR_H 1 #include "Basics/Common.h" #include "Basics/fasthash.h" namespace arangodb { /// @brief a struct describing a C character array /// not responsible for memory management! struct CharLengthPair { CharLengthPair() = delete; explicit CharLengthPair(std::string const& str) : data(str.c_str()), length(str.size()) {} explicit CharLengthPair(char const* data) : data(data), length(strlen(data)) {} CharLengthPair(char const* data, size_t length) : data(data), length(length) {} char const* data; size_t length; }; } namespace std { template <> struct hash { size_t operator()(arangodb::CharLengthPair const& value) const noexcept { return fasthash64(value.data, value.length, 0xdeadbeef) ^ std::hash()(value.length); } }; template <> struct equal_to { bool operator()(arangodb::CharLengthPair const& lhs, arangodb::CharLengthPair const& rhs) const { if (lhs.length != rhs.length) { return false; } return (memcmp(lhs.data, rhs.data, lhs.length) == 0); } }; } #endif