mirror of
https://github.com/facebook/rocksdb.git
synced 2024-11-27 20:43:57 +00:00
62247ffa3b
Summary: When using latest clang (3.6 or 3.7/trunck) rocksdb is failing with many errors. Almost all of them are missing override errors. This diff adds missing override keyword. No manual changes. Prerequisites: bear and clang 3.5 build with extra tools ```lang=bash % USE_CLANG=1 bear make all # generate a compilation database http://clang.llvm.org/docs/JSONCompilationDatabase.html % clang-modernize -p . -include . -add-override % make format ``` Test Plan: Make sure all tests are passing. ```lang=bash % #Use default fb code clang. % make check ``` Verify less error and no missing override errors. ```lang=bash % # Have trunk clang present in path. % ROCKSDB_NO_FBCODE=1 CC=clang CXX=clang++ make ``` Reviewers: igor, kradhakrishnan, rven, meyering, sdong Reviewed By: sdong Subscribers: dhruba, leveldb Differential Revision: https://reviews.facebook.net/D34077
107 lines
3 KiB
C++
107 lines
3 KiB
C++
// Copyright (c) 2013, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under the BSD-style license found in the
|
|
// LICENSE file in the root directory of this source tree. An additional grant
|
|
// of patent rights can be found in the PATENTS file in the same directory.
|
|
//
|
|
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file. See the AUTHORS file for names of contributors.
|
|
|
|
#include <algorithm>
|
|
#include <stdint.h>
|
|
#include "rocksdb/comparator.h"
|
|
#include "rocksdb/slice.h"
|
|
#include "port/port.h"
|
|
#include "util/logging.h"
|
|
|
|
namespace rocksdb {
|
|
|
|
Comparator::~Comparator() { }
|
|
|
|
namespace {
|
|
class BytewiseComparatorImpl : public Comparator {
|
|
public:
|
|
BytewiseComparatorImpl() { }
|
|
|
|
virtual const char* Name() const override {
|
|
return "leveldb.BytewiseComparator";
|
|
}
|
|
|
|
virtual int Compare(const Slice& a, const Slice& b) const override {
|
|
return a.compare(b);
|
|
}
|
|
|
|
virtual void FindShortestSeparator(std::string* start,
|
|
const Slice& limit) const override {
|
|
// Find length of common prefix
|
|
size_t min_length = std::min(start->size(), limit.size());
|
|
size_t diff_index = 0;
|
|
while ((diff_index < min_length) &&
|
|
((*start)[diff_index] == limit[diff_index])) {
|
|
diff_index++;
|
|
}
|
|
|
|
if (diff_index >= min_length) {
|
|
// Do not shorten if one string is a prefix of the other
|
|
} else {
|
|
uint8_t diff_byte = static_cast<uint8_t>((*start)[diff_index]);
|
|
if (diff_byte < static_cast<uint8_t>(0xff) &&
|
|
diff_byte + 1 < static_cast<uint8_t>(limit[diff_index])) {
|
|
(*start)[diff_index]++;
|
|
start->resize(diff_index + 1);
|
|
assert(Compare(*start, limit) < 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
virtual void FindShortSuccessor(std::string* key) const override {
|
|
// Find first character that can be incremented
|
|
size_t n = key->size();
|
|
for (size_t i = 0; i < n; i++) {
|
|
const uint8_t byte = (*key)[i];
|
|
if (byte != static_cast<uint8_t>(0xff)) {
|
|
(*key)[i] = byte + 1;
|
|
key->resize(i+1);
|
|
return;
|
|
}
|
|
}
|
|
// *key is a run of 0xffs. Leave it alone.
|
|
}
|
|
};
|
|
|
|
class ReverseBytewiseComparatorImpl : public BytewiseComparatorImpl {
|
|
public:
|
|
ReverseBytewiseComparatorImpl() { }
|
|
|
|
virtual const char* Name() const override {
|
|
return "rocksdb.ReverseBytewiseComparator";
|
|
}
|
|
|
|
virtual int Compare(const Slice& a, const Slice& b) const override {
|
|
return -a.compare(b);
|
|
}
|
|
};
|
|
|
|
}// namespace
|
|
|
|
static port::OnceType once = LEVELDB_ONCE_INIT;
|
|
static const Comparator* bytewise;
|
|
static const Comparator* rbytewise;
|
|
|
|
static void InitModule() {
|
|
bytewise = new BytewiseComparatorImpl;
|
|
rbytewise= new ReverseBytewiseComparatorImpl;
|
|
}
|
|
|
|
const Comparator* BytewiseComparator() {
|
|
port::InitOnce(&once, InitModule);
|
|
return bytewise;
|
|
}
|
|
|
|
const Comparator* ReverseBytewiseComparator() {
|
|
port::InitOnce(&once, InitModule);
|
|
return rbytewise;
|
|
}
|
|
|
|
} // namespace rocksdb
|