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Commit both PR and internal code review changes

This commit is contained in:
Dmitri Smirnov 2015-07-07 16:58:20 -07:00
parent e25ee32e3d
commit ef4b87f1b2
34 changed files with 245 additions and 329 deletions
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3
CMakeLists.txt
View File

@ -1,8 +1,9 @@
# This cmake build is for Windows only.
#
# Prerequisites:
# You must have Visual Studio 2013 installed. Start the Developer Command Prompt window that is a part of Visual Studio installation.
# You must have Visual Studio 2013 Update 4 installed. Start the Developer Command Prompt window that is a part of Visual Studio installation.
# Run the build commands from within the Developer Command Prompt window to have paths to the compiler and runtime libraries set.
# Make sure that Git is in your PATH
#
# To build Rocksdb for Windows is as easy as 1-2-3-4-5:
#

3
INSTALL.md
View File

@ -80,3 +80,6 @@ your make commands, like this: `PORTABLE=1 make static_lib`
* **iOS**:
* Run: `TARGET_OS=IOS make static_lib`. When building the project which uses rocksdb iOS library, make sure to define two important pre-processing macros: `ROCKSDB_LITE` and `IOS_CROSS_COMPILE`.
* **Windows**:
* Read the follow the instructions at CMakeLists.txt

4
WINDOWS_PORT.md
View File

@ -15,7 +15,7 @@ These notes describe some decisions and changes we had to make with regards to p
We are open for comments and improvements.
## OS specifics
All of the porting, testing and benchmarking was done on Windows Server 2012 R2 Datacenter but to the best of our knowledge there is not a specific API we used during porting that is unsupported on other Windows OS after Vista.
All of the porting, testing and benchmarking was done on Windows Server 2012 R2 Datacenter 64-bit but to the best of our knowledge there is not a specific API we used during porting that is unsupported on other Windows OS after Vista.
## Porting goals
We strive to achieve the following goals:
@ -34,6 +34,8 @@ At the same time it generates Visual Studio projects that are both usable from a
The top-level CMakeLists.txt file contains description of all targets and build rules. It also provides brief instructions on how to build the software for Windows. One more build related file is thirdparty.inc that also resides on the top level. This file must be edited to point to actual third party libraries location.
We think that it would be beneficial to merge the existing make-based build system and the new cmake-based build system into a single one to use on all platforms.
All building and testing was done for 64-bit. We have not conducted any testing for 32-bit and early reports indicate that it will not run on 32-bit.
## C++ and STL notes
We had to make some minimum changes within the portable files that either account for OS differences or the shortcomings of C++11 support in the current version of the MS compiler. Most or all of them are expected to be fixed in the upcoming compiler releases.

24
build_tools/build_detect_version.bat
View File

@ -1,24 +0,0 @@
@echo off
REM Record the version of the source that we are compiling.
REM We keep a record of the git revision in util/version.cc. This source file
REM is then built as a regular source file as part of the compilation process.
REM One can run "strings executable_filename | grep _build_" to find the version of
REM the source that we used to build the executable file.
set CONFIGURATION=%1
pushd "%~dp0"
set "OUTFILE="..\util\build_version_%CONFIGURATION%.cc"
REM GIT_SHA=""
REM if command -v git >/dev/null 2>&1; then
REM GIT_SHA=$(git rev-parse HEAD 2>/dev/null)
REM fi
@echo #include "build_version.h" > %OUTFILE%
@echo const char* rocksdb_build_git_sha = "rocksdb_build_git_sha:${GIT_SHA}"; >> %OUTFILE%
@echo const char* rocksdb_build_git_datetime = "rocksdb_build_git_datetime:$(date)"; >> %OUTFILE%
@echo const char* rocksdb_build_compile_date = __DATE__; >> %OUTFILE%
@popd

99
build_tools/runall.bat
View File

@ -1,99 +0,0 @@
@echo off
call :init
call :runtest arena_test.exe
call :runtest autovector_test.exe
call :runtest auto_roll_logger_test.exe
call :runtest backupable_db_test.exe
rem call :runtest benchharness_test.exe
call :runtest block_based_filter_block_test.exe
call :runtest block_hash_index_test.exe
call :runtest block_test.exe
call :runtest bloom_test.exe
call :runtest cache_test.exe
call :runtest coding_test.exe
call :runtest column_family_test.exe
call :runtest compaction_job_test.exe
call :runtest compaction_picker_test.exe
call :runtest comparator_db_test.exe
call :runtest corruption_test.exe
call :runtest crc32c_test.exe
call :runtest cuckoo_table_builder_test.exe
call :runtest cuckoo_table_db_test.exe
call :runtest cuckoo_table_reader_test.exe
call :runtest dbformat_test.exe
call :runtest db_iter_test.exe
call :runtest db_test.exe
call :runtest deletefile_test.exe
call :runtest dynamic_bloom_test.exe
call :runtest env_test.exe
call :runtest fault_injection_test.exe
call :runtest filelock_test.exe
call :runtest filename_test.exe
call :runtest file_indexer_test.exe
call :runtest full_filter_block_test.exe
call :runtest histogram_test.exe
call :runtest listener_test.exe
call :runtest log_test.exe
call :runtest manual_compaction_test.exe
call :runtest memenv_test.exe
call :runtest merger_test.exe
call :runtest merge_test.exe
call :runtest mock_env_test.exe
call :runtest options_test.exe
call :runtest perf_context_test.exe
call :runtest plain_table_db_test.exe
call :runtest prefix_test.exe
call :runtest rate_limiter_test.exe
call :runtest redis_lists_test.exe
rem call :runtest signal_test.exe
call :runtest skiplist_test.exe
call :runtest slice_transform_test.exe
call :runtest sst_dump_test.exe
call :runtest stringappend_test.exe
call :runtest table_properties_collector_test.exe
call :runtest table_test.exe
call :runtest thread_list_test.exe
call :runtest thread_local_test.exe
call :runtest ttl_test.exe
call :runtest version_builder_test.exe
call :runtest version_edit_test.exe
call :runtest version_set_test.exe
call :runtest wal_manager_test.exe
call :runtest write_batch_test.exe
rem call :runtest write_batch_with_index_test.exe
call :runtest write_controller_test.exe
call :stat
goto :eof
:init
set tests=0
set passed=0
set failed=0
goto :eof
:runtest
set /A tests=%tests% + 1
echo|set /p=Running %1...
%1 > %1.log 2>&1
findstr /C:"PASSED" %1.log > nul 2>&1
IF ERRORLEVEL 1 (
findstr /C:"Passed all tests" %1.log > nul 2>&1
IF ERRORLEVEL 1 (
echo ***FAILED***
set /A failed=%failed% + 1
) ELSE (
echo OK
set /A passed=%passed% + 1
)
) ELSE (
echo OK
set /A passed=%passed% + 1
)
goto :eof
:stat
echo =================
echo Total tests : %tests%
echo Passed : %passed%
echo Failed : %failed%
goto :eof

2
db/c.cc
View File

@ -484,7 +484,7 @@ static bool SaveError(char** errptr, const Status& s) {
*errptr = strdup(s.ToString().c_str());
} else {
// TODO(sanjay): Merge with existing error?
// This is a bug if *errptr is not create by malloc()
// This is a bug if *errptr is not created by malloc()
free(*errptr);
*errptr = strdup(s.ToString().c_str());
}

3
db/file_indexer.h
View File

@ -12,6 +12,7 @@
#include <functional>
#include <limits>
#include <vector>
#include "port/port.h"
#include "util/arena.h"
#include "util/autovector.h"
@ -59,7 +60,7 @@ class FileIndexer {
enum {
// MSVC version 1800 still does not have constexpr for ::max()
kLevelMaxIndex = INT32_MAX
kLevelMaxIndex = rocksdb::port::LevelMaxIndex
};
private:

14
include/rocksdb/c.h
View File

@ -192,13 +192,13 @@ extern ROCKSDB_LIBRARY_API rocksdb_t* rocksdb_open_for_read_only_column_families
unsigned char error_if_log_file_exist,
char** errptr);
ROCKSDB_LIBRARY_API char** rocksdb_list_column_families(
extern ROCKSDB_LIBRARY_API char** rocksdb_list_column_families(
const rocksdb_options_t* options,
const char* name,
size_t* lencf,
char** errptr);
ROCKSDB_LIBRARY_API void rocksdb_list_column_families_destroy(char** list, size_t len);
extern ROCKSDB_LIBRARY_API void rocksdb_list_column_families_destroy(char** list, size_t len);
extern ROCKSDB_LIBRARY_API rocksdb_column_family_handle_t* rocksdb_create_column_family(
rocksdb_t* db,
@ -236,7 +236,7 @@ extern ROCKSDB_LIBRARY_API void rocksdb_delete(
const char* key, size_t keylen,
char** errptr);
void ROCKSDB_LIBRARY_API rocksdb_delete_cf(
extern ROCKSDB_LIBRARY_API void rocksdb_delete_cf(
rocksdb_t* db,
const rocksdb_writeoptions_t* options,
rocksdb_column_family_handle_t* column_family,
@ -467,16 +467,16 @@ extern ROCKSDB_LIBRARY_API void rocksdb_writebatch_delete_cf(
rocksdb_writebatch_t*,
rocksdb_column_family_handle_t* column_family,
const char* key, size_t klen);
ROCKSDB_LIBRARY_API void rocksdb_writebatch_deletev(
extern ROCKSDB_LIBRARY_API void rocksdb_writebatch_deletev(
rocksdb_writebatch_t* b,
int num_keys, const char* const* keys_list,
const size_t* keys_list_sizes);
ROCKSDB_LIBRARY_API void rocksdb_writebatch_deletev_cf(
extern ROCKSDB_LIBRARY_API void rocksdb_writebatch_deletev_cf(
rocksdb_writebatch_t* b,
rocksdb_column_family_handle_t* column_family,
int num_keys, const char* const* keys_list,
const size_t* keys_list_sizes);
ROCKSDB_LIBRARY_API extern void rocksdb_writebatch_put_log_data(
extern ROCKSDB_LIBRARY_API void rocksdb_writebatch_put_log_data(
rocksdb_writebatch_t*,
const char* blob, size_t len);
extern ROCKSDB_LIBRARY_API void rocksdb_writebatch_iterate(
@ -986,7 +986,7 @@ extern ROCKSDB_LIBRARY_API void rocksdb_get_options_from_string(
rocksdb_options_t* new_options,
char** errptr);
// refering to convention (3), this should be used by client
// referring to convention (3), this should be used by client
// to free memory that was malloc()ed
extern ROCKSDB_LIBRARY_API void rocksdb_free(
void* ptr);

20
include/rocksdb/slice.h
View File

@ -24,12 +24,6 @@
#include <stddef.h>
#include <string.h>
#include <string>
#include <stdio.h>
// Do not want to include the whole /port/port.h here for one define
#ifdef OS_WIN
# define snprintf _snprintf
#endif
namespace rocksdb {
@ -80,19 +74,7 @@ class Slice {
}
// Return a string that contains the copy of the referenced data.
std::string ToString(bool hex = false) const {
if (hex) {
std::string result;
char buf[10];
for (size_t i = 0; i < size_; i++) {
snprintf(buf, 10, "%02X", (unsigned char)data_[i]);
result += buf;
}
return result;
} else {
return std::string(data_, size_);
}
}
std::string ToString(bool hex = false) const;
// Three-way comparison. Returns value:
// < 0 iff "*this" < "b",

8
include/rocksdb/thread_status.h
View File

@ -32,15 +32,11 @@ namespace rocksdb {
// TODO(yhchiang): remove this function once c++14 is available
// as std::max will be able to cover this.
#ifndef OS_WIN
constexpr int constexpr_max(int a, int b) { return a > b ? a : b; }
#else
// Current MS compiler does not support constexpr
template<int A, int B>
struct constexpr_max {
static const int result = (A > B) ? A : B;
};
#endif
// A structure that describes the current status of a thread.
// The status of active threads can be fetched using
@ -100,11 +96,7 @@ struct ThreadStatus {
// The maximum number of properties of an operation.
// This number should be set to the biggest NUM_XXX_PROPERTIES.
static const int kNumOperationProperties =
#ifndef OS_WIN
constexpr_max(NUM_COMPACTION_PROPERTIES, NUM_FLUSH_PROPERTIES);
#else
constexpr_max<NUM_COMPACTION_PROPERTIES, NUM_FLUSH_PROPERTIES>::result;
#endif
// The type used to refer to a thread state.
// A state describes lower-level action of a thread

2
include/rocksdb/utilities/spatial_db.h
View File

@ -80,7 +80,7 @@ struct Variant {
const std::string& get_string() const { return *GetStringPtr(data_); }
bool operator==(const Variant& other) const;
bool operator!=(const Variant& rhs) const { return !(*this == rhs); }
bool operator!=(const Variant& other) const { return !(*this == other); }
private:

6
include/utilities/document_db.h
View File

@ -4,5 +4,9 @@
// of patent rights can be found in the PATENTS file in the same directory.
#pragma once
#warning This file was moved to rocksdb/utilities/document_db.h
#include "pragma_error.h"
ROCKSDB_WARNING("This file was moved to rocksdb/utilities/document_db.h")
#include "rocksdb/utilities/document_db.h"

6
include/utilities/geo_db.h
View File

@ -4,5 +4,9 @@
// of patent rights can be found in the PATENTS file in the same directory.
#pragma once
#warning This file was moved to rocksdb/utilities/geo_db.h
#include "pragma_error.h"
ROCKSDB_WARNING("This file was moved to rocksdb/utilities/geo_db.h")
#include "rocksdb/utilities/geo_db.h"

6
include/utilities/json_document.h
View File

@ -3,5 +3,9 @@
// 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.
#pragma once
#warning This file was moved to rocksdb/utilities/json_document.h
#include "pragma_error.h"
ROCKSDB_WARNING("This file was moved to rocksdb/utilities/json_document.h")
#include "rocksdb/utilities/json_document.h"

5
include/utilities/stackable_db.h
View File

@ -3,5 +3,8 @@
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#pragma once
#warning This file was moved to rocksdb/utilities/stackable_db.h
#include "pragma_error.h"
ROCKSDB_WARNING("This file was moved to rocksdb/utilities/stackable_db.h")
#include "rocksdb/utilities/stackable_db.h"

5
port/port_posix.h
View File

@ -71,9 +71,14 @@
#define fdatasync fsync
#endif
#include <limits>
namespace rocksdb {
namespace port {
// For use at db/file_indexer.h kLevelMaxIndex
const int LevelMaxIndex = std::numeric_limits<int32_t>::max();
static const bool kLittleEndian = PLATFORM_IS_LITTLE_ENDIAN;
#undef PLATFORM_IS_LITTLE_ENDIAN

2
port/sys_time.h
View File

@ -12,7 +12,7 @@
#ifndef STORAGE_LEVELDB_PORT_SYS_TIME_H_
#define STORAGE_LEVELDB_PORT_SYS_TIME_H_
#if defined(_WIN32) && defined(_MSC_VER)
#if defined(OS_WIN) && defined(_MSC_VER)
#include <time.h>

17
port/win/env_win.cc
View File

@ -229,10 +229,9 @@ size_t Roundup(size_t x, size_t y) {
}
// Can only truncate or reserve to a sector size aligned if
// used on files that are opened with Unbuffered I/O
// Normally it does not present a problem since in memory mapped files
// we do not disable buffering
// SetFileInformationByHandle() is capable of fast pre-allocates.
// However, this does not change the file end position unless the file is
// truncated and the pre-allocated space is not considered filled with zeros.
inline
Status fallocate(const std::string& filename, HANDLE hFile, uint64_t to_size) {
@ -394,7 +393,7 @@ class WinMmapReadableFile : public RandomAccessFile {
const size_t length_;
public:
// base[0,length-1] contains the mmapped contents of the file.
// mapped_region_[0,length-1] contains the mmapped contents of the file.
WinMmapReadableFile(const std::string &fileName, HANDLE hFile, HANDLE hMap, const void* mapped_region, size_t length)
: fileName_(fileName), hFile_(hFile), hMap_(hMap), mapped_region_(mapped_region), length_(length) {
@ -1523,7 +1522,7 @@ public:
NULL);
}
if (hFile == INVALID_HANDLE_VALUE) {
if (INVALID_HANDLE_VALUE == hFile) {
auto lastError = GetLastError();
s = IOErrorFromWindowsError("Failed to open NewSequentialFile" + fname, lastError);
} else {
@ -1565,7 +1564,7 @@ public:
/// Shared access is necessary for corruption test to pass
// almost all tests would work with a possible exception of fault_injection
HANDLE hFile;
HANDLE hFile = 0;
{
IOSTATS_TIMER_GUARD(open_nanos);
hFile = CreateFileA(
@ -1718,7 +1717,7 @@ public:
NULL);
}
if (hFile == INVALID_HANDLE_VALUE) {
if (INVALID_HANDLE_VALUE == hFile) {
auto lastError = GetLastError();
s = IOErrorFromWindowsError("Failed to Open/Create NewRandomRWFile" + fname, lastError);
}
@ -2018,7 +2017,7 @@ public:
NULL);
}
if (hFile == INVALID_HANDLE_VALUE) {
if (INVALID_HANDLE_VALUE == hFile) {
auto lastError = GetLastError();
s = IOErrorFromWindowsError("Failed to open LogFile" + fname, lastError);
} else {

22
port/win/port_win.h
View File

@ -62,7 +62,7 @@ typedef SSIZE_T ssize_t;
#endif
#ifdef SNAPPY
#include "snappy.h"
#include <snappy.h>
#endif
// Thread local storage on Linux
@ -80,6 +80,9 @@ namespace rocksdb {
namespace port
{
// For use at db/file_indexer.h kLevelMaxIndex
const int LevelMaxIndex = INT32_MAX;
const bool kLittleEndian = true;
class CondVar;
@ -87,8 +90,7 @@ class CondVar;
class Mutex
{
public:
/* implicit */
Mutex(bool adaptive = false);
/* implicit */ Mutex(bool adaptive = false);
~Mutex();
void Lock();
@ -97,8 +99,8 @@ public:
// this will assert if the mutex is not locked
// it does NOT verify that mutex is held by a calling thread
void AssertHeld();
std::unique_lock<std::mutex>& getLock()
{
std::unique_lock<std::mutex>& getLock() {
return lock;
}
@ -117,8 +119,6 @@ private:
class RWMutex
{
private:
SRWLOCK srwLock_;
public:
RWMutex() {
InitializeSRWLock(&srwLock_);
@ -140,12 +140,12 @@ public:
ReleaseSRWLockExclusive(&srwLock_);
}
void AssertHeld() {
//TODO: psrao - should be implemented
}
// Empty as in POSIX
void AssertHeld() { }
private:
SRWLOCK srwLock_;
// No copying allowed
RWMutex(const RWMutex&);
void operator=(const RWMutex&);
@ -520,7 +520,7 @@ int pthread_key_create(pthread_key_t *key, void(*destructor)(void*)) {
(void)destructor;
pthread_key_t k = TlsAlloc();
if (k == TLS_OUT_OF_INDEXES) {
if (TLS_OUT_OF_INDEXES == k) {
return ENOMEM;
}

6
port/win/win_logger.cc
View File

@ -24,8 +24,6 @@
namespace rocksdb {
//const int kDebugLogChunkSize = 128 * 1024;
WinLogger::WinLogger(uint64_t (*gettid)(), Env* env, FILE * file, const InfoLogLevel log_level)
: Logger(log_level),
gettid_(gettid),
@ -61,9 +59,11 @@ void WinLogger::Flush() {
}
void WinLogger::Logv(const char* format, va_list ap) {
const uint64_t thread_id = (*gettid_)();
IOSTATS_TIMER_GUARD(logger_nanos);
const uint64_t thread_id = (*gettid_)();
// We try twice: the first time with a fixed-size stack allocated buffer,
// and the second time with a much larger dynamically allocated buffer.
char buffer[500];

28
port/win/win_logger.h
View File

@ -23,21 +23,16 @@ class Env;
const int kDebugLogChunkSize = 128 * 1024;
class WinLogger : public rocksdb::Logger {
private:
FILE* file_;
uint64_t (*gettid_)(); // Return the thread id for the current thread
std::atomic_size_t log_size_;
std::atomic_uint_fast64_t last_flush_micros_;
Env* env_;
bool flush_pending_;
const static uint64_t flush_every_seconds_ = 5;
public:
WinLogger(uint64_t(*gettid)(), Env* env, FILE * file, const InfoLogLevel log_level = InfoLogLevel::ERROR_LEVEL);
WinLogger(uint64_t(*gettid)(), Env* env, FILE * file,
const InfoLogLevel log_level = InfoLogLevel::ERROR_LEVEL);
virtual ~WinLogger();
WinLogger(const WinLogger&) = delete;
WinLogger& operator=(const WinLogger&) = delete;
void close();
void Flush() override;
@ -47,6 +42,17 @@ public:
size_t GetLogFileSize() const override;
void DebugWriter(const char* str, int len);
private:
FILE* file_;
uint64_t(*gettid_)(); // Return the thread id for the current thread
std::atomic_size_t log_size_;
std::atomic_uint_fast64_t last_flush_micros_;
Env* env_;
bool flush_pending_;
const static uint64_t flush_every_seconds_ = 5;
};
} // namespace rocksdb

2
table/block_based_table_builder.cc
View File

@ -374,7 +374,7 @@ Slice CompressBlock(const Slice& raw,
// kBlockBasedTableMagicNumber was picked by running
// echo rocksdb.table.block_based | sha1sum
// and taking the leading 64 bits.
// Please note that kBlockBasedTableMagicNumber may also be accessed by
// Please note that kBlockBasedTableMagicNumber may also be accessed by other .cc files
// for that reason we declare it extern in the header but to get the space allocated
// it must be not extern in one place.
const uint64_t kBlockBasedTableMagicNumber = 0x88e241b785f4cff7ull;

5
third-party/fbson/FbsonStream.h vendored
View File

@ -30,6 +30,11 @@
#define __STDC_FORMAT_MACROS
#endif
#if defined OS_WIN && !defined snprintf
# define snprintf _snprintf
#endif
#include <inttypes.h>
#include <iostream>

9
util/arena.cc
View File

@ -17,6 +17,11 @@
namespace rocksdb {
// MSVC complains that it is already defined since it is static in the header.
#ifndef OS_WIN
const size_t Arena::kInlineSize;
#endif
const size_t Arena::kMinBlockSize = 4096;
const size_t Arena::kMaxBlockSize = 2 << 30;
static const int kAlignUnit = sizeof(void*);
@ -54,8 +59,8 @@ Arena::~Arena() {
for (const auto& block : blocks_) {
delete[] block;
}
// yuslepukhin: this needs to be addressed as it previously was under #ifdef
#ifndef OS_WIN
#ifdef MAP_HUGETLB
for (const auto& mmap_info : huge_blocks_) {
auto ret = munmap(mmap_info.addr_, mmap_info.length_);
if (ret != 0) {

1
util/autovector.h
View File

@ -240,7 +240,6 @@ class autovector {
}
void push_back(const T& item) {
//psrao: causes infinite recursion with VC
if (num_stack_items_ < kSize) {
values_[num_stack_items_++] = item;
}

3
util/dynamic_bloom.h
View File

@ -9,8 +9,7 @@
#include "rocksdb/slice.h"
#include <port/port.h>
#include "port/port.h"
#include <atomic>
#include <memory>

2
util/env.cc
View File

@ -10,7 +10,7 @@
#include "rocksdb/env.h"
#include <thread>
#include <port/sys_time.h>
#include "port/sys_time.h"
#include "rocksdb/options.h"
#include "util/arena.h"

4
util/log_buffer.cc
View File

@ -5,8 +5,8 @@
#include "util/log_buffer.h"
#include <port/sys_time.h>
#include <port/port.h>
#include "port/sys_time.h"
#include "port/port.h"
namespace rocksdb {

2
util/options_helper.cc
View File

@ -417,6 +417,8 @@ bool ParseColumnFamilyOption(const std::string& name, const std::string& value,
new_options->memtable_factory.reset(new_mem_factory);
} else if (name == "min_write_buffer_number_to_merge") {
new_options->min_write_buffer_number_to_merge = ParseInt(value);
} else if (name == "max_write_buffer_number_to_maintain") {
new_options->max_write_buffer_number_to_maintain = ParseInt(value);
} else if (name == "compression") {
new_options->compression = ParseCompressionType(value);
} else if (name == "compression_per_level") {

2
util/posix_logger.h
View File

@ -13,7 +13,7 @@
#pragma once
#include <algorithm>
#include <stdio.h>
#include <port/sys_time.h>
#include "port/sys_time.h"
#include <time.h>
#include <fcntl.h>
#ifdef OS_LINUX

23
util/slice.cc
View File

@ -11,6 +11,7 @@
#include "rocksdb/slice_transform.h"
#include "rocksdb/slice.h"
#include "util/string_util.h"
#include <stdio.h>
namespace rocksdb {
@ -93,6 +94,28 @@ class NoopTransform : public SliceTransform {
}
// Do not want to include the whole /port/port.h here for one define
#ifdef OS_WIN
# define snprintf _snprintf
#endif
// Return a string that contains the copy of the referenced data.
std::string Slice::ToString(bool hex) const {
std::string result; // RVO/NRVO/move
if (hex) {
char buf[10];
for (size_t i = 0; i < size_; i++) {
snprintf(buf, 10, "%02X", (unsigned char)data_[i]);
result += buf;
}
return result;
} else {
result.assign(data_, size_);
return result;
}
}
const SliceTransform* NewFixedPrefixTransform(size_t prefix_len) {
return new FixedPrefixTransform(prefix_len);
}