mirror of https://gitee.com/bigwinds/arangodb
105 lines
4.0 KiB
C++
105 lines
4.0 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2018 ArangoDB 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 Simon Grätzer
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////////////////////////////////////////////////////////////////////////////////
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#include "RocksDBFormat.h"
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#include "Logger/Logger.h"
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namespace {
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// little endian
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inline uint16_t uint16FromPersistentLE(char const* p) {
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return arangodb::rocksutils::uintFromPersistentLittleEndian<uint16_t>(p);
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}
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inline uint32_t uint32FromPersistentLE(char const* p) {
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return arangodb::rocksutils::uintFromPersistentLittleEndian<uint32_t>(p);
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}
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inline uint64_t uint64FromPersistentLE(char const* p) {
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return arangodb::rocksutils::uintFromPersistentLittleEndian<uint64_t>(p);
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}
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inline void uint16ToPersistentLE(std::string& p, uint16_t value) {
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arangodb::rocksutils::uintToPersistentLittleEndian<uint16_t>(p, value);
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}
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inline void uint32ToPersistentLE(std::string& p, uint32_t value) {
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arangodb::rocksutils::uintToPersistentLittleEndian<uint32_t>(p, value);
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}
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inline void uint64ToPersistentLE(std::string& p, uint64_t value) {
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arangodb::rocksutils::uintToPersistentLittleEndian<uint64_t>(p, value);
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}
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// Big endian
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inline uint16_t uint16FromPersistentBE(char const* p) {
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return arangodb::rocksutils::uintFromPersistentBigEndian<uint16_t>(p);
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}
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inline uint32_t uint32FromPersistentBE(char const* p) {
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return arangodb::rocksutils::uintFromPersistentBigEndian<uint32_t>(p);
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}
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inline uint64_t uint64FromPersistentBE(char const* p) {
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return arangodb::rocksutils::uintFromPersistentBigEndian<uint64_t>(p);
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}
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inline void uint16ToPersistentBE(std::string& p, uint16_t value) {
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arangodb::rocksutils::uintToPersistentBigEndian<uint16_t>(p, value);
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}
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inline void uint32ToPersistentBE(std::string& p, uint32_t value) {
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arangodb::rocksutils::uintToPersistentBigEndian<uint32_t>(p, value);
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}
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inline void uint64ToPersistentBE(std::string& p, uint64_t value) {
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arangodb::rocksutils::uintToPersistentBigEndian<uint64_t>(p, value);
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}
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} // namespace
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namespace arangodb {
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namespace rocksutils {
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uint16_t (*uint16FromPersistent)(char const* p) = nullptr;
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uint32_t (*uint32FromPersistent)(char const* p) = nullptr;
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uint64_t (*uint64FromPersistent)(char const* p) = nullptr;
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void (*uint16ToPersistent)(std::string& p, uint16_t value) = nullptr;
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void (*uint32ToPersistent)(std::string& p, uint32_t value) = nullptr;
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void (*uint64ToPersistent)(std::string& p, uint64_t value) = nullptr;
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void setRocksDBKeyFormatEndianess(RocksDBEndianness e) {
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if (e == RocksDBEndianness::Little) {
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LOG_TOPIC(DEBUG, Logger::ENGINES) << "using little-endian keys";
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uint16FromPersistent = &uint16FromPersistentLE;
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uint32FromPersistent = &uint32FromPersistentLE;
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uint64FromPersistent = &uint64FromPersistentLE;
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uint16ToPersistent = &uint16ToPersistentLE;
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uint32ToPersistent = &uint32ToPersistentLE;
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uint64ToPersistent = &uint64ToPersistentLE;
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return;
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} else if (e == RocksDBEndianness::Big) {
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LOG_TOPIC(DEBUG, Logger::ENGINES) << "using big-endian keys";
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uint16FromPersistent = &uint16FromPersistentBE;
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uint32FromPersistent = &uint32FromPersistentBE;
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uint64FromPersistent = &uint64FromPersistentBE;
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uint16ToPersistent = &uint16ToPersistentBE;
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uint32ToPersistent = &uint32ToPersistentBE;
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uint64ToPersistent = &uint64ToPersistentBE;
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return;
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}
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LOG_TOPIC(FATAL, Logger::ENGINES) << "Invalid key endianess";
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FATAL_ERROR_EXIT();
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}
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} // namespace rocksutils
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} // namespace arangodb
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