Merge pull request 'feat/update_config' (#10) from feat/update_config into master

Reviewed-on: #10

.clang-format

@@ -0,0 +1,78 @@
+# Generated from CLion C/C++ Code Style settings
+BinPackParameters: false
+BasedOnStyle: LLVM
+AccessModifierOffset: -4
+AlignArrayOfStructures: Left
+AlignAfterOpenBracket: Align
+AlignConsecutiveAssignments:
+  Enabled: true
+  AcrossEmptyLines: true
+  AcrossComments: false
+
+AlignOperands: DontAlign
+AllowAllArgumentsOnNextLine: false
+AllowAllConstructorInitializersOnNextLine: false
+AllowAllParametersOfDeclarationOnNextLine: false
+AllowShortBlocksOnASingleLine: Always
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: All
+AllowShortIfStatementsOnASingleLine: true
+AllowShortLambdasOnASingleLine: All
+AllowShortLoopsOnASingleLine: true
+AlwaysBreakTemplateDeclarations: Yes
+# 函数和返回类型分两行，方便阅读
+AlwaysBreakAfterReturnType: TopLevelDefinitions
+BreakBeforeBraces: Custom
+BraceWrapping:
+  AfterCaseLabel: false
+  AfterClass: false
+  AfterControlStatement: Never
+  AfterEnum: false
+  AfterFunction: true
+  AfterNamespace: false
+  AfterUnion: false
+  BeforeCatch: false
+  BeforeElse: false
+  IndentBraces: false
+  SplitEmptyFunction: false
+  SplitEmptyRecord: true
+BreakBeforeBinaryOperators: NonAssignment
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializers: BeforeColon
+ConstructorInitializerAllOnOneLineOrOnePerLine: true
+BreakInheritanceList: BeforeColon
+ColumnLimit: 120
+CompactNamespaces: false
+ContinuationIndentWidth: 4
+EmptyLineBeforeAccessModifier: LogicalBlock
+SeparateDefinitionBlocks: Always
+IndentCaseLabels: false
+IndentPPDirectives: None
+IndentWidth: 4
+KeepEmptyLinesAtTheStartOfBlocks: true
+MaxEmptyLinesToKeep: 1
+NamespaceIndentation: None
+ObjCSpaceAfterProperty: false
+ObjCSpaceBeforeProtocolList: false
+PointerAlignment: Right
+ReflowComments: false
+SortIncludes: CaseSensitive
+SpaceAfterCStyleCast: true
+SpaceAfterLogicalNot: false
+SpaceAfterTemplateKeyword: false
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeCpp11BracedList: false
+SpaceBeforeCtorInitializerColon: true
+SpaceBeforeInheritanceColon: true
+SpaceBeforeParens: ControlStatements
+SpaceBeforeRangeBasedForLoopColon: true
+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 0
+SpacesInAngles: false
+SpacesInCStyleCastParentheses: false
+SpacesInContainerLiterals: false
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+TabWidth: 4
+UseTab: Never
+PenaltyIndentedWhitespace: 1

.gitea/workflows/android.yml

@@ -36,6 +36,10 @@ jobs:
     - uses: actions/checkout@v4
       with: 
         submodules: true
+    - name: install-tools
+      run: |
+        apt-get update -y
+        apt-get install -y cmake make
 
     - name: armeabi-v7a
       run: |

.gitea/workflows/linux-aarch64-gcc.yml

@@ -41,7 +41,7 @@ jobs:
       - name: install-tools
         run: |
           sudo apt-get update -y
-          sudo apt-get install -y g++-aarch64-linux-gnu qemu-user-binfmt
+          sudo apt-get install -y cmake make g++-aarch64-linux-gnu qemu-user-binfmt
       - name: configure
         run: |
           mkdir build && cd build

.gitea/workflows/linux-arm-gcc.yml

@@ -36,10 +36,10 @@ jobs:
         build_type: ["Debug", "Release"]
     steps:
       - uses: actions/checkout@v4
-      # - name: install-tools
-      #   run: |
-      #     sudo apt-get update -y
-      #     sudo apt-get install -y g++-arm-linux-gnueabi qemu-user-binfmt
+      - name: install-tools
+        run: |
+          sudo apt-get update -y
+          sudo apt-get install -y cmake g++-arm-linux-gnueabi qemu-user-binfmt
       - name: configure
         run: |
           mkdir build && cd build
@@ -51,8 +51,8 @@ jobs:
       - name: test
         run: |
           cd build
-          #sudo ln -sf /usr/arm-linux-gnueabi/lib/ld-linux.so.3 /lib/ld-linux.so.3
-          #export LD_LIBRARY_PATH=/usr/arm-linux-gnueabi/lib
+          sudo ln -sf /usr/arm-linux-gnueabi/lib/ld-linux.so.3 /lib/ld-linux.so.3
+          export LD_LIBRARY_PATH=/usr/arm-linux-gnueabi/lib
           ctest --output-on-failure -j $(nproc)
 
   linux-gcc-armhf:

.gitea/workflows/linux-mips-gcc.yml

@@ -38,7 +38,7 @@ jobs:
       - name: install-tools
         run: |
           sudo apt-get update -y
-          sudo apt-get install -y g++-mipsel-linux-gnu qemu-user-binfmt
+          sudo apt-get install -y cmake make g++-mipsel-linux-gnu qemu-user-binfmt
       - name: configure
         run: |
           mkdir build && cd build

.gitea/workflows/linux-mips64-gcc.yml

@@ -39,7 +39,7 @@ jobs:
       - name: install-tools
         run: |
           sudo apt-get update -y
-          sudo apt-get install -y g++-mips64el-linux-gnuabi64 qemu-user-binfmt
+          sudo apt-get install -y cmake make g++-mips64el-linux-gnuabi64 qemu-user-binfmt
       - name: configure
         run: |
           mkdir build && cd build

.gitea/workflows/linux-riscv64-gcc.yml

@@ -40,7 +40,7 @@ jobs:
       - name: install-tools
         run: |
           sudo apt-get update -y
-          sudo apt-get install -y g++-riscv64-linux-gnu qemu-user-binfmt
+          sudo apt-get install -y cmake make g++-riscv64-linux-gnu qemu-user-binfmt
       - name: configure
         run: |
           mkdir build && cd build

.gitea/workflows/linux-x64-clang.yml

@@ -32,7 +32,7 @@ jobs:
       - name: install-tools
         run: |
           sudo apt-get update -y
-          sudo apt-get install -y cmake make
+          sudo apt-get install -y cmake make clang-tools
       - name: configure
         env: 
           CC: clang

.gitea/workflows/linux-x86-gcc.yml

@@ -38,7 +38,7 @@ jobs:
       - name: install-tools
         run: |
           sudo apt-get update -y
-          sudo apt-get install -y gcc-multilib g++-multilib
+          sudo apt-get install -y cmake make gcc-multilib g++-multilib
       - name: configure
         run: |
           mkdir build && cd build

.woodpecker/linux-aarch64-gcc.yml

@@ -1,37 +0,0 @@
-when:
-  - event: 
-    - push
-    - pull_request 
-  - path:
-      include:
-        - ".woodpecker/linux-aarch64-gcc.yml"
-        - "cmake/**"
-        - "third_party/**"
-        - "tile/**"
-        - "CMakeLists.txt"
-
-matrix:
-  BUILD_TYPE:
-    - Debug
-    - Release
-
-steps:
-  - name: linux-aarch64-gcc-build
-    image: art.uocat.com/docker/tqcq/cross:v1.0.1
-    commands:
-      - mkdir build 
-      - cmake -S. -Bbuild -DCMAKE_BUILD_TYPE=${BUILD_TYPE} -DTILE_BUILD_BENCHMARKS=ON -DTILE_BUILD_TESTS=ON  -DCMAKE_TOOLCHAIN_FILE=./toolchains/aarch64-linux-gnu.toolchain.cmake
-      - cmake --build build -j $(nproc)
-
-  - name: linux-aarch64-gcc-test
-    image: art.uocat.com/docker/tqcq/cross:v1.0.1
-    commands:
-      - cd build
-      - ctest --output-on-failure -j $(nproc)
-
-  # - name: linux-aarch64-gcc-benchmark
-  #   image: art.uocat.com/docker/tqcq/cross:v1.0.1
-  #   commands:
-  #     - ./build/bin/tile_bm_all
-
-

.woodpecker/linux-arm-gcc.yml.stop

@@ -1,30 +0,0 @@
-when:
-  - event:  []
-    #- push
-    #- pull_request 
-
-matrix:
-  BUILD_TYPE:
-    - Debug
-    - Release
-
-steps:
-  - name: linux-arm-gcc-build
-    image: art.uocat.com/docker/tqcq/cross:v1.0.1
-    commands:
-      - mkdir build 
-      - cmake -S. -Bbuild -DCMAKE_BUILD_TYPE=${BUILD_TYPE} -DTILE_BUILD_BENCHMARKS=ON -DTILE_BUILD_TESTS=ON  -DCMAKE_TOOLCHAIN_FILE=./toolchains/arm-linux-gnueabihf.toolchain.cmake
-      - cmake --build build -j $(nproc)
-
-  - name: linux-arm-gcc-test
-    image: art.uocat.com/docker/tqcq/cross:v1.0.1
-    commands:
-      - cd build
-      - ctest --output-on-failure -j $(nproc)
-
-  # - name: linux-arm-gcc-benchmark
-  #   image: art.uocat.com/docker/tqcq/cross:v1.0.1
-  #   commands:
-  #     - ./build/bin/tile_bm_all
-
-

.woodpecker/linux-x64-gcc.yml

@@ -1,37 +0,0 @@
-when:
-  - event: 
-    - push
-    - pull_request 
-  - path:
-      include:
-        - ".woodpecker/linux-x64-gcc.yml"
-        - "cmake/**"
-        - "third_party/**"
-        - "tile/**"
-        - "CMakeLists.txt"
-
-matrix:
-  BUILD_TYPE:
-    - Debug
-    - Release
-
-steps:
-  - name: linux-x64-gcc-build
-    image: art.uocat.com/docker/tqcq/cross:v1.0.1
-    commands:
-      - mkdir build 
-      - cmake -S. -Bbuild -DCMAKE_BUILD_TYPE=${BUILD_TYPE} -DTILE_BUILD_BENCHMARKS=ON -DTILE_BUILD_TESTS=ON
-      - cmake --build build -j $(nproc)
-
-  - name: linux-x64-gcc-test
-    image: art.uocat.com/docker/tqcq/cross:v1.0.1
-    commands:
-      - cd build
-      - ctest --output-on-failure -j $(nproc)
-
-  - name: linux-x64-gcc-benchmark
-    image: art.uocat.com/docker/tqcq/cross:v1.0.1
-    commands:
-      - ./build/bin/tile_bm_all
-
-

.woodpecker/linux-x86-gcc.yml.stop

@@ -1,36 +0,0 @@
-when:
-  - event: 
-    - push
-    - pull_request 
-  - path:
-      include:
-        - ".woodpecker/linux-x86-gcc.yml"
-        - "cmake/**"
-        - "third_party/**"
-        - "tile/**"
-        - "CMakeLists.txt"
-matrix:
-  BUILD_TYPE:
-    - Debug
-    - Release
-
-steps:
-  - name: linux-x86-gcc-build
-    image: art.uocat.com/docker/tqcq/cross:v1.0.1
-    commands:
-      - mkdir build 
-      - cmake -S. -Bbuild -DCMAKE_BUILD_TYPE=${BUILD_TYPE} -DTILE_BUILD_BENCHMARKS=ON -DTILE_BUILD_TESTS=ON  -DCMAKE_TOOLCHAIN_FILE=./toolchains/host.gcc-m32.toolchain.cmake
-      - cmake --build build -j $(nproc)
-
-  - name: linux-x86-gcc-test
-    image: art.uocat.com/docker/tqcq/cross:v1.0.1
-    commands:
-      - cd build
-      - ctest --output-on-failure -j $(nproc)
-
-  - name: linux-x86-gcc-benchmark
-    image: art.uocat.com/docker/tqcq/cross:v1.0.1
-    commands:
-      - ./build/bin/tile_bm_all
-
-

CMakeLists.txt

@@ -19,11 +19,14 @@ set(CMAKE_CXX_EXTENSIONS OFF)
 
 set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 
+# add static libgcc and libstdc++ for static linking
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -static-libgcc -static-libstdc++")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static-libgcc -static-libstdc++")
+
 option(TILE_BUILD_TESTS "Build tests" OFF)
 option(TILE_BUILD_BENCHMARKS "Build tests" OFF)
 option(TILE_WITH_OPENSSL "Build with openssl" OFF)
 option(TILE_BUILD_SHARED "Build shared library" ON)
-option(TILE_BUILD_STATIC "Build static library" ON)
 
 if(CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
   set(TILE_BUILD_TESTS ON)
@@ -34,34 +37,34 @@ if(NOT CMAKE_BUILD_TYPE)
     set(CMAKE_BUILD_TYPE "Release")
 endif()
 
-if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
-  # set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -gz")
-  # set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -gz")
-  # set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static") set(CMAKE_C_FLAGS
-  # "${CMAKE_CXX_FLAGS} -static") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}
-  # -fsanitize=address ") set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=address
-  # ")
-
-  set(WHOLE_ARCHIVE_PREFIX "-Wl,-force_load")
-  # set(NO_WHOLE_ARCHIVE_PREFIX "")
-elseif(CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
-  # set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -gz")
-  # set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -gz")
-  # set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static") set(CMAKE_C_FLAGS
-  # "${CMAKE_CXX_FLAGS} -static")
-
-  set(WHOLE_ARCHIVE_PREFIX "-Wl,-force_load,")
-  # set(NO_WHOLE_ARCHIVE_PREFIX "")
-elseif(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -gz")
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -gz")
-  # set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static-libgcc -static-libstdc++")
-  # set(CMAKE_C_FLAGS "${CMAKE_CXX_FLAGS} -static-libgcc -static-libstdc++")
-
-  set(STATIC_BINARY_FLAGS "-static-libgcc -static-libstdc++")
-  set(WHOLE_ARCHIVE_PREFIX "-Wl,--whole-archive")
-  set(WHOLE_ARCHIVE_SUFFIX "-Wl,--no-whole-archive")
-endif()
+# if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+#   # set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -gz")
+#   # set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -gz")
+#   # set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static") set(CMAKE_C_FLAGS
+#   # "${CMAKE_CXX_FLAGS} -static") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}
+#   # -fsanitize=address ") set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=address
+#   # ")
+#
+#   set(WHOLE_ARCHIVE_PREFIX "-Wl,-force_load")
+#   # set(NO_WHOLE_ARCHIVE_PREFIX "")
+# elseif(CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
+#   # set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -gz")
+#   # set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -gz")
+#   # set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static") set(CMAKE_C_FLAGS
+#   # "${CMAKE_CXX_FLAGS} -static")
+#
+#   set(WHOLE_ARCHIVE_PREFIX "-Wl,-force_load,")
+#   # set(NO_WHOLE_ARCHIVE_PREFIX "")
+# elseif(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+#   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -gz")
+#   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -gz")
+#   # set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static-libgcc -static-libstdc++")
+#   # set(CMAKE_C_FLAGS "${CMAKE_CXX_FLAGS} -static-libgcc -static-libstdc++")
+#
+#   set(STATIC_BINARY_FLAGS "-static-libgcc -static-libstdc++")
+#   set(WHOLE_ARCHIVE_PREFIX "-Wl,--whole-archive")
+#   set(WHOLE_ARCHIVE_SUFFIX "-Wl,--no-whole-archive")
+# endif()
 
 # extern int getifaddrs(struct ifaddrs **ifap); extern void freeifaddrs(struct
 # ifaddrs *ifa);
@@ -71,11 +74,11 @@ include(cmake/BuildInfo.cmake)
 check_symbol_exists("getifaddrs" "ifaddrs.h" TILE_HAVE_GETIFADDRS)
 check_symbol_exists("freeifaddrs" "ifaddrs.h" TILE_HAVE_FREEIFADDRS)
 
-find_package(Git REQUIRED)
-
-get_git_commit_hash(GIT_COMMIT_HASH)
-get_git_commit_date(GIT_COMMIT_DATE)
-get_git_commit_subject(GIT_COMMIT_SUBJECT)
+# find_package(Git REQUIRED)
+#
+# get_git_commit_hash(GIT_COMMIT_HASH)
+# get_git_commit_date(GIT_COMMIT_DATE)
+# get_git_commit_subject(GIT_COMMIT_SUBJECT)
 
 set(THIRD_PARTY_INCLUDE_DIRS
     # "third_party/json" "third_party/inja" 
@@ -211,16 +214,22 @@ set(TILE_SRCS
     "tile/rpc/protocol/http/buffer_io.cc"
     "tile/rpc/protocol/message.cc"
     # "tile/rpc/server.cc"
-    "tile/base/config/config.cc"
-    "tile/base/config/ini_file_config.cc"
-    "tile/base/config/layered_config.cc"
+    "tile/base/config/configuration.cc"
+    "tile/base/config/ini_file_configuration.cc"
+    "tile/base/config/json_configuration.cc"
+    "tile/base/config/layered_configuration.cc"
+    "tile/base/config/toml_configuration.cc"
 )
 
 if((NOT TILE_HAVE_GETIFADDRS) OR (NOT TILE_HAVE_FREEIFADDRS))
   list(APPEND TILE_SRCS "tile/base/net/detail/android/ifaddrs.c")
 endif()
 
-add_library(tile SHARED ${TILE_SRCS})
+if (TILE_BUILD_SHARED)
+    add_library(tile SHARED ${TILE_SRCS})
+else()
+    add_library(tile STATIC ${TILE_SRCS})
+endif()
 set_target_properties(tile PROPERTIES VERSION ${PROJECT_VERSION}
 target_precompile_headers(tile PUBLIC inja/inja.h)
 target_precompile_headers(tile PUBLIC inja/string_view.h)
@@ -238,6 +247,7 @@ target_include_directories(
          "${CMAKE_CURRENT_SOURCE_DIR}"
          ${THIRD_PARTY_INCLUDE_DIRS}
          RPIVATE
+         "${CMAKE_CURRENT_SOURCE_DIR}/third_party/header_only/"
          "${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include")
 
 target_link_libraries(

third_party/README.md

@@ -0,0 +1,3 @@
+# Library
+
+- [toml11](https://github.com/ToruNiina/toml11/archive/refs/tags/v4.2.0.tar.gz)

third_party/curl/CMakeLists.txt

@@ -107,7 +107,7 @@ if(WIN32)
     endif()
   endif()
 endif()
-option(CURL_LTO "Turn on compiler Link Time Optimizations" ON)
+option(CURL_LTO "Turn on compiler Link Time Optimizations" OFF)
 
 cmake_dependent_option(ENABLE_THREADED_RESOLVER "Set to ON to enable threaded DNS lookup"
         ON "NOT ENABLE_ARES"

tile/base/align.h

@@ -15,19 +15,19 @@ constexpr std::size_t max_align_v = alignof(max_align_t);
 // @sa: https://github.com/facebook/folly/blob/master/folly/lang/Align.h
 //
 // Update at 20201124: Well, AMD's Zen 3 does the same.
-constexpr std::size_t hardware_destructive_interference_size = 128;
+constexpr std::size_t hardware_destructive_interference_size  = 128;
 constexpr std::size_t hardware_constructive_interference_size = 64;
 
 #elif defined(__powerpc64__)
 
 // These values are read from
 // `/sys/devices/system/cpu/cpu0/cache/index*/coherency_line_size`
-constexpr std::size_t hardware_destructive_interference_size = 128;
+constexpr std::size_t hardware_destructive_interference_size  = 128;
 constexpr std::size_t hardware_constructive_interference_size = 128;
 
 #elif defined(__ARM_ARCH_5T__)
 
-constexpr std::size_t hardware_destructive_interference_size = 32;
+constexpr std::size_t hardware_destructive_interference_size  = 32;
 constexpr std::size_t hardware_constructive_interference_size = 32;
 
 #elif defined(__arm__)
@@ -36,7 +36,7 @@ constexpr std::size_t hardware_constructive_interference_size = 32;
 // are even implementations with cache line sizes configurable at boot
 // time.
 
-constexpr std::size_t hardware_destructive_interference_size = 64;
+constexpr std::size_t hardware_destructive_interference_size  = 64;
 constexpr std::size_t hardware_constructive_interference_size = 64;
 
 #elif defined(__aarch64__)
@@ -47,13 +47,13 @@ constexpr std::size_t hardware_constructive_interference_size = 64;
 // Let's ignore those CPUs for now.
 //
 // @sa: https://www.mono-project.com/news/2016/09/12/arm64-icache/
-constexpr std::size_t hardware_destructive_interference_size = 64;
+constexpr std::size_t hardware_destructive_interference_size  = 64;
 constexpr std::size_t hardware_constructive_interference_size = 64;
 
 #else
 
 constexpr std::size_t hardware_constructive_interference_size = max_align_v;
-constexpr std::size_t hardware_destructive_interference_size = max_align_v;
+constexpr std::size_t hardware_destructive_interference_size  = max_align_v;
 // #error Unsupported architecture.
 // #pragma message("Unsupported architecture, use max_align_v")
 
@@ -62,6 +62,6 @@ static_assert(hardware_constructive_interference_size >= max_align_v,
               "hardware constructive interference size is too small");
 static_assert(hardware_destructive_interference_size >= max_align_v,
               "hardware destructive interference size is too small");
-} // namespace tile
+}// namespace tile
 
-#endif // _TILE_BASE_ALIGN_H
+#endif// _TILE_BASE_ALIGN_H

tile/base/buffer.cc

@@ -9,205 +9,214 @@
 
 namespace tile {
 namespace {
-template <typename T> class OwningBufferBlock : public PolymorphicBufferBlock {
+template<typename T>
+class OwningBufferBlock : public PolymorphicBufferBlock {
 public:
-  explicit OwningBufferBlock(T storage) : storage_(std::move(storage)) {}
-  const char *data() const noexcept override {
-    return reinterpret_cast<const char *>(storage_.data());
-  }
+    explicit OwningBufferBlock(T storage) : storage_(std::move(storage)) {}
 
-  std::size_t size() const noexcept override { return storage_.size(); }
+    const char *data() const noexcept override { return reinterpret_cast<const char *>(storage_.data()); }
+
+    std::size_t size() const noexcept override { return storage_.size(); }
 
 private:
-  T storage_;
+    T storage_;
 };
-} // namespace
+}// namespace
 
 namespace detail {
-void FlattenToSlowSlow(const NoncontiguousBuffer &nb, void *buffer,
-                       std::size_t size) {
-  TILE_CHECK_GT(nb.ByteSize(), size, "No enough data");
-  std::size_t copied = 0;
-  for (auto iter = nb.begin(); iter != nb.end() && copied != size; ++iter) {
-    auto len = std::min(size - copied, iter->size());
-    memcpy(reinterpret_cast<char *>(buffer) + copied, iter->data(), len);
-    copied += len;
-  }
+void
+FlattenToSlowSlow(const NoncontiguousBuffer &nb, void *buffer, std::size_t size)
+{
+    TILE_CHECK_GT(nb.ByteSize(), size, "No enough data");
+    std::size_t copied = 0;
+    for (auto iter = nb.begin(); iter != nb.end() && copied != size; ++iter) {
+        auto len = std::min(size - copied, iter->size());
+        memcpy(reinterpret_cast<char *>(buffer) + copied, iter->data(), len);
+        copied += len;
+    }
 }
-} // namespace detail
+}// namespace detail
 
-NoncontiguousBuffer::NoncontiguousBuffer(const NoncontiguousBuffer &other)
-    : byte_size_(other.byte_size_) {
-  for (auto &&e : other.buffers_) {
+NoncontiguousBuffer::NoncontiguousBuffer(const NoncontiguousBuffer &other) : byte_size_(other.byte_size_)
+{
+    for (auto &&e : other.buffers_) {
 
-    auto b = object_pool::Get<NoncontiguousBuffer::buffer_t>().Leak();
-    *b = e;
-    buffers_.push_back(std::move(b));
-  }
+        auto b = object_pool::Get<NoncontiguousBuffer::buffer_t>().Leak();
+        *b     = e;
+        buffers_.push_back(std::move(b));
+    }
 }
 
 NoncontiguousBuffer &
-NoncontiguousBuffer::operator=(const NoncontiguousBuffer &other) {
-  if (TILE_UNLIKELY(&other == this)) {
+NoncontiguousBuffer::operator=(const NoncontiguousBuffer &other)
+{
+    if (TILE_UNLIKELY(&other == this)) { return *this; }
+
+    Clear();
+    byte_size_ = other.byte_size_;
+    for (auto &&e : other.buffers_) {
+
+        auto b = object_pool::Get<NoncontiguousBuffer::buffer_t>().Leak();
+        *b     = e;
+        buffers_.push_back(std::move(b));
+    }
     return *this;
-  }
-
-  Clear();
-  byte_size_ = other.byte_size_;
-  for (auto &&e : other.buffers_) {
-
-    auto b = object_pool::Get<NoncontiguousBuffer::buffer_t>().Leak();
-    *b = e;
-    buffers_.push_back(std::move(b));
-  }
-  return *this;
 }
 
-void NoncontiguousBuffer::SkipSlow(std::size_t bytes) noexcept {
-  TILE_CHECK_LE(bytes, byte_size_, "Skip bytes exceed buffer size");
-  byte_size_ -= bytes;
+void
+NoncontiguousBuffer::SkipSlow(std::size_t bytes) noexcept
+{
+    TILE_CHECK_LE(bytes, byte_size_, "Skip bytes exceed buffer size");
+    byte_size_ -= bytes;
 
-  while (bytes) {
-    auto &&first = buffers_.front();
-    auto min_size = std::min(bytes, first.size());
-    if (min_size == first.size()) {
-      object_pool::Put<buffer_t>(buffers_.pop_front());
-    } else {
-      TILE_DCHECK_LT(min_size, first.size());
-      first.Skip(min_size);
+    while (bytes) {
+        auto &&first  = buffers_.front();
+        auto min_size = std::min(bytes, first.size());
+        if (min_size == first.size()) {
+            object_pool::Put<buffer_t>(buffers_.pop_front());
+        } else {
+            TILE_DCHECK_LT(min_size, first.size());
+            first.Skip(min_size);
+        }
+        bytes -= min_size;
     }
-    bytes -= min_size;
-  }
 }
 
-void NoncontiguousBuffer::ClearSlow() noexcept {
-  byte_size_ = 0;
-  while (!buffers_.empty()) {
-    object_pool::Put<buffer_t>(buffers_.pop_front());
-  }
+void
+NoncontiguousBuffer::ClearSlow() noexcept
+{
+    byte_size_ = 0;
+    while (!buffers_.empty()) { object_pool::Put<buffer_t>(buffers_.pop_front()); }
 }
 
-void NoncontiguousBufferBuilder::InitializeNextBlock() {
-  if (current_) {
-    TILE_CHECK(SizeAvailable(),
-               "You should flush current block by `FlushCurrentBlock()`");
-    return;
-  }
-
-  current_ = MakeNativeBufferBlock();
-  used_ = 0;
-}
-
-void NoncontiguousBufferBuilder::FlushCurrentBlock() {
-  if (!used_) {
-    // current block is empty
-    return;
-  }
-
-  nb_.Append(PolymorphicBuffer(std::move(current_), 0, used_));
-  used_ = 0;
-  current_ = nullptr;
-}
-
-void NoncontiguousBufferBuilder::AppendSlow(const void *ptr,
-                                            std::size_t length) {
-  while (length) {
-    auto copying = std::min(length, SizeAvailable());
-    memcpy(data(), ptr, copying);
-    MarkWritten(copying);
-    ptr = static_cast<const char *>(ptr) + copying;
-    length -= copying;
-  }
-}
-
-void NoncontiguousBufferBuilder::AppendCopy(const NoncontiguousBuffer &buffer) {
-  for (auto &&e : buffer) {
-    Append(e.data(), e.size());
-  }
-}
-
-NoncontiguousBuffer CreateBufferSlow(Slice s) {
-  NoncontiguousBufferBuilder nbb;
-  nbb.Append(s);
-  return nbb.DestructiveGet();
-}
-NoncontiguousBuffer CreateBufferSlow(const void *ptr, std::size_t size) {
-  NoncontiguousBufferBuilder nbb;
-  nbb.Append(ptr, size);
-  return nbb.DestructiveGet();
-}
-
-std::string FlattenSlow(const NoncontiguousBuffer &nb, std::size_t max_bytes) {
-  max_bytes = std::min(max_bytes, nb.ByteSize());
-  std::string rc;
-  std::size_t left = max_bytes;
-  rc.reserve(max_bytes);
-  for (auto iter = nb.begin(); iter != nb.end() && left; ++iter) {
-    auto len = std::min(left, iter->size());
-    rc.append(iter->data(), len);
-    left -= len;
-  }
-  return rc;
-}
-
-std::string FlattenSlowUntil(const NoncontiguousBuffer &nb, Slice delim,
-                             std::size_t max_bytes) {
-  if (nb.Empty()) {
-    return {};
-  }
-
-  {
-    Slice current(nb.FirstContiguous().data(), nb.FirstContiguous().size());
-    auto pos = current.find(delim);
-    if (pos != Slice::npos) {
-      auto expected_bytes = std::min(pos + delim.size(), max_bytes);
-      return std::string(nb.FirstContiguous().data(),
-                         nb.FirstContiguous().data() + expected_bytes);
+void
+NoncontiguousBufferBuilder::InitializeNextBlock()
+{
+    if (current_) {
+        TILE_CHECK(SizeAvailable(), "You should flush current block by `FlushCurrentBlock()`");
+        return;
     }
-  }
 
-  std::string rc;
-  for (auto iter = nb.begin(); iter != nb.end() && rc.size() < max_bytes;
-       ++iter) {
-    auto old_len = rc.size();
-    rc.append(iter->data(), iter->size());
-    // find delim
+    current_ = MakeNativeBufferBlock();
+    used_    = 0;
+}
+
+void
+NoncontiguousBufferBuilder::FlushCurrentBlock()
+{
+    if (!used_) {
+        // current block is empty
+        return;
+    }
+
+    nb_.Append(PolymorphicBuffer(std::move(current_), 0, used_));
+    used_    = 0;
+    current_ = nullptr;
+}
+
+void
+NoncontiguousBufferBuilder::AppendSlow(const void *ptr, std::size_t length)
+{
+    while (length) {
+        auto copying = std::min(length, SizeAvailable());
+        memcpy(data(), ptr, copying);
+        MarkWritten(copying);
+        ptr = static_cast<const char *>(ptr) + copying;
+        length -= copying;
+    }
+}
+
+void
+NoncontiguousBufferBuilder::AppendCopy(const NoncontiguousBuffer &buffer)
+{
+    for (auto &&e : buffer) { Append(e.data(), e.size()); }
+}
+
+NoncontiguousBuffer
+CreateBufferSlow(Slice s)
+{
+    NoncontiguousBufferBuilder nbb;
+    nbb.Append(s);
+    return nbb.DestructiveGet();
+}
+
+NoncontiguousBuffer
+CreateBufferSlow(const void *ptr, std::size_t size)
+{
+    NoncontiguousBufferBuilder nbb;
+    nbb.Append(ptr, size);
+    return nbb.DestructiveGet();
+}
+
+std::string
+FlattenSlow(const NoncontiguousBuffer &nb, std::size_t max_bytes)
+{
+    max_bytes = std::min(max_bytes, nb.ByteSize());
+    std::string rc;
+    std::size_t left = max_bytes;
+    rc.reserve(max_bytes);
+    for (auto iter = nb.begin(); iter != nb.end() && left; ++iter) {
+        auto len = std::min(left, iter->size());
+        rc.append(iter->data(), len);
+        left -= len;
+    }
+    return rc;
+}
+
+std::string
+FlattenSlowUntil(const NoncontiguousBuffer &nb, Slice delim, std::size_t max_bytes)
+{
+    if (nb.Empty()) { return {}; }
+
     {
-      // Avoiding the use of find_last_of
-      auto pos = rc.find(delim, old_len - std::min(old_len, delim.size()));
-      if (pos != Slice::npos) {
-        rc.erase(rc.begin() + pos + delim.size(), rc.end());
-        break;
-      }
+        Slice current(nb.FirstContiguous().data(), nb.FirstContiguous().size());
+        auto pos = current.find(delim);
+        if (pos != Slice::npos) {
+            auto expected_bytes = std::min(pos + delim.size(), max_bytes);
+            return std::string(nb.FirstContiguous().data(), nb.FirstContiguous().data() + expected_bytes);
+        }
     }
-  }
-  if (rc.size() > max_bytes) {
-    rc.erase(rc.begin() + max_bytes, rc.end());
-  }
-  return rc;
+
+    std::string rc;
+    for (auto iter = nb.begin(); iter != nb.end() && rc.size() < max_bytes; ++iter) {
+        auto old_len = rc.size();
+        rc.append(iter->data(), iter->size());
+        // find delim
+        {
+            // Avoiding the use of find_last_of
+            auto pos = rc.find(delim, old_len - std::min(old_len, delim.size()));
+            if (pos != Slice::npos) {
+                rc.erase(rc.begin() + pos + delim.size(), rc.end());
+                break;
+            }
+        }
+    }
+    if (rc.size() > max_bytes) { rc.erase(rc.begin() + max_bytes, rc.end()); }
+    return rc;
 }
 
-PolymorphicBuffer MakeReferencingBuffer(const void *ptr, std::size_t size) {
-  return MakeReferencingBuffer(ptr, size, [] {});
+PolymorphicBuffer
+MakeReferencingBuffer(const void *ptr, std::size_t size)
+{
+    return MakeReferencingBuffer(ptr, size, [] {});
 }
 
-PolymorphicBuffer MakeForeignBuffer(std::string buffer) {
-  auto size = buffer.size();
-  return PolymorphicBuffer(
-      MakeRefCounted<OwningBufferBlock<std::string>>(std::move(buffer)), 0,
-      size);
+PolymorphicBuffer
+MakeForeignBuffer(std::string buffer)
+{
+    auto size = buffer.size();
+    return PolymorphicBuffer(MakeRefCounted<OwningBufferBlock<std::string>>(std::move(buffer)), 0, size);
 }
 
-template <typename T>
-PolymorphicBuffer MakeForeignBuffer(std::vector<T> buffer) {
-  auto size = buffer.size() * sizeof(T);
-  return PolymorphicBuffer(
-      MakeRefCounted<OwningBufferBlock<std::vector<T>>>(std::move(buffer)), 0,
-      size);
+template<typename T>
+PolymorphicBuffer
+MakeForeignBuffer(std::vector<T> buffer)
+{
+    auto size = buffer.size() * sizeof(T);
+    return PolymorphicBuffer(MakeRefCounted<OwningBufferBlock<std::vector<T>>>(std::move(buffer)), 0, size);
 }
 
-#define TILE_INSTANIATE_MAKE_FOREIGN_BUFFER(type)                              \
-  template PolymorphicBuffer MakeForeignBuffer(std::vector<type> buffer)
+#define TILE_INSTANIATE_MAKE_FOREIGN_BUFFER(type) template PolymorphicBuffer MakeForeignBuffer(std::vector<type> buffer)
 
 TILE_INSTANIATE_MAKE_FOREIGN_BUFFER(char);
 TILE_INSTANIATE_MAKE_FOREIGN_BUFFER(signed char);
@@ -224,51 +233,50 @@ TILE_INSTANIATE_MAKE_FOREIGN_BUFFER(float);
 TILE_INSTANIATE_MAKE_FOREIGN_BUFFER(double);
 TILE_INSTANIATE_MAKE_FOREIGN_BUFFER(long double);
 
-bool StartsWith(NoncontiguousBuffer buffer, Slice prefix) {
-  if (buffer.ByteSize() < prefix.size()) {
-    return false;
-  }
+bool
+StartsWith(NoncontiguousBuffer buffer, Slice prefix)
+{
+    if (buffer.ByteSize() < prefix.size()) { return false; }
 
-  while (!buffer.Empty() && prefix.empty()) {
-    auto first = buffer.FirstContiguous();
-    auto min_len = std::min(first.size(), prefix.size());
-    if (memcmp(first.data(), prefix.data(), min_len) != 0) {
-      return false;
+    while (!buffer.Empty() && prefix.empty()) {
+        auto first   = buffer.FirstContiguous();
+        auto min_len = std::min(first.size(), prefix.size());
+        if (memcmp(first.data(), prefix.data(), min_len) != 0) { return false; }
+
+        buffer.Skip(min_len);
+        prefix.RemovePrefix(min_len);
     }
-
-    buffer.Skip(min_len);
-    prefix.RemovePrefix(min_len);
-  }
-  return prefix.empty();
+    return prefix.empty();
 }
 
-bool EndsWith(NoncontiguousBuffer buffer, Slice suffix) {
-  TILE_NOT_IMPLEMENTED("");
-  return false;
-}
-
-bool StartsWithIgnoreCase(NoncontiguousBuffer buffer, Slice prefix) {
-  if (buffer.ByteSize() < prefix.size()) {
+bool
+EndsWith(NoncontiguousBuffer buffer, Slice suffix)
+{
+    TILE_NOT_IMPLEMENTED("");
     return false;
-  }
+}
 
-  while (!buffer.Empty() && prefix.empty()) {
-    auto first = buffer.FirstContiguous();
-    auto min_len = std::min(first.size(), prefix.size());
+bool
+StartsWithIgnoreCase(NoncontiguousBuffer buffer, Slice prefix)
+{
+    if (buffer.ByteSize() < prefix.size()) { return false; }
 
-    if (!EqualsIgnoreCase(first.substr(0, min_len),
-                          prefix.substr(0, min_len))) {
-      return false;
+    while (!buffer.Empty() && prefix.empty()) {
+        auto first   = buffer.FirstContiguous();
+        auto min_len = std::min(first.size(), prefix.size());
+
+        if (!EqualsIgnoreCase(first.substr(0, min_len), prefix.substr(0, min_len))) { return false; }
+
+        buffer.Skip(min_len);
+        prefix.RemovePrefix(min_len);
     }
-
-    buffer.Skip(min_len);
-    prefix.RemovePrefix(min_len);
-  }
-  return prefix.empty();
+    return prefix.empty();
 }
 
-bool EndsWithIgnoreCase(NoncontiguousBuffer buffer, Slice suffix) {
-  TILE_NOT_IMPLEMENTED("");
+bool
+EndsWithIgnoreCase(NoncontiguousBuffer buffer, Slice suffix)
+{
+    TILE_NOT_IMPLEMENTED("");
 }
 
-} // namespace tile
+}// namespace tile

tile/base/buffer.h

@@ -19,355 +19,376 @@
 
 namespace tile {
 namespace detail {
-template <typename T>
-constexpr auto data(const T &c)
-    -> enable_if_t<std::is_convertible<decltype(c.data()), const char *>::value,
-                   const char *> {
-  return c.data();
+template<typename T>
+constexpr auto
+data(const T &c) -> enable_if_t<std::is_convertible<decltype(c.data()), const char *>::value, const char *>
+{
+    return c.data();
 }
 
-template <std::size_t N>
-constexpr auto data(const char (&c)[N]) -> decltype(c) {
-  return c;
+template<std::size_t N>
+constexpr auto
+data(const char (&c)[N]) -> decltype(c)
+{
+    return c;
 }
 
-template <typename T> constexpr std::size_t size(const T &c) {
-  return c.size();
+template<typename T>
+constexpr std::size_t
+size(const T &c)
+{
+    return c.size();
 }
 
-template <std::size_t N> struct size_impl {
-  static constexpr std::size_t size(const char (&c)[N]) {
-    return N - (c[N - 1] == '\0');
-  }
-};
-template <> struct size_impl<0> {
-  static constexpr std::size_t size(const char (&c)[0]) { return 0; }
+template<std::size_t N>
+struct size_impl {
+    static constexpr std::size_t size(const char (&c)[N]) { return N - (c[N - 1] == '\0'); }
 };
 
-template <std::size_t N> constexpr std::size_t size(const char (&c)[N]) {
-  return size_impl<N>::size(c);
+template<>
+struct size_impl<0> {
+    static constexpr std::size_t size(const char (&c)[0]) { return 0; }
+};
+
+template<std::size_t N>
+constexpr std::size_t
+size(const char (&c)[N])
+{
+    return size_impl<N>::size(c);
 }
 
-template <typename A1> constexpr std::size_t total_size(const A1 &a1) {
-  return size(a1);
+template<typename A1>
+constexpr std::size_t
+total_size(const A1 &a1)
+{
+    return size(a1);
 }
 
-template <typename A1, typename... Args>
-constexpr std::size_t total_size(const A1 &a1, const Args &...args) {
-  return size(a1) + total_size(args...);
+template<typename A1, typename... Args>
+constexpr std::size_t
+total_size(const A1 &a1, const Args &...args)
+{
+    return size(a1) + total_size(args...);
 }
 
-} // namespace detail
+}// namespace detail
 
 class NoncontiguousBuffer {
-  // <buffer_t, buffer_t::chain>
-  using LinkedBuffers =
-      internal::SinglyLinkedList<PolymorphicBuffer, &PolymorphicBuffer::chain>;
+    // <buffer_t, buffer_t::chain>
+    using LinkedBuffers = internal::SinglyLinkedList<PolymorphicBuffer, &PolymorphicBuffer::chain>;
 
 public:
-  using iterator = LinkedBuffers::iterator;
-  using const_iterator = LinkedBuffers::const_iterator;
-  using buffer_t = PolymorphicBuffer;
+    using iterator                  = LinkedBuffers::iterator;
+    using const_iterator            = LinkedBuffers::const_iterator;
+    using buffer_t                  = PolymorphicBuffer;
 
-  constexpr NoncontiguousBuffer() = default;
+    constexpr NoncontiguousBuffer() = default;
 
-  // Copyable & moveable
-  NoncontiguousBuffer(const NoncontiguousBuffer &other);
-  NoncontiguousBuffer &operator=(const NoncontiguousBuffer &other);
-  NoncontiguousBuffer(NoncontiguousBuffer &&other) noexcept
-      : byte_size_(internal::Exchange(other.byte_size_, 0)),
-        buffers_(std::move(other.buffers_)) {}
-  NoncontiguousBuffer &operator=(NoncontiguousBuffer &&other) noexcept {
-    if (TILE_UNLIKELY(&other == this)) {
-      return *this;
+    // Copyable & moveable
+    NoncontiguousBuffer(const NoncontiguousBuffer &other);
+    NoncontiguousBuffer &operator=(const NoncontiguousBuffer &other);
+
+    NoncontiguousBuffer(NoncontiguousBuffer &&other) noexcept
+        : byte_size_(internal::Exchange(other.byte_size_, 0)),
+          buffers_(std::move(other.buffers_))
+    {}
+
+    NoncontiguousBuffer &operator=(NoncontiguousBuffer &&other) noexcept
+    {
+        if (TILE_UNLIKELY(&other == this)) { return *this; }
+
+        Clear();
+        std::swap(byte_size_, other.byte_size_);
+        buffers_ = std::move(other.buffers_);
+        return *this;
     }
 
-    Clear();
-    std::swap(byte_size_, other.byte_size_);
-    buffers_ = std::move(other.buffers_);
-    return *this;
-  }
+    ~NoncontiguousBuffer() { Clear(); }
 
-  ~NoncontiguousBuffer() { Clear(); }
-
-  Slice FirstContiguous() const noexcept {
-    TILE_DCHECK(!Empty());
-    auto &&first = buffers_.front();
-    return Slice(first.data(), first.size());
-  }
-
-  void Skip(size_t bytes) noexcept {
-    TILE_DCHECK_LE(bytes, ByteSize());
-    if (TILE_UNLIKELY(bytes == 0)) {
-    } else if (bytes < buffers_.front().size()) {
-      buffers_.front().Skip(bytes);
-      byte_size_ -= bytes;
-    } else {
-      SkipSlow(bytes);
-    }
-  }
-
-  NoncontiguousBuffer Cut(std::size_t bytes) {
-    TILE_DCHECK_LE(bytes, ByteSize());
-    TILE_DCHECK_GE(bytes, 0);
-
-    NoncontiguousBuffer rc;
-    auto left = bytes;
-    while (left && left >= buffers_.front().size()) {
-      left -= buffers_.front().size();
-      rc.buffers_.push_back(buffers_.pop_front());
+    Slice FirstContiguous() const noexcept
+    {
+        TILE_DCHECK(!Empty());
+        auto &&first = buffers_.front();
+        return Slice(first.data(), first.size());
     }
 
-    if (TILE_LIKELY(left > 0)) {
-      auto ncb = object_pool::Get<PolymorphicBuffer>().Leak();
-      *ncb = buffers_.front();
-      ncb->set_size(left);
-      rc.buffers_.push_back(ncb);
-      buffers_.front().Skip(left);
-    }
-    rc.byte_size_ = bytes;
-    byte_size_ -= bytes;
-    return rc;
-  }
-
-  void Append(PolymorphicBuffer buffer) {
-    if (TILE_UNLIKELY(buffer.size() == 0)) {
-      return;
+    void Skip(size_t bytes) noexcept
+    {
+        TILE_DCHECK_LE(bytes, ByteSize());
+        if (TILE_UNLIKELY(bytes == 0)) {
+        } else if (bytes < buffers_.front().size()) {
+            buffers_.front().Skip(bytes);
+            byte_size_ -= bytes;
+        } else {
+            SkipSlow(bytes);
+        }
     }
 
-    auto block = object_pool::Get<PolymorphicBuffer>();
-    *block = std::move(buffer);
-    byte_size_ += block->size();
-    buffers_.push_back(block.Leak());
-  }
+    NoncontiguousBuffer Cut(std::size_t bytes)
+    {
+        TILE_DCHECK_LE(bytes, ByteSize());
+        TILE_DCHECK_GE(bytes, 0);
 
-  void Append(NoncontiguousBuffer buffer) {
-    byte_size_ += internal::Exchange(buffer.byte_size_, 0);
-    buffers_.splice(std::move(buffer.buffers_));
-  }
+        NoncontiguousBuffer rc;
+        auto left = bytes;
+        while (left && left >= buffers_.front().size()) {
+            left -= buffers_.front().size();
+            rc.buffers_.push_back(buffers_.pop_front());
+        }
 
-  std::size_t ByteSize() const noexcept { return byte_size_; }
-
-  bool Empty() const noexcept {
-    TILE_CHECK_EQ(buffers_.empty(), !byte_size_);
-    return !byte_size_;
-  }
-
-  void Clear() noexcept {
-    if (!Empty()) {
-      ClearSlow();
+        if (TILE_LIKELY(left > 0)) {
+            auto ncb = object_pool::Get<PolymorphicBuffer>().Leak();
+            *ncb     = buffers_.front();
+            ncb->set_size(left);
+            rc.buffers_.push_back(ncb);
+            buffers_.front().Skip(left);
+        }
+        rc.byte_size_ = bytes;
+        byte_size_ -= bytes;
+        return rc;
     }
-  }
 
-  iterator begin() noexcept { return buffers_.begin(); }
-  iterator end() noexcept { return buffers_.end(); }
-  const_iterator begin() const noexcept { return buffers_.begin(); }
-  const_iterator end() const noexcept { return buffers_.end(); }
+    void Append(PolymorphicBuffer buffer)
+    {
+        if (TILE_UNLIKELY(buffer.size() == 0)) { return; }
+
+        auto block = object_pool::Get<PolymorphicBuffer>();
+        *block     = std::move(buffer);
+        byte_size_ += block->size();
+        buffers_.push_back(block.Leak());
+    }
+
+    void Append(NoncontiguousBuffer buffer)
+    {
+        byte_size_ += internal::Exchange(buffer.byte_size_, 0);
+        buffers_.splice(std::move(buffer.buffers_));
+    }
+
+    std::size_t ByteSize() const noexcept { return byte_size_; }
+
+    bool Empty() const noexcept
+    {
+        TILE_CHECK_EQ(buffers_.empty(), !byte_size_);
+        return !byte_size_;
+    }
+
+    void Clear() noexcept
+    {
+        if (!Empty()) { ClearSlow(); }
+    }
+
+    iterator begin() noexcept { return buffers_.begin(); }
+
+    iterator end() noexcept { return buffers_.end(); }
+
+    const_iterator begin() const noexcept { return buffers_.begin(); }
+
+    const_iterator end() const noexcept { return buffers_.end(); }
 
 private:
-  void SkipSlow(size_t bytes) noexcept;
-  void ClearSlow() noexcept;
+    void SkipSlow(size_t bytes) noexcept;
+    void ClearSlow() noexcept;
 
 private:
-  std::size_t byte_size_{};
-  LinkedBuffers buffers_;
+    std::size_t byte_size_{};
+    LinkedBuffers buffers_;
 };
 
 class NoncontiguousBufferBuilder {
-  static constexpr auto kAppendViaCopyThreshold = 128;
+    static constexpr auto kAppendViaCopyThreshold = 128;
 
 public:
-  NoncontiguousBufferBuilder() { InitializeNextBlock(); }
+    NoncontiguousBufferBuilder() { InitializeNextBlock(); }
 
-  // current write ptr
-  // It's size is available at `SizeAvailable()`
-  char *data() const noexcept { return current_->mutable_data() + used_; }
+    // current write ptr
+    // It's size is available at `SizeAvailable()`
+    char *data() const noexcept { return current_->mutable_data() + used_; }
 
-  std::size_t SizeAvailable() const noexcept {
-    return current_->size() - used_;
-  }
+    std::size_t SizeAvailable() const noexcept { return current_->size() - used_; }
 
-  void MarkWritten(std::size_t bytes) {
-    TILE_DCHECK_LE(bytes, SizeAvailable(), "You're overflowing the buffer.");
-    used_ += bytes;
-    // Is fulled ?
-    if (TILE_UNLIKELY(!SizeAvailable())) {
-      FlushCurrentBlock();
-      InitializeNextBlock();
-    }
-  }
-
-  // Allocate new block
-  // return write ptr
-  char *Reserve(std::size_t bytes) {
-    static const auto kMaxBytes = 1024;
-    TILE_CHECK_LE(bytes, kMaxBytes,
-                  "At most [{}] bytes may be reserved in single call.",
-                  kMaxBytes);
-    if (SizeAvailable() < bytes) {
-      FlushCurrentBlock();
-      InitializeNextBlock();
+    void MarkWritten(std::size_t bytes)
+    {
+        TILE_DCHECK_LE(bytes, SizeAvailable(), "You're overflowing the buffer.");
+        used_ += bytes;
+        // Is fulled ?
+        if (TILE_UNLIKELY(!SizeAvailable())) {
+            FlushCurrentBlock();
+            InitializeNextBlock();
+        }
     }
 
-    auto ptr = data();
-    MarkWritten(bytes);
-    return ptr;
-  }
+    // Allocate new block
+    // return write ptr
+    char *Reserve(std::size_t bytes)
+    {
+        static const auto kMaxBytes = 1024;
+        TILE_CHECK_LE(bytes, kMaxBytes, "At most [{}] bytes may be reserved in single call.", kMaxBytes);
+        if (SizeAvailable() < bytes) {
+            FlushCurrentBlock();
+            InitializeNextBlock();
+        }
 
-  // Total number of bytes written
-  std::size_t ByteSize() const noexcept { return nb_.ByteSize() + used_; }
-
-  NoncontiguousBuffer DestructiveGet() noexcept {
-    FlushCurrentBlock();
-    return std::move(nb_);
-  }
-
-  void Append(const void *ptr, std::size_t length) {
-    auto current = data();
-    used_ += length;
-    if (TILE_LIKELY(used_ < current_->size())) {
-      memcpy(static_cast<void *>(current), ptr, length);
-      return;
-    }
-    used_ -= length;
-    AppendSlow(ptr, length);
-  }
-
-  void Append(Slice s) { return Append(s.data(), s.size()); }
-
-  void Append(const std::string &s) { Append(s.data(), s.size()); }
-
-  void Append(PolymorphicBuffer buffer) {
-    if (buffer.size() < kAppendViaCopyThreshold &&
-        SizeAvailable() >= buffer.size()) {
-      Append(buffer.data(), buffer.size());
-      return;
+        auto ptr = data();
+        MarkWritten(bytes);
+        return ptr;
     }
 
-    if (used_) {
-      FlushCurrentBlock();
-      InitializeNextBlock();
+    // Total number of bytes written
+    std::size_t ByteSize() const noexcept { return nb_.ByteSize() + used_; }
+
+    NoncontiguousBuffer DestructiveGet() noexcept
+    {
+        FlushCurrentBlock();
+        return std::move(nb_);
     }
 
-    nb_.Append(std::move(buffer));
-  }
-
-  void Append(NoncontiguousBuffer buffer) {
-    if (buffer.ByteSize() < kAppendViaCopyThreshold && SizeAvailable()) {
-      AppendCopy(buffer);
-      return;
+    void Append(const void *ptr, std::size_t length)
+    {
+        auto current = data();
+        used_ += length;
+        if (TILE_LIKELY(used_ < current_->size())) {
+            memcpy(static_cast<void *>(current), ptr, length);
+            return;
+        }
+        used_ -= length;
+        AppendSlow(ptr, length);
     }
 
-    if (used_) {
-      FlushCurrentBlock();
-      InitializeNextBlock();
+    void Append(Slice s) { return Append(s.data(), s.size()); }
+
+    void Append(const std::string &s) { Append(s.data(), s.size()); }
+
+    void Append(PolymorphicBuffer buffer)
+    {
+        if (buffer.size() < kAppendViaCopyThreshold && SizeAvailable() >= buffer.size()) {
+            Append(buffer.data(), buffer.size());
+            return;
+        }
+
+        if (used_) {
+            FlushCurrentBlock();
+            InitializeNextBlock();
+        }
+
+        nb_.Append(std::move(buffer));
     }
-    nb_.Append(std::move(buffer));
-  }
 
-  void Append(char c) { Append(static_cast<unsigned char>(c)); }
+    void Append(NoncontiguousBuffer buffer)
+    {
+        if (buffer.ByteSize() < kAppendViaCopyThreshold && SizeAvailable()) {
+            AppendCopy(buffer);
+            return;
+        }
 
-  void Append(unsigned char c) {
-    TILE_DCHECK(SizeAvailable());
-    *reinterpret_cast<unsigned char *>(data()) = c;
-    MarkWritten(1);
-  }
-
-  template <
-      typename... Ts,
-      typename =
-          internal::void_t<decltype(detail::data(std::declval<Ts &>()))...>,
-      typename =
-          internal::void_t<decltype(detail::size(std::declval<Ts &>()))...>>
-  void Append(const Ts &...buffers) {
-    auto current = data();
-    auto total = detail::total_size(buffers...);
-    used_ += total;
-    if (TILE_LIKELY(used_ < current_->size())) {
-      UncheckedAppend(current, buffers...);
-      return;
+        if (used_) {
+            FlushCurrentBlock();
+            InitializeNextBlock();
+        }
+        nb_.Append(std::move(buffer));
     }
-    used_ -= total;
-    int dummy[] = {(Append(buffers), 0)...};
-  }
 
-  template <typename T>
-  auto Append(T) -> enable_if_t<std::is_same<T, int>::value> {
-    static_assert(sizeof(T) == 0, "Please use Append(char) instead.");
-  }
+    void Append(char c) { Append(static_cast<unsigned char>(c)); }
+
+    void Append(unsigned char c)
+    {
+        TILE_DCHECK(SizeAvailable());
+        *reinterpret_cast<unsigned char *>(data()) = c;
+        MarkWritten(1);
+    }
+
+    template<typename... Ts,
+             typename = internal::void_t<decltype(detail::data(std::declval<Ts &>()))...>,
+             typename = internal::void_t<decltype(detail::size(std::declval<Ts &>()))...>>
+    void Append(const Ts &...buffers)
+    {
+        auto current = data();
+        auto total   = detail::total_size(buffers...);
+        used_ += total;
+        if (TILE_LIKELY(used_ < current_->size())) {
+            UncheckedAppend(current, buffers...);
+            return;
+        }
+        used_ -= total;
+        int dummy[] = {(Append(buffers), 0)...};
+    }
+
+    template<typename T>
+    auto Append(T) -> enable_if_t<std::is_same<T, int>::value>
+    {
+        static_assert(sizeof(T) == 0, "Please use Append(char) instead.");
+    }
 
 private:
-  // Allocate a new buffer
-  void InitializeNextBlock();
+    // Allocate a new buffer
+    void InitializeNextBlock();
 
-  void FlushCurrentBlock();
+    void FlushCurrentBlock();
 
-  void AppendSlow(const void *ptr, std::size_t length);
-  void AppendCopy(const NoncontiguousBuffer &buffer);
+    void AppendSlow(const void *ptr, std::size_t length);
+    void AppendCopy(const NoncontiguousBuffer &buffer);
 
-  template <typename T, typename...>
-  inline void UncheckedAppend(char *ptr, const T &slice) {
-    memcpy(ptr, detail::data(slice), detail::size(slice));
-  }
+    template<typename T, typename...>
+    inline void UncheckedAppend(char *ptr, const T &slice)
+    {
+        memcpy(ptr, detail::data(slice), detail::size(slice));
+    }
 
-  template <typename T, typename... Ts>
-  inline void UncheckedAppend(char *ptr, const T &slice, const Ts &...slices) {
-    memcpy(ptr, detail::data(slice), detail::size(slice));
-    UncheckedAppend(ptr + detail::size(slice), slices...);
-  }
+    template<typename T, typename... Ts>
+    inline void UncheckedAppend(char *ptr, const T &slice, const Ts &...slices)
+    {
+        memcpy(ptr, detail::data(slice), detail::size(slice));
+        UncheckedAppend(ptr + detail::size(slice), slices...);
+    }
 
 private:
-  NoncontiguousBuffer nb_;
-  std::size_t used_;
-  RefPtr<NativeBufferBlock> current_;
+    NoncontiguousBuffer nb_;
+    std::size_t used_;
+    RefPtr<NativeBufferBlock> current_;
 };
 
 namespace detail {
-void FlattenToSlowSlow(const NoncontiguousBuffer &ncb, void *buffer,
-                       std::size_t size);
+void FlattenToSlowSlow(const NoncontiguousBuffer &ncb, void *buffer, std::size_t size);
 }
 
 NoncontiguousBuffer CreateBufferSlow(Slice s);
 NoncontiguousBuffer CreateBufferSlow(const void *ptr, std::size_t size);
 
-std::string
-FlattenSlow(const NoncontiguousBuffer &nb,
-            std::size_t max_bytes = std::numeric_limits<std::size_t>::max());
-std::string FlattenSlowUntil(
-    const NoncontiguousBuffer &nb, Slice delim,
-    std::size_t max_bytes = std::numeric_limits<std::size_t>::max());
-inline void FlattenToSlow(const NoncontiguousBuffer &nb, void *buffer,
-                          std::size_t max_bytes) {
-  if (TILE_LIKELY(max_bytes <= nb.FirstContiguous().size())) {
-    std::memcpy(buffer, nb.FirstContiguous().data(), max_bytes);
-  }
-  return detail::FlattenToSlowSlow(nb, buffer, max_bytes);
+std::string FlattenSlow(const NoncontiguousBuffer &nb, std::size_t max_bytes = std::numeric_limits<std::size_t>::max());
+std::string FlattenSlowUntil(const NoncontiguousBuffer &nb,
+                             Slice delim,
+                             std::size_t max_bytes = std::numeric_limits<std::size_t>::max());
+
+inline void
+FlattenToSlow(const NoncontiguousBuffer &nb, void *buffer, std::size_t max_bytes)
+{
+    if (TILE_LIKELY(max_bytes <= nb.FirstContiguous().size())) {
+        std::memcpy(buffer, nb.FirstContiguous().data(), max_bytes);
+    }
+    return detail::FlattenToSlowSlow(nb, buffer, max_bytes);
 }
 
 PolymorphicBuffer MakeReferencingBuffer(const void *ptr, std::size_t size);
 
-template <typename F>
-PolymorphicBuffer MakeReferencingBuffer(const void *ptr, std::size_t size,
-                                        F &&completion_cb) {
-  using BufferBlock =
-      ReferencingBufferBlock<typename std::remove_reference<F>::type>;
-  return PolymorphicBuffer(
-      MakeRefCounted<BufferBlock>(
-          ptr, size,
-          std::forward<typename std::remove_reference<F>::type>(completion_cb)),
-      0, size);
+template<typename F>
+PolymorphicBuffer
+MakeReferencingBuffer(const void *ptr, std::size_t size, F &&completion_cb)
+{
+    using BufferBlock = ReferencingBufferBlock<typename std::remove_reference<F>::type>;
+    return PolymorphicBuffer(
+        MakeRefCounted<BufferBlock>(ptr, size, std::forward<typename std::remove_reference<F>::type>(completion_cb)), 0,
+        size);
 }
 
 PolymorphicBuffer MakeForeignBuffer(std::string buffer);
 
 // `T` in (`std::byte`, integral types, floating types)
-template <typename T>
+template<typename T>
 PolymorphicBuffer MakeForeignBuffer(std::vector<T> buffer);
 
 bool StartsWith(NoncontiguousBuffer buffer, Slice prefix);
 bool EndsWith(NoncontiguousBuffer buffer, Slice suffix);
 bool StartsWithIgnoreCase(NoncontiguousBuffer buffer, Slice prefix);
 bool EndsWithIgnoreCase(NoncontiguousBuffer buffer, Slice suffix);
-} // namespace tile
+}// namespace tile
 
-#endif // TILE_BASE_BUFFER_H
+#endif// TILE_BASE_BUFFER_H

tile/base/buffer/builtin_buffer_block.cc

@@ -19,104 +19,108 @@ namespace tile {
 
 namespace {
 
-template <std::size_t kSize>
-struct alignas(hardware_destructive_interference_size) FixedNativeBufferBlock
-    : NativeBufferBlock {
+template<std::size_t kSize>
+struct alignas(hardware_destructive_interference_size) FixedNativeBufferBlock : NativeBufferBlock {
 public:
-  static RefPtr<FixedNativeBufferBlock> New() {
-    // WARNING: don't use adopt_ptr
-    return RefPtr<FixedNativeBufferBlock<kSize>>(
-        adopt_ptr, object_pool::Get<FixedNativeBufferBlock<kSize>>().Leak());
-  }
+    static RefPtr<FixedNativeBufferBlock> New()
+    {
+        // WARNING: don't use adopt_ptr
+        return RefPtr<FixedNativeBufferBlock<kSize>>(
+            adopt_ptr, object_pool::Get<FixedNativeBufferBlock<kSize>>().Leak());
+    }
 
-  // HACK: add ref ensure `RefCount<Base>`.
-  static void Delete(FixedNativeBufferBlock *ptr) {
-    ptr->Save();
-    object_pool::Put<FixedNativeBufferBlock<kSize>>(ptr);
-  }
+    // HACK: add ref ensure `RefCount<Base>`.
+    static void Delete(FixedNativeBufferBlock *ptr)
+    {
+        ptr->Save();
+        object_pool::Put<FixedNativeBufferBlock<kSize>>(ptr);
+    }
 
-  char *mutable_data() noexcept override { return buffer.data(); }
-  const char *data() const noexcept override { return buffer.data(); }
-  std::size_t size() const noexcept override { return buffer.size(); }
-  void Destroy() noexcept override { Delete(this); }
+    char *mutable_data() noexcept override { return buffer.data(); }
 
-  static constexpr std::size_t kBufferSize = kSize - sizeof(NativeBufferBlock);
-  std::array<char, kBufferSize> buffer;
+    const char *data() const noexcept override { return buffer.data(); }
+
+    std::size_t size() const noexcept override { return buffer.size(); }
+
+    void Destroy() noexcept override { Delete(this); }
+
+    static constexpr std::size_t kBufferSize = kSize - sizeof(NativeBufferBlock);
+    std::array<char, kBufferSize> buffer;
 };
 
-template <std::size_t kSize>
-RefPtr<NativeBufferBlock> MakeNativeBufferBlockOfBytes() {
-  return FixedNativeBufferBlock<kSize>::New();
+template<std::size_t kSize>
+RefPtr<NativeBufferBlock>
+MakeNativeBufferBlockOfBytes()
+{
+    return FixedNativeBufferBlock<kSize>::New();
 }
 
-RefPtr<NativeBufferBlock> (*make_native_buffer_block)() =
-    MakeNativeBufferBlockOfBytes<BLOCK_SIZE_4K>;
+RefPtr<NativeBufferBlock> (*make_native_buffer_block)() = MakeNativeBufferBlockOfBytes<BLOCK_SIZE_4K>;
 
-void InitializeMakeNativeBufferBlock() {
-  static const std::unordered_map<std::string, RefPtr<NativeBufferBlock> (*)()>
-      kMakers = {{"4K", MakeNativeBufferBlockOfBytes<BLOCK_SIZE_4K>},
-                 {"64K", MakeNativeBufferBlockOfBytes<BLOCK_SIZE_64K>},
-                 {"1M", MakeNativeBufferBlockOfBytes<BLOCK_SIZE_1M>}
-
-      };
-  auto iter = kMakers.find(FLAGS_tile_buffer_block_size);
-  if (iter != kMakers.end()) {
-    make_native_buffer_block = iter->second;
-  } else {
-    TILE_UNEXPECTED(
-        "Unexpected buffer block size [{}]. Only 4K/64K/1M buffer block "
-        "is supported.",
-        FLAGS_tile_buffer_block_size);
-  }
+void
+InitializeMakeNativeBufferBlock()
+{
+    static const std::unordered_map<std::string, RefPtr<NativeBufferBlock> (*)()> kMakers = {
+        {"4K",  MakeNativeBufferBlockOfBytes<BLOCK_SIZE_4K> },
+        {"64K", MakeNativeBufferBlockOfBytes<BLOCK_SIZE_64K>},
+        {"1M",  MakeNativeBufferBlockOfBytes<BLOCK_SIZE_1M> }
+    };
+    auto iter = kMakers.find(FLAGS_tile_buffer_block_size);
+    if (iter != kMakers.end()) {
+        make_native_buffer_block = iter->second;
+    } else {
+        TILE_UNEXPECTED("Unexpected buffer block size [{}]. Only 4K/64K/1M buffer block "
+                        "is supported.",
+                        FLAGS_tile_buffer_block_size);
+    }
 }
 
 TILE_ON_INIT(0, InitializeMakeNativeBufferBlock);
 
-} // namespace
+}// namespace
 
-RefPtr<NativeBufferBlock> MakeNativeBufferBlock() {
-  return make_native_buffer_block();
+RefPtr<NativeBufferBlock>
+MakeNativeBufferBlock()
+{
+    return make_native_buffer_block();
 }
 
-template <> struct PoolTraits<FixedNativeBufferBlock<BLOCK_SIZE_4K>> {
-  static constexpr auto kType = PoolType::MemoryNodeShared;
-  static constexpr auto kLowWaterMark = 16384; // 64M per node.
-  static constexpr auto kHighWaterMark =
-      std::numeric_limits<std::size_t>::max();
-  static constexpr auto kMaxIdle = std::chrono::seconds(10);
-  static constexpr auto kMinimumThreadCacheSize = 4096; // 16M per thread.
-  static constexpr auto kTransferBatchSize = 1024;      // Extra 4M.
+template<>
+struct PoolTraits<FixedNativeBufferBlock<BLOCK_SIZE_4K>> {
+    static constexpr auto kType                   = PoolType::MemoryNodeShared;
+    static constexpr auto kLowWaterMark           = 16384;// 64M per node.
+    static constexpr auto kHighWaterMark          = std::numeric_limits<std::size_t>::max();
+    static constexpr auto kMaxIdle                = std::chrono::seconds(10);
+    static constexpr auto kMinimumThreadCacheSize = 4096;// 16M per thread.
+    static constexpr auto kTransferBatchSize      = 1024;// Extra 4M.
 };
 
-template <> struct PoolTraits<FixedNativeBufferBlock<BLOCK_SIZE_64K>> {
-  static constexpr auto kType = PoolType::MemoryNodeShared;
-  static constexpr auto kLowWaterMark = 1024; // 64M per node.
-  static constexpr auto kHighWaterMark =
-      std::numeric_limits<std::size_t>::max();
-  static constexpr auto kMaxIdle = std::chrono::seconds(10);
-  static constexpr auto kMinimumThreadCacheSize = 256; // 16M per thread.
-  static constexpr auto kTransferBatchSize = 64;       // Extra 4M.
+template<>
+struct PoolTraits<FixedNativeBufferBlock<BLOCK_SIZE_64K>> {
+    static constexpr auto kType                   = PoolType::MemoryNodeShared;
+    static constexpr auto kLowWaterMark           = 1024;// 64M per node.
+    static constexpr auto kHighWaterMark          = std::numeric_limits<std::size_t>::max();
+    static constexpr auto kMaxIdle                = std::chrono::seconds(10);
+    static constexpr auto kMinimumThreadCacheSize = 256;// 16M per thread.
+    static constexpr auto kTransferBatchSize      = 64; // Extra 4M.
 };
 
-template <> struct PoolTraits<FixedNativeBufferBlock<BLOCK_SIZE_1M>> {
-  static constexpr auto kType = PoolType::MemoryNodeShared;
-  static constexpr auto kLowWaterMark = 128; // 128M per node.
-  static constexpr auto kHighWaterMark =
-      std::numeric_limits<std::size_t>::max();
-  static constexpr auto kMaxIdle = std::chrono::seconds(10);
-  static constexpr auto kMinimumThreadCacheSize = 64; // 64M per thread.
-  static constexpr auto kTransferBatchSize = 16;      // Extra 16M.
+template<>
+struct PoolTraits<FixedNativeBufferBlock<BLOCK_SIZE_1M>> {
+    static constexpr auto kType                   = PoolType::MemoryNodeShared;
+    static constexpr auto kLowWaterMark           = 128;// 128M per node.
+    static constexpr auto kHighWaterMark          = std::numeric_limits<std::size_t>::max();
+    static constexpr auto kMaxIdle                = std::chrono::seconds(10);
+    static constexpr auto kMinimumThreadCacheSize = 64;// 64M per thread.
+    static constexpr auto kTransferBatchSize      = 16;// Extra 16M.
 };
 
 constexpr PoolType PoolTraits<FixedNativeBufferBlock<BLOCK_SIZE_4K>>::kType;
 constexpr PoolType PoolTraits<FixedNativeBufferBlock<BLOCK_SIZE_64K>>::kType;
 constexpr PoolType PoolTraits<FixedNativeBufferBlock<BLOCK_SIZE_1M>>::kType;
 
-constexpr std::chrono::seconds
-    PoolTraits<FixedNativeBufferBlock<BLOCK_SIZE_4K>>::kMaxIdle;
-constexpr std::chrono::seconds
-    PoolTraits<FixedNativeBufferBlock<BLOCK_SIZE_64K>>::kMaxIdle;
-constexpr std::chrono::seconds
-    PoolTraits<FixedNativeBufferBlock<BLOCK_SIZE_1M>>::kMaxIdle;
+constexpr std::chrono::seconds PoolTraits<FixedNativeBufferBlock<BLOCK_SIZE_4K>>::kMaxIdle;
+constexpr std::chrono::seconds PoolTraits<FixedNativeBufferBlock<BLOCK_SIZE_64K>>::kMaxIdle;
+constexpr std::chrono::seconds PoolTraits<FixedNativeBufferBlock<BLOCK_SIZE_1M>>::kMaxIdle;
 
-} // namespace tile
+}// namespace tile

tile/base/buffer/builtin_buffer_block.h

@@ -8,34 +8,32 @@
 #include "tile/base/ref_ptr.h"
 
 namespace tile {
-class alignas(hardware_destructive_interference_size) NativeBufferBlock
-    : public PolymorphicBufferBlock {
+class alignas(hardware_destructive_interference_size) NativeBufferBlock : public PolymorphicBufferBlock {
 public:
-  virtual char *mutable_data() noexcept = 0;
+    virtual char *mutable_data() noexcept = 0;
 };
 
 RefPtr<NativeBufferBlock> MakeNativeBufferBlock();
 
-template <typename F>
-class ReferencingBufferBlock : public PolymorphicBufferBlock,
-                               private F /* Empty Base Optimize */ {
+template<typename F>
+class ReferencingBufferBlock : public PolymorphicBufferBlock, private F /* Empty Base Optimize */ {
 public:
-  explicit ReferencingBufferBlock(const void *ptr, std::size_t size,
-                                  F &&completion_cb)
-      : F(std::move(completion_cb)), ptr_(ptr), size_(size) {}
+    explicit ReferencingBufferBlock(const void *ptr, std::size_t size, F &&completion_cb)
+        : F(std::move(completion_cb)),
+          ptr_(ptr),
+          size_(size)
+    {}
 
-  ~ReferencingBufferBlock() override { (*this)(); }
+    ~ReferencingBufferBlock() override { (*this)(); }
 
-  const char *data() const noexcept override {
-    return reinterpret_cast<const char *>(ptr_);
-  }
+    const char *data() const noexcept override { return reinterpret_cast<const char *>(ptr_); }
 
-  std::size_t size() const noexcept override { return size_; }
+    std::size_t size() const noexcept override { return size_; }
 
 private:
-  const void *ptr_;
-  std::size_t size_;
-}; // namespace tile
-} // namespace tile
+    const void *ptr_;
+    std::size_t size_;
+};// namespace tile
+}// namespace tile
 
-#endif // TILE_BASE_BUFFER_BUILTIN_BUFFER_BLOCK_H
+#endif// TILE_BASE_BUFFER_BUILTIN_BUFFER_BLOCK_H

tile/base/buffer/circular_buffer.h

@@ -9,59 +9,63 @@
 #include <vector>
 
 namespace tile {
-template <typename T> class CircularBuffer {
-  class UninitializedObject;
+template<typename T>
+class CircularBuffer {
+    class UninitializedObject;
 
 public:
-  explicit CircularBuffer(std::size_t capacity);
+    explicit CircularBuffer(std::size_t capacity);
 
-  template <typename... Ts> bool Emplace(Ts &&...args) {
-    auto head = head_.load(std::memory_order_relaxed);
-    auto next = NormalizeIndex(head + 1);
+    template<typename... Ts>
+    bool Emplace(Ts &&...args)
+    {
+        auto head = head_.load(std::memory_order_relaxed);
+        auto next = NormalizeIndex(head + 1);
 
-    if (next == tail_.load(std::memory_order_acquire)) {
-      return false;
+        if (next == tail_.load(std::memory_order_acquire)) { return false; }
+
+        objects_[head].Initialize(std::forward<Ts>(args)...);
+        head_.store(next, std::memory_order_release);
+        return true;
     }
 
-    objects_[head].Initialize(std::forward<Ts>(args)...);
-    head_.store(next, std::memory_order_release);
-    return true;
-  }
+    void Pop(std::vector<T> *objects)
+    {
+        auto upto    = head_.load(std::memory_order_acquire);
+        auto current = tail_.load(std::memory_order_relaxed);
+        while (current != upto) {
+            objects->push_back(std::move(*objects_[current].Get()));
+            objects_[current].Destroy();
+            current = NormalizeIndex(current + 1);
+        }
 
-  void Pop(std::vector<T> *objects) {
-    auto upto = head_.load(std::memory_order_acquire);
-    auto current = tail_.load(std::memory_order_relaxed);
-    while (current != upto) {
-      objects->push_back(std::move(*objects_[current].Get()));
-      objects_[current].Destroy();
-      current = NormalizeIndex(current + 1);
+        tail_.store(current, std::memory_order_release);
     }
 
-    tail_.store(current, std::memory_order_release);
-  }
-
 private:
-  class UninitializedObject {
-  public:
-    T *Get() noexcept { return reinterpret_cast<T *>(&storage_); }
-    template <typename... Ts> void Initialize(Ts &&...args) {
-      new (Get()) T(std::forward<Ts>(args)...);
-    }
+    class UninitializedObject {
+    public:
+        T *Get() noexcept { return reinterpret_cast<T *>(&storage_); }
 
-    void Destroy() { Get()->~T(); }
+        template<typename... Ts>
+        void Initialize(Ts &&...args)
+        {
+            new (Get()) T(std::forward<Ts>(args)...);
+        }
 
-  private:
-    std::aligned_storage<sizeof(T), alignof(T)> storage_;
-  };
-  std::size_t NormalizeIndex(std::size_t x) {
-    return (x < capacity_) ? x : x - capacity_;
-  }
+        void Destroy() { Get()->~T(); }
+
+    private:
+        std::aligned_storage<sizeof(T), alignof(T)> storage_;
+    };
+
+    std::size_t NormalizeIndex(std::size_t x) { return (x < capacity_) ? x : x - capacity_; }
 
 private:
-  std::size_t capacity_;
-  std::unique_ptr<UninitializedObject[]> objects_;
-  std::atomic<std::size_t> head_{}, tail_{};
+    std::size_t capacity_;
+    std::unique_ptr<UninitializedObject[]> objects_;
+    std::atomic<std::size_t> head_{}, tail_{};
 };
-} // namespace tile
+}// namespace tile
 
-#endif // _TILE_BASE_BUFFER_CIRCULAR_BUFFER_H
+#endif// _TILE_BASE_BUFFER_CIRCULAR_BUFFER_H

tile/base/buffer/compression_output_stream.cc

@@ -2,42 +2,39 @@
 
 namespace tile {
 
-NoncontiguousBufferCompressionOutputStream::
-    NoncontiguousBufferCompressionOutputStream(
-        NoncontiguousBufferBuilder *builder)
-    : builder_(builder) {}
+NoncontiguousBufferCompressionOutputStream::NoncontiguousBufferCompressionOutputStream(
+    NoncontiguousBufferBuilder *builder)
+    : builder_(builder)
+{}
 
-NoncontiguousBufferCompressionOutputStream::
-    ~NoncontiguousBufferCompressionOutputStream() {
-  Flush();
+NoncontiguousBufferCompressionOutputStream::~NoncontiguousBufferCompressionOutputStream() { Flush(); }
+
+void
+NoncontiguousBufferCompressionOutputStream::Flush()
+{
+    if (using_bytes_ > 0) {
+        builder_->MarkWritten(using_bytes_);
+        using_bytes_ = 0;
+    }
 }
 
-void NoncontiguousBufferCompressionOutputStream::Flush() {
-  if (using_bytes_ > 0) {
-    builder_->MarkWritten(using_bytes_);
-    using_bytes_ = 0;
-  }
+bool
+NoncontiguousBufferCompressionOutputStream::Next(void **data, std::size_t *size) noexcept
+{
+    if (!builder_) { return false; }
+
+    if (using_bytes_) { builder_->MarkWritten(using_bytes_); }
+
+    *data        = builder_->data();
+    *size        = builder_->SizeAvailable();
+    using_bytes_ = *size;
+    TILE_CHECK(*size > 0);
+    return true;
 }
 
-bool NoncontiguousBufferCompressionOutputStream::Next(
-    void **data, std::size_t *size) noexcept {
-  if (!builder_) {
-    return false;
-  }
-
-  if (using_bytes_) {
-    builder_->MarkWritten(using_bytes_);
-  }
-
-  *data = builder_->data();
-  *size = builder_->SizeAvailable();
-  using_bytes_ = *size;
-  TILE_CHECK(*size > 0);
-  return true;
+void
+NoncontiguousBufferCompressionOutputStream::BackUp(std::size_t count) noexcept
+{
+    using_bytes_ -= count;
 }
-
-void NoncontiguousBufferCompressionOutputStream::BackUp(
-    std::size_t count) noexcept {
-  using_bytes_ -= count;
-}
-} // namespace tile
+}// namespace tile

tile/base/buffer/compression_output_stream.h

@@ -6,22 +6,20 @@
 #include "tile/base/compression/compression.h"
 
 namespace tile {
-class NoncontiguousBufferCompressionOutputStream
-    : public CompressionOutputStream {
+class NoncontiguousBufferCompressionOutputStream : public CompressionOutputStream {
 public:
-  explicit NoncontiguousBufferCompressionOutputStream(
-      NoncontiguousBufferBuilder *builder);
-  ~NoncontiguousBufferCompressionOutputStream() override;
+    explicit NoncontiguousBufferCompressionOutputStream(NoncontiguousBufferBuilder *builder);
+    ~NoncontiguousBufferCompressionOutputStream() override;
 
-  void Flush();
+    void Flush();
 
-  bool Next(void **data, std::size_t *size) noexcept override;
-  void BackUp(std::size_t count) noexcept override;
+    bool Next(void **data, std::size_t *size) noexcept override;
+    void BackUp(std::size_t count) noexcept override;
 
 private:
-  std::size_t using_bytes_{};
-  NoncontiguousBufferBuilder *builder_;
+    std::size_t using_bytes_{};
+    NoncontiguousBufferBuilder *builder_;
 };
-} // namespace tile
+}// namespace tile
 
-#endif // TILE_BASE_BUFFER_COMPRESSION_OUTPUT_STREAM_H
+#endif// TILE_BASE_BUFFER_COMPRESSION_OUTPUT_STREAM_H

tile/base/buffer/polymorphic_buffer.cc

@@ -8,14 +8,18 @@ constexpr std::chrono::seconds PoolTraits<PolymorphicBuffer>::kMaxIdle;
 constexpr std::size_t PoolTraits<PolymorphicBuffer>::kMinimumThreadCacheSize;
 constexpr std::size_t PoolTraits<PolymorphicBuffer>::kTransferBatchSize;
 
-void PoolTraits<PolymorphicBuffer>::OnPut(PolymorphicBuffer *bb) {
-  bb->Clear();
+void
+PoolTraits<PolymorphicBuffer>::OnPut(PolymorphicBuffer *bb)
+{
+    bb->Clear();
 }
 
 namespace detail {
-void PolymorphicBufferBlockDeleter ::operator()(PolymorphicBufferBlock *p) {
-  TILE_DCHECK_EQ(p->UnsafeRefCount(), 0);
-  p->Destroy();
+void
+PolymorphicBufferBlockDeleter ::operator()(PolymorphicBufferBlock *p)
+{
+    TILE_DCHECK_EQ(p->UnsafeRefCount(), 0);
+    p->Destroy();
 }
-} // namespace detail
-} // namespace tile
+}// namespace detail
+}// namespace tile

tile/base/buffer/polymorphic_buffer.h

@@ -19,102 +19,111 @@ namespace detail {
 struct PolymorphicBufferBlockDeleter;
 }
 
-class PolymorphicBufferBlock
-    : public RefCounted<PolymorphicBufferBlock,
-                        detail::PolymorphicBufferBlockDeleter> {
+class PolymorphicBufferBlock : public RefCounted<PolymorphicBufferBlock, detail::PolymorphicBufferBlockDeleter> {
 public:
-  virtual ~PolymorphicBufferBlock() = default;
-  virtual const char *data() const noexcept = 0;
-  virtual std::size_t size() const noexcept = 0;
-  virtual void Destroy() noexcept { delete this; }
+    virtual ~PolymorphicBufferBlock()         = default;
+    virtual const char *data() const noexcept = 0;
+    virtual std::size_t size() const noexcept = 0;
+
+    virtual void Destroy() noexcept { delete this; }
 };
 
-static_assert(!std::is_same<detail::as_ref_counted_t<PolymorphicBufferBlock>,
-                            PolymorphicBufferBlock>::value,
-              "");
-static_assert(detail::is_default_ref_traits_safe<PolymorphicBufferBlock>::value,
-              "");
+static_assert(!std::is_same<detail::as_ref_counted_t<PolymorphicBufferBlock>, PolymorphicBufferBlock>::value, "");
+static_assert(detail::is_default_ref_traits_safe<PolymorphicBufferBlock>::value, "");
+
 class PolymorphicBuffer {
 public:
-  PolymorphicBuffer() = default;
-  PolymorphicBuffer(const PolymorphicBuffer &) = default;
-  PolymorphicBuffer &operator=(const PolymorphicBuffer &) = default;
+    PolymorphicBuffer()                                     = default;
+    PolymorphicBuffer(const PolymorphicBuffer &)            = default;
+    PolymorphicBuffer &operator=(const PolymorphicBuffer &) = default;
 
-  PolymorphicBuffer(PolymorphicBuffer &&other) noexcept
-      : ptr_(other.ptr_), size_(other.size_), ref_(std::move(other.ref_)) {
-    other.Clear();
-  }
-  PolymorphicBuffer &operator=(PolymorphicBuffer &&other) noexcept {
-    if (this != &other) {
-      ptr_ = other.ptr_;
-      size_ = other.size_;
-      ref_ = other.ref_;
-      other.Clear();
+    PolymorphicBuffer(PolymorphicBuffer &&other) noexcept
+        : ptr_(other.ptr_),
+          size_(other.size_),
+          ref_(std::move(other.ref_))
+    {
+        other.Clear();
     }
-    return *this;
-  }
 
-  PolymorphicBuffer(RefPtr<PolymorphicBufferBlock> data, std::size_t start,
-                    std::size_t size)
-      : ptr_(data->data() + start), size_(size), ref_(std::move(data)) {}
+    PolymorphicBuffer &operator=(PolymorphicBuffer &&other) noexcept
+    {
+        if (this != &other) {
+            ptr_  = other.ptr_;
+            size_ = other.size_;
+            ref_  = other.ref_;
+            other.Clear();
+        }
+        return *this;
+    }
 
-  const char *data() const noexcept { return ptr_; }
-  std::size_t size() const noexcept { return size_; }
+    PolymorphicBuffer(RefPtr<PolymorphicBufferBlock> data, std::size_t start, std::size_t size)
+        : ptr_(data->data() + start),
+          size_(size),
+          ref_(std::move(data))
+    {}
 
-  void Skip(std::size_t bytes) {
-    TILE_CHECK_LT(bytes, size_);
-    size_ -= bytes;
-    ptr_ += bytes;
-  }
+    const char *data() const noexcept { return ptr_; }
 
-  void set_size(std::size_t size) {
-    TILE_DCHECK_LE(size, size_);
-    size_ = size;
-  }
+    std::size_t size() const noexcept { return size_; }
 
-  void Reset(RefPtr<PolymorphicBufferBlock> data, std::size_t start,
-             std::size_t size) {
-    TILE_DCHECK_LE(start, size);
-    TILE_DCHECK_LE(size, data->size());
+    void Skip(std::size_t bytes)
+    {
+        TILE_CHECK_LT(bytes, size_);
+        size_ -= bytes;
+        ptr_ += bytes;
+    }
 
-    ref_ = std::move(data);
-    ptr_ = data->data() + start;
-    size_ = size;
-  }
+    void set_size(std::size_t size)
+    {
+        TILE_DCHECK_LE(size, size_);
+        size_ = size;
+    }
 
-  void Clear() {
-    ptr_ = nullptr;
-    size_ = 0;
-    ref_ = nullptr;
-  }
+    void Reset(RefPtr<PolymorphicBufferBlock> data, std::size_t start, std::size_t size)
+    {
+        TILE_DCHECK_LE(start, size);
+        TILE_DCHECK_LE(size, data->size());
+
+        ref_  = std::move(data);
+        ptr_  = data->data() + start;
+        size_ = size;
+    }
+
+    void Clear()
+    {
+        ptr_  = nullptr;
+        size_ = 0;
+        ref_  = nullptr;
+    }
 
 private:
-  friend class NoncontiguousBuffer;
+    friend class NoncontiguousBuffer;
 
-  internal::SinglyLinkedListEntry chain;
-  const char *ptr_{};
-  std::size_t size_{};
-  RefPtr<PolymorphicBufferBlock> ref_;
+    internal::SinglyLinkedListEntry chain;
+    const char *ptr_{};
+    std::size_t size_{};
+    RefPtr<PolymorphicBufferBlock> ref_;
 };
+
 namespace detail {
 struct PolymorphicBufferBlockDeleter {
-  void operator()(PolymorphicBufferBlock *p);
+    void operator()(PolymorphicBufferBlock *p);
 };
-} // namespace detail
+}// namespace detail
 
-} // namespace tile
+}// namespace tile
 
 namespace tile {
-template <> struct PoolTraits<PolymorphicBuffer> {
-  static constexpr auto kType = PoolType::MemoryNodeShared;
-  static constexpr std::size_t kLowWaterMark = 32768;
-  static constexpr std::size_t kHighWaterMark =
-      std::numeric_limits<std::size_t>::max();
-  static constexpr std::chrono::seconds kMaxIdle = std::chrono::seconds(10);
-  static constexpr std::size_t kMinimumThreadCacheSize = 8192;
-  static constexpr std::size_t kTransferBatchSize = 1024;
+template<>
+struct PoolTraits<PolymorphicBuffer> {
+    static constexpr auto kType                          = PoolType::MemoryNodeShared;
+    static constexpr std::size_t kLowWaterMark           = 32768;
+    static constexpr std::size_t kHighWaterMark          = std::numeric_limits<std::size_t>::max();
+    static constexpr std::chrono::seconds kMaxIdle       = std::chrono::seconds(10);
+    static constexpr std::size_t kMinimumThreadCacheSize = 8192;
+    static constexpr std::size_t kTransferBatchSize      = 1024;
 
-  static void OnPut(PolymorphicBuffer *bb);
+    static void OnPut(PolymorphicBuffer *bb);
 };
-} // namespace tile
-#endif // TILE_BASE_BUFFER_POLYMORPHIC_BUFFER_H
+}// namespace tile
+#endif// TILE_BASE_BUFFER_POLYMORPHIC_BUFFER_H

tile/base/buffer_test.cc

@@ -14,280 +14,308 @@ namespace tile {
 
 namespace {
 
-PolymorphicBuffer MakeNativeBuffer(Slice s) {
-  auto buffer = MakeNativeBufferBlock();
-  memcpy(buffer->mutable_data(), s.data(), s.size());
-  return PolymorphicBuffer(buffer, 0, s.size());
+PolymorphicBuffer
+MakeNativeBuffer(Slice s)
+{
+    auto buffer = MakeNativeBufferBlock();
+    memcpy(buffer->mutable_data(), s.data(), s.size());
+    return PolymorphicBuffer(buffer, 0, s.size());
 }
 
-} // namespace
+}// namespace
 
-TEST(CreateBufferSlow, All) {
-  static const auto kData = Slice("sadfas234sadf-/+8sdaf sd f~!#");
-  auto nb = CreateBufferSlow(kData);
-  ASSERT_EQ(kData, nb.FirstContiguous().data());
-  ASSERT_EQ(kData, FlattenSlow(nb));
+TEST(CreateBufferSlow, All)
+{
+    static const auto kData = Slice("sadfas234sadf-/+8sdaf sd f~!#");
+    auto nb                 = CreateBufferSlow(kData);
+    ASSERT_EQ(kData, nb.FirstContiguous().data());
+    ASSERT_EQ(kData, FlattenSlow(nb));
 }
 
-TEST(NoncontiguousBuffer, Cut) {
-  NoncontiguousBuffer nb;
-  nb.Append(CreateBufferSlow("asdf"));
-  auto r = nb.Cut(3);
-  ASSERT_EQ(1, nb.ByteSize());
-  ASSERT_EQ("f", FlattenSlow(nb));
-  ASSERT_EQ(3, r.ByteSize());
-  ASSERT_EQ("asd", FlattenSlow(r));
+TEST(NoncontiguousBuffer, Cut)
+{
+    NoncontiguousBuffer nb;
+    nb.Append(CreateBufferSlow("asdf"));
+    auto r = nb.Cut(3);
+    ASSERT_EQ(1, nb.ByteSize());
+    ASSERT_EQ("f", FlattenSlow(nb));
+    ASSERT_EQ(3, r.ByteSize());
+    ASSERT_EQ("asd", FlattenSlow(r));
 }
 
-TEST(NoncontiguousBuffer, Cut1) {
-  NoncontiguousBuffer nb;
-  nb.Append(CreateBufferSlow("asdf"));
-  auto r = nb.Cut(4);
-  ASSERT_TRUE(nb.Empty());
-  ASSERT_EQ(4, r.ByteSize());
+TEST(NoncontiguousBuffer, Cut1)
+{
+    NoncontiguousBuffer nb;
+    nb.Append(CreateBufferSlow("asdf"));
+    auto r = nb.Cut(4);
+    ASSERT_TRUE(nb.Empty());
+    ASSERT_EQ(4, r.ByteSize());
 }
 
-TEST(NoncontiguousBuffer, Cut2) {
-  NoncontiguousBuffer nb;
-  nb.Append(MakeNativeBuffer("asdf"));
-  nb.Append(MakeNativeBuffer("asdf"));
-  auto r = nb.Cut(4);
-  ASSERT_EQ(4, nb.ByteSize());
-  ASSERT_EQ(4, r.ByteSize());
+TEST(NoncontiguousBuffer, Cut2)
+{
+    NoncontiguousBuffer nb;
+    nb.Append(MakeNativeBuffer("asdf"));
+    nb.Append(MakeNativeBuffer("asdf"));
+    auto r = nb.Cut(4);
+    ASSERT_EQ(4, nb.ByteSize());
+    ASSERT_EQ(4, r.ByteSize());
 }
 
-TEST(NoncontiguousBuffer, Cut3) {
-  NoncontiguousBuffer nb;
-  nb.Append(MakeNativeBuffer("asdf"));
-  nb.Append(MakeNativeBuffer("asdf"));
-  auto r = nb.Cut(8);
-  ASSERT_TRUE(nb.Empty());
-  ASSERT_EQ(8, r.ByteSize());
+TEST(NoncontiguousBuffer, Cut3)
+{
+    NoncontiguousBuffer nb;
+    nb.Append(MakeNativeBuffer("asdf"));
+    nb.Append(MakeNativeBuffer("asdf"));
+    auto r = nb.Cut(8);
+    ASSERT_TRUE(nb.Empty());
+    ASSERT_EQ(8, r.ByteSize());
 }
 
-TEST(NoncontiguousBuffer, Cut4) {
-  auto nb = CreateBufferSlow("asdfasf2345sfsdfdf");
-  auto nb2 = nb;
-  ASSERT_EQ(FlattenSlow(nb), FlattenSlow(nb2));
-  NoncontiguousBuffer splited;
-  splited.Append(nb.Cut(1));
-  splited.Append(nb.Cut(2));
-  splited.Append(nb.Cut(3));
-  splited.Append(nb.Cut(4));
-  splited.Append(std::move(nb));
-  ASSERT_EQ(FlattenSlow(nb2), FlattenSlow(splited));
+TEST(NoncontiguousBuffer, Cut4)
+{
+    auto nb  = CreateBufferSlow("asdfasf2345sfsdfdf");
+    auto nb2 = nb;
+    ASSERT_EQ(FlattenSlow(nb), FlattenSlow(nb2));
+    NoncontiguousBuffer splited;
+    splited.Append(nb.Cut(1));
+    splited.Append(nb.Cut(2));
+    splited.Append(nb.Cut(3));
+    splited.Append(nb.Cut(4));
+    splited.Append(std::move(nb));
+    ASSERT_EQ(FlattenSlow(nb2), FlattenSlow(splited));
 }
 
-TEST(NoncontiguousBuffer, Skip) {
-  NoncontiguousBuffer splited;
-  splited.Append(CreateBufferSlow("asdf"));
-  splited.Append(CreateBufferSlow("asdf"));
-  splited.Append(CreateBufferSlow("asdf"));
-  splited.Append(CreateBufferSlow("asdf"));
-  splited.Append(CreateBufferSlow("asdf"));
-  splited.Append(CreateBufferSlow("asdf"));
-  splited.Append(CreateBufferSlow("asdf"));
-  splited.Append(CreateBufferSlow("asdf"));
-  splited.Skip(32);
-  ASSERT_EQ(0, splited.ByteSize());
+TEST(NoncontiguousBuffer, Skip)
+{
+    NoncontiguousBuffer splited;
+    splited.Append(CreateBufferSlow("asdf"));
+    splited.Append(CreateBufferSlow("asdf"));
+    splited.Append(CreateBufferSlow("asdf"));
+    splited.Append(CreateBufferSlow("asdf"));
+    splited.Append(CreateBufferSlow("asdf"));
+    splited.Append(CreateBufferSlow("asdf"));
+    splited.Append(CreateBufferSlow("asdf"));
+    splited.Append(CreateBufferSlow("asdf"));
+    splited.Skip(32);
+    ASSERT_EQ(0, splited.ByteSize());
 }
 
-TEST(NoncontiguousBuffer, Skip2) {
-  NoncontiguousBuffer buffer;
-  EXPECT_TRUE(buffer.Empty());
-  buffer.Skip(0); // Don't crash.
-  EXPECT_TRUE(buffer.Empty());
+TEST(NoncontiguousBuffer, Skip2)
+{
+    NoncontiguousBuffer buffer;
+    EXPECT_TRUE(buffer.Empty());
+    buffer.Skip(0);// Don't crash.
+    EXPECT_TRUE(buffer.Empty());
 }
 
-TEST(NoncontiguousBuffer, FlattenSlow) {
-  NoncontiguousBuffer nb;
-  nb.Append(MakeNativeBuffer("asd4234"));
-  nb.Append(MakeNativeBuffer("aXsdfsadfasdf2342"));
-  ASSERT_EQ("asd4234aXs", FlattenSlow(nb, 10));
+TEST(NoncontiguousBuffer, FlattenSlow)
+{
+    NoncontiguousBuffer nb;
+    nb.Append(MakeNativeBuffer("asd4234"));
+    nb.Append(MakeNativeBuffer("aXsdfsadfasdf2342"));
+    ASSERT_EQ("asd4234aXs", FlattenSlow(nb, 10));
 }
 
-TEST(NoncontiguousBuffer, FlattenToSlow) {
-  struct C {
-    std::uint64_t ll;
-    int i;
-    bool f;
-  };
-  NoncontiguousBuffer nb;
-  nb.Append(MakeNativeBuffer(Slice("\x12\x34\x56\x78\x9a\xbc\xde\xf0", 8)));
-  nb.Append(MakeNativeBuffer(Slice("\x12\x34\x56\x78", 4)));
-  nb.Append(MakeNativeBuffer(Slice("\x1", 1)));
-  nb.Append(MakeNativeBuffer(Slice("\x00\x00\x00", 3))); // Padding
-  C c;
-  FlattenToSlow(nb, &c, sizeof(C));
-  ASSERT_EQ(0xf0debc9a78563412, c.ll);
-  ASSERT_EQ(0x78563412, c.i);
-  ASSERT_EQ(true, c.f);
+TEST(NoncontiguousBuffer, FlattenToSlow)
+{
+    struct C {
+        std::uint64_t ll;
+        int i;
+        bool f;
+    };
+
+    NoncontiguousBuffer nb;
+    nb.Append(MakeNativeBuffer(Slice("\x12\x34\x56\x78\x9a\xbc\xde\xf0", 8)));
+    nb.Append(MakeNativeBuffer(Slice("\x12\x34\x56\x78", 4)));
+    nb.Append(MakeNativeBuffer(Slice("\x1", 1)));
+    nb.Append(MakeNativeBuffer(Slice("\x00\x00\x00", 3)));// Padding
+    C c;
+    FlattenToSlow(nb, &c, sizeof(C));
+    ASSERT_EQ(0xf0debc9a78563412, c.ll);
+    ASSERT_EQ(0x78563412, c.i);
+    ASSERT_EQ(true, c.f);
 }
 
-TEST(NoncontiguousBuffer, FlattenSlowUntil) {
-  NoncontiguousBuffer nb;
-  nb.Append(MakeNativeBuffer("asd4234"));
-  nb.Append(MakeNativeBuffer("aXsdfsadfasdf2342"));
-  ASSERT_EQ("asd4234aX", FlattenSlowUntil(nb, "aX"));
-  ASSERT_EQ("asd4", FlattenSlowUntil(nb, "4"));
-  ASSERT_EQ("asd4234aXsdfsadfasdf2342", FlattenSlowUntil(nb, "2342"));
-  ASSERT_EQ("asd42", FlattenSlowUntil(nb, "z", 5));
-  ASSERT_EQ("asd42", FlattenSlowUntil(nb, "3", 5));
-  ASSERT_EQ("asd42", FlattenSlowUntil(nb, "2", 5));
-  ASSERT_EQ("asd4", FlattenSlowUntil(nb, "4", 5));
+TEST(NoncontiguousBuffer, FlattenSlowUntil)
+{
+    NoncontiguousBuffer nb;
+    nb.Append(MakeNativeBuffer("asd4234"));
+    nb.Append(MakeNativeBuffer("aXsdfsadfasdf2342"));
+    ASSERT_EQ("asd4234aX", FlattenSlowUntil(nb, "aX"));
+    ASSERT_EQ("asd4", FlattenSlowUntil(nb, "4"));
+    ASSERT_EQ("asd4234aXsdfsadfasdf2342", FlattenSlowUntil(nb, "2342"));
+    ASSERT_EQ("asd42", FlattenSlowUntil(nb, "z", 5));
+    ASSERT_EQ("asd42", FlattenSlowUntil(nb, "3", 5));
+    ASSERT_EQ("asd42", FlattenSlowUntil(nb, "2", 5));
+    ASSERT_EQ("asd4", FlattenSlowUntil(nb, "4", 5));
 }
 
-TEST(NoncontiguousBuffer, FlattenSlowUntil2) {
-  auto nb = CreateBufferSlow(
-      "HTTP/1.1 200 OK\r\nRpc-SeqNo: 14563016719\r\nRpc-Error-Code: "
-      "0\r\nRpc-Error-Reason: The operation completed "
-      "successfully.\r\nContent-Type: "
-      "application/x-protobuf\r\nContent-Length: 0\r\n\r\nHTTP/1.1 200 "
-      "OK\r\nRpc-Seq");
-  ASSERT_EQ("HTTP/1.1 200 OK\r\nRpc-SeqNo: 14563016719\r\nRpc-Error-Code: "
-            "0\r\nRpc-Error-Reason: The operation completed "
-            "successfully.\r\nContent-Type: "
-            "application/x-protobuf\r\nContent-Length: 0\r\n\r\n",
-            FlattenSlowUntil(nb, "\r\n\r\n"));
+TEST(NoncontiguousBuffer, FlattenSlowUntil2)
+{
+    auto nb = CreateBufferSlow(
+        "HTTP/1.1 200 OK\r\nRpc-SeqNo: 14563016719\r\nRpc-Error-Code: "
+        "0\r\nRpc-Error-Reason: The operation completed "
+        "successfully.\r\nContent-Type: "
+        "application/x-protobuf\r\nContent-Length: 0\r\n\r\nHTTP/1.1 200 "
+        "OK\r\nRpc-Seq");
+    ASSERT_EQ("HTTP/1.1 200 OK\r\nRpc-SeqNo: 14563016719\r\nRpc-Error-Code: "
+              "0\r\nRpc-Error-Reason: The operation completed "
+              "successfully.\r\nContent-Type: "
+              "application/x-protobuf\r\nContent-Length: 0\r\n\r\n",
+              FlattenSlowUntil(nb, "\r\n\r\n"));
 }
 
-TEST(NoncontiguousBuffer, FlattenSlowUntil3) {
-  NoncontiguousBuffer nb;
-  nb.Append(MakeNativeBuffer("asd4234"));
-  nb.Append(MakeNativeBuffer("aXsdfsadfasdf2342"));
-  ASSERT_EQ("asd4234aX", FlattenSlowUntil(nb, "aX"));
-  ASSERT_EQ("asd4", FlattenSlowUntil(nb, "4"));
-  ASSERT_EQ("asd4234aX", FlattenSlowUntil(nb, "4aX"));
+TEST(NoncontiguousBuffer, FlattenSlowUntil3)
+{
+    NoncontiguousBuffer nb;
+    nb.Append(MakeNativeBuffer("asd4234"));
+    nb.Append(MakeNativeBuffer("aXsdfsadfasdf2342"));
+    ASSERT_EQ("asd4234aX", FlattenSlowUntil(nb, "aX"));
+    ASSERT_EQ("asd4", FlattenSlowUntil(nb, "4"));
+    ASSERT_EQ("asd4234aX", FlattenSlowUntil(nb, "4aX"));
 }
 
-TEST(NoncontiguousBuffer, FlattenSlowUntil4) {
-  NoncontiguousBuffer nb;
-  nb.Append(MakeNativeBuffer("AB"));
-  nb.Append(MakeNativeBuffer("CDEFGGGGHHHH"));
-  ASSERT_EQ("ABCDEFGGGG", FlattenSlowUntil(nb, "GGGG"));
+TEST(NoncontiguousBuffer, FlattenSlowUntil4)
+{
+    NoncontiguousBuffer nb;
+    nb.Append(MakeNativeBuffer("AB"));
+    nb.Append(MakeNativeBuffer("CDEFGGGGHHHH"));
+    ASSERT_EQ("ABCDEFGGGG", FlattenSlowUntil(nb, "GGGG"));
 }
 
-TEST(NoncontiguousBufferBuilder, Append) {
-  NoncontiguousBufferBuilder nbb;
-  nbb.Append(MakeForeignBuffer(""));
-  nbb.Append(MakeForeignBuffer("small"));
-  nbb.Append(MakeForeignBuffer(std::string(8192, 'a')));
-  nbb.Append(CreateBufferSlow(""));
-  nbb.Append(CreateBufferSlow("small"));
-  nbb.Append(CreateBufferSlow(std::string(8192, 'a')));
-  auto nb = nbb.DestructiveGet();
-  EXPECT_EQ("small" + std::string(8192, 'a') + "small" + std::string(8192, 'a'),
-            FlattenSlow(nb));
+TEST(NoncontiguousBufferBuilder, Append)
+{
+    NoncontiguousBufferBuilder nbb;
+    nbb.Append(MakeForeignBuffer(""));
+    nbb.Append(MakeForeignBuffer("small"));
+    nbb.Append(MakeForeignBuffer(std::string(8192, 'a')));
+    nbb.Append(CreateBufferSlow(""));
+    nbb.Append(CreateBufferSlow("small"));
+    nbb.Append(CreateBufferSlow(std::string(8192, 'a')));
+    auto nb = nbb.DestructiveGet();
+    EXPECT_EQ("small" + std::string(8192, 'a') + "small" + std::string(8192, 'a'), FlattenSlow(nb));
 }
 
-TEST(NoncontiguousBufferBuilder, Reserve) {
-  auto temp_block = MakeNativeBufferBlock();
-  auto max_bytes = temp_block->size();
-  NoncontiguousBufferBuilder nbb;
-  auto ptr = nbb.data();
-  auto ptr2 = nbb.Reserve(10);
-  ASSERT_EQ(ptr, ptr2);
-  ASSERT_EQ(ptr + 10, nbb.data());
-  nbb.Append(std::string(max_bytes - 10 - 1, 'a'));
-  ptr = nbb.data();
-  ptr2 = nbb.Reserve(1); // Last byte in the block.
-  ASSERT_EQ(ptr, ptr2);
-  ASSERT_EQ(max_bytes, nbb.SizeAvailable());
+TEST(NoncontiguousBufferBuilder, Reserve)
+{
+    auto temp_block = MakeNativeBufferBlock();
+    auto max_bytes  = temp_block->size();
+    NoncontiguousBufferBuilder nbb;
+    auto ptr  = nbb.data();
+    auto ptr2 = nbb.Reserve(10);
+    ASSERT_EQ(ptr, ptr2);
+    ASSERT_EQ(ptr + 10, nbb.data());
+    nbb.Append(std::string(max_bytes - 10 - 1, 'a'));
+    ptr  = nbb.data();
+    ptr2 = nbb.Reserve(1);// Last byte in the block.
+    ASSERT_EQ(ptr, ptr2);
+    ASSERT_EQ(max_bytes, nbb.SizeAvailable());
 
-  nbb.Append(std::string(max_bytes - 1, 'a'));
-  ptr = nbb.data();
-  ptr2 = nbb.Reserve(2);
-  ASSERT_NE(ptr, ptr2);
-  ASSERT_EQ(ptr2 + 2, nbb.data());
+    nbb.Append(std::string(max_bytes - 1, 'a'));
+    ptr  = nbb.data();
+    ptr2 = nbb.Reserve(2);
+    ASSERT_NE(ptr, ptr2);
+    ASSERT_EQ(ptr2 + 2, nbb.data());
 }
 
-TEST(NoncontiguousBufferBuilder, DestructiveGet1) {
-  NoncontiguousBufferBuilder nbb;
-  nbb.Append("asdf1234", 6);
-  nbb.Append("1122", 4);
-  ASSERT_EQ("asdf12"
-            "1122",
-            FlattenSlow(nbb.DestructiveGet()));
+TEST(NoncontiguousBufferBuilder, DestructiveGet1)
+{
+    NoncontiguousBufferBuilder nbb;
+    nbb.Append("asdf1234", 6);
+    nbb.Append("1122", 4);
+    ASSERT_EQ("asdf12"
+              "1122",
+              FlattenSlow(nbb.DestructiveGet()));
 }
 
-TEST(NoncontiguousBufferBuilder, DestructiveGet2) {
-  NoncontiguousBufferBuilder nbb;
-  nbb.Append("aabbccd");
-  ASSERT_EQ("aabbccd", FlattenSlow(nbb.DestructiveGet()));
+TEST(NoncontiguousBufferBuilder, DestructiveGet2)
+{
+    NoncontiguousBufferBuilder nbb;
+    nbb.Append("aabbccd");
+    ASSERT_EQ("aabbccd", FlattenSlow(nbb.DestructiveGet()));
 }
 
-TEST(NoncontiguousBufferBuilder, DestructiveGet3) {
-  NoncontiguousBufferBuilder nbb;
-  nbb.Append(std::string(1000000, 'A'));
-  ASSERT_EQ(std::string(1000000, 'A'), FlattenSlow(nbb.DestructiveGet()));
+TEST(NoncontiguousBufferBuilder, DestructiveGet3)
+{
+    NoncontiguousBufferBuilder nbb;
+    nbb.Append(std::string(1000000, 'A'));
+    ASSERT_EQ(std::string(1000000, 'A'), FlattenSlow(nbb.DestructiveGet()));
 }
 
-TEST(NoncontiguousBufferBuilder, DestructiveGet4) {
-  NoncontiguousBufferBuilder nbb;
-  nbb.Append('c');
-  ASSERT_EQ("c", FlattenSlow(nbb.DestructiveGet()));
+TEST(NoncontiguousBufferBuilder, DestructiveGet4)
+{
+    NoncontiguousBufferBuilder nbb;
+    nbb.Append('c');
+    ASSERT_EQ("c", FlattenSlow(nbb.DestructiveGet()));
 }
 
-TEST(NoncontiguousBufferBuilder, DestructiveGet5) {
-  NoncontiguousBufferBuilder nbb;
-  nbb.Append(CreateBufferSlow("c"));
-  ASSERT_EQ("c", FlattenSlow(nbb.DestructiveGet()));
+TEST(NoncontiguousBufferBuilder, DestructiveGet5)
+{
+    NoncontiguousBufferBuilder nbb;
+    nbb.Append(CreateBufferSlow("c"));
+    ASSERT_EQ("c", FlattenSlow(nbb.DestructiveGet()));
 }
 
-TEST(NoncontiguousBufferBuilder, DestructiveGet6) {
-  NoncontiguousBufferBuilder nbb;
-  nbb.Append(Slice("11"), Slice("2"), std::string("3"), std::string("45"),
-             Slice("6"));
-  nbb.Append("1122", 4);
-  ASSERT_EQ("11234561122", FlattenSlow(nbb.DestructiveGet()));
+TEST(NoncontiguousBufferBuilder, DestructiveGet6)
+{
+    NoncontiguousBufferBuilder nbb;
+    nbb.Append(Slice("11"), Slice("2"), std::string("3"), std::string("45"), Slice("6"));
+    nbb.Append("1122", 4);
+    ASSERT_EQ("11234561122", FlattenSlow(nbb.DestructiveGet()));
 }
 
-TEST(MakeReferencingBuffer, Simple) {
-  NoncontiguousBufferBuilder nbb;
-  nbb.Append(MakeReferencingBuffer("abcdefg", 7));
-  EXPECT_EQ("abcdefg", FlattenSlow(nbb.DestructiveGet()));
+TEST(MakeReferencingBuffer, Simple)
+{
+    NoncontiguousBufferBuilder nbb;
+    nbb.Append(MakeReferencingBuffer("abcdefg", 7));
+    EXPECT_EQ("abcdefg", FlattenSlow(nbb.DestructiveGet()));
 }
 
-TEST(MakeReferencingBuffer, WithCallbackSmallBufferOptimized) {
-  int x = 0;
+TEST(MakeReferencingBuffer, WithCallbackSmallBufferOptimized)
+{
+    int x = 0;
 
-  NoncontiguousBufferBuilder nbb;
-  nbb.Append("aaa", 3);
-  // Small buffers are copied by `Append` and freed immediately.
-  nbb.Append(MakeReferencingBuffer("abcdefg", 7, [&] { ++x; }));
-  // Therefore the callback should have fired on return of `Append`.
-  EXPECT_EQ(1, x);
-  auto buffer = nbb.DestructiveGet();
-  EXPECT_EQ("aaaabcdefg", FlattenSlow(buffer));
-}
-
-TEST(MakeReferencingBuffer, WithCallback) {
-  static const std::string kBuffer(12345, 'a');
-  int x = 0;
-
-  {
     NoncontiguousBufferBuilder nbb;
     nbb.Append("aaa", 3);
-    nbb.Append(MakeReferencingBuffer(kBuffer.data(), 1024, [&] { ++x; }));
-    EXPECT_EQ(0, x);
+    // Small buffers are copied by `Append` and freed immediately.
+    nbb.Append(MakeReferencingBuffer("abcdefg", 7, [&] { ++x; }));
+    // Therefore the callback should have fired on return of `Append`.
+    EXPECT_EQ(1, x);
     auto buffer = nbb.DestructiveGet();
-    EXPECT_EQ(0, x);
-    EXPECT_EQ("aaa" + kBuffer.substr(0, 1024), FlattenSlow(buffer));
-  }
-  EXPECT_EQ(1, x);
+    EXPECT_EQ("aaaabcdefg", FlattenSlow(buffer));
 }
 
-TEST(MakeForeignBuffer, String) {
-  NoncontiguousBufferBuilder nbb;
-  nbb.Append(MakeForeignBuffer(std::string("abcdefg")));
-  EXPECT_EQ("abcdefg", FlattenSlow(nbb.DestructiveGet()));
+TEST(MakeReferencingBuffer, WithCallback)
+{
+    static const std::string kBuffer(12345, 'a');
+    int x = 0;
+
+    {
+        NoncontiguousBufferBuilder nbb;
+        nbb.Append("aaa", 3);
+        nbb.Append(MakeReferencingBuffer(kBuffer.data(), 1024, [&] { ++x; }));
+        EXPECT_EQ(0, x);
+        auto buffer = nbb.DestructiveGet();
+        EXPECT_EQ(0, x);
+        EXPECT_EQ("aaa" + kBuffer.substr(0, 1024), FlattenSlow(buffer));
+    }
+    EXPECT_EQ(1, x);
 }
 
-TEST(MakeForeignBuffer, VectorOfChar) {
-  std::vector<char> data{'a', 'b', 'c', 'd', 'e', 'f', 'g'};
-  NoncontiguousBufferBuilder nbb;
-  nbb.Append(MakeForeignBuffer(std::move(data)));
-  EXPECT_EQ("abcdefg", FlattenSlow(nbb.DestructiveGet()));
+TEST(MakeForeignBuffer, String)
+{
+    NoncontiguousBufferBuilder nbb;
+    nbb.Append(MakeForeignBuffer(std::string("abcdefg")));
+    EXPECT_EQ("abcdefg", FlattenSlow(nbb.DestructiveGet()));
+}
+
+TEST(MakeForeignBuffer, VectorOfChar)
+{
+    std::vector<char> data{'a', 'b', 'c', 'd', 'e', 'f', 'g'};
+    NoncontiguousBufferBuilder nbb;
+    nbb.Append(MakeForeignBuffer(std::move(data)));
+    EXPECT_EQ("abcdefg", FlattenSlow(nbb.DestructiveGet()));
 }
 
 // TEST(MakeForeignBuffer, VectorOfBytes) {
@@ -299,13 +327,14 @@ TEST(MakeForeignBuffer, VectorOfChar) {
 //   EXPECT_EQ("abcdefg", FlattenSlow(nbb.DestructiveGet()));
 // }
 
-TEST(MakeForeignBuffer, VectorOfUInt8) {
-  std::vector<std::uint8_t> data;
-  data.resize(7);
-  memcpy(data.data(), "abcdefg", 7);
-  NoncontiguousBufferBuilder nbb;
-  nbb.Append(MakeForeignBuffer(std::move(data)));
-  EXPECT_EQ("abcdefg", FlattenSlow(nbb.DestructiveGet()));
+TEST(MakeForeignBuffer, VectorOfUInt8)
+{
+    std::vector<std::uint8_t> data;
+    data.resize(7);
+    memcpy(data.data(), "abcdefg", 7);
+    NoncontiguousBufferBuilder nbb;
+    nbb.Append(MakeForeignBuffer(std::move(data)));
+    EXPECT_EQ("abcdefg", FlattenSlow(nbb.DestructiveGet()));
 }
 
-} // namespace tile
+}// namespace tile

tile/base/byte_order.h

@@ -41,86 +41,116 @@
 
 namespace tile {
 
-inline uint16_t ByteSwap16(uint16_t val) { return __builtin_bswap16(val); }
-inline uint32_t ByteSwap32(uint32_t val) { return __builtin_bswap32(val); }
-inline uint64_t ByteSwap64(uint64_t val) { return __builtin_bswap64(val); }
+inline uint16_t
+ByteSwap16(uint16_t val)
+{
+    return __builtin_bswap16(val);
+}
 
-inline bool IsHostLittleEndian() {
+inline uint32_t
+ByteSwap32(uint32_t val)
+{
+    return __builtin_bswap32(val);
+}
+
+inline uint64_t
+ByteSwap64(uint64_t val)
+{
+    return __builtin_bswap64(val);
+}
+
+inline bool
+IsHostLittleEndian()
+{
 #if TILE_LITTLE_ENDIAN == TILE_BYTE_ORDER
-  return true;
+    return true;
 #else
-  return false;
+    return false;
 #endif
 }
 
-inline bool IsHostBigEndian() {
+inline bool
+IsHostBigEndian()
+{
 #if TILE_BIG_ENDIAN == TILE_BYTE_ORDER
-  return true;
+    return true;
 #else
-  return false;
+    return false;
 #endif
 }
 
-inline uint16_t HostToNetwork16(uint16_t val_in_host) {
+inline uint16_t
+HostToNetwork16(uint16_t val_in_host)
+{
 #if TILE_BYTE_ORDER == TILE_BIG_ENDIAN
-  return val_in_host;
+    return val_in_host;
 #elif TILE_BYTE_ORDER == TILE_LITTLE_ENDIAN
-  return ByteSwap16(val_in_host);
+    return ByteSwap16(val_in_host);
 #else
 #error "Unsupported byte order"
 #endif
 }
 
-inline uint32_t HostToNetwork32(uint32_t val_in_host) {
+inline uint32_t
+HostToNetwork32(uint32_t val_in_host)
+{
 #if TILE_BYTE_ORDER == TILE_BIG_ENDIAN
-  return val_in_host;
+    return val_in_host;
 #elif TILE_BYTE_ORDER == TILE_LITTLE_ENDIAN
-  return ByteSwap32(val_in_host);
+    return ByteSwap32(val_in_host);
 #else
 #error "Unsupported byte order"
 #endif
 }
 
-inline uint64_t HostToNetwork64(uint64_t val_in_host) {
+inline uint64_t
+HostToNetwork64(uint64_t val_in_host)
+{
 #if TILE_BYTE_ORDER == TILE_BIG_ENDIAN
-  return val_in_host;
+    return val_in_host;
 #elif TILE_BYTE_ORDER == TILE_LITTLE_ENDIAN
-  return ByteSwap64(val_in_host);
+    return ByteSwap64(val_in_host);
 #else
 #error "Unsupported byte order"
 #endif
 }
 
-inline uint16_t NetworkToHost16(uint16_t val_in_network) {
+inline uint16_t
+NetworkToHost16(uint16_t val_in_network)
+{
 #if TILE_BYTE_ORDER == TILE_BIG_ENDIAN
-  return val_in_network;
+    return val_in_network;
 #elif TILE_BYTE_ORDER == TILE_LITTLE_ENDIAN
-  return ByteSwap16(val_in_network);
+    return ByteSwap16(val_in_network);
 #else
 #error "Unsupported byte order"
 #endif
 }
 
-inline uint32_t NetworkToHost32(uint32_t val_in_network) {
+inline uint32_t
+NetworkToHost32(uint32_t val_in_network)
+{
 #if TILE_BYTE_ORDER == TILE_BIG_ENDIAN
-  return val_in_network;
+    return val_in_network;
 #elif TILE_BYTE_ORDER == TILE_LITTLE_ENDIAN
-  return ByteSwap32(val_in_network);
+    return ByteSwap32(val_in_network);
 #else
 #error "Unsupported byte order"
 #endif
 }
 
-inline uint64_t NetworkToHost64(uint64_t val_in_network) {
+inline uint64_t
+NetworkToHost64(uint64_t val_in_network)
+{
 #if TILE_BYTE_ORDER == TILE_BIG_ENDIAN
-  return val_in_network;
+    return val_in_network;
 #elif TILE_BYTE_ORDER == TILE_LITTLE_ENDIAN
-  return ByteSwap64(val_in_network);
+    return ByteSwap64(val_in_network);
 #else
 #error "Unsupported byte order"
 #endif
 }
 
-} // namespace tile
+}// namespace tile
 
-#endif // TILE_BASE_BYTE_ORDER_H
+#endif// TILE_BASE_BYTE_ORDER_H

tile/base/byte_order_test.cc

@@ -8,109 +8,123 @@
 namespace tile {
 
 static union EndianHelper {
-  uint16_t v16;
-  uint32_t v32;
-  uint32_t v64;
-  uint8_t bytes[8];
-} endian_helper = {.bytes = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07}};
+    uint16_t v16;
+    uint32_t v32;
+    uint32_t v64;
+    uint8_t bytes[8];
+} endian_helper = {
+    .bytes = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07}
+};
 
-TEST(ByteOrder, ByteSwap16) {
-  const uint16_t val = 0x1234;
-  const uint16_t expected = 0x3412;
-  ASSERT_EQ(expected, ByteSwap16(val));
-}
-TEST(ByteOrder, ByteSwap32) {
-  const uint32_t val = 0x12345678;
-  const uint32_t expected = 0x78563412;
-  ASSERT_EQ(expected, ByteSwap32(val));
-}
-TEST(ByteOrder, ByteSwap64) {
-  const uint64_t val = 0x1234567890abcdef;
-  const uint64_t expected = 0xefcdab9078563412;
-  ASSERT_EQ(expected, ByteSwap64(val));
+TEST(ByteOrder, ByteSwap16)
+{
+    const uint16_t val      = 0x1234;
+    const uint16_t expected = 0x3412;
+    ASSERT_EQ(expected, ByteSwap16(val));
 }
 
-TEST(ByteOrder, IsHostByteOrder) {
-  ASSERT_NE(IsHostBigEndian(), IsHostLittleEndian());
+TEST(ByteOrder, ByteSwap32)
+{
+    const uint32_t val      = 0x12345678;
+    const uint32_t expected = 0x78563412;
+    ASSERT_EQ(expected, ByteSwap32(val));
+}
+
+TEST(ByteOrder, ByteSwap64)
+{
+    const uint64_t val      = 0x1234567890abcdef;
+    const uint64_t expected = 0xefcdab9078563412;
+    ASSERT_EQ(expected, ByteSwap64(val));
+}
+
+TEST(ByteOrder, IsHostByteOrder)
+{
+    ASSERT_NE(IsHostBigEndian(), IsHostLittleEndian());
 #if TILE_BYTE_ORDER == TILE_BIG_ENDIAN
-  ASSERT_TRUE(IsHostBigEndian());
-  ASSERT_FALSE(IsHostLittleEndian());
+    ASSERT_TRUE(IsHostBigEndian());
+    ASSERT_FALSE(IsHostLittleEndian());
 #else
-  ASSERT_TRUE(IsHostLittleEndian());
-  ASSERT_FALSE(IsHostBigEndian());
+    ASSERT_TRUE(IsHostLittleEndian());
+    ASSERT_FALSE(IsHostBigEndian());
 #endif
 }
 
-TEST(ByteOrder, HostToNetwork16) {
-  const uint16_t val = 0x1234;
+TEST(ByteOrder, HostToNetwork16)
+{
+    const uint16_t val = 0x1234;
 #if TILE_BYTE_ORDER == TILE_BIG_ENDIAN
-  const uint16_t expected = val;
+    const uint16_t expected = val;
 #elif TILE_BYTE_ORDER == TILE_LITTLE_ENDIAN
-  const uint16_t expected = 0x3412;
+    const uint16_t expected = 0x3412;
 #else
 #error "Unsupported byte order"
 #endif
-  ASSERT_EQ(expected, HostToNetwork16(val));
+    ASSERT_EQ(expected, HostToNetwork16(val));
 }
 
-TEST(ByteOrder, HostToNetwork32) {
-  const uint32_t val = 0x12345678;
+TEST(ByteOrder, HostToNetwork32)
+{
+    const uint32_t val = 0x12345678;
 #if TILE_BYTE_ORDER == TILE_BIG_ENDIAN
-  const uint32_t expected = val;
+    const uint32_t expected = val;
 #elif TILE_BYTE_ORDER == TILE_LITTLE_ENDIAN
-  const uint32_t expected = 0x78563412;
+    const uint32_t expected = 0x78563412;
 #else
 #error "Unsupported byte order"
 #endif
-  ASSERT_EQ(expected, HostToNetwork32(val));
+    ASSERT_EQ(expected, HostToNetwork32(val));
 }
 
-TEST(ByteOrder, HostToNetwork64) {
-  const uint64_t val = 0x1234567890abcdef;
+TEST(ByteOrder, HostToNetwork64)
+{
+    const uint64_t val = 0x1234567890abcdef;
 #if TILE_BYTE_ORDER == TILE_BIG_ENDIAN
-  const uint64_t expected = val;
+    const uint64_t expected = val;
 #elif TILE_BYTE_ORDER == TILE_LITTLE_ENDIAN
-  const uint64_t expected = 0xefcdab9078563412;
+    const uint64_t expected = 0xefcdab9078563412;
 #else
 #error "Unsupported byte order"
 #endif
-  ASSERT_EQ(expected, HostToNetwork64(val));
+    ASSERT_EQ(expected, HostToNetwork64(val));
 }
 
-TEST(ByteOrder, NetworkToHost16) {
-  const uint16_t val = 0x1234;
+TEST(ByteOrder, NetworkToHost16)
+{
+    const uint16_t val = 0x1234;
 #if TILE_BYTE_ORDER == TILE_BIG_ENDIAN
-  const uint16_t expected = val;
+    const uint16_t expected = val;
 #elif TILE_BYTE_ORDER == TILE_LITTLE_ENDIAN
-  const uint16_t expected = 0x3412;
+    const uint16_t expected = 0x3412;
 #else
 #error "Unsupported byte order"
 #endif
-  ASSERT_EQ(expected, NetworkToHost16(val));
+    ASSERT_EQ(expected, NetworkToHost16(val));
 }
 
-TEST(ByteOrder, NetworkToHost32) {
-  const uint32_t val = 0x12345678;
+TEST(ByteOrder, NetworkToHost32)
+{
+    const uint32_t val = 0x12345678;
 #if TILE_BYTE_ORDER == TILE_BIG_ENDIAN
-  const uint32_t expected = val;
+    const uint32_t expected = val;
 #elif TILE_BYTE_ORDER == TILE_LITTLE_ENDIAN
-  const uint32_t expected = 0x78563412;
+    const uint32_t expected = 0x78563412;
 #else
 #error "Unsupported byte order"
 #endif
-  ASSERT_EQ(expected, NetworkToHost32(val));
+    ASSERT_EQ(expected, NetworkToHost32(val));
 }
 
-TEST(ByteOrder, NetworkToHost64) {
-  const uint64_t val = 0x1234567890abcdef;
+TEST(ByteOrder, NetworkToHost64)
+{
+    const uint64_t val = 0x1234567890abcdef;
 #if TILE_BYTE_ORDER == TILE_BIG_ENDIAN
-  const uint64_t expected = val;
+    const uint64_t expected = val;
 #elif TILE_BYTE_ORDER == TILE_LITTLE_ENDIAN
-  const uint64_t expected = 0xefcdab9078563412;
+    const uint64_t expected = 0xefcdab9078563412;
 #else
 #error "Unsupported byte order"
 #endif
-  ASSERT_EQ(expected, NetworkToHost64(val));
+    ASSERT_EQ(expected, NetworkToHost64(val));
 }
 
-} // namespace tile
+}// namespace tile

tile/base/casting.h

@@ -12,178 +12,200 @@
 namespace tile {
 namespace detail {
 // Has classof
-template <typename T, typename Base> struct HasClassofImpl {
-  template <
-      typename TT, typename TBase,
-      typename = enable_if_t<std::is_same<
-          decltype(TT::classof(std::declval<const TBase &>())), bool>::value>>
-  static std::true_type test(int);
-  template <typename TT, typename TBase> static std::false_type test(...);
+template<typename T, typename Base>
+struct HasClassofImpl {
+    template<typename TT,
+             typename TBase,
+             typename = enable_if_t<std::is_same<decltype(TT::classof(std::declval<const TBase &>())), bool>::value>>
+    static std::true_type test(int);
+    template<typename TT, typename TBase>
+    static std::false_type test(...);
 
-  static constexpr bool value = decltype(test<T, Base>(0))::value;
+    static constexpr bool value = decltype(test<T, Base>(0))::value;
 };
-} // namespace detail
+}// namespace detail
 
-template <typename T, typename = void> struct CastingTraits {
-  template <typename Base>
-  static auto RuntimeTypeCheck(const Base &val)
-      -> enable_if_t<detail::HasClassofImpl<T, Base>::value, bool> {
-    return T::classof(val);
-  }
+template<typename T, typename = void>
+struct CastingTraits {
+    template<typename Base>
+    static auto RuntimeTypeCheck(const Base &val) -> enable_if_t<detail::HasClassofImpl<T, Base>::value, bool>
+    {
+        return T::classof(val);
+    }
 
-  template <typename Base>
-  static auto RuntimeTypeCheck(const Base &val)
-      -> enable_if_t<!detail::HasClassofImpl<T, Base>::value, bool> {
-    return dynamic_cast<const T *>(&val) != nullptr;
-  }
+    template<typename Base>
+    static auto RuntimeTypeCheck(const Base &val) -> enable_if_t<!detail::HasClassofImpl<T, Base>::value, bool>
+    {
+        return dynamic_cast<const T *>(&val) != nullptr;
+    }
 };
 
 class Castable {
-  class Dummy {};
+    class Dummy {};
 
 public:
-  friend void SetRuntimeType(Castable *ptr, int type, Dummy = {}) {
-    ptr->type_ = type;
-  }
+    friend void SetRuntimeType(Castable *ptr, int type, Dummy = {}) { ptr->type_ = type; }
 
-  friend int GetRuntimeType(const Castable &val, Dummy = {}) {
-    return val.type_;
-  }
+    friend int GetRuntimeType(const Castable &val, Dummy = {}) { return val.type_; }
 
 protected:
-  template <typename, typename> friend struct CastingTraits;
-  ~Castable() = default;
+    template<typename, typename>
+    friend struct CastingTraits;
+    ~Castable() = default;
 
-  template <typename T> void SetRuntimeTypeTo() {
-    SetRuntimeType(this, GetRuntimeTypeId<T>());
-  }
+    template<typename T>
+    void SetRuntimeTypeTo()
+    {
+        SetRuntimeType(this, GetRuntimeTypeId<T>());
+    }
 
-  template <typename T> int GetRuntimeType() const {
-    return GetRuntimeTypeId<T>();
-  }
+    template<typename T>
+    int GetRuntimeType() const
+    {
+        return GetRuntimeTypeId<T>();
+    }
 
-  template <typename T> static int GetRuntimeTypeId() {
-    static const int value = internal::IndexAlloc::For<Castable>()->Next();
-    return value;
-  }
+    template<typename T>
+    static int GetRuntimeTypeId()
+    {
+        static const int value = internal::IndexAlloc::For<Castable>()->Next();
+        return value;
+    }
 
 private:
-  std::int_fast32_t type_ = GetRuntimeTypeId<Castable>();
+    std::int_fast32_t type_ = GetRuntimeTypeId<Castable>();
 };
 
 // ExactMatchCastable
 class ExactMatchCastable : public Castable {
 protected:
-  ~ExactMatchCastable() = default;
+    ~ExactMatchCastable() = default;
 };
 
-template <typename T>
-struct CastingTraits<
-    T, enable_if_t<std::is_base_of<ExactMatchCastable, T>::value>> {
-  static bool RuntimeTypeCheck(const ExactMatchCastable &object) {
-    return GetRuntimeType(object) == Castable::GetRuntimeTypeId<T>();
-  }
+template<typename T>
+struct CastingTraits<T, enable_if_t<std::is_base_of<ExactMatchCastable, T>::value>> {
+    static bool RuntimeTypeCheck(const ExactMatchCastable &object)
+    {
+        return GetRuntimeType(object) == Castable::GetRuntimeTypeId<T>();
+    }
 };
 
 namespace casting {
 namespace detail {
-template <typename T, typename Base,
-          typename = enable_if_t<std::is_base_of<Base, T>::value &&
-                                 !std::is_same<Base, T>::value>>
-inline bool RuntimeTypeCheck(const Base &val) {
-  return CastingTraits<T>::RuntimeTypeCheck(val);
+template<typename T,
+         typename Base,
+         typename = enable_if_t<std::is_base_of<Base, T>::value && !std::is_same<Base, T>::value>>
+inline bool
+RuntimeTypeCheck(const Base &val)
+{
+    return CastingTraits<T>::RuntimeTypeCheck(val);
 }
 
-template <typename T> inline bool RuntimeTypeCheck(const T &val) {
-  return true;
+template<typename T>
+inline bool
+RuntimeTypeCheck(const T &val)
+{
+    return true;
 }
 
-template <typename T, typename Base>
-using casted_type_t =
-    internal::conditional_t<std::is_const<Base>::value, const T *, T *>;
+template<typename T, typename Base>
+using casted_type_t = internal::conditional_t<std::is_const<Base>::value, const T *, T *>;
 
-template <typename T, typename Base>
-auto ReallyCastable(Base *ptr)
-    -> enable_if_t<std::has_virtual_destructor<T>::value, bool> {
-  return dynamic_cast<const T *>(ptr) != nullptr;
-}
-template <typename T, typename Base>
-auto ReallyCastable(Base *ptr)
-    -> enable_if_t<!std::has_virtual_destructor<T>::value, bool> {
-  return typeid(T) == typeid(*ptr);
+template<typename T, typename Base>
+auto
+ReallyCastable(Base *ptr) -> enable_if_t<std::has_virtual_destructor<T>::value, bool>
+{
+    return dynamic_cast<const T *>(ptr) != nullptr;
 }
 
-template <typename T, typename Base> void InvalidCast(Base *ptr) {
-  if (ReallyCastable<T, Base>(ptr)) {
-    TILE_LOG_FATAL(
-        "Casting to type [{}] failed. However, the C++ runtime reports that "
-        "you're indeed casting to the (right) runtime type of the object. This "
-        "can happen when either: 1) you haven't initialize object's runtime "
-        "type correctly (e.g. via `SetRuntimeTypeTo` if you're inheriting from "
-        "`ExactMatchCast`), or 2) the implementation of your `classof` is "
-        "incorrect.",
-        GetTypeName<T>());
-  } else {
-    TILE_LOG_FATAL(
-        "Invalid cast: Runtime type [{}] expected, got [{}]. If you believe "
-        "this is an error, check if your `classof` is implemented correctly",
-        GetTypeName<T>(), GetTypeName(*ptr));
-  }
-  TILE_UNREACHABLE("");
+template<typename T, typename Base>
+auto
+ReallyCastable(Base *ptr) -> enable_if_t<!std::has_virtual_destructor<T>::value, bool>
+{
+    return typeid(T) == typeid(*ptr);
 }
 
-} // namespace detail
-} // namespace casting
-
-template <typename T, typename Base,
-          typename = enable_if_t<!std::is_pointer<Base>::value>>
-inline bool isa(const Base &val) {
-  return casting::detail::RuntimeTypeCheck<T>(val);
+template<typename T, typename Base>
+void
+InvalidCast(Base *ptr)
+{
+    if (ReallyCastable<T, Base>(ptr)) {
+        TILE_LOG_FATAL("Casting to type [{}] failed. However, the C++ runtime reports that "
+                       "you're indeed casting to the (right) runtime type of the object. This "
+                       "can happen when either: 1) you haven't initialize object's runtime "
+                       "type correctly (e.g. via `SetRuntimeTypeTo` if you're inheriting from "
+                       "`ExactMatchCast`), or 2) the implementation of your `classof` is "
+                       "incorrect.",
+                       GetTypeName<T>());
+    } else {
+        TILE_LOG_FATAL("Invalid cast: Runtime type [{}] expected, got [{}]. If you believe "
+                       "this is an error, check if your `classof` is implemented correctly",
+                       GetTypeName<T>(), GetTypeName(*ptr));
+    }
+    TILE_UNREACHABLE("");
 }
 
-template <typename T, typename Base> inline bool isa(const Base *val) {
-  return isa<T>(*val);
+}// namespace detail
+}// namespace casting
+
+template<typename T, typename Base, typename = enable_if_t<!std::is_pointer<Base>::value>>
+inline bool
+isa(const Base &val)
+{
+    return casting::detail::RuntimeTypeCheck<T>(val);
 }
 
-template <typename T, typename Base,
-          typename R = casting::detail::casted_type_t<T, Base>>
-R dyn_cast(Base *ptr) {
-  return isa<T>(ptr) ? static_cast<R>(ptr) : nullptr;
+template<typename T, typename Base>
+inline bool
+isa(const Base *val)
+{
+    return isa<T>(*val);
 }
 
-template <typename T, typename Base,
-          typename = enable_if_t<!std::is_pointer<Base>::value>>
+template<typename T, typename Base, typename R = casting::detail::casted_type_t<T, Base>>
+R
+dyn_cast(Base *ptr)
+{
+    return isa<T>(ptr) ? static_cast<R>(ptr) : nullptr;
+}
+
+template<typename T, typename Base, typename = enable_if_t<!std::is_pointer<Base>::value>>
 inline auto
-dyn_cast(Base &val) -> decltype(dyn_cast<T>(std::declval<Base *>())) {
-  return dyn_cast<T>(&val);
+dyn_cast(Base &val) -> decltype(dyn_cast<T>(std::declval<Base *>()))
+{
+    return dyn_cast<T>(&val);
 }
 
-template <typename T, typename Base>
-inline auto dyn_cast_or_null(Base *ptr) -> decltype(dyn_cast<T>(ptr)) {
-  return ptr ? dyn_cast<T>(ptr) : nullptr;
+template<typename T, typename Base>
+inline auto
+dyn_cast_or_null(Base *ptr) -> decltype(dyn_cast<T>(ptr))
+{
+    return ptr ? dyn_cast<T>(ptr) : nullptr;
 }
 
-template <typename T, typename Base,
-          typename R = casting::detail::casted_type_t<T, Base>>
-inline R cast(Base *ptr) {
-  if (TILE_LIKELY(isa<T>(ptr))) {
-    return static_cast<R>(ptr);
-  }
-  casting::detail::InvalidCast<T>(ptr);
-  return nullptr;
+template<typename T, typename Base, typename R = casting::detail::casted_type_t<T, Base>>
+inline R
+cast(Base *ptr)
+{
+    if (TILE_LIKELY(isa<T>(ptr))) { return static_cast<R>(ptr); }
+    casting::detail::InvalidCast<T>(ptr);
+    return nullptr;
 }
 
-template <typename T, typename Base,
-          typename = enable_if_t<!std::is_pointer<Base>::value>>
-inline auto cast(Base &val) -> decltype(cast<T>(std::declval<Base *>())) {
-  return cast<T>(&val);
+template<typename T, typename Base, typename = enable_if_t<!std::is_pointer<Base>::value>>
+inline auto
+cast(Base &val) -> decltype(cast<T>(std::declval<Base *>()))
+{
+    return cast<T>(&val);
 }
 
-template <typename T, typename Base>
-inline auto cast_or_null(Base *ptr) -> decltype(cast<T>(ptr)) {
-  return ptr ? cast<T>(ptr) : nullptr;
+template<typename T, typename Base>
+inline auto
+cast_or_null(Base *ptr) -> decltype(cast<T>(ptr))
+{
+    return ptr ? cast<T>(ptr) : nullptr;
 }
 
-} // namespace tile
+}// namespace tile
 
-#endif // TILE_BASE_CASTING_H
+#endif// TILE_BASE_CASTING_H

tile/base/casting_benchmark.cc

@@ -7,64 +7,63 @@
 namespace tile {
 
 struct Base {
-  virtual ~Base() = default;
-  enum { kA, kB, kC [[maybe_unused]] } type;
+    virtual ~Base() = default;
+
+    enum { kA, kB, kC [[maybe_unused]] } type;
 };
 
 struct A : Base {
-  A() { type = kA; }
+    A() { type = kA; }
 
-  static bool classof(const Base &val) {
-    return val.type == kA || val.type == kB;
-  }
+    static bool classof(const Base &val) { return val.type == kA || val.type == kB; }
 };
 
 struct B : A {
-  B() { type = kB; }
+    B() { type = kB; }
 
-  static bool classof(const Base &val) { return val.type == kB; }
+    static bool classof(const Base &val) { return val.type == kB; }
 };
 
-auto pb = make_unique<B>();
+auto pb   = make_unique<B>();
 Base *ptr = pb.get();
 volatile A *converted_ptr;
 
 struct C1 : ExactMatchCastable {};
 
 struct C2 : C1 {
-  C2() { SetRuntimeType(this, GetRuntimeTypeId<C2>()); }
+    C2() { SetRuntimeType(this, GetRuntimeTypeId<C2>()); }
 };
 
 struct C3 : C1 {
-  C3() { SetRuntimeType(this, GetRuntimeTypeId<C3>()); }
+    C3() { SetRuntimeType(this, GetRuntimeTypeId<C3>()); }
 };
 
 auto pc2 = make_unique<C2>();
-C1 *pc1 = pc2.get();
+C1 *pc1  = pc2.get();
 volatile C3 *pc3;
 
-void Benchmark_BuiltinDynamicCast(benchmark::State &state) {
-  while (state.KeepRunning()) {
-    converted_ptr = dynamic_cast<A *>(ptr);
-  }
+void
+Benchmark_BuiltinDynamicCast(benchmark::State &state)
+{
+    while (state.KeepRunning()) { converted_ptr = dynamic_cast<A *>(ptr); }
 }
 
 BENCHMARK(Benchmark_BuiltinDynamicCast);
 
-void Benchmark_DynCast(benchmark::State &state) {
-  while (state.KeepRunning()) {
-    converted_ptr = dyn_cast<A>(ptr);
-  }
+void
+Benchmark_DynCast(benchmark::State &state)
+{
+    while (state.KeepRunning()) { converted_ptr = dyn_cast<A>(ptr); }
 }
 
 BENCHMARK(Benchmark_DynCast);
 
-void Benchmark_ExactMatchCastableDynCast(benchmark::State &state) {
-  while (state.KeepRunning()) {
-    pc3 = dyn_cast<C3>(pc1);
-  }
+void
+Benchmark_ExactMatchCastableDynCast(benchmark::State &state)
+{
+    while (state.KeepRunning()) { pc3 = dyn_cast<C3>(pc1); }
 }
 
 BENCHMARK(Benchmark_ExactMatchCastableDynCast);
 
-} // namespace tile
+}// namespace tile

tile/base/casting_test.cc

@@ -9,95 +9,99 @@
 namespace tile {
 
 struct Base {
-  enum { kA, kB, kC } type;
+    enum { kA, kB, kC } type;
 };
 
 struct A : Base {
-  A() { type = kA; }
+    A() { type = kA; }
 
-  static bool classof(const Base &val) {
-    return val.type == kA || val.type == kB;
-  }
+    static bool classof(const Base &val) { return val.type == kA || val.type == kB; }
 };
 
 struct B : A {
-  B() { type = kB; }
+    B() { type = kB; }
 
-  static bool classof(const Base &val) { return val.type == kB; }
+    static bool classof(const Base &val) { return val.type == kB; }
 };
 
 struct C : Base {
-  C() { type = kC; }
+    C() { type = kC; }
 
-  static bool classof(const Base &val) { return val.type == kC; }
+    static bool classof(const Base &val) { return val.type == kC; }
 };
 
 struct C1 : ExactMatchCastable {};
 
 struct C2 : C1 {
-  C2() { SetRuntimeType(this, GetRuntimeTypeId<C2>()); }
+    C2() { SetRuntimeType(this, GetRuntimeTypeId<C2>()); }
 };
 
 struct C3 : C1 {
-  C3() { SetRuntimeType(this, GetRuntimeTypeId<C3>()); }
+    C3() { SetRuntimeType(this, GetRuntimeTypeId<C3>()); }
 };
 
-TEST(CastingDeathTest, InvalidCast) {
-  auto pa = make_unique<A>();
-  ASSERT_DEATH(cast<B>(pa.get()), "Invalid cast");
+TEST(CastingDeathTest, InvalidCast)
+{
+    auto pa = make_unique<A>();
+    ASSERT_DEATH(cast<B>(pa.get()), "Invalid cast");
 }
 
-TEST(Casting, Nullptr) {
-  B *pb = nullptr;
-  ASSERT_EQ(nullptr, dyn_cast_or_null<A>(pb));
-  ASSERT_EQ(nullptr, cast_or_null<A>(pb));
+TEST(Casting, Nullptr)
+{
+    B *pb = nullptr;
+    ASSERT_EQ(nullptr, dyn_cast_or_null<A>(pb));
+    ASSERT_EQ(nullptr, cast_or_null<A>(pb));
 }
 
-TEST(Casting, DownCastFailure) {
-  auto pa = make_unique<A>();
-  ASSERT_EQ(nullptr, dyn_cast<B>(pa.get()));
+TEST(Casting, DownCastFailure)
+{
+    auto pa = make_unique<A>();
+    ASSERT_EQ(nullptr, dyn_cast<B>(pa.get()));
 }
 
-TEST(Casting, Cast) {
-  auto pb = make_unique<B>();
-  Base *ptr = pb.get();
+TEST(Casting, Cast)
+{
+    auto pb   = make_unique<B>();
+    Base *ptr = pb.get();
 
-  ASSERT_NE(nullptr, dyn_cast<Base>(ptr));
-  ASSERT_NE(nullptr, dyn_cast<A>(ptr));
-  ASSERT_NE(nullptr, dyn_cast<B>(ptr));
+    ASSERT_NE(nullptr, dyn_cast<Base>(ptr));
+    ASSERT_NE(nullptr, dyn_cast<A>(ptr));
+    ASSERT_NE(nullptr, dyn_cast<B>(ptr));
 
-  ASSERT_NE(nullptr, cast<A>(ptr));  // Casting pointer.
-  ASSERT_NE(nullptr, cast<B>(ptr));  // Casting pointer.
-  ASSERT_NE(nullptr, cast<A>(*ptr)); // Casting pointer.
-  ASSERT_NE(nullptr, cast<B>(*ptr)); // Casting pointer.
+    ASSERT_NE(nullptr, cast<A>(ptr)); // Casting pointer.
+    ASSERT_NE(nullptr, cast<B>(ptr)); // Casting pointer.
+    ASSERT_NE(nullptr, cast<A>(*ptr));// Casting pointer.
+    ASSERT_NE(nullptr, cast<B>(*ptr));// Casting pointer.
 
-  ASSERT_NE(nullptr, dyn_cast<B>(pb.get())); // Cast to self.
-  ASSERT_EQ(nullptr, dyn_cast<C>(ptr));      // Cast failure.
+    ASSERT_NE(nullptr, dyn_cast<B>(pb.get()));// Cast to self.
+    ASSERT_EQ(nullptr, dyn_cast<C>(ptr));     // Cast failure.
 }
 
-TEST(Casting, CastWithConst) {
-  auto pb = make_unique<const B>();
-  const Base *ptr = pb.get();
+TEST(Casting, CastWithConst)
+{
+    auto pb         = make_unique<const B>();
+    const Base *ptr = pb.get();
 
-  ASSERT_NE(nullptr, dyn_cast<Base>(ptr));
-  ASSERT_NE(nullptr, dyn_cast<A>(ptr));
-  ASSERT_NE(nullptr, dyn_cast<B>(ptr));
+    ASSERT_NE(nullptr, dyn_cast<Base>(ptr));
+    ASSERT_NE(nullptr, dyn_cast<A>(ptr));
+    ASSERT_NE(nullptr, dyn_cast<B>(ptr));
 
-  ASSERT_NE(nullptr, cast<A>(ptr));  // Casting pointer.
-  ASSERT_NE(nullptr, cast<B>(ptr));  // Casting pointer.
-  ASSERT_NE(nullptr, cast<A>(*ptr)); // Casting pointer.
-  ASSERT_NE(nullptr, cast<B>(*ptr)); // Casting pointer.
+    ASSERT_NE(nullptr, cast<A>(ptr)); // Casting pointer.
+    ASSERT_NE(nullptr, cast<B>(ptr)); // Casting pointer.
+    ASSERT_NE(nullptr, cast<A>(*ptr));// Casting pointer.
+    ASSERT_NE(nullptr, cast<B>(*ptr));// Casting pointer.
 
-  ASSERT_NE(nullptr, dyn_cast<B>(pb.get())); // Cast to self.
-  ASSERT_EQ(nullptr, dyn_cast<C>(ptr));      // Cast failure.
+    ASSERT_NE(nullptr, dyn_cast<B>(pb.get()));// Cast to self.
+    ASSERT_EQ(nullptr, dyn_cast<C>(ptr));     // Cast failure.
 }
 
-TEST(Casting, ExactMatchCastable) {
-  auto pc2 = make_unique<C2>();
-  C1 *p = pc2.get();
-  ASSERT_NE(nullptr, dyn_cast<C1>(p)); // Success.
-  ASSERT_NE(nullptr, dyn_cast<C2>(p)); // Success.
-  ASSERT_EQ(nullptr, dyn_cast<C3>(p)); // Failure.
+TEST(Casting, ExactMatchCastable)
+{
+    auto pc2 = make_unique<C2>();
+    C1 *p    = pc2.get();
+    ASSERT_NE(nullptr, dyn_cast<C1>(p));// Success.
+    ASSERT_NE(nullptr, dyn_cast<C2>(p));// Success.
+    ASSERT_EQ(nullptr, dyn_cast<C3>(p));// Failure.
 }
 
-} // namespace tile
+}// namespace tile

tile/base/chrono.cc

@@ -15,132 +15,150 @@
 namespace tile {
 namespace {
 
-template <typename T> struct Epoch {};
-template <> struct Epoch<std::chrono::steady_clock> {
-  static constexpr auto value =
-      std::chrono::duration_cast<std::chrono::nanoseconds>(
-          std::chrono::seconds(0));
+template<typename T>
+struct Epoch {};
+
+template<>
+struct Epoch<std::chrono::steady_clock> {
+    static constexpr auto value = std::chrono::duration_cast<std::chrono::nanoseconds>(std::chrono::seconds(0));
 };
 
-template <> struct Epoch<std::chrono::system_clock> {
-  static constexpr auto value =
-      std::chrono::duration_cast<std::chrono::nanoseconds>(
-          std::chrono::seconds(1716543273));
+template<>
+struct Epoch<std::chrono::system_clock> {
+    static constexpr auto value =
+        std::chrono::duration_cast<std::chrono::nanoseconds>(std::chrono::seconds(1716543273));
 };
 
-template <typename Clock>
-inline typename Clock::time_point ReadClock(clockid_t type) {
-  timespec ts;
-  clock_gettime(type, &ts);
-  const long long ns = ts.tv_sec * 1000LL * 1000LL * 1000LL + ts.tv_nsec;
-  auto duration = std::chrono::duration_cast<typename Clock::duration>(
-      std::chrono::nanoseconds(ns));
-  return typename Clock::time_point(duration);
+template<typename Clock>
+inline typename Clock::time_point
+ReadClock(clockid_t type)
+{
+    timespec ts;
+    clock_gettime(type, &ts);
+    const long long ns = ts.tv_sec * 1000LL * 1000LL * 1000LL + ts.tv_nsec;
+    auto duration      = std::chrono::duration_cast<typename Clock::duration>(std::chrono::nanoseconds(ns));
+    return typename Clock::time_point(duration);
 }
 
-void Sleep(long ns) {
-  struct timeval timeout;
-  timeout.tv_sec = 0;
-  timeout.tv_usec = (ns + 999) / 1000;
+void
+Sleep(long ns)
+{
+    struct timeval timeout;
+    timeout.tv_sec  = 0;
+    timeout.tv_usec = (ns + 999) / 1000;
 
-  select(0, NULL, NULL, NULL, &timeout);
+    select(0, NULL, NULL, NULL, &timeout);
 }
 
-} // namespace
+}// namespace
+
 namespace detail {
 namespace chrono {
-struct alignas(hardware_destructive_interference_size)
-    AsynchronouslyUpdatedTimestamps {
-  std::atomic<std::chrono::nanoseconds> steady_clock_time_since_epoch;
-  std::atomic<std::chrono::nanoseconds> system_clock_time_since_epoch;
+struct alignas(hardware_destructive_interference_size) AsynchronouslyUpdatedTimestamps {
+    std::atomic<std::chrono::nanoseconds> steady_clock_time_since_epoch;
+    std::atomic<std::chrono::nanoseconds> system_clock_time_since_epoch;
 };
+
 static AsynchronouslyUpdatedTimestamps async_updated_timestamps;
 
-void UpdateCoarseTimestamps() {
-  async_updated_timestamps.steady_clock_time_since_epoch.store(
-      ReadSteadyClock().time_since_epoch(),
-      // std::chrono::steady_clock::now().time_since_epoch(),
-      std::memory_order_relaxed);
-  async_updated_timestamps.system_clock_time_since_epoch.store(
-      ReadSystemClock().time_since_epoch(),
-      // std::chrono::system_clock::now().time_since_epoch(),
-      std::memory_order_relaxed);
+void
+UpdateCoarseTimestamps()
+{
+    async_updated_timestamps.steady_clock_time_since_epoch.store(
+        ReadSteadyClock().time_since_epoch(),
+        // std::chrono::steady_clock::now().time_since_epoch(),
+        std::memory_order_relaxed);
+    async_updated_timestamps.system_clock_time_since_epoch.store(
+        ReadSystemClock().time_since_epoch(),
+        // std::chrono::system_clock::now().time_since_epoch(),
+        std::memory_order_relaxed);
 }
+
 constexpr std::chrono::microseconds CoarseClockInitializer::kAccuracy;
-CoarseClockInitializer *CoarseClockInitializer::Instance() {
-  static NeverDestroyedSingleton<CoarseClockInitializer> cci;
-  return cci.Get();
+
+CoarseClockInitializer *
+CoarseClockInitializer::Instance()
+{
+    static NeverDestroyedSingleton<CoarseClockInitializer> cci;
+    return cci.Get();
 }
 
-void CoarseClockInitializer::Start() {
-  if (!internal::TestAndSet(running_, false, true)) {
-    TILE_LOG_WARNING("CoarseClockInitializer is already running");
-    return;
-  }
-
-  UpdateCoarseTimestamps();
-
-  worker_ = make_unique<std::thread>([this] {
-    const auto accuracy_as_ns =
-        std::chrono::duration_cast<std::chrono::nanoseconds>(kAccuracy).count();
-    TILE_CHECK_GE(accuracy_as_ns, 2000,
-                  "accuracy is too small, MUST GE 2000ns, current is {}",
-                  kAccuracy);
-
-    while (running_.load(std::memory_order_relaxed)) {
-      // std::this_thread::sleep_for(std::chrono::nanoseconds(500));
-      UpdateCoarseTimestamps();
-      // Sleep(accuracy_as_ns / 2);
-      std::this_thread::sleep_for(kAccuracy / 2);
+void
+CoarseClockInitializer::Start()
+{
+    if (!internal::TestAndSet(running_, false, true)) {
+        TILE_LOG_WARNING("CoarseClockInitializer is already running");
+        return;
     }
-  });
+
+    UpdateCoarseTimestamps();
+
+    worker_ = make_unique<std::thread>([this] {
+        const auto accuracy_as_ns = std::chrono::duration_cast<std::chrono::nanoseconds>(kAccuracy).count();
+        TILE_CHECK_GE(accuracy_as_ns, 2000, "accuracy is too small, MUST GE 2000ns, current is {}", kAccuracy);
+
+        while (running_.load(std::memory_order_relaxed)) {
+            // std::this_thread::sleep_for(std::chrono::nanoseconds(500));
+            UpdateCoarseTimestamps();
+            // Sleep(accuracy_as_ns / 2);
+            std::this_thread::sleep_for(kAccuracy / 2);
+        }
+    });
 }
 
-void CoarseClockInitializer::Stop() {
-  running_.store(false, std::memory_order_relaxed);
+void
+CoarseClockInitializer::Stop()
+{
+    running_.store(false, std::memory_order_relaxed);
 }
 
-void CoarseClockInitializer::Join() {
-  if (worker_) {
-    worker_->join();
-    worker_.reset();
-  }
+void
+CoarseClockInitializer::Join()
+{
+    if (worker_) {
+        worker_->join();
+        worker_.reset();
+    }
 }
 
 CoarseClockInitializer::CoarseClockInitializer() {}
 
 CoarseClockInitializer::~CoarseClockInitializer() {}
 
-} // namespace chrono
-} // namespace detail
+}// namespace chrono
+}// namespace detail
 
-std::chrono::steady_clock::time_point ReadSteadyClock() {
-  // return ReadClock<std::chrono::steady_clock>(CLOCK_MONOTONIC);
-  return std::chrono::steady_clock::now();
-}
-std::chrono::system_clock::time_point ReadSystemClock() {
-  // return ReadClock<std::chrono::system_clock>(CLOCK_REALTIME);
-  return std::chrono::system_clock::now();
+std::chrono::steady_clock::time_point
+ReadSteadyClock()
+{
+    // return ReadClock<std::chrono::steady_clock>(CLOCK_MONOTONIC);
+    return std::chrono::steady_clock::now();
 }
 
-std::chrono::steady_clock::time_point ReadCoarseSteadyClock() {
-  auto coarse_duration =
-      detail::chrono::async_updated_timestamps.steady_clock_time_since_epoch
-          .load(std::memory_order_relaxed);
-  auto target_duration =
-      std::chrono::duration_cast<std::chrono::steady_clock::duration>(
-          coarse_duration);
-  return std::chrono::steady_clock::time_point(target_duration);
+std::chrono::system_clock::time_point
+ReadSystemClock()
+{
+    // return ReadClock<std::chrono::system_clock>(CLOCK_REALTIME);
+    return std::chrono::system_clock::now();
 }
-std::chrono::system_clock::time_point ReadCoarseSystemClock() {
-  auto coarse_duration =
-      detail::chrono::async_updated_timestamps.system_clock_time_since_epoch
-          .load(std::memory_order_relaxed);
 
-  auto target_duration =
-      std::chrono::duration_cast<std::chrono::system_clock::duration>(
-          coarse_duration);
-
-  return std::chrono::system_clock::time_point(target_duration);
+std::chrono::steady_clock::time_point
+ReadCoarseSteadyClock()
+{
+    auto coarse_duration =
+        detail::chrono::async_updated_timestamps.steady_clock_time_since_epoch.load(std::memory_order_relaxed);
+    auto target_duration = std::chrono::duration_cast<std::chrono::steady_clock::duration>(coarse_duration);
+    return std::chrono::steady_clock::time_point(target_duration);
 }
-} // namespace tile
+
+std::chrono::system_clock::time_point
+ReadCoarseSystemClock()
+{
+    auto coarse_duration =
+        detail::chrono::async_updated_timestamps.system_clock_time_since_epoch.load(std::memory_order_relaxed);
+
+    auto target_duration = std::chrono::duration_cast<std::chrono::system_clock::duration>(coarse_duration);
+
+    return std::chrono::system_clock::time_point(target_duration);
+}
+}// namespace tile

tile/base/chrono.h

@@ -17,26 +17,26 @@ namespace chrono {
 
 class CoarseClockInitializer {
 public:
-  static constexpr auto kAccuracy = std::chrono::microseconds(500);
-  static CoarseClockInitializer *Instance();
+    static constexpr auto kAccuracy = std::chrono::microseconds(500);
+    static CoarseClockInitializer *Instance();
 
-  // for `tile::Start()`
-  void Start();
-  void Stop();
-  void Join();
+    // for `tile::Start()`
+    void Start();
+    void Stop();
+    void Join();
 
 private:
-  ~CoarseClockInitializer();
-  CoarseClockInitializer();
-  friend NeverDestroyedSingleton<CoarseClockInitializer>;
+    ~CoarseClockInitializer();
+    CoarseClockInitializer();
+    friend NeverDestroyedSingleton<CoarseClockInitializer>;
 
 private:
-  std::unique_ptr<std::thread> worker_;
-  std::atomic<bool> running_{false};
+    std::unique_ptr<std::thread> worker_;
+    std::atomic<bool> running_{false};
 };
 
-} // namespace chrono
-} // namespace detail
+}// namespace chrono
+}// namespace detail
 
 std::chrono::steady_clock::time_point ReadSteadyClock();
 std::chrono::system_clock::time_point ReadSystemClock();
@@ -45,10 +45,13 @@ std::chrono::system_clock::time_point ReadSystemClock();
 std::chrono::steady_clock::time_point ReadCoarseSteadyClock();
 // accuracy: 10us
 std::chrono::system_clock::time_point ReadCoarseSystemClock();
-inline std::int64_t ReadUnixTimestamp() {
-  return ReadCoarseSystemClock().time_since_epoch() / std::chrono::seconds(1);
+
+inline std::int64_t
+ReadUnixTimestamp()
+{
+    return ReadCoarseSystemClock().time_since_epoch() / std::chrono::seconds(1);
 }
 
-} // namespace tile
+}// namespace tile
 
-#endif // _TILE_BASE_CHRONO_H
+#endif// _TILE_BASE_CHRONO_H

tile/base/chrono_benchmark.cc

@@ -8,63 +8,67 @@
 
 namespace tile {
 
-void Benchmark_GetTimeOfDay(benchmark::State &state) {
-  while (state.KeepRunning()) {
-    struct timeval tv;
-    gettimeofday(&tv, nullptr);
-  }
+void
+Benchmark_GetTimeOfDay(benchmark::State &state)
+{
+    while (state.KeepRunning()) {
+        struct timeval tv;
+        gettimeofday(&tv, nullptr);
+    }
 }
 
 BENCHMARK(Benchmark_GetTimeOfDay);
 
-void Benchmark_StdSteadyClock(benchmark::State &state) {
-  while (state.KeepRunning()) {
-    (void)std::chrono::steady_clock::now();
-  }
+void
+Benchmark_StdSteadyClock(benchmark::State &state)
+{
+    while (state.KeepRunning()) { (void) std::chrono::steady_clock::now(); }
 }
 
 BENCHMARK(Benchmark_StdSteadyClock);
 
-void Benchmark_StdSystemClock(benchmark::State &state) {
-  while (state.KeepRunning()) {
-    (void)std::chrono::system_clock::now();
-  }
+void
+Benchmark_StdSystemClock(benchmark::State &state)
+{
+    while (state.KeepRunning()) { (void) std::chrono::system_clock::now(); }
 }
 
 BENCHMARK(Benchmark_StdSystemClock);
 
-void Benchmark_ReadSteadyClock(benchmark::State &state) {
-  while (state.KeepRunning()) {
-    ReadSteadyClock();
-  }
+void
+Benchmark_ReadSteadyClock(benchmark::State &state)
+{
+    while (state.KeepRunning()) { ReadSteadyClock(); }
 }
 
 BENCHMARK(Benchmark_ReadSteadyClock);
 
-void Benchmark_ReadSystemClock(benchmark::State &state) {
-  while (state.KeepRunning()) {
-    ReadSystemClock();
-  }
+void
+Benchmark_ReadSystemClock(benchmark::State &state)
+{
+    while (state.KeepRunning()) { ReadSystemClock(); }
 }
 
 BENCHMARK(Benchmark_ReadSystemClock);
 
-void Benchmark_ReadCoarseSteadyClock(benchmark::State &state) {
-  while (state.KeepRunning()) {
-    // ... <+23>: lea 0x137c5a(%rip),%rax  # `system_clock_time_since_epoch`
-    // ... <+30>: mov (%rax),%rax
-    ReadCoarseSteadyClock();
-  }
+void
+Benchmark_ReadCoarseSteadyClock(benchmark::State &state)
+{
+    while (state.KeepRunning()) {
+        // ... <+23>: lea 0x137c5a(%rip),%rax  # `system_clock_time_since_epoch`
+        // ... <+30>: mov (%rax),%rax
+        ReadCoarseSteadyClock();
+    }
 }
 
 BENCHMARK(Benchmark_ReadCoarseSteadyClock);
 
-void Benchmark_ReadCoarseSystemClock(benchmark::State &state) {
-  while (state.KeepRunning()) {
-    ReadCoarseSystemClock();
-  }
+void
+Benchmark_ReadCoarseSystemClock(benchmark::State &state)
+{
+    while (state.KeepRunning()) { ReadCoarseSystemClock(); }
 }
 
 BENCHMARK(Benchmark_ReadCoarseSystemClock);
 
-} // namespace tile
+}// namespace tile

tile/base/chrono_test.cc

@@ -7,42 +7,38 @@ namespace tile {
 static constexpr auto one_ms = std::chrono::milliseconds(1);
 static constexpr auto kTestN = 1000;
 
-long AvageTime(std::function<long()> f, std::size_t n = kTestN) {
-  long double total = 0;
-  for (std::size_t i = 0; i != n; ++i) {
-    total += 1.0f / n * f();
-    std::this_thread::sleep_for(std::chrono::milliseconds(1));
-  }
-  return static_cast<long>(total);
+long
+AvageTime(std::function<long()> f, std::size_t n = kTestN)
+{
+    long double total = 0;
+    for (std::size_t i = 0; i != n; ++i) {
+        total += 1.0f / n * f();
+        std::this_thread::sleep_for(std::chrono::milliseconds(1));
+    }
+    return static_cast<long>(total);
 }
 
-TEST(SystemClock, Compare) {
-  auto diff = AvageTime([] {
-    return (ReadSystemClock() - std::chrono::system_clock::now()) / one_ms;
-  });
-  ASSERT_NEAR(diff, 0, 5);
+TEST(SystemClock, Compare)
+{
+    auto diff = AvageTime([] { return (ReadSystemClock() - std::chrono::system_clock::now()) / one_ms; });
+    ASSERT_NEAR(diff, 0, 5);
 }
 
-TEST(SteadyClock, Compare) {
-  auto diff = AvageTime([] {
-    return (ReadSteadyClock() - std::chrono::steady_clock::now()) / one_ms;
-  });
-  ASSERT_NEAR(diff, 0, 5);
+TEST(SteadyClock, Compare)
+{
+    auto diff = AvageTime([] { return (ReadSteadyClock() - std::chrono::steady_clock::now()) / one_ms; });
+    ASSERT_NEAR(diff, 0, 5);
 }
 
-TEST(CoarseSystemClock, Compare) {
-  auto diff = AvageTime([] {
-    return (ReadCoarseSystemClock() - std::chrono::system_clock::now()) /
-           one_ms;
-  });
-  ASSERT_NEAR(diff, 0, kTestN);
+TEST(CoarseSystemClock, Compare)
+{
+    auto diff = AvageTime([] { return (ReadCoarseSystemClock() - std::chrono::system_clock::now()) / one_ms; });
+    ASSERT_NEAR(diff, 0, kTestN);
 }
 
-TEST(CoarseSteadyClock, Compare) {
-  auto diff = AvageTime([] {
-    return (ReadCoarseSteadyClock() - std::chrono::steady_clock::now()) /
-           one_ms;
-  });
-  ASSERT_NEAR(diff, 0, kTestN);
+TEST(CoarseSteadyClock, Compare)
+{
+    auto diff = AvageTime([] { return (ReadCoarseSteadyClock() - std::chrono::steady_clock::now()) / one_ms; });
+    ASSERT_NEAR(diff, 0, kTestN);
 }
-} // namespace tile
+}// namespace tile

tile/base/compression.cc

@@ -4,89 +4,96 @@
 
 namespace tile {
 
-std::unique_ptr<Decompressor> MakeDecompressor(Slice name) {
-  return decompressor_registry.TryNew(name);
+std::unique_ptr<Decompressor>
+MakeDecompressor(Slice name)
+{
+    return decompressor_registry.TryNew(name);
 }
 
-std::unique_ptr<Compressor> MakeCompressor(Slice name) {
-  return compressor_registry.TryNew(name);
+std::unique_ptr<Compressor>
+MakeCompressor(Slice name)
+{
+    return compressor_registry.TryNew(name);
 }
 
-std::optional<NoncontiguousBuffer> Compress(Compressor *compressor,
-                                            const NoncontiguousBuffer &body) {
-  NoncontiguousBufferBuilder builder;
-  if (!Compress(compressor, body, &builder)) {
-    return std::nullopt;
-  }
-  return builder.DestructiveGet();
-}
-std::optional<NoncontiguousBuffer> Compress(Compressor *compressor,
-                                            Slice body) {
-  NoncontiguousBufferBuilder builder;
-  if (!Compress(compressor, body, &builder)) {
-    return std::nullopt;
-  }
-  return builder.DestructiveGet();
+std::optional<NoncontiguousBuffer>
+Compress(Compressor *compressor, const NoncontiguousBuffer &body)
+{
+    NoncontiguousBufferBuilder builder;
+    if (!Compress(compressor, body, &builder)) { return std::nullopt; }
+    return builder.DestructiveGet();
 }
 
-bool Compress(Compressor *compressor, const NoncontiguousBuffer &nb,
-              NoncontiguousBufferBuilder *builder) {
-  if (!compressor) {
-    TILE_LOG_WARNING_EVERY_SECOND("Compressor nullptr");
-    return false;
-  }
-
-  NoncontiguousBufferCompressionOutputStream out(builder);
-  return compressor->Compress(nb, &out);
+std::optional<NoncontiguousBuffer>
+Compress(Compressor *compressor, Slice body)
+{
+    NoncontiguousBufferBuilder builder;
+    if (!Compress(compressor, body, &builder)) { return std::nullopt; }
+    return builder.DestructiveGet();
 }
 
-bool Compress(Compressor *compressor, Slice body,
-              NoncontiguousBufferBuilder *builder) {
-  if (!compressor) {
-    TILE_LOG_WARNING_EVERY_SECOND("Compressor nullptr");
-    return false;
-  }
+bool
+Compress(Compressor *compressor, const NoncontiguousBuffer &nb, NoncontiguousBufferBuilder *builder)
+{
+    if (!compressor) {
+        TILE_LOG_WARNING_EVERY_SECOND("Compressor nullptr");
+        return false;
+    }
 
-  NoncontiguousBufferCompressionOutputStream out(builder);
-  return compressor->Compress(body.data(), body.size(), &out);
+    NoncontiguousBufferCompressionOutputStream out(builder);
+    return compressor->Compress(nb, &out);
 }
 
-std::optional<NoncontiguousBuffer> Decompress(Decompressor *decompressor,
-                                              const NoncontiguousBuffer &body) {
-  NoncontiguousBufferBuilder builder;
-  if (!Decompress(decompressor, body, &builder)) {
-    return std::nullopt;
-  }
-  return builder.DestructiveGet();
-}
-std::optional<NoncontiguousBuffer> Decompress(Decompressor *decompressor,
-                                              Slice body) {
-  NoncontiguousBufferBuilder builder;
-  if (!Decompress(decompressor, body, &builder)) {
-    return std::nullopt;
-  }
-  return builder.DestructiveGet();
+bool
+Compress(Compressor *compressor, Slice body, NoncontiguousBufferBuilder *builder)
+{
+    if (!compressor) {
+        TILE_LOG_WARNING_EVERY_SECOND("Compressor nullptr");
+        return false;
+    }
+
+    NoncontiguousBufferCompressionOutputStream out(builder);
+    return compressor->Compress(body.data(), body.size(), &out);
 }
 
-bool Decompress(Decompressor *decompressor, const NoncontiguousBuffer &nb,
-                NoncontiguousBufferBuilder *builder) {
-  if (!decompressor) {
-    TILE_LOG_WARNING_EVERY_SECOND("Decompressor nullptr");
-    return false;
-  }
-
-  NoncontiguousBufferCompressionOutputStream out(builder);
-  return decompressor->Decompress(nb, &out);
-}
-bool Decompress(Decompressor *decompressor, Slice body,
-                NoncontiguousBufferBuilder *builder) {
-  if (!decompressor) {
-    TILE_LOG_WARNING_EVERY_SECOND("Decompressor nullptr");
-    return false;
-  }
-
-  NoncontiguousBufferCompressionOutputStream out(builder);
-  return decompressor->Decompress(body.data(), body.size(), &out);
+std::optional<NoncontiguousBuffer>
+Decompress(Decompressor *decompressor, const NoncontiguousBuffer &body)
+{
+    NoncontiguousBufferBuilder builder;
+    if (!Decompress(decompressor, body, &builder)) { return std::nullopt; }
+    return builder.DestructiveGet();
 }
 
-} // namespace tile
+std::optional<NoncontiguousBuffer>
+Decompress(Decompressor *decompressor, Slice body)
+{
+    NoncontiguousBufferBuilder builder;
+    if (!Decompress(decompressor, body, &builder)) { return std::nullopt; }
+    return builder.DestructiveGet();
+}
+
+bool
+Decompress(Decompressor *decompressor, const NoncontiguousBuffer &nb, NoncontiguousBufferBuilder *builder)
+{
+    if (!decompressor) {
+        TILE_LOG_WARNING_EVERY_SECOND("Decompressor nullptr");
+        return false;
+    }
+
+    NoncontiguousBufferCompressionOutputStream out(builder);
+    return decompressor->Decompress(nb, &out);
+}
+
+bool
+Decompress(Decompressor *decompressor, Slice body, NoncontiguousBufferBuilder *builder)
+{
+    if (!decompressor) {
+        TILE_LOG_WARNING_EVERY_SECOND("Decompressor nullptr");
+        return false;
+    }
+
+    NoncontiguousBufferCompressionOutputStream out(builder);
+    return decompressor->Decompress(body.data(), body.size(), &out);
+}
+
+}// namespace tile

tile/base/compression.h

@@ -11,26 +11,19 @@ namespace tile {
 std::unique_ptr<Decompressor> MakeDecompressor(Slice name);
 std::unique_ptr<Compressor> MakeCompressor(Slice name);
 
-std::optional<NoncontiguousBuffer> Compress(Compressor *compressor,
-                                            const NoncontiguousBuffer &nb);
+std::optional<NoncontiguousBuffer> Compress(Compressor *compressor, const NoncontiguousBuffer &nb);
 std::optional<NoncontiguousBuffer> Compress(Compressor *compressor, Slice body);
 
-bool Compress(Compressor *compressor, const NoncontiguousBuffer &nb,
-              NoncontiguousBufferBuilder *builder);
+bool Compress(Compressor *compressor, const NoncontiguousBuffer &nb, NoncontiguousBufferBuilder *builder);
 
-bool Compress(Compressor *compressor, Slice body,
-              NoncontiguousBufferBuilder *builder);
+bool Compress(Compressor *compressor, Slice body, NoncontiguousBufferBuilder *builder);
 
-std::optional<NoncontiguousBuffer> Decompress(Decompressor *decompressor,
-                                              const NoncontiguousBuffer &body);
-std::optional<NoncontiguousBuffer> Decompress(Decompressor *decompressor,
-                                              Slice body);
+std::optional<NoncontiguousBuffer> Decompress(Decompressor *decompressor, const NoncontiguousBuffer &body);
+std::optional<NoncontiguousBuffer> Decompress(Decompressor *decompressor, Slice body);
 
-bool Decompress(Decompressor *decompressor, const NoncontiguousBuffer &nb,
-                NoncontiguousBufferBuilder *builder);
-bool Decompress(Decompressor *decompressor, Slice body,
-                NoncontiguousBufferBuilder *builder);
+bool Decompress(Decompressor *decompressor, const NoncontiguousBuffer &nb, NoncontiguousBufferBuilder *builder);
+bool Decompress(Decompressor *decompressor, Slice body, NoncontiguousBufferBuilder *builder);
 
-} // namespace tile
+}// namespace tile
 
-#endif // TILE_BASE_COMPRESSION_H
+#endif// TILE_BASE_COMPRESSION_H

tile/base/compression/compression.cc

@@ -4,25 +4,33 @@ namespace tile {
 TILE_DEFINE_CLASS_DEPENDENCY_REGISTRY(compressor_registry, Compressor);
 TILE_DEFINE_CLASS_DEPENDENCY_REGISTRY(decompressor_registry, Decompressor);
 
-TestCompressionOutputStream::TestCompressionOutputStream(std::string *s,
-                                                         std::size_t every_size)
-    : buffer_(s), every_size_(every_size) {}
+TestCompressionOutputStream::TestCompressionOutputStream(std::string *s, std::size_t every_size)
+    : buffer_(s),
+      every_size_(every_size)
+{}
 
-bool TestCompressionOutputStream::Next(void **data,
-                                       std::size_t *size) noexcept {
-  if (buffer_->size() < using_bytes_ + every_size_) {
-    buffer_->resize(using_bytes_ + every_size_);
-  }
+bool
+TestCompressionOutputStream::Next(void **data, std::size_t *size) noexcept
+{
+    if (buffer_->size() < using_bytes_ + every_size_) { buffer_->resize(using_bytes_ + every_size_); }
 
-  *data = internal::RemoveConstPtr(buffer_->data()) + using_bytes_;
-  *size = every_size_;
+    *data = internal::RemoveConstPtr(buffer_->data()) + using_bytes_;
+    *size = every_size_;
 
-  using_bytes_ += every_size_;
-  return true;
+    using_bytes_ += every_size_;
+    return true;
 }
-void TestCompressionOutputStream::BackUp(std::size_t count) noexcept {
-  using_bytes_ -= count;
-}
-void TestCompressionOutputStream::Flush() { buffer_->resize(using_bytes_); }
 
-} // namespace tile
+void
+TestCompressionOutputStream::BackUp(std::size_t count) noexcept
+{
+    using_bytes_ -= count;
+}
+
+void
+TestCompressionOutputStream::Flush()
+{
+    buffer_->resize(using_bytes_);
+}
+
+}// namespace tile

tile/base/compression/compression.h

@@ -9,57 +9,50 @@
 namespace tile {
 class CompressionOutputStream {
 public:
-  virtual ~CompressionOutputStream() = default;
-  // Get a buffer to write to. The buffer may be backed by multiple
-  virtual bool Next(void **data, std::size_t *size) noexcept = 0;
-  virtual void BackUp(std::size_t count) noexcept = 0;
+    virtual ~CompressionOutputStream() = default;
+    // Get a buffer to write to. The buffer may be backed by multiple
+    virtual bool Next(void **data, std::size_t *size) noexcept = 0;
+    virtual void BackUp(std::size_t count) noexcept            = 0;
 };
 
 class Compressor {
 public:
-  virtual ~Compressor() = default;
-  virtual bool Compress(const void *src, std::size_t size,
-                        CompressionOutputStream *out) = 0;
-  virtual bool Compress(const NoncontiguousBuffer &src,
-                        CompressionOutputStream *out) = 0;
+    virtual ~Compressor()                                                                  = default;
+    virtual bool Compress(const void *src, std::size_t size, CompressionOutputStream *out) = 0;
+    virtual bool Compress(const NoncontiguousBuffer &src, CompressionOutputStream *out)    = 0;
 };
 
 class Decompressor {
 public:
-  ~Decompressor() = default;
-  virtual bool Decompress(const void *src, std::size_t size,
-                          CompressionOutputStream *out) = 0;
-  virtual bool Decompress(const NoncontiguousBuffer &src,
-                          CompressionOutputStream *out) = 0;
+    ~Decompressor()                                                                          = default;
+    virtual bool Decompress(const void *src, std::size_t size, CompressionOutputStream *out) = 0;
+    virtual bool Decompress(const NoncontiguousBuffer &src, CompressionOutputStream *out)    = 0;
 };
 
 TILE_DECLARE_CLASS_DEPENDENCY_REGISTRY(compressor_registry, Compressor);
 TILE_DECLARE_CLASS_DEPENDENCY_REGISTRY(decompressor_registry, Decompressor);
 
-} // namespace tile
+}// namespace tile
 
-#define TILE_COMPRESSION_REGISTER_COMPRESSOR(Name, Implementation)             \
-  TILE_REGISTER_CLASS_DEPENDENCY(::tile::compressor_registry, Name,            \
-                                 Implementation)
-#define TILE_COMPRESSION_REGISTER_DECOMPRESSOR(Name, Implementation)           \
-  TILE_REGISTER_CLASS_DEPENDENCY(::tile::decompressor_registry, Name,          \
-                                 Implementation)
+#define TILE_COMPRESSION_REGISTER_COMPRESSOR(Name, Implementation)                                                     \
+    TILE_REGISTER_CLASS_DEPENDENCY(::tile::compressor_registry, Name, Implementation)
+#define TILE_COMPRESSION_REGISTER_DECOMPRESSOR(Name, Implementation)                                                   \
+    TILE_REGISTER_CLASS_DEPENDENCY(::tile::decompressor_registry, Name, Implementation)
 
 namespace tile {
 class TestCompressionOutputStream : public CompressionOutputStream {
 public:
-  explicit TestCompressionOutputStream(std::string *s,
-                                       std::size_t every_size = 2);
+    explicit TestCompressionOutputStream(std::string *s, std::size_t every_size = 2);
 
-  bool Next(void **data, std::size_t *size) noexcept override;
-  void BackUp(std::size_t count) noexcept override;
-  void Flush();
+    bool Next(void **data, std::size_t *size) noexcept override;
+    void BackUp(std::size_t count) noexcept override;
+    void Flush();
 
 private:
-  std::size_t using_bytes_{};
-  std::size_t every_size_;
-  std::string *buffer_;
+    std::size_t using_bytes_{};
+    std::size_t every_size_;
+    std::string *buffer_;
 };
-} // namespace tile
+}// namespace tile
 
-#endif // TILE_BASE_COMPRESSION_COMPRESSION_H
+#endif// TILE_BASE_COMPRESSION_COMPRESSION_H

tile/base/compression/gzip.cc

@@ -11,24 +11,28 @@ TILE_COMPRESSION_REGISTER_DECOMPRESSOR("gzip", GzipDecompressor);
 
 namespace detail {
 struct ZStream {
-  z_stream stream;
+    z_stream stream;
 };
-} // namespace detail
+}// namespace detail
+
 namespace {
 
-inline double EstimateCompressionRate(const z_stream *stream,
-                                      double default_value) {
-  if (stream->total_in > 0) {
-    double rate = 1.0f * stream->total_out / stream->total_in;
-    constexpr double kMinRate = 1.1;
-    return rate * kMinRate;
-  }
+inline double
+EstimateCompressionRate(const z_stream *stream, double default_value)
+{
+    if (stream->total_in > 0) {
+        double rate               = 1.0f * stream->total_out / stream->total_in;
+        constexpr double kMinRate = 1.1;
+        return rate * kMinRate;
+    }
 
-  return default_value;
+    return default_value;
 }
 
-inline uint32_t RestrictAvailSize(size_t size) {
-  return static_cast<uint32_t>(std::min(size, static_cast<size_t>(UINT32_MAX)));
+inline uint32_t
+RestrictAvailSize(size_t size)
+{
+    return static_cast<uint32_t>(std::min(size, static_cast<size_t>(UINT32_MAX)));
 }
 
 // See document of inflateInit2 in zlib.h
@@ -37,207 +41,223 @@ constexpr int ZLIB_INIT_FLAG_GZIP = 16;
 // he size to increase every time Z_BUF_ERROR returns.
 constexpr int kOutBufferIncreaseSize = 32;
 
-bool DoAppend(z_stream *stream, CompressionOutputStream *out_stream,
-              const void *input_buffer, std::size_t input_size, bool is_deflate,
-              bool finish) {
-  TILE_CHECK(stream && out_stream);
+bool
+DoAppend(z_stream *stream,
+         CompressionOutputStream *out_stream,
+         const void *input_buffer,
+         std::size_t input_size,
+         bool is_deflate,
+         bool finish)
+{
+    TILE_CHECK(stream && out_stream);
 
-  if (!finish && (input_buffer == nullptr || input_size == 0)) {
-    // no input data
-    return true;
-  }
+    if (!finish && (input_buffer == nullptr || input_size == 0)) {
+        // no input data
+        return true;
+    }
 
-  stream->next_in = reinterpret_cast<Bytef *>(const_cast<void *>(input_buffer));
-  int code = Z_OK;
-  // the number of  `buffer too small error`
-  int need_more_space_cnt = 0;
-  std::string tmp_buffer;
-  size_t left_size = input_size;
-  while (left_size > 0 || need_more_space_cnt > 0 || finish) {
-    stream->avail_in = RestrictAvailSize(left_size);
-    const auto current_avail_in = stream->avail_in;
-    std::size_t out_size;
-    if (!need_more_space_cnt) {
-      void *out_data;
-      if (!out_stream->Next(&out_data, &out_size)) {
-        // out buffer is full
-        return false;
-      }
+    stream->next_in = reinterpret_cast<Bytef *>(const_cast<void *>(input_buffer));
+    int code        = Z_OK;
+    // the number of  `buffer too small error`
+    int need_more_space_cnt = 0;
+    std::string tmp_buffer;
+    size_t left_size = input_size;
+    while (left_size > 0 || need_more_space_cnt > 0 || finish) {
+        stream->avail_in            = RestrictAvailSize(left_size);
+        const auto current_avail_in = stream->avail_in;
+        std::size_t out_size;
+        if (!need_more_space_cnt) {
+            void *out_data;
+            if (!out_stream->Next(&out_data, &out_size)) {
+                // out buffer is full
+                return false;
+            }
 
-      stream->next_out = reinterpret_cast<Bytef *>(out_data);
+            stream->next_out = reinterpret_cast<Bytef *>(out_data);
+        } else {
+            double rate = EstimateCompressionRate(stream, 0.5);
+            tmp_buffer.resize(left_size * rate + need_more_space_cnt * kOutBufferIncreaseSize);
+            stream->next_out = reinterpret_cast<Bytef *>(internal::RemoveConstPtr(tmp_buffer.data()));
+            out_size         = tmp_buffer.size();
+        }
+
+        stream->avail_out                   = RestrictAvailSize(out_size);
+        const std::size_t current_avail_out = stream->avail_out;
+
+        TILE_CHECK_GT(stream->avail_out, 0, "Avail_out should never be zero before the call.");
+        int flush_option = finish ? Z_FINISH : Z_NO_FLUSH;
+        if (is_deflate) {
+            code = deflate(stream, flush_option);
+        } else {
+            code = inflate(stream, flush_option);
+        }
+
+        // https://refspecs.linuxbase.org/LSB_3.0.0/LSB-Core-generic/LSB-Core-generic/zlib-inflate-1.html
+        // No progress is possible; either avail_in or avail_out was zero.
+        if (code == Z_BUF_ERROR) {
+            if (need_more_space_cnt == 0) { out_stream->BackUp(out_size); }
+
+            if (stream->avail_in == 0) {
+                // if not finish, we need more input data
+                // otherwise, fail to compress/decompress
+                return !finish;
+            }
+
+            ++need_more_space_cnt;
+            continue;
+        }
+
+        if (code < 0) {
+            TILE_LOG_ERROR_EVERY_SECOND("gzip compress error code [{}]", code);
+            break;
+        }
+
+        // consume input data (current_avail_in - stream->avail_in)
+        // produce output data (stream->avail_out)
+        left_size -= current_avail_in - stream->avail_in;
+        if (need_more_space_cnt == 0) {
+            out_stream->BackUp(stream->avail_out);
+        } else {
+            if (TILE_UNLIKELY(!CopyDataToCompressionOutputStream(
+                    out_stream, tmp_buffer.data(), current_avail_out - stream->avail_out))) {
+                return false;
+            }
+            need_more_space_cnt = 0;
+        }
+
+        if (code == Z_STREAM_END) { return true; }
+    }
+
+    return code == Z_OK;
+}
+}// namespace
+
+bool
+GzipCompressor::Compress(const void *src, std::size_t size, CompressionOutputStream *out)
+{
+    bool ok = Init(out);
+    ok &= Append(src, size);
+    ok &= Flush();
+    out_ = nullptr;
+    return ok;
+}
+
+bool
+GzipCompressor::Compress(const NoncontiguousBuffer &bytes, CompressionOutputStream *out)
+{
+    bool ok          = Init(out);
+    std::size_t left = bytes.ByteSize();
+    for (auto iter = bytes.begin(); ok && iter != bytes.end(); ++iter) {
+        auto len = std::min(left, iter->size());
+        ok &= Append(iter->data(), len);
+        left -= len;
+    }
+    ok &= Flush();
+    out_ = nullptr;
+    return ok;
+}
+
+bool
+GzipCompressor::Append(const void *buffer, std::size_t size)
+{
+    return DoAppend(&stream_->stream, out_, buffer, size, true, false);
+}
+
+bool
+GzipCompressor::Flush()
+{
+    TILE_CHECK(out_);
+    if (!DoAppend(&stream_->stream, out_, nullptr, 0, true, true)) { return false; }
+    return Release();
+}
+
+bool
+GzipCompressor::Init(CompressionOutputStream *out)
+{
+    TILE_CHECK(!out_);
+    stream_  = make_unique<detail::ZStream>();
+    int code = deflateInit2(
+        &stream_->stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, MAX_WBITS + ZLIB_INIT_FLAG_GZIP, 8, Z_DEFAULT_STRATEGY);
+    if (code != Z_OK) {
+        TILE_LOG_ERROR_EVERY_SECOND("deflateInit2 error code [{}]", code);
+        stream_ = nullptr;
     } else {
-      double rate = EstimateCompressionRate(stream, 0.5);
-      tmp_buffer.resize(left_size * rate +
-                        need_more_space_cnt * kOutBufferIncreaseSize);
-      stream->next_out = reinterpret_cast<Bytef *>(
-          internal::RemoveConstPtr(tmp_buffer.data()));
-      out_size = tmp_buffer.size();
+        out_ = out;
     }
+    return code == Z_OK;
+}
 
-    stream->avail_out = RestrictAvailSize(out_size);
-    const std::size_t current_avail_out = stream->avail_out;
+bool
+GzipCompressor::Release()
+{
+    TILE_CHECK(stream_);
+    int code = deflateEnd(&stream_->stream);
+    if (code != Z_OK) { TILE_LOG_WARNING_EVERY_SECOND("DeflateEnd fail with code [{}].", code); }
+    return code == Z_OK;
+}
 
-    TILE_CHECK_GT(stream->avail_out, 0,
-                  "Avail_out should never be zero before the call.");
-    int flush_option = finish ? Z_FINISH : Z_NO_FLUSH;
-    if (is_deflate) {
-      code = deflate(stream, flush_option);
+bool
+GzipDecompressor::Decompress(const void *src, std::size_t size, CompressionOutputStream *out)
+{
+    bool ok = Init(out);
+    ok &= Append(src, size);
+    ok &= Flush();
+    out_ = nullptr;
+    return ok;
+}
+
+bool
+GzipDecompressor::Decompress(const NoncontiguousBuffer &compressed, CompressionOutputStream *out)
+{
+    bool ok          = Init(out);
+    std::size_t left = compressed.ByteSize();
+    for (auto iter = compressed.begin(); ok && iter != compressed.end(); ++iter) {
+        auto len = std::min(left, iter->size());
+        ok &= Append(iter->data(), len);
+        left -= len;
+    }
+    ok &= Flush();
+    out_ = nullptr;
+    return ok;
+}
+
+bool
+GzipDecompressor::Append(const void *buffer, std::size_t size)
+{
+    return DoAppend(&stream_->stream, out_, buffer, size, false, false);
+}
+
+bool
+GzipDecompressor::Flush()
+{
+    TILE_CHECK(out_);
+    if (!DoAppend(&stream_->stream, out_, nullptr, 0, false, true)) { return false; }
+    return Release();
+}
+
+bool
+GzipDecompressor::Init(CompressionOutputStream *out)
+{
+    TILE_CHECK(!out_);
+    stream_  = make_unique<detail::ZStream>();
+    int code = inflateInit2(&stream_->stream, MAX_WBITS + ZLIB_INIT_FLAG_GZIP);
+    if (code != Z_OK) {
+        TILE_LOG_ERROR_EVERY_SECOND("inflateInit2 error code [{}]", code);
+        stream_ = nullptr;
     } else {
-      code = inflate(stream, flush_option);
+        out_ = out;
     }
-
-    // https://refspecs.linuxbase.org/LSB_3.0.0/LSB-Core-generic/LSB-Core-generic/zlib-inflate-1.html
-    // No progress is possible; either avail_in or avail_out was zero.
-    if (code == Z_BUF_ERROR) {
-      if (need_more_space_cnt == 0) {
-        out_stream->BackUp(out_size);
-      }
-
-      if (stream->avail_in == 0) {
-        // if not finish, we need more input data
-        // otherwise, fail to compress/decompress
-        return !finish;
-      }
-
-      ++need_more_space_cnt;
-      continue;
-    }
-
-    if (code < 0) {
-      TILE_LOG_ERROR_EVERY_SECOND("gzip compress error code [{}]", code);
-      break;
-    }
-
-    // consume input data (current_avail_in - stream->avail_in)
-    // produce output data (stream->avail_out)
-    left_size -= current_avail_in - stream->avail_in;
-    if (need_more_space_cnt == 0) {
-      out_stream->BackUp(stream->avail_out);
-    } else {
-      if (TILE_UNLIKELY(!CopyDataToCompressionOutputStream(
-              out_stream, tmp_buffer.data(),
-              current_avail_out - stream->avail_out))) {
-        return false;
-      }
-      need_more_space_cnt = 0;
-    }
-
-    if (code == Z_STREAM_END) {
-      return true;
-    }
-  }
-
-  return code == Z_OK;
-}
-} // namespace
-
-bool GzipCompressor::Compress(const void *src, std::size_t size,
-                              CompressionOutputStream *out) {
-  bool ok = Init(out);
-  ok &= Append(src, size);
-  ok &= Flush();
-  out_ = nullptr;
-  return ok;
-}
-bool GzipCompressor::Compress(const NoncontiguousBuffer &bytes,
-                              CompressionOutputStream *out) {
-  bool ok = Init(out);
-  std::size_t left = bytes.ByteSize();
-  for (auto iter = bytes.begin(); ok && iter != bytes.end(); ++iter) {
-    auto len = std::min(left, iter->size());
-    ok &= Append(iter->data(), len);
-    left -= len;
-  }
-  ok &= Flush();
-  out_ = nullptr;
-  return ok;
-}
-bool GzipCompressor::Append(const void *buffer, std::size_t size) {
-  return DoAppend(&stream_->stream, out_, buffer, size, true, false);
-}
-bool GzipCompressor::Flush() {
-  TILE_CHECK(out_);
-  if (!DoAppend(&stream_->stream, out_, nullptr, 0, true, true)) {
-    return false;
-  }
-  return Release();
+    return code == Z_OK;
 }
 
-bool GzipCompressor::Init(CompressionOutputStream *out) {
-  TILE_CHECK(!out_);
-  stream_ = make_unique<detail::ZStream>();
-  int code =
-      deflateInit2(&stream_->stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED,
-                   MAX_WBITS + ZLIB_INIT_FLAG_GZIP, 8, Z_DEFAULT_STRATEGY);
-  if (code != Z_OK) {
-    TILE_LOG_ERROR_EVERY_SECOND("deflateInit2 error code [{}]", code);
-    stream_ = nullptr;
-  } else {
-    out_ = out;
-  }
-  return code == Z_OK;
-}
-bool GzipCompressor::Release() {
-  TILE_CHECK(stream_);
-  int code = deflateEnd(&stream_->stream);
-  if (code != Z_OK) {
-    TILE_LOG_WARNING_EVERY_SECOND("DeflateEnd fail with code [{}].", code);
-  }
-  return code == Z_OK;
+bool
+GzipDecompressor::Release()
+{
+    TILE_CHECK(stream_);
+    int code = inflateEnd(&stream_->stream);
+    if (code != Z_OK) { TILE_LOG_WARNING_EVERY_SECOND("DeflateEnd fail with code [{}].", code); }
+    return code == Z_OK;
 }
 
-bool GzipDecompressor::Decompress(const void *src, std::size_t size,
-                                  CompressionOutputStream *out) {
-  bool ok = Init(out);
-  ok &= Append(src, size);
-  ok &= Flush();
-  out_ = nullptr;
-  return ok;
-}
-bool GzipDecompressor::Decompress(const NoncontiguousBuffer &compressed,
-                                  CompressionOutputStream *out) {
-  bool ok = Init(out);
-  std::size_t left = compressed.ByteSize();
-  for (auto iter = compressed.begin(); ok && iter != compressed.end(); ++iter) {
-    auto len = std::min(left, iter->size());
-    ok &= Append(iter->data(), len);
-    left -= len;
-  }
-  ok &= Flush();
-  out_ = nullptr;
-  return ok;
-}
-
-bool GzipDecompressor::Append(const void *buffer, std::size_t size) {
-  return DoAppend(&stream_->stream, out_, buffer, size, false, false);
-}
-bool GzipDecompressor::Flush() {
-  TILE_CHECK(out_);
-  if (!DoAppend(&stream_->stream, out_, nullptr, 0, false, true)) {
-    return false;
-  }
-  return Release();
-}
-bool GzipDecompressor::Init(CompressionOutputStream *out) {
-  TILE_CHECK(!out_);
-  stream_ = make_unique<detail::ZStream>();
-  int code = inflateInit2(&stream_->stream, MAX_WBITS + ZLIB_INIT_FLAG_GZIP);
-  if (code != Z_OK) {
-    TILE_LOG_ERROR_EVERY_SECOND("inflateInit2 error code [{}]", code);
-    stream_ = nullptr;
-  } else {
-    out_ = out;
-  }
-  return code == Z_OK;
-}
-bool GzipDecompressor::Release() {
-  TILE_CHECK(stream_);
-  int code = inflateEnd(&stream_->stream);
-  if (code != Z_OK) {
-    TILE_LOG_WARNING_EVERY_SECOND("DeflateEnd fail with code [{}].", code);
-  }
-  return code == Z_OK;
-}
-
-} // namespace compression
-} // namespace tile
+}// namespace compression
+}// namespace tile

tile/base/compression/gzip.h

@@ -5,48 +5,43 @@
 
 #include <memory>
 
-
 #include "tile/base/compression/compression.h"
 
 namespace tile {
 namespace compression {
 namespace detail {
 struct ZStream;
-} // namespace detail
+}// namespace detail
 
 class GzipCompressor : public Compressor {
 public:
-  bool Compress(const void *src, std::size_t size,
-                CompressionOutputStream *out) override;
-  bool Compress(const NoncontiguousBuffer &bytes,
-                CompressionOutputStream *out) override;
+    bool Compress(const void *src, std::size_t size, CompressionOutputStream *out) override;
+    bool Compress(const NoncontiguousBuffer &bytes, CompressionOutputStream *out) override;
 
 private:
-  bool Append(const void *buffer, std::size_t size);
-  bool Flush();
-  bool Init(CompressionOutputStream *out);
-  bool Release();
-  std::unique_ptr<detail::ZStream> stream_;
-  CompressionOutputStream *out_ = nullptr;
+    bool Append(const void *buffer, std::size_t size);
+    bool Flush();
+    bool Init(CompressionOutputStream *out);
+    bool Release();
+    std::unique_ptr<detail::ZStream> stream_;
+    CompressionOutputStream *out_ = nullptr;
 };
 
 class GzipDecompressor : public Decompressor {
 public:
-  bool Decompress(const void *src, std::size_t size,
-                  CompressionOutputStream *out) override;
-  bool Decompress(const NoncontiguousBuffer &compressed,
-                  CompressionOutputStream *out) override;
+    bool Decompress(const void *src, std::size_t size, CompressionOutputStream *out) override;
+    bool Decompress(const NoncontiguousBuffer &compressed, CompressionOutputStream *out) override;
 
 private:
-  bool Append(const void *buffer, std::size_t size);
-  bool Flush();
-  bool Init(CompressionOutputStream *out);
-  bool Release();
-  std::unique_ptr<detail::ZStream> stream_;
-  CompressionOutputStream *out_ = nullptr;
+    bool Append(const void *buffer, std::size_t size);
+    bool Flush();
+    bool Init(CompressionOutputStream *out);
+    bool Release();
+    std::unique_ptr<detail::ZStream> stream_;
+    CompressionOutputStream *out_ = nullptr;
 };
 
-} // namespace compression
-} // namespace tile
+}// namespace compression
+}// namespace tile
 
-#endif // TILE_BASE_COMPRESSION_GZIP_H
+#endif// TILE_BASE_COMPRESSION_GZIP_H

tile/base/compression/util.cc

@@ -1,37 +1,33 @@
 #include "util.h"
+
 namespace tile {
 namespace compression {
-bool CopyDataToCompressionOutputStream(CompressionOutputStream *out,
-                                       const void *data, std::size_t size) {
+bool
+CopyDataToCompressionOutputStream(CompressionOutputStream *out, const void *data, std::size_t size)
+{
 
-  if (size == 0) {
-    return true;
-  }
+    if (size == 0) { return true; }
 
-  std::size_t current_pos = 0;
-  std::size_t left_to_copy = size;
+    std::size_t current_pos  = 0;
+    std::size_t left_to_copy = size;
 
-  while (true) {
-    void *next_data;
-    std::size_t next_size;
-    if (TILE_UNLIKELY(!out->Next(&next_data, &next_size))) {
-      return false;
+    while (true) {
+        void *next_data;
+        std::size_t next_size;
+        if (TILE_UNLIKELY(!out->Next(&next_data, &next_size))) { return false; }
+
+        if (left_to_copy <= next_size) {
+            memcpy(next_data, reinterpret_cast<const char *>(data) + current_pos, left_to_copy);
+            out->BackUp(next_size - left_to_copy);
+            return true;
+        } else {
+            memcpy(next_data, reinterpret_cast<const char *>(data) + current_pos, next_size);
+            current_pos += next_size;
+            left_to_copy -= next_size;
+        }
     }
-
-    if (left_to_copy <= next_size) {
-      memcpy(next_data, reinterpret_cast<const char *>(data) + current_pos,
-             left_to_copy);
-      out->BackUp(next_size - left_to_copy);
-      return true;
-    } else {
-      memcpy(next_data, reinterpret_cast<const char *>(data) + current_pos,
-             next_size);
-      current_pos += next_size;
-      left_to_copy -= next_size;
-    }
-  }
-  TILE_UNREACHABLE("");
-  return false;
+    TILE_UNREACHABLE("");
+    return false;
 }
-} // namespace compression
-} // namespace tile
+}// namespace compression
+}// namespace tile

tile/base/compression/util.h

@@ -7,9 +7,8 @@
 
 namespace tile {
 namespace compression {
-bool CopyDataToCompressionOutputStream(CompressionOutputStream *out,
-                                       const void *data, std::size_t size);
+bool CopyDataToCompressionOutputStream(CompressionOutputStream *out, const void *data, std::size_t size);
 }
-} // namespace tile
+}// namespace tile
 
-#endif // TILE_BASE_COMPRESSION_UTIL_H
+#endif// TILE_BASE_COMPRESSION_UTIL_H

tile/base/compression/util_test.cc

@@ -4,19 +4,20 @@
 
 namespace tile {
 namespace compression {
-TEST(CopyDataToCompressionOutputStream, All) {
-  std::string s;
-  std::string a = "123456789+";
+TEST(CopyDataToCompressionOutputStream, All)
+{
+    std::string s;
+    std::string a = "123456789+";
 
-  TestCompressionOutputStream out1(&s, 2);
-  CopyDataToCompressionOutputStream(&out1, a.data(), 1);
-  CopyDataToCompressionOutputStream(&out1, a.data() + 1, 2);
-  CopyDataToCompressionOutputStream(&out1, a.data() + 3, 3);
-  CopyDataToCompressionOutputStream(&out1, a.data() + 6, 4);
-  out1.Flush();
+    TestCompressionOutputStream out1(&s, 2);
+    CopyDataToCompressionOutputStream(&out1, a.data(), 1);
+    CopyDataToCompressionOutputStream(&out1, a.data() + 1, 2);
+    CopyDataToCompressionOutputStream(&out1, a.data() + 3, 3);
+    CopyDataToCompressionOutputStream(&out1, a.data() + 6, 4);
+    out1.Flush();
 
-  ASSERT_EQ(s, a);
+    ASSERT_EQ(s, a);
 }
-} // namespace compression
+}// namespace compression
 
-} // namespace tile
+}// namespace tile

tile/base/compression_test.cc

@@ -11,62 +11,67 @@ static const char *algos[] = {
     "gzip",
 };
 }
-TEST(MakeCompressor, All) {
-  auto &&c = MakeCompressor("gzip");
-  EXPECT_TRUE(c);
-  c = MakeCompressor("??");
-  EXPECT_FALSE(c);
+
+TEST(MakeCompressor, All)
+{
+    auto &&c = MakeCompressor("gzip");
+    EXPECT_TRUE(c);
+    c = MakeCompressor("??");
+    EXPECT_FALSE(c);
 }
 
-TEST(MakeDecompressor, All) {
-  auto &&c = MakeDecompressor("gzip");
-  EXPECT_TRUE(c);
-  c = MakeDecompressor("??");
-  EXPECT_FALSE(c);
+TEST(MakeDecompressor, All)
+{
+    auto &&c = MakeDecompressor("gzip");
+    EXPECT_TRUE(c);
+    c = MakeDecompressor("??");
+    EXPECT_FALSE(c);
 }
 
-TEST(CompressString, All) {
-  std::string original(1000, 'A');
-  auto c = Compress(MakeCompressor("gzip").get(), original);
-  EXPECT_TRUE(c);
-  auto d = Decompress(MakeDecompressor("gzip").get(), *c);
-  EXPECT_TRUE(d);
-  EXPECT_EQ(FlattenSlow(*d), original);
+TEST(CompressString, All)
+{
+    std::string original(1000, 'A');
+    auto c = Compress(MakeCompressor("gzip").get(), original);
+    EXPECT_TRUE(c);
+    auto d = Decompress(MakeDecompressor("gzip").get(), *c);
+    EXPECT_TRUE(d);
+    EXPECT_EQ(FlattenSlow(*d), original);
 }
 
-TEST(CompressNoncontiguousBuffer, All) {
-  NoncontiguousBufferBuilder nbb;
-  std::string original(1000, 'A');
-  nbb.Append(original.data(), original.size());
-  auto &&nb = nbb.DestructiveGet();
-  auto c = Compress(MakeCompressor("gzip").get(), nb);
-  EXPECT_TRUE(c);
-  auto d = Decompress(MakeDecompressor("gzip").get(), *c);
-  EXPECT_TRUE(d);
-  EXPECT_EQ(FlattenSlow(*d), original);
+TEST(CompressNoncontiguousBuffer, All)
+{
+    NoncontiguousBufferBuilder nbb;
+    std::string original(1000, 'A');
+    nbb.Append(original.data(), original.size());
+    auto &&nb = nbb.DestructiveGet();
+    auto c    = Compress(MakeCompressor("gzip").get(), nb);
+    EXPECT_TRUE(c);
+    auto d = Decompress(MakeDecompressor("gzip").get(), *c);
+    EXPECT_TRUE(d);
+    EXPECT_EQ(FlattenSlow(*d), original);
 }
 
-TEST(Decompressor, Empty) {
-  for (auto &&algo : algos) {
-    auto res = Decompress(MakeDecompressor(algo).get(), "");
+TEST(Decompressor, Empty)
+{
+    for (auto &&algo : algos) {
+        auto res = Decompress(MakeDecompressor(algo).get(), "");
 
-    // Failure in decompressing empty buffer is not an error. So long as
-    // decompressing a buffer produced by `Compress(..., "")` works correctly,
-    // we're fine.
-    if (res) {
-      // However, if the decompression does succeed, the resulting buffer should
-      // be empty.
-      EXPECT_TRUE(res->Empty());
+        // Failure in decompressing empty buffer is not an error. So long as
+        // decompressing a buffer produced by `Compress(..., "")` works correctly,
+        // we're fine.
+        if (res) {
+            // However, if the decompression does succeed, the resulting buffer should
+            // be empty.
+            EXPECT_TRUE(res->Empty());
+        }
     }
-  }
 }
 
-TEST(Decompressor, Invalid) {
-  for (auto &&algo : algos) {
-    auto res =
-        Decompress(MakeDecompressor(algo).get(),
-                   "this buffer is likely an invalid compressed buffer.");
-    EXPECT_FALSE(res);
-  }
+TEST(Decompressor, Invalid)
+{
+    for (auto &&algo : algos) {
+        auto res = Decompress(MakeDecompressor(algo).get(), "this buffer is likely an invalid compressed buffer.");
+        EXPECT_FALSE(res);
+    }
 }
-} // namespace tile
+}// namespace tile

tile/base/config/config.cc

@@ -1,113 +0,0 @@
-#include "tile/base/config/config.h"
-#include "tile/base/thread/unique_lock.h"
-
-namespace tile {
-namespace util {
-bool Config::Has(const Slice &key) const {
-  UniqueLock<tile::Mutex> lock(mutex_);
-  std::string value;
-  return GetRaw(key, &value);
-}
-
-void Config::Remove(const Slice &key) {}
-
-void Config::EnableEvents(bool enable) { events_enabled_ = enable; }
-bool Config::EventsEnabled() const { return events_enabled_; }
-
-Config::Keys Config::keys(const Slice &root) const {
-  UniqueLock<tile::Mutex> lock(mutex_);
-  return Enumerate(root);
-}
-
-#define TILE_DEFINE_CONFIG_GETTER(type, name)                                  \
-  std::optional<type> Config::Get##name(const Slice &key) const {              \
-    std::string value;                                                         \
-    if (GetRaw(key, &value)) {                                                 \
-      auto opt = TryParseTraits<type>::TryParse(value);                        \
-      if (opt.has_value()) {                                                   \
-        return *opt;                                                           \
-      } else {                                                                 \
-        return std::nullopt;                                                   \
-      }                                                                        \
-    } else {                                                                   \
-      return std::nullopt;                                                     \
-    }                                                                          \
-  }                                                                            \
-  type Config::Get##name(const Slice &key, type default_value) const {         \
-    auto opt = Get##name(key);                                                 \
-    if (opt.has_value()) {                                                     \
-      return *opt;                                                             \
-    } else {                                                                   \
-      return default_value;                                                    \
-    }                                                                          \
-  }
-
-#define TILE_DEFINE_CONFIG_SETTER(type, name)                                  \
-  void Config::Set##name(const Slice &key, type value) {                       \
-    SetRawWithEvent(key, Format("{}", value));                                 \
-  }
-
-std::optional<std::string> Config::GetString(const Slice &key) const {
-  std::string value;
-  UniqueLock<tile::Mutex> lock(mutex_);
-  if (GetRaw(key, &value)) {
-    return value;
-  } else {
-    return std::nullopt;
-  }
-}
-
-std::string Config::GetString(const Slice &key,
-                              std::string default_value) const {
-  auto opt = GetString(key);
-  return opt.has_value() ? *opt : default_value;
-}
-
-void Config::SetString(const Slice &key, const std::string &value) {
-  SetRawWithEvent(key, value);
-}
-void Config::SetBool(const Slice &key, bool value) {
-  SetRawWithEvent(key, value ? "true" : "false");
-}
-
-TILE_DEFINE_CONFIG_GETTER(int, Int)
-TILE_DEFINE_CONFIG_GETTER(unsigned int, UInt)
-TILE_DEFINE_CONFIG_GETTER(int16_t, Int16)
-TILE_DEFINE_CONFIG_GETTER(int32_t, Int32)
-TILE_DEFINE_CONFIG_GETTER(int64_t, Int64)
-TILE_DEFINE_CONFIG_GETTER(uint16_t, UInt16)
-TILE_DEFINE_CONFIG_GETTER(uint32_t, UInt32)
-TILE_DEFINE_CONFIG_GETTER(uint64_t, UInt64)
-TILE_DEFINE_CONFIG_GETTER(double, Double)
-TILE_DEFINE_CONFIG_GETTER(bool, Bool)
-
-TILE_DEFINE_CONFIG_SETTER(int, Int)
-TILE_DEFINE_CONFIG_SETTER(unsigned int, UInt)
-TILE_DEFINE_CONFIG_SETTER(int16_t, Int16)
-TILE_DEFINE_CONFIG_SETTER(int32_t, Int32)
-TILE_DEFINE_CONFIG_SETTER(int64_t, Int64)
-TILE_DEFINE_CONFIG_SETTER(uint16_t, UInt16)
-TILE_DEFINE_CONFIG_SETTER(uint32_t, UInt32)
-TILE_DEFINE_CONFIG_SETTER(uint64_t, UInt64)
-TILE_DEFINE_CONFIG_SETTER(double, Double)
-
-void Config::SetRawWithEvent(const Slice &key, const std::string &value) {
-  if (events_enabled_) {
-    OnChanging(key, value);
-  }
-
-  {
-    UniqueLock<tile::Mutex> lock(mutex_);
-    SetRaw(key, value);
-  }
-
-  if (events_enabled_) {
-    OnChanged(key, value);
-  }
-}
-
-Config::~Config() {}
-
-} // namespace util
-
-} // namespace tile

tile/base/config/config.h

@@ -1,127 +0,0 @@
-#ifndef TILE_BASE_CONFIG_CONFIG_H
-#define TILE_BASE_CONFIG_CONFIG_H
-
-#pragma once
-#include "tile/base/optional.h"
-#include "tile/base/ref_ptr.h"
-#include "tile/base/slice.h"
-#include "tile/base/string.h"
-#include "tile/base/thread/mutex.h"
-#include "tile/sigslot/sigslot.h"
-#include <cstdint>
-
-namespace tile {
-namespace util {
-class Config : public RefCounted<Config> {
-public:
-  using Keys = std::vector<std::string>;
-  using Ptr = RefPtr<Config>;
-
-  // events
-  // Key, Value
-  sigslot::signal2<const Slice &, const Slice &> OnChanging;
-  // Key, Value
-  sigslot::signal2<const Slice &, const Slice &> OnChanged;
-  // Key
-  sigslot::signal1<const Slice &> OnRemoving;
-  // Key
-  sigslot::signal1<const Slice &> OnRemoved;
-
-  bool Has(const Slice &key) const;
-  void Remove(const Slice &key);
-  void EnableEvents(bool enable = true);
-  bool EventsEnabled() const;
-
-  Keys keys(const Slice &root = "") const;
-
-#define TILE_DECLARE_CONFIG_GETTER(type, name)                                 \
-  std::optional<type> Get##name(const Slice &key) const;                       \
-  type Get##name(const Slice &key, type default_value) const;
-
-#define TILE_DECLARE_CONFIG_SETTER(type, name)                                 \
-  virtual void Set##name(const Slice &key, type value);
-
-  std::string GetRawString(const Slice &key, const Slice &default_value) const;
-  // std::stirng GetString()
-  // int GetInt()
-  // unsigned int GetUInt()
-  // int16_t GetInt16()
-  // int32_t GetInt32()
-  // int64_t GetInt64()
-  // uint16_t GetUInt16()
-  // uint32_t GetUInt32()
-  // uint64_t GetUInt64()
-  // double GetDouble()
-  // bool GetBool()
-
-  // getters
-  TILE_DECLARE_CONFIG_GETTER(std::string, String)
-  TILE_DECLARE_CONFIG_GETTER(int, Int)
-  TILE_DECLARE_CONFIG_GETTER(unsigned int, UInt)
-  TILE_DECLARE_CONFIG_GETTER(int16_t, Int16)
-  TILE_DECLARE_CONFIG_GETTER(int32_t, Int32)
-  TILE_DECLARE_CONFIG_GETTER(int64_t, Int64)
-  TILE_DECLARE_CONFIG_GETTER(uint16_t, UInt16)
-  TILE_DECLARE_CONFIG_GETTER(uint32_t, UInt32)
-  TILE_DECLARE_CONFIG_GETTER(uint64_t, UInt64)
-  TILE_DECLARE_CONFIG_GETTER(double, Double)
-  TILE_DECLARE_CONFIG_GETTER(bool, Bool)
-
-protected:
-  // setters
-  // SetString(const Slice &key, const std::string &value)
-  // SetInt(const Slice &key, int value)
-  // SetUInt(const Slice &key, unsigned int value)
-  // SetInt16(const Slice &key, int16_t value)
-  // SetInt32(const Slice &key, int32_t value)
-  // SetInt64(const Slice &key, int64_t value)
-  // SetUInt16(const Slice &key, uint16_t value)
-  // SetUInt32(const Slice &key, uint32_t value)
-  // SetUInt64(const Slice &key, uint64_t value)
-  // SetDouble(const Slice &key, double value)
-  // SetBool(const Slice &key, bool value)
-  TILE_DECLARE_CONFIG_SETTER(const std::string &, String)
-  TILE_DECLARE_CONFIG_SETTER(int, Int)
-  TILE_DECLARE_CONFIG_SETTER(unsigned int, UInt)
-  TILE_DECLARE_CONFIG_SETTER(int16_t, Int16)
-  TILE_DECLARE_CONFIG_SETTER(int32_t, Int32)
-  TILE_DECLARE_CONFIG_SETTER(int64_t, Int64)
-  TILE_DECLARE_CONFIG_SETTER(uint16_t, UInt16)
-  TILE_DECLARE_CONFIG_SETTER(uint32_t, UInt32)
-  TILE_DECLARE_CONFIG_SETTER(uint64_t, UInt64)
-  TILE_DECLARE_CONFIG_SETTER(double, Double)
-  TILE_DECLARE_CONFIG_SETTER(bool, Bool)
-
-#undef TILE_DECLARE_CONFIG_GETTER
-#undef TILE_DECLARE_CONFIG_SETTER
-
-protected:
-  class ScopedLock {
-  public:
-    explicit ScopedLock(const Config &config) : config_(config) {
-      config_.mutex_.Lock();
-    }
-    ~ScopedLock() { config_.mutex_.Unlock(); }
-
-  private:
-    const Config &config_;
-  };
-
-  virtual bool GetRaw(const Slice &key, std::string *value) const = 0;
-  virtual bool SetRaw(const Slice &key, const Slice &value) = 0;
-  virtual void RemoveRaw(const Slice &key) = 0;
-  virtual Keys Enumerate(const Slice &range) const = 0;
-  void SetRawWithEvent(const Slice &key, const std::string &value);
-  virtual ~Config();
-
-  friend class std::default_delete<Config>;
-  friend class LayeredConfig;
-
-private:
-  mutable Mutex mutex_;
-  bool events_enabled_{false};
-};
-} // namespace util
-} // namespace tile
-
-#endif // TILE_BASE_CONFIG_CONFIG_H

tile/base/config/configurable.h

@@ -2,18 +2,16 @@
 #define TILE_BASE_CONFIG_CONFIGURABLE_H
 
 #pragma once
-#include "tile/base/string.h"
+#include "tile/base/slice.h"
 
 namespace tile {
-namespace util {
 class Configurable {
-  Configurable();
-  virtual ~Configurable() = default;
-  virtual void SetProperty(const Slice &name, const Slice &value) = 0;
-  virtual std::string GetProperty(const Slice &name) const = 0;
+    Configurable();
+    virtual ~Configurable()                                         = default;
+    virtual void SetProperty(const Slice &name, const Slice &value) = 0;
+    virtual std::string GetProperty(const Slice &name) const        = 0;
 };
 
-} // namespace util
-} // namespace tile
+}// namespace tile
 
-#endif // TILE_BASE_CONFIG_CONFIGURABLE_H
+#endif// TILE_BASE_CONFIG_CONFIGURABLE_H

tile/base/config/configuration.cc

@@ -0,0 +1,138 @@
+#include "tile/base/config/configuration.h"
+
+#include "tile/base/string.h"
+#include "tile/base/thread/unique_lock.h"
+
+namespace tile {
+bool
+Configuration::Has(const Slice &key) const
+{
+    UniqueLock<tile::Mutex> lock(mutex_);
+    std::string value;
+    return GetRaw(key, &value);
+}
+
+void
+Configuration::Remove(const Slice &key)
+{
+    UniqueLock<tile::Mutex> lock(mutex_);
+    if (events_enabled_) { OnRemoving(key); }
+    RemoveRaw(key);
+    if (events_enabled_) { OnRemoved(key); }
+}
+
+void
+Configuration::EnableEvents(bool enable)
+{
+    events_enabled_ = enable;
+}
+
+bool
+Configuration::EventsEnabled() const
+{
+    return events_enabled_;
+}
+
+Configuration::Keys
+Configuration::keys(const Slice &root) const
+{
+    UniqueLock<tile::Mutex> lock(mutex_);
+    return Enumerate(root);
+}
+
+#define TILE_DEFINE_CONFIG_GETTER(type, name)                                                                          \
+    std::optional<type> Configuration::Get##name(const Slice &key) const                                               \
+    {                                                                                                                  \
+        std::string value;                                                                                             \
+        if (GetRaw(key, &value)) {                                                                                     \
+            auto opt = TryParseTraits<type>::TryParse(value);                                                          \
+            if (opt.has_value()) {                                                                                     \
+                return *opt;                                                                                           \
+            } else {                                                                                                   \
+                return std::nullopt;                                                                                   \
+            }                                                                                                          \
+        } else {                                                                                                       \
+            return std::nullopt;                                                                                       \
+        }                                                                                                              \
+    }                                                                                                                  \
+    type Configuration::Get##name(const Slice &key, type default_value) const                                          \
+    {                                                                                                                  \
+        auto opt = Get##name(key);                                                                                     \
+        if (opt.has_value()) {                                                                                         \
+            return *opt;                                                                                               \
+        } else {                                                                                                       \
+            return default_value;                                                                                      \
+        }                                                                                                              \
+    }
+
+#define TILE_DEFINE_CONFIG_SETTER(type, name)                                                                          \
+    void Configuration::Set##name(const Slice &key, type value) { SetRawWithEvent(key, Format("{}", value)); }
+
+std::optional<std::string>
+Configuration::GetString(const Slice &key) const
+{
+    std::string value;
+    UniqueLock<tile::Mutex> lock(mutex_);
+    if (GetRaw(key, &value)) {
+        return value;
+    } else {
+        return std::nullopt;
+    }
+}
+
+std::string
+Configuration::GetString(const Slice &key, std::string default_value) const
+{
+    auto opt = GetString(key);
+    return opt.has_value() ? *opt : default_value;
+}
+
+void
+Configuration::SetString(const Slice &key, const std::string &value)
+{
+    SetRawWithEvent(key, value);
+}
+
+void
+Configuration::SetBool(const Slice &key, bool value)
+{
+    SetRawWithEvent(key, value ? "true" : "false");
+}
+
+TILE_DEFINE_CONFIG_GETTER(int, Int)
+TILE_DEFINE_CONFIG_GETTER(unsigned int, UInt)
+TILE_DEFINE_CONFIG_GETTER(int16_t, Int16)
+TILE_DEFINE_CONFIG_GETTER(int32_t, Int32)
+TILE_DEFINE_CONFIG_GETTER(int64_t, Int64)
+TILE_DEFINE_CONFIG_GETTER(uint16_t, UInt16)
+TILE_DEFINE_CONFIG_GETTER(uint32_t, UInt32)
+TILE_DEFINE_CONFIG_GETTER(uint64_t, UInt64)
+TILE_DEFINE_CONFIG_GETTER(double, Double)
+TILE_DEFINE_CONFIG_GETTER(bool, Bool)
+
+TILE_DEFINE_CONFIG_SETTER(int, Int)
+TILE_DEFINE_CONFIG_SETTER(unsigned int, UInt)
+TILE_DEFINE_CONFIG_SETTER(int16_t, Int16)
+TILE_DEFINE_CONFIG_SETTER(int32_t, Int32)
+TILE_DEFINE_CONFIG_SETTER(int64_t, Int64)
+TILE_DEFINE_CONFIG_SETTER(uint16_t, UInt16)
+TILE_DEFINE_CONFIG_SETTER(uint32_t, UInt32)
+TILE_DEFINE_CONFIG_SETTER(uint64_t, UInt64)
+TILE_DEFINE_CONFIG_SETTER(double, Double)
+
+void
+Configuration::SetRawWithEvent(const Slice &key, const std::string &value)
+{
+    if (events_enabled_) { OnChanging(key, value); }
+
+    {
+        UniqueLock<tile::Mutex> lock(mutex_);
+        SetRaw(key, value);
+    }
+
+    if (events_enabled_) { OnChanged(key, value); }
+}
+
+Configuration::~Configuration() {}
+
+}// namespace tile

tile/base/config/configuration.h

@@ -0,0 +1,122 @@
+#ifndef TILE_BASE_CONFIG_CONFIGURATION_H
+#define TILE_BASE_CONFIG_CONFIGURATION_H
+
+#pragma once
+#include "tile/base/optional.h"
+#include "tile/base/ref_ptr.h"
+#include "tile/base/slice.h"
+#include "tile/base/thread/mutex.h"
+#include "tile/sigslot/sigslot.h"
+#include <cstdint>
+
+namespace tile {
+class Configuration : public RefCounted<Configuration> {
+public:
+    using Keys = std::vector<std::string>;
+    using Ptr  = RefPtr<Configuration>;
+
+    // events
+    // Key, Value
+    sigslot::signal2<const Slice &, const Slice &> OnChanging;
+    // Key, Value
+    sigslot::signal2<const Slice &, const Slice &> OnChanged;
+    // Key
+    sigslot::signal1<const Slice &> OnRemoving;
+    // Key
+    sigslot::signal1<const Slice &> OnRemoved;
+
+    bool Has(const Slice &key) const;
+    void Remove(const Slice &key);
+    void EnableEvents(bool enable = true);
+    bool EventsEnabled() const;
+
+    Keys keys(const Slice &root = "") const;
+
+#define TILE_DECLARE_CONFIG_GETTER(type, name)                                                                         \
+    std::optional<type> Get##name(const Slice &key) const;                                                             \
+    type Get##name(const Slice &key, type default_value) const;
+
+#define TILE_DECLARE_CONFIG_SETTER(type, name) virtual void Set##name(const Slice &key, type value);
+
+    std::string GetRawString(const Slice &key, const Slice &default_value) const;
+    // std::stirng GetString()
+    // int GetInt()
+    // unsigned int GetUInt()
+    // int16_t GetInt16()
+    // int32_t GetInt32()
+    // int64_t GetInt64()
+    // uint16_t GetUInt16()
+    // uint32_t GetUInt32()
+    // uint64_t GetUInt64()
+    // double GetDouble()
+    // bool GetBool()
+
+    // getters
+    TILE_DECLARE_CONFIG_GETTER(std::string, String)
+    TILE_DECLARE_CONFIG_GETTER(int, Int)
+    TILE_DECLARE_CONFIG_GETTER(unsigned int, UInt)
+    TILE_DECLARE_CONFIG_GETTER(int16_t, Int16)
+    TILE_DECLARE_CONFIG_GETTER(int32_t, Int32)
+    TILE_DECLARE_CONFIG_GETTER(int64_t, Int64)
+    TILE_DECLARE_CONFIG_GETTER(uint16_t, UInt16)
+    TILE_DECLARE_CONFIG_GETTER(uint32_t, UInt32)
+    TILE_DECLARE_CONFIG_GETTER(uint64_t, UInt64)
+    TILE_DECLARE_CONFIG_GETTER(double, Double)
+    TILE_DECLARE_CONFIG_GETTER(bool, Bool)
+
+protected:
+    // setters
+    // SetString(const Slice &key, const std::string &value)
+    // SetInt(const Slice &key, int value)
+    // SetUInt(const Slice &key, unsigned int value)
+    // SetInt16(const Slice &key, int16_t value)
+    // SetInt32(const Slice &key, int32_t value)
+    // SetInt64(const Slice &key, int64_t value)
+    // SetUInt16(const Slice &key, uint16_t value)
+    // SetUInt32(const Slice &key, uint32_t value)
+    // SetUInt64(const Slice &key, uint64_t value)
+    // SetDouble(const Slice &key, double value)
+    // SetBool(const Slice &key, bool value)
+    TILE_DECLARE_CONFIG_SETTER(const std::string &, String)
+    TILE_DECLARE_CONFIG_SETTER(int, Int)
+    TILE_DECLARE_CONFIG_SETTER(unsigned int, UInt)
+    TILE_DECLARE_CONFIG_SETTER(int16_t, Int16)
+    TILE_DECLARE_CONFIG_SETTER(int32_t, Int32)
+    TILE_DECLARE_CONFIG_SETTER(int64_t, Int64)
+    TILE_DECLARE_CONFIG_SETTER(uint16_t, UInt16)
+    TILE_DECLARE_CONFIG_SETTER(uint32_t, UInt32)
+    TILE_DECLARE_CONFIG_SETTER(uint64_t, UInt64)
+    TILE_DECLARE_CONFIG_SETTER(double, Double)
+    TILE_DECLARE_CONFIG_SETTER(bool, Bool)
+
+#undef TILE_DECLARE_CONFIG_GETTER
+#undef TILE_DECLARE_CONFIG_SETTER
+
+protected:
+    class ScopedLock {
+    public:
+        explicit ScopedLock(const Configuration &config) : config_(config) { config_.mutex_.Lock(); }
+
+        ~ScopedLock() { config_.mutex_.Unlock(); }
+
+    private:
+        const Configuration &config_;
+    };
+
+    virtual bool GetRaw(const Slice &key, std::string *value) const = 0;
+    virtual bool SetRaw(const Slice &key, const Slice &value)       = 0;
+    virtual void RemoveRaw(const Slice &key)                        = 0;
+    virtual Keys Enumerate(const Slice &range) const                = 0;
+    void SetRawWithEvent(const Slice &key, const std::string &value);
+    virtual ~Configuration();
+
+    friend class std::default_delete<Configuration>;
+    friend class LayeredConfiguration;
+
+private:
+    mutable Mutex mutex_;
+    bool events_enabled_{false};
+};
+}// namespace tile
+
+#endif// TILE_BASE_CONFIG_CONFIGURATION_H

tile/base/config/ini_file_config.cc

@@ -1,145 +0,0 @@
-#include "tile/base/config/ini_file_config.h"
-#include "tile/base/thread/scoped_lock.h"
-
-namespace tile {
-namespace util {
-
-IniFileConfig::IniFileConfig() {}
-// IniFileConfig::IniFileConfig(std::istream &istr) { load(istr); }
-// IniFileConfig::IniFileConfig(const std::string &path) { load(path); }
-IniFileConfig::~IniFileConfig() {}
-
-bool IniFileConfig::load(std::istream &istr) {
-  Config::ScopedLock lock(*this);
-  map_.clear();
-  section_key_.clear();
-  while (!istr.eof()) {
-    ParseLine(istr);
-  }
-  return true;
-}
-bool IniFileConfig::load(const std::string &path) {
-  std::ifstream istr(path);
-  if (istr.good()) {
-    return load(istr);
-  } else {
-    return false;
-  }
-}
-bool IniFileConfig::GetRaw(const Slice &key, std::string *value) const {
-  auto iter = map_.find(key.ToString());
-  if (iter != map_.end()) {
-    *value = iter->second;
-    return true;
-  } else {
-    return false;
-  }
-}
-bool IniFileConfig::SetRaw(const Slice &key, const Slice &value) {
-  map_[key] = value;
-  return true;
-}
-
-void IniFileConfig::RemoveRaw(const Slice &key) {
-  std::string prefix = key;
-  if (!prefix.empty()) {
-    prefix.push_back('.');
-  }
-  IStringMap::iterator it = map_.begin();
-  IStringMap::iterator cur;
-  while (it != map_.end()) {
-    if (EqualsIgnoreCase(cur->first, key) ||
-        EqualsIgnoreCase(cur->first, prefix)) {
-      it = map_.erase(cur);
-    } else {
-      ++it;
-    }
-  }
-}
-
-Config::Keys IniFileConfig::Enumerate(const Slice &key) const {
-  Config::Keys range;
-  std::set<Slice> keys;
-  std::string prefix = key.ToString();
-  if (prefix.empty()) {
-    prefix.push_back('.');
-  }
-
-  std::string::size_type psize = prefix.size();
-  for (const auto &p : map_) {
-    auto &key = p.first;
-    if (EqualsIgnoreCase(key, prefix, psize)) {
-      std::string::size_type end = key.find('.', psize);
-      std::string subkey;
-      if (end == std::string::npos) {
-        subkey = key.substr(psize);
-      } else {
-        subkey = key.substr(psize, end - psize);
-      }
-
-      if (keys.find(subkey) == keys.end()) {
-        keys.insert(subkey);
-        range.push_back(subkey);
-      }
-    }
-  }
-  return range;
-}
-
-void IniFileConfig::ParseLine(std::istream &istr) {
-  static const int eof = std::char_traits<char>::eof();
-  auto ReadLine = [&](std::string *line) {
-    line->clear();
-    while (true) {
-      int c = istr.get();
-      if (c == eof || c == '\n') {
-        return c != eof;
-      } else {
-        *line += (char)c;
-      }
-    }
-  };
-
-  std::string raw_line;
-  while (ReadLine(&raw_line)) {
-    if (raw_line.empty()) {
-      continue;
-    }
-    Slice line = TrimLeft(raw_line);
-    if (line.empty() || line[0] == ';' || line[0] == '#') {
-      // skip empty line
-      // skip comment line ; or #
-      continue;
-    }
-
-    // parse section
-    if (line[0] == '[') {
-      auto pos = line.find(']');
-      if (pos == Slice::npos) {
-        section_key_ = Trim(line.substr(1));
-      } else {
-        section_key_ = Trim(line.substr(1, pos - 1));
-      }
-    } else {
-      auto strs = Split(line, "=", true, 2);
-      std::string full_key = section_key_;
-      if (!full_key.empty()) {
-        full_key.push_back('.');
-      }
-      full_key.append(Trim(strs[0]));
-      if (strs.size() > 1) {
-        map_[full_key] = Trim(strs[1]);
-      } else {
-        map_[full_key] = "";
-      }
-    }
-  }
-}
-bool IniFileConfig::ICompare::operator()(const std::string &s1,
-                                         const std::string &s2) const {
-  auto len = std::min(s1.size(), s2.size());
-  return strncmp(s1.c_str(), s2.c_str(), len) < 0;
-}
-
-} // namespace util
-} // namespace tile

tile/base/config/ini_file_config.h

@@ -1,40 +0,0 @@
-#ifndef TILE_BASE_CONFIG_INI_FILE_CONFIG_H
-#define TILE_BASE_CONFIG_INI_FILE_CONFIG_H
-
-#pragma once
-
-#include "tile/base/config/config.h"
-#include <map>
-
-namespace tile {
-namespace util {
-class IniFileConfig : public Config {
-public:
-  using Ptr = RefPtr<IniFileConfig>;
-
-  IniFileConfig();
-  ~IniFileConfig() override;
-  // IniFileConfig(std::istream &istr);
-  // IniFileConfig(const std::string &path);
-  bool load(std::istream &istr);
-  bool load(const std::string &path);
-
-protected:
-  bool GetRaw(const Slice &key, std::string *value) const override;
-  bool SetRaw(const Slice &key, const Slice &value) override;
-  void RemoveRaw(const Slice &key) override;
-  Keys Enumerate(const Slice &range) const override;
-
-private:
-  void ParseLine(std::istream &istr);
-  struct ICompare {
-    bool operator()(const std::string &s1, const std::string &s2) const;
-  };
-  typedef std::map<std::string, std::string, ICompare> IStringMap;
-  IStringMap map_;
-  std::string section_key_;
-};
-} // namespace util
-} // namespace tile
-
-#endif // TILE_BASE_CONFIG_INI_FILE_CONFIG_H

tile/base/config/ini_file_config_test.cc

@@ -1,46 +0,0 @@
-#include "tile/base/config/ini_file_config.h"
-#include "gtest/gtest.h"
-
-const char *kIniFileConfig = R"(
-# comment 1
-; comment 2
-  # commet 3
-  ; commment 4
-a=1
-[sec1]
-a=2
-[sec3]
-a=3
-[sec2.kk]
-a=4
-)";
-
-namespace tile {
-namespace util {
-
-static_assert(!detail::HasClassofImpl<IniFileConfig, Config>::value, "");
-
-TEST(IniFileConfig, LoadFromIStream) {
-  std::stringstream ss(kIniFileConfig);
-  Config::Ptr config = MakeRefCounted<IniFileConfig>();
-  ASSERT_FALSE(config->Has("a"));
-  ASSERT_FALSE(config->Has("sec1.a"));
-  ASSERT_FALSE(config->Has("sec3.a"));
-  if (config.Is<IniFileConfig>()) {
-    IniFileConfig::Ptr ini = config.As<IniFileConfig>();
-    ASSERT_TRUE(ini->load(ss));
-  }
-  ASSERT_TRUE(config->Has("a"));
-  ASSERT_TRUE(config->Has("sec1.a"));
-  ASSERT_TRUE(config->Has("sec3.a"));
-  ASSERT_TRUE(config->Has("sec2.kk.a"));
-
-  ASSERT_TRUE(config->GetInt("a"));
-  ASSERT_TRUE(config->GetInt("sec1.a"));
-  ASSERT_EQ(1, *config->GetInt("a"));
-  ASSERT_EQ(2, *config->GetInt("sec1.a"));
-  ASSERT_EQ(3, *config->GetInt("sec3.a"));
-  ASSERT_EQ(4, *config->GetInt("sec2.kk.a"));
-}
-} // namespace util
-} // namespace tile

tile/base/config/ini_file_configuration.cc

@@ -0,0 +1,152 @@
+#include "tile/base/config/ini_file_configuration.h"
+
+#include "tile/base/string.h"
+#include "tile/base/thread/scoped_lock.h"
+
+namespace tile {
+
+IniFileConfiguration::IniFileConfiguration() {}
+
+// IniFileConfig::IniFileConfig(std::istream &istr) { load(istr); }
+// IniFileConfig::IniFileConfig(const std::string &path) { load(path); }
+IniFileConfiguration::~IniFileConfiguration() {}
+
+bool
+IniFileConfiguration::load(std::istream &istr)
+{
+    if (!istr.good()) { return false; }
+
+    Configuration::ScopedLock lock(*this);
+    map_.clear();
+    section_key_.clear();
+    while (!istr.eof()) { ParseLine(istr); }
+    return true;
+}
+
+bool
+IniFileConfiguration::load(const std::string &path)
+{
+    std::ifstream istr(path);
+    return load(istr);
+}
+
+bool
+IniFileConfiguration::GetRaw(const Slice &key, std::string *value) const
+{
+    auto iter = map_.find(key.ToString());
+    if (iter != map_.end()) {
+        *value = iter->second;
+        return true;
+    } else {
+        return false;
+    }
+}
+
+bool
+IniFileConfiguration::SetRaw(const Slice &key, const Slice &value)
+{
+    map_[key] = value;
+    return true;
+}
+
+void
+IniFileConfiguration::RemoveRaw(const Slice &key)
+{
+    std::string prefix = key;
+    if (!prefix.empty()) { prefix.push_back('.'); }
+    IStringMap::iterator it = map_.begin();
+    IStringMap::iterator cur;
+    while (it != map_.end()) {
+        if (EqualsIgnoreCase(cur->first, key) || EqualsIgnoreCase(cur->first, prefix)) {
+            it = map_.erase(cur);
+        } else {
+            ++it;
+        }
+    }
+}
+
+Configuration::Keys
+IniFileConfiguration::Enumerate(const Slice &key) const
+{
+    Configuration::Keys range;
+    std::set<Slice> keys;
+    std::string prefix = key.ToString();
+    if (prefix.empty()) { prefix.push_back('.'); }
+
+    std::string::size_type psize = prefix.size();
+    for (const auto &p : map_) {
+        auto &key = p.first;
+        if (EqualsIgnoreCase(key, prefix, psize)) {
+            std::string::size_type end = key.find('.', psize);
+            std::string subkey;
+            if (end == std::string::npos) {
+                subkey = key.substr(psize);
+            } else {
+                subkey = key.substr(psize, end - psize);
+            }
+
+            if (keys.find(subkey) == keys.end()) {
+                keys.insert(subkey);
+                range.push_back(subkey);
+            }
+        }
+    }
+    return range;
+}
+
+void
+IniFileConfiguration::ParseLine(std::istream &istr)
+{
+    static const int eof = std::char_traits<char>::eof();
+    auto ReadLine        = [&](std::string *line) {
+        line->clear();
+        while (true) {
+            int c = istr.get();
+            if (c == eof || c == '\n') {
+                return c != eof;
+            } else {
+                *line += (char) c;
+            }
+        }
+    };
+
+    std::string raw_line;
+    while (ReadLine(&raw_line)) {
+        if (raw_line.empty()) { continue; }
+        Slice line = TrimLeft(raw_line);
+        if (line.empty() || line[0] == ';' || line[0] == '#') {
+            // skip empty line
+            // skip comment line ; or #
+            continue;
+        }
+
+        // parse section
+        if (line[0] == '[') {
+            auto pos = line.find(']');
+            if (pos == Slice::npos) {
+                section_key_ = Trim(line.substr(1));
+            } else {
+                section_key_ = Trim(line.substr(1, pos - 1));
+            }
+        } else {
+            auto strs            = Split(line, "=", true, 2);
+            std::string full_key = section_key_;
+            if (!full_key.empty()) { full_key.push_back('.'); }
+            full_key.append(Trim(strs[0]));
+            if (strs.size() > 1) {
+                map_[full_key] = Trim(strs[1]);
+            } else {
+                map_[full_key] = "";
+            }
+        }
+    }
+}
+
+bool
+IniFileConfiguration::ICompare::operator()(const std::string &s1, const std::string &s2) const
+{
+    auto len = std::min(s1.size(), s2.size());
+    return strncmp(s1.c_str(), s2.c_str(), len) < 0;
+}
+
+}// namespace tile

tile/base/config/ini_file_configuration.h

@@ -0,0 +1,40 @@
+#ifndef TILE_BASE_CONFIG_INI_FILE_CONFIG_H
+#define TILE_BASE_CONFIG_INI_FILE_CONFIG_H
+
+#pragma once
+
+#include "tile/base/config/configuration.h"
+#include <map>
+
+namespace tile {
+class IniFileConfiguration : public Configuration {
+public:
+    using Ptr = RefPtr<IniFileConfiguration>;
+
+    IniFileConfiguration();
+    ~IniFileConfiguration() override;
+    // IniFileConfig(std::istream &istr);
+    // IniFileConfig(const std::string &path);
+    bool load(std::istream &istr);
+    bool load(const std::string &path);
+
+protected:
+    bool GetRaw(const Slice &key, std::string *value) const override;
+    bool SetRaw(const Slice &key, const Slice &value) override;
+    void RemoveRaw(const Slice &key) override;
+    Keys Enumerate(const Slice &range) const override;
+
+private:
+    void ParseLine(std::istream &istr);
+
+    struct ICompare {
+        bool operator()(const std::string &s1, const std::string &s2) const;
+    };
+
+    typedef std::map<std::string, std::string, ICompare> IStringMap;
+    IStringMap map_;
+    std::string section_key_;
+};
+}// namespace tile
+
+#endif// TILE_BASE_CONFIG_INI_FILE_CONFIG_H

tile/base/config/ini_file_configuration_test.cc

@@ -0,0 +1,45 @@
+#include "tile/base/config/ini_file_configuration.h"
+#include "gtest/gtest.h"
+
+const char *kIniFileConfig = R"(
+# comment 1
+; comment 2
+  # commet 3
+  ; commment 4
+a=1
+[sec1]
+a=2
+[sec3]
+a=3
+[sec2.kk]
+a=4
+)";
+
+namespace tile {
+
+static_assert(!detail::HasClassofImpl<IniFileConfiguration, Configuration>::value, "");
+
+TEST(IniFileConfig, LoadFromIStream)
+{
+    std::stringstream ss(kIniFileConfig);
+    Configuration::Ptr config = MakeRefCounted<IniFileConfiguration>();
+    ASSERT_FALSE(config->Has("a"));
+    ASSERT_FALSE(config->Has("sec1.a"));
+    ASSERT_FALSE(config->Has("sec3.a"));
+    if (config.Is<IniFileConfiguration>()) {
+        IniFileConfiguration::Ptr ini = config.As<IniFileConfiguration>();
+        ASSERT_TRUE(ini->load(ss));
+    }
+    ASSERT_TRUE(config->Has("a"));
+    ASSERT_TRUE(config->Has("sec1.a"));
+    ASSERT_TRUE(config->Has("sec3.a"));
+    ASSERT_TRUE(config->Has("sec2.kk.a"));
+
+    ASSERT_TRUE(config->GetInt("a"));
+    ASSERT_TRUE(config->GetInt("sec1.a"));
+    ASSERT_EQ(1, *config->GetInt("a"));
+    ASSERT_EQ(2, *config->GetInt("sec1.a"));
+    ASSERT_EQ(3, *config->GetInt("sec3.a"));
+    ASSERT_EQ(4, *config->GetInt("sec2.kk.a"));
+}
+}// namespace tile

tile/base/config/json_configuration.cc

@@ -0,0 +1,153 @@
+#include "tile/base/config/json_configuration.h"
+
+#include "tile/base/logging.h"
+#include "tile/base/string.h"
+
+namespace tile {
+JSONConfiguration::JSONConfiguration() : object_() {}
+
+JSONConfiguration::~JSONConfiguration() {}
+
+bool
+JSONConfiguration::load(const std::string &path)
+{
+    std::ifstream istr(path);
+    return load(istr);
+}
+
+bool
+JSONConfiguration::load(std::istream &istr)
+{
+    if (!istr.good()) { return false; }
+
+    Configuration::ScopedLock _(*this);
+    object_.clear();
+    Json::Reader reader;
+    return reader.parse(istr, object_, true);
+}
+
+void
+JSONConfiguration::SetInt(const Slice &key, int value)
+{
+    Configuration::ScopedLock _(*this);
+    SetValue(key, value);
+}
+
+void
+JSONConfiguration::SetBool(const Slice &key, bool value)
+{
+    Configuration::ScopedLock _(*this);
+    SetValue(key, value);
+}
+
+void
+JSONConfiguration::SetDouble(const Slice &key, double value)
+{
+    Configuration::ScopedLock _(*this);
+    SetValue(key, value);
+}
+
+void
+JSONConfiguration::SetString(const Slice &key, const std::string &value)
+{
+    Configuration::ScopedLock _(*this);
+    SetValue(key, value);
+}
+
+void
+JSONConfiguration::RemoveRaw(const Slice &key)
+{
+    Json::Value *root;
+    Slice last_part;
+    if (!FindStart(key, &last_part, &root)) { return; }
+    root->removeMember(last_part);
+}
+
+std::string
+JSONConfiguration::Dump() const
+{
+    Configuration::ScopedLock _(*this);
+    return object_.toStyledString();
+}
+
+bool
+JSONConfiguration::GetRaw(const Slice &key, std::string *value) const
+{
+    auto keys = Split(key, '.');
+    auto root = object_;
+    for (std::size_t i = 0; i < keys.size(); ++i) {
+        const auto &cur_key = keys[i];
+        if (cur_key.empty()) {
+            TILE_LOG_ERROR("Invalid key: {}", key);
+            return false;
+        }
+        if (!root.isMember(cur_key)) { return false; }
+        root = root[cur_key];
+    }
+
+    if (root.isConvertibleTo(Json::stringValue)) {
+        *value = root.asString();
+    } else {
+        *value = root.toStyledString();
+    }
+    return true;
+}
+
+bool
+JSONConfiguration::SetRaw(const Slice &key, const Slice &value)
+{
+    return SetValue(key, value.ToString());
+}
+
+Configuration::Keys
+JSONConfiguration::Enumerate(const Slice &range) const
+{
+    Configuration::Keys key_set;
+    std::string prefix = range;
+    if (!prefix.empty()) { prefix += "."; }
+
+    auto keys = Split(range, '.');
+    auto root = object_;
+    for (std::size_t i = 0; i < keys.size(); ++i) {
+        const auto &cur_key = keys[i];
+        if (cur_key.empty()) {
+            TILE_LOG_ERROR("Invalid range: {}", range);
+            return key_set;
+        }
+        if (!root.isMember(cur_key)) { return key_set; }
+        root = root[cur_key];
+    }
+
+    for (const auto &key : root.getMemberNames()) { key_set.push_back(prefix + key); }
+    return key_set;
+}
+
+bool
+JSONConfiguration::FindStart(const Slice &key, Slice *last_part, Json::Value **parent_obj)
+{
+    auto keys = Split(key, '.');
+    if (keys.empty()) { return false; }
+
+    Json::Value *root = &object_;
+    for (std::size_t i = 0; i < keys.size() - 1; ++i) {
+        const auto &cur_key = keys[i];
+        if (cur_key.empty()) {
+            TILE_LOG_ERROR("Invalid key: {}", key);
+            return false;
+        }
+
+        if (!root->isMember(cur_key)) {
+            (*root)[cur_key] = Json::Value(Json::objectValue);
+        } else if (!(*root)[cur_key].isObject()) {
+            TILE_LOG_ERROR("only leaf nodes can be set: key: {}, cur_key(idx={}): {}", key, i, cur_key);
+            return false;
+        }
+        root = &(*root)[cur_key];
+    }
+
+    *last_part  = keys.back();
+    *parent_obj = root;
+    return true;
+}
+
+}// namespace tile

tile/base/config/json_configuration.h

@@ -0,0 +1,50 @@
+#ifndef TILE_BASE_CONFIG_JSON_CONFIGURATION_H
+#define TILE_BASE_CONFIG_JSON_CONFIGURATION_H
+
+#pragma once
+
+#include "tile/base/config/configuration.h"
+#include "json/json.h"
+
+namespace tile {
+class JSONConfiguration : public Configuration {
+public:
+    using Ptr = RefPtr<JSONConfiguration>;
+    JSONConfiguration();
+    ~JSONConfiguration() override;
+    bool load(const std::string &path);
+    bool load(std::istream &istr);
+
+    void SetInt(const Slice &key, int value) override;
+    void SetBool(const Slice &key, bool value) override;
+    void SetDouble(const Slice &key, double value) override;
+    void SetString(const Slice &key, const std::string &value) override;
+    void RemoveRaw(const Slice &key) override;
+
+    std::string Dump() const;
+
+protected:
+    bool GetRaw(const Slice &key, std::string *value) const override;
+    bool SetRaw(const Slice &key, const Slice &value) override;
+    Keys Enumerate(const Slice &range) const override;
+
+private:
+    bool FindStart(const Slice &key, Slice *last_prt, Json::Value **parent_obj);
+    template<typename T>
+    bool SetValue(const Slice &key, T value);
+    Json::Value object_;
+};
+
+template<typename T>
+bool
+JSONConfiguration::SetValue(const Slice &key, T value)
+{
+    Slice last_part;
+    Json::Value *root;
+    if (!FindStart(key, &last_part, &root)) { return false; }
+    (*root)[last_part] = Json::Value(value);
+    return true;
+}
+}// namespace tile
+
+#endif// TILE_BASE_CONFIG_JSON_CONFIGURATION_H

tile/base/config/json_configuration_test.cc

@@ -0,0 +1,100 @@
+#include "tile/base/config/json_configuration.h"
+
+#include "gmock/gmock-matchers.h"
+#include "gtest/gtest.h"
+
+namespace tile {
+namespace {
+const char *kJsonConfig = R"(
+    {
+        "key1": "value1",
+        "key2": 2,
+        "key3": 3.0,
+        "key4": true,
+        "key5": {
+            "key51": "value51",
+            "key52": 52
+        }
+    }
+    )";
+}
+
+TEST(JSONConfiguration, Load)
+{
+    JSONConfiguration config;
+    std::istringstream istr(kJsonConfig);
+    ASSERT_TRUE(config.load(istr));
+}
+
+TEST(JSONConfiguration, Has)
+{
+    JSONConfiguration config;
+    std::istringstream istr(kJsonConfig);
+    ASSERT_TRUE(config.load(istr));
+
+    ASSERT_TRUE(config.Has("key1"));
+    ASSERT_TRUE(config.Has("key2"));
+    ASSERT_TRUE(config.Has("key3"));
+    ASSERT_TRUE(config.Has("key4"));
+    ASSERT_TRUE(config.Has("key5"));
+    ASSERT_TRUE(config.Has("key5.key51"));
+    ASSERT_TRUE(config.Has("key5.key52"));
+}
+
+TEST(JSONConfiguration, SampleSet)
+{
+    JSONConfiguration config;
+    std::istringstream istr(kJsonConfig);
+    ASSERT_TRUE(config.load(istr));
+    ASSERT_TRUE(config.GetInt32("key2"));
+    ASSERT_EQ(*config.GetInt32("key2"), 2);
+
+    config.SetInt("key2", 20);
+    ASSERT_TRUE(config.GetInt32("key2"));
+    ASSERT_EQ(20, *config.GetInt32("key2")) << config.Dump();
+
+    config.SetDouble("key3", 30.0);
+    ASSERT_TRUE(config.GetDouble("key3"));
+    ASSERT_NEAR(30.0, *config.GetDouble("key3"), 0.0001) << config.Dump();
+
+    config.SetBool("key4", false);
+    ASSERT_TRUE(config.GetBool("key4"));
+    ASSERT_FALSE(*config.GetBool("key4")) << config.Dump();
+}
+
+TEST(JSONConfiguration, LayeredSet)
+{
+    JSONConfiguration config;
+    std::istringstream istr(kJsonConfig);
+    ASSERT_TRUE(config.load(istr));
+
+    // ASSERT_TRUE(config.GetInt32("key5.key52"));
+    config.SetInt("key5.key52", 520);
+    ASSERT_TRUE(config.GetInt32("key5.key52")) << config.Dump();
+    ASSERT_EQ(520, *config.GetInt32("key5.key52")) << config.Dump();
+
+    // override by other type
+    config.SetBool("key5.key52", false);
+    ASSERT_TRUE(config.GetBool("key5.key52")) << config.Dump();
+    ASSERT_FALSE(*config.GetBool("key5.key52")) << config.Dump();
+}
+
+TEST(json_configuration, Enumerate)
+{
+    JSONConfiguration config;
+    std::istringstream istr(kJsonConfig);
+    ASSERT_TRUE(config.load(istr));
+    auto keys = config.keys("");
+    ASSERT_EQ(5, keys.size());
+    ASSERT_THAT(keys, ::testing::UnorderedElementsAre("key1", "key2", "key3", "key4", "key5"));
+
+    keys = config.keys("key5");
+    ASSERT_EQ(2, keys.size());
+    ASSERT_THAT(keys, ::testing::UnorderedElementsAre("key5.key51", "key5.key52"));
+
+    config.Remove("key5.key51");
+    keys = config.keys("key5");
+    ASSERT_EQ("key5.key52", keys[0]);
+}
+
+}// namespace tile

tile/base/config/layered_config.cc

@@ -1,129 +0,0 @@
-#include "tile/base/config/layered_config.h"
-
-namespace tile {
-namespace util {
-
-LayeredConfig::LayeredConfig() {}
-LayeredConfig::~LayeredConfig() {}
-
-void LayeredConfig::Add(Config::Ptr cfg) { Add(cfg, highest(), false); }
-
-void LayeredConfig::Add(Config::Ptr cfg, int priority) {
-  Add(cfg, priority, false);
-}
-
-void LayeredConfig::Add(Config::Ptr cfg, const std::string &label) {
-  Add(cfg, label, highest(), false);
-}
-
-void LayeredConfig::Add(Config::Ptr cfg, const std::string &label,
-                        int priority) {
-  Add(cfg, label, priority, false);
-}
-
-void LayeredConfig::Add(Config::Ptr cfg, const std::string &label,
-                        bool writeable) {
-  Add(cfg, label, highest(), writeable);
-}
-
-void LayeredConfig::Add(Config::Ptr cfg, const std::string &label, int priority,
-                        bool writeable) {
-  Config::ScopedLock lock(*this);
-  ConfigItem item;
-  item.cfg = cfg;
-  item.priority = priority;
-  item.writeable = writeable;
-  item.label = label;
-  auto it = configs_.begin();
-  while (it != configs_.end() && it->priority < priority) {
-    ++it;
-  }
-  configs_.insert(it, item);
-}
-
-void LayeredConfig::Add(Config::Ptr cfg, int priority, bool writeable) {
-  Add(cfg, std::string(), priority, writeable);
-}
-void LayeredConfig::AddWriteable(Config::Ptr cfg, int priority) {
-  Add(cfg, priority, true);
-}
-
-Config::Ptr LayeredConfig::Find(const Slice &label) const {
-  Config::ScopedLock lock(*this);
-
-  for (const auto &conf : configs_) {
-    if (conf.label == label) {
-      return conf.cfg;
-    }
-  }
-  return 0;
-}
-
-void LayeredConfig::RemoveConfig(Config::Ptr cfg) {
-  Config::ScopedLock lock(*this);
-  for (auto it = configs_.begin(); it != configs_.end();) {
-    if (it->cfg == cfg) {
-      it = configs_.erase(it);
-    } else {
-      ++it;
-    }
-  }
-}
-
-bool LayeredConfig::GetRaw(const Slice &key, std::string *value) const {
-  for (const auto &conf : configs_) {
-    if (conf.cfg->GetRaw(key, value)) {
-      return true;
-    }
-  }
-  return false;
-}
-
-bool LayeredConfig::SetRaw(const Slice &key, const Slice &value) {
-  for (const auto &conf : configs_) {
-    if (conf.writeable && conf.cfg->SetRaw(key, value)) {
-      return true;
-    }
-  }
-  return false;
-}
-
-Config::Keys LayeredConfig::Enumerate(const Slice &key) const {
-  Config::Keys keys;
-  std::set<Slice> key_set;
-  for (const auto &conf : configs_) {
-    auto conf_keys = conf.cfg->Enumerate(key);
-    for (const auto &k : conf_keys) {
-      if (key_set.insert(k).second) {
-        keys.push_back(k);
-      }
-    }
-  }
-  return keys;
-}
-
-void LayeredConfig::RemoveRaw(const std::string &key) {
-  for (auto &conf : configs_) {
-    if (conf.writeable) {
-      conf.cfg->RemoveRaw(key);
-    }
-  }
-}
-
-int LayeredConfig::lowest() const {
-  if (configs_.empty()) {
-    return 0;
-  } else {
-    return configs_.front().priority - 1;
-  }
-}
-int LayeredConfig::highest() const {
-  if (configs_.empty()) {
-    return 0;
-  } else {
-    return configs_.back().priority + 1;
-  }
-}
-
-} // namespace util
-} // namespace tile

tile/base/config/layered_config.h

@@ -1,57 +0,0 @@
-#ifndef TILE_BASE_CONFIG_LAYERED_CONFIG_H
-#define TILE_BASE_CONFIG_LAYERED_CONFIG_H
-
-#pragma once
-
-#include "tile/base/config/config.h"
-#include <list>
-
-namespace tile {
-namespace util {
-class LayeredConfig : public Config {
-public:
-  using Ptr = RefPtr<LayeredConfig>;
-  LayeredConfig();
-  LayeredConfig(const LayeredConfig &) = delete;
-  LayeredConfig &operator=(const LayeredConfig &) = delete;
-
-  void Add(Config::Ptr cfg);
-  void Add(Config::Ptr cfg, int priority);
-  void Add(Config::Ptr cfg, const std::string &label);
-  void Add(Config::Ptr cfg, const std::string &label, int priority);
-  void Add(Config::Ptr cfg, const std::string &label, bool writeable);
-  void Add(Config::Ptr cfg, const std::string &label, int priority,
-           bool writeable);
-  void Add(Config::Ptr cfg, int priority, bool writeable);
-  void AddWriteable(Config::Ptr cfg, int priority);
-  Config::Ptr Find(const Slice &label) const;
-  void RemoveConfig(Config::Ptr cfg);
-
-protected:
-  struct ConfigItem {
-    Config::Ptr cfg;
-    // ... > -2 > -1 > 0 > 1 > 2 > 3 > 4 ...
-    int priority;
-    // can remove or set new?
-    bool writeable;
-    std::string label;
-  };
-
-  bool GetRaw(const Slice &key, std::string *value) const override;
-  bool SetRaw(const Slice &key, const Slice &value) override;
-  Config::Keys Enumerate(const Slice &key) const override;
-  void RemoveRaw(const std::string &key);
-
-  int lowest() const;
-  int highest() const;
-
-  ~LayeredConfig();
-
-private:
-  using ConfigList = std::list<ConfigItem>;
-  ConfigList configs_;
-};
-} // namespace util
-} // namespace tile
-
-#endif // TILE_BASE_CONFIG_LAYERED_CONFIG_H

tile/base/config/layered_configuration.cc

@@ -0,0 +1,149 @@
+#include "tile/base/config/layered_configuration.h"
+
+namespace tile {
+
+LayeredConfiguration::LayeredConfiguration() {}
+
+LayeredConfiguration::~LayeredConfiguration() {}
+
+void
+LayeredConfiguration::Add(Configuration::Ptr cfg)
+{
+    Add(cfg, highest(), false);
+}
+
+void
+LayeredConfiguration::Add(Configuration::Ptr cfg, int priority)
+{
+    Add(cfg, priority, false);
+}
+
+void
+LayeredConfiguration::Add(Configuration::Ptr cfg, const std::string &label)
+{
+    Add(cfg, label, highest(), false);
+}
+
+void
+LayeredConfiguration::Add(Configuration::Ptr cfg, const std::string &label, int priority)
+{
+    Add(cfg, label, priority, false);
+}
+
+void
+LayeredConfiguration::Add(Configuration::Ptr cfg, const std::string &label, bool writeable)
+{
+    Add(cfg, label, highest(), writeable);
+}
+
+void
+LayeredConfiguration::Add(Configuration::Ptr cfg, const std::string &label, int priority, bool writeable)
+{
+    Configuration::ScopedLock lock(*this);
+    ConfigItem item;
+    item.cfg       = cfg;
+    item.priority  = priority;
+    item.writeable = writeable;
+    item.label     = label;
+    auto it        = configs_.begin();
+    while (it != configs_.end() && it->priority < priority) { ++it; }
+    configs_.insert(it, item);
+}
+
+void
+LayeredConfiguration::Add(Configuration::Ptr cfg, int priority, bool writeable)
+{
+    Add(cfg, std::string(), priority, writeable);
+}
+
+void
+LayeredConfiguration::AddWriteable(Configuration::Ptr cfg, int priority)
+{
+    Add(cfg, priority, true);
+}
+
+Configuration::Ptr
+LayeredConfiguration::Find(const Slice &label) const
+{
+    Configuration::ScopedLock lock(*this);
+
+    for (const auto &conf : configs_) {
+        if (conf.label == label) { return conf.cfg; }
+    }
+    return 0;
+}
+
+void
+LayeredConfiguration::RemoveConfig(Configuration::Ptr cfg)
+{
+    Configuration::ScopedLock lock(*this);
+    for (auto it = configs_.begin(); it != configs_.end();) {
+        if (it->cfg == cfg) {
+            it = configs_.erase(it);
+        } else {
+            ++it;
+        }
+    }
+}
+
+bool
+LayeredConfiguration::GetRaw(const Slice &key, std::string *value) const
+{
+    for (const auto &conf : configs_) {
+        if (conf.cfg->GetRaw(key, value)) { return true; }
+    }
+    return false;
+}
+
+bool
+LayeredConfiguration::SetRaw(const Slice &key, const Slice &value)
+{
+    for (const auto &conf : configs_) {
+        if (conf.writeable && conf.cfg->SetRaw(key, value)) { return true; }
+    }
+    return false;
+}
+
+Configuration::Keys
+LayeredConfiguration::Enumerate(const Slice &key) const
+{
+    Configuration::Keys keys;
+    std::set<Slice> key_set;
+    for (const auto &conf : configs_) {
+        auto conf_keys = conf.cfg->Enumerate(key);
+        for (const auto &k : conf_keys) {
+            if (key_set.insert(k).second) { keys.push_back(k); }
+        }
+    }
+    return keys;
+}
+
+void
+LayeredConfiguration::RemoveRaw(const std::string &key)
+{
+    for (auto &conf : configs_) {
+        if (conf.writeable) { conf.cfg->RemoveRaw(key); }
+    }
+}
+
+int
+LayeredConfiguration::lowest() const
+{
+    if (configs_.empty()) {
+        return 0;
+    } else {
+        return configs_.front().priority - 1;
+    }
+}
+
+int
+LayeredConfiguration::highest() const
+{
+    if (configs_.empty()) {
+        return 0;
+    } else {
+        return configs_.back().priority + 1;
+    }
+}
+
+}// namespace tile

tile/base/config/layered_configuration.h

@@ -0,0 +1,54 @@
+#ifndef TILE_BASE_CONFIG_LAYERED_CONFIGURATION_H
+#define TILE_BASE_CONFIG_LAYERED_CONFIGURATION_H
+
+#pragma once
+
+#include "tile/base/config/configuration.h"
+#include <list>
+
+namespace tile {
+class LayeredConfiguration : public Configuration {
+public:
+    using Ptr = RefPtr<LayeredConfiguration>;
+    LayeredConfiguration();
+    LayeredConfiguration(const LayeredConfiguration &)            = delete;
+    LayeredConfiguration &operator=(const LayeredConfiguration &) = delete;
+
+    void Add(Configuration::Ptr cfg);
+    void Add(Configuration::Ptr cfg, int priority);
+    void Add(Configuration::Ptr cfg, const std::string &label);
+    void Add(Configuration::Ptr cfg, const std::string &label, int priority);
+    void Add(Configuration::Ptr cfg, const std::string &label, bool writeable);
+    void Add(Configuration::Ptr cfg, const std::string &label, int priority, bool writeable);
+    void Add(Configuration::Ptr cfg, int priority, bool writeable);
+    void AddWriteable(Configuration::Ptr cfg, int priority);
+    Configuration::Ptr Find(const Slice &label) const;
+    void RemoveConfig(Configuration::Ptr cfg);
+
+protected:
+    struct ConfigItem {
+        Configuration::Ptr cfg;
+        // ... > -2 > -1 > 0 > 1 > 2 > 3 > 4 ...
+        int priority;
+        // can remove or set new?
+        bool writeable;
+        std::string label;
+    };
+
+    bool GetRaw(const Slice &key, std::string *value) const override;
+    bool SetRaw(const Slice &key, const Slice &value) override;
+    Configuration::Keys Enumerate(const Slice &key) const override;
+    void RemoveRaw(const std::string &key);
+
+    int lowest() const;
+    int highest() const;
+
+    ~LayeredConfiguration();
+
+private:
+    using ConfigList = std::list<ConfigItem>;
+    ConfigList configs_;
+};
+}// namespace tile
+
+#endif// TILE_BASE_CONFIG_LAYERED_CONFIGURATION_H

tile/base/config/toml_configuration.cc

@@ -0,0 +1,219 @@
+#include "tile/base/config/toml_configuration.h"
+
+#include "tile/base/logging.h"
+#include "tile/base/string.h"
+#include "toml.hpp"
+
+namespace tile {
+class TomlConfiguration::Impl {
+public:
+    Impl() {}
+
+    ~Impl() = default;
+
+    bool load(std::istream &istr)
+    {
+        try {
+            value_ = toml::parse(istr);
+            return true;
+        } catch (...) {
+            return false;
+        }
+    }
+
+    bool load(const std::string &path)
+    {
+        try {
+            value_ = toml::parse(path);
+            return true;
+        } catch (...) {
+            return false;
+        }
+    }
+
+    toml::value *operator->() { return &value_; }
+
+    toml::value &operator*() { return value_; }
+
+private:
+    toml::value value_;
+};
+
+TomlConfiguration::TomlConfiguration() : impl_(new Impl) {}
+
+TomlConfiguration::~TomlConfiguration() {}
+
+bool
+TomlConfiguration::load(std::istream &istr)
+{
+    return impl_->load(istr);
+}
+
+bool
+TomlConfiguration::load(const std::string &path)
+{
+    return impl_->load(path);
+}
+
+void
+TomlConfiguration::SetInt(const Slice &key, int value)
+{
+    Configuration::SetInt(key, value);
+}
+
+void
+TomlConfiguration::SetBool(const Slice &key, bool value)
+{
+    Configuration::SetBool(key, value);
+}
+
+void
+TomlConfiguration::SetDouble(const Slice &key, double value)
+{
+    Configuration::SetDouble(key, value);
+}
+
+void
+TomlConfiguration::SetString(const Slice &key, const std::string &value)
+{
+    Configuration::SetString(key, value);
+}
+
+std::string
+TomlConfiguration::Dump() const
+{
+    try {
+        return toml::format(**impl_);
+    } catch (const std::exception &e) {
+        TILE_LOG_WARNING_EVERY_SECOND("{}", e.what());
+        return "";
+    }
+}
+
+bool
+TomlConfiguration::GetRaw(const Slice &key, std::string *value) const
+{
+    if (key.empty()) { return false; }
+    auto keys = Split(key, '.');
+
+    try {
+        auto cur = **impl_;
+        for (const auto &k : keys) {
+            auto next = toml::find(cur, k);
+            cur       = next;
+        }
+        std::stringstream ss;
+        if (cur.is_string()) {
+            ss << cur.as_string();
+        } else if (cur.is_integer()) {
+            ss << cur.as_integer();
+        } else if (cur.is_boolean()) {
+            ss << cur.as_boolean();
+        } else if (cur.is_floating()) {
+            ss << cur.as_floating();
+        } else if (cur.is_empty()) {
+            ss << "";
+        } else {
+            ss << toml::format(cur);
+        }
+        *value = ss.str();
+        return true;
+    } catch (const std::exception &e) {
+        TILE_LOG_WARNING_EVERY_SECOND("{}", e.what());
+        return false;
+    }
+}
+
+bool
+TomlConfiguration::SetRaw(const Slice &key, const Slice &value)
+{
+    if (key.empty()) { return false; }
+    auto keys = Split(key, '.');
+    try {
+        auto &root = **impl_;
+        for (size_t i = 0; i < keys.size() - 1; ++i) {
+            auto &next = toml::find(root, keys[i]);
+            root       = next;
+        }
+        root[keys.back()] = value.ToString();
+        return true;
+    } catch (const std::exception &e) {
+        TILE_LOG_WARNING_EVERY_SECOND("{}", e.what());
+        return false;
+    }
+}
+
+void
+TomlConfiguration::RemoveRaw(const Slice &key)
+{
+    if (key.empty()) { return; }
+    auto keys = Split(key, '.');
+    while (!keys.empty() && keys.back() == "") { keys.pop_back(); }
+    try {
+        if (keys.empty()) {
+            auto &root = **impl_;
+            root       = toml::table();
+            return;
+        }
+
+        auto root = **impl_;
+        for (size_t i = 0; i + 1 < keys.size(); ++i) {
+            if (!root.contains(keys[i])) { return; }
+            root = root.at(keys[i]);
+        }
+
+        if (!root.contains(keys.back())) { return; }
+        auto last_root = root.at(key.back());
+
+        // remove the last key
+        toml::value new_node = toml::table();
+        for (const auto &p : last_root.as_table()) {
+            if (p.first != keys.back()) { new_node[p.first] = p.second; }
+        }
+        last_root = new_node;
+    } catch (...) {}
+}
+
+Configuration::Keys
+TomlConfiguration::Enumerate(const Slice &range) const
+{
+    Configuration::Keys keys;
+    auto split_keys    = Split(range, '.');
+    auto last_key      = split_keys.empty() ? "" : split_keys.back();
+    std::string prefix = range;
+    if (!prefix.empty() && prefix.back() != '.') { prefix += "."; }
+
+    auto root = **impl_;
+    try {
+        // if (!root.is_empty()) {
+        for (int i = 0; i < split_keys.size(); ++i) {
+            auto next = toml::find(root, split_keys[i]);
+            root      = next;
+        }
+        // }
+
+        // if (root.is_empty()) { return keys; }
+
+        // for (const auto &k : keys_) {
+        //     auto next = toml::find(root, k);
+        //     root      = next;
+        // }
+
+        auto visitor = [&](const toml::value &node) {
+            if (node.is_table()) {
+                for (const auto &p : node.as_table()) {
+                    /*if (EndsWith(p.first, prefix)) */ {
+                        keys.push_back(prefix + p.first);
+                    }
+                }
+            }
+        };
+        toml::visit(visitor, root);
+        // TILE_LOG_INFO("{}", toml::format(root));
+    } catch (const std::exception &e) {
+        TILE_LOG_WARNING_EVERY_SECOND("{}\n{}\n", e.what(), Dump());
+    }
+    return keys;
+}
+
+}// namespace tile

tile/base/config/toml_configuration.h

@@ -0,0 +1,40 @@
+#ifndef TILE_BASE_CONFIG_TOML_CONFIGURATION_H
+#define TILE_BASE_CONFIG_TOML_CONFIGURATION_H
+
+#pragma once
+
+#include "tile/base/config/configuration.h"
+#include <map>
+
+namespace tile {
+class TomlConfiguration : public Configuration {
+public:
+    using Ptr = RefPtr<TomlConfiguration>;
+
+    TomlConfiguration();
+    ~TomlConfiguration() override;
+
+    bool load(std::istream &istr);
+    bool load(const std::string &path);
+
+    void SetInt(const Slice &key, int value) override;
+    void SetBool(const Slice &key, bool value) override;
+    void SetDouble(const Slice &key, double value) override;
+    void SetString(const Slice &key, const std::string &value) override;
+
+    void RemoveRaw(const Slice &key) override;
+    std::string Dump() const;
+
+protected:
+    bool GetRaw(const Slice &key, std::string *value) const override;
+    bool SetRaw(const Slice &key, const Slice &value) override;
+    Keys Enumerate(const Slice &range) const override;
+
+private:
+    class Impl;
+
+    std::unique_ptr<Impl> impl_;
+};
+}// namespace tile
+
+#endif// TILE_BASE_CONFIG_TOML_CONFIGURATION_H

tile/base/config/toml_configuration_test.cc

@@ -0,0 +1,71 @@
+#include "tile/base/config/toml_configuration.h"
+
+#include "gmock/gmock-matchers.h"
+#include "gtest/gtest.h"
+
+namespace tile {
+namespace {
+const char *kTomlConfig = R"(
+key1=1
+key2=2
+key3=1.9
+key4=true
+
+[key5]
+key51="value51"
+key52=52
+)";
+}
+
+TEST(TomlConfiguration, Load)
+{
+    TomlConfiguration config;
+    std::istringstream istr(kTomlConfig);
+    ASSERT_TRUE(config.load(istr));
+}
+
+TEST(TomlConfiguration, Has)
+{
+    TomlConfiguration config;
+    std::istringstream istr(kTomlConfig);
+    ASSERT_TRUE(config.load(istr));
+    ASSERT_TRUE(config.Has("key1"));
+    ASSERT_TRUE(config.Has("key2"));
+    ASSERT_TRUE(config.Has("key3"));
+    ASSERT_TRUE(config.Has("key4"));
+    ASSERT_TRUE(config.Has("key5"));
+    ASSERT_TRUE(config.Has("key5.key51"));
+    ASSERT_TRUE(config.Has("key5.key52"));
+}
+
+TEST(TomlConfiguration, SampleSet)
+{
+    TomlConfiguration config;
+    std::istringstream istr(kTomlConfig);
+    ASSERT_TRUE(config.load(istr));
+    ASSERT_TRUE(config.GetInt32("key2"));
+    ASSERT_EQ(*config.GetInt32("key2"), 2);
+
+    config.SetInt("key2", 20);
+}
+
+TEST(TomlConfiguration, Enumerate)
+{
+    TomlConfiguration config;
+    std::istringstream istr(kTomlConfig);
+    ASSERT_TRUE(config.load(istr));
+    auto keys = config.keys("");
+    ASSERT_EQ(5, keys.size());
+    ASSERT_THAT(keys, ::testing::UnorderedElementsAre("key1", "key2", "key3", "key4", "key5"));
+
+    keys = config.keys("key5");
+    // for (const auto &key : keys) { TILE_LOG_INFO("key5: {}", key); }
+    ASSERT_EQ(2, keys.size());
+    ASSERT_THAT(keys, ::testing::UnorderedElementsAre("key5.key51", "key5.key52"));
+
+    config.Remove("key5.key51");
+    keys = config.keys("key5");
+    ASSERT_EQ("key5.key52", keys[0]);
+}
+
+}// namespace tile

tile/base/configuration.h

@@ -0,0 +1,12 @@
+#ifndef TILE_BASE_CONFIGURATION_H
+#define TILE_BASE_CONFIGURATION_H
+
+#pragma once
+
+#include "tile/base/config/configurable.h"
+#include "tile/base/config/configuration.h"
+#include "tile/base/config/ini_file_configuration.h"
+#include "tile/base/config/layered_configuration.h"
+#include "tile/base/config/toml_configuration.h"
+
+#endif// TILE_BASE_CONFIGURATION_H

tile/base/data.h

@@ -4,4 +4,4 @@
 #pragma once
 #include "tile/base/data/json.h"
 
-#endif // TILE_BASE_DATA_H
+#endif// TILE_BASE_DATA_H

tile/base/data/json.h

@@ -11,28 +11,34 @@
 
 namespace tile {
 
-template <typename T>
-auto ToJson(const T &value)
-    -> enable_if_t<std::is_unsigned<T>::value, Json::Value> {
-  return static_cast<std::uint64_t>(value);
+template<typename T>
+auto
+ToJson(const T &value) -> enable_if_t<std::is_unsigned<T>::value, Json::Value>
+{
+    return static_cast<std::uint64_t>(value);
 }
 
-template <typename T>
-auto ToJson(const T &value)
-    -> enable_if_t<std::is_signed<T>::value, Json::Value> {
-  return static_cast<std::int64_t>(value);
-}
-template <typename T>
-auto ToJson(const T &value)
-    -> enable_if_t<!std::is_signed<T>::value && !std::is_unsigned<T>::value,
-                   Json::Value> {
-  return Format("{}", value);
+template<typename T>
+auto
+ToJson(const T &value) -> enable_if_t<std::is_signed<T>::value, Json::Value>
+{
+    return static_cast<std::int64_t>(value);
 }
 
-template <typename T> Json::Value ToJson(const std::atomic<T> &v) {
-  return ToJson(v.load(std::memory_order_relaxed));
+template<typename T>
+auto
+ToJson(const T &value) -> enable_if_t<!std::is_signed<T>::value && !std::is_unsigned<T>::value, Json::Value>
+{
+    return Format("{}", value);
 }
 
-} // namespace tile
+template<typename T>
+Json::Value
+ToJson(const std::atomic<T> &v)
+{
+    return ToJson(v.load(std::memory_order_relaxed));
+}
 
-#endif // TILE_BASE_DATA_JSON_H
+}// namespace tile
+
+#endif// TILE_BASE_DATA_JSON_H

tile/base/deferred.h

@@ -9,56 +9,57 @@ namespace tile {
 
 class ScopedDeferred {
 public:
-  template <typename F>
-  explicit ScopedDeferred(F &&f) : action_(std::move(f)) {}
+    template<typename F>
+    explicit ScopedDeferred(F &&f) : action_(std::move(f))
+    {}
 
-  ~ScopedDeferred() { action_(); }
-  ScopedDeferred(const ScopedDeferred &) = delete;
-  ScopedDeferred &operator=(const ScopedDeferred &) = delete;
+    ~ScopedDeferred() { action_(); }
+
+    ScopedDeferred(const ScopedDeferred &)            = delete;
+    ScopedDeferred &operator=(const ScopedDeferred &) = delete;
 
 private:
-  std::function<void()> action_;
+    std::function<void()> action_;
 };
 
 class Deferred {
 public:
-  Deferred() = default;
-  template <typename F>
-  explicit Deferred(F &&f) : action_(std::forward<F>(f)) {}
+    Deferred() = default;
 
-  Deferred(Deferred &&other) noexcept : action_(std::move(other.action_)) {
-    other.action_ = nullptr;
-  }
-  Deferred &operator=(Deferred &&other) noexcept {
-    if (&other == this) {
-      return *this;
+    template<typename F>
+    explicit Deferred(F &&f) : action_(std::forward<F>(f))
+    {}
+
+    Deferred(Deferred &&other) noexcept : action_(std::move(other.action_)) { other.action_ = nullptr; }
+
+    Deferred &operator=(Deferred &&other) noexcept
+    {
+        if (&other == this) { return *this; }
+
+        Fire();
+        action_       = std::move(other.action_);
+        other.action_ = nullptr;
+        return *this;
     }
 
-    Fire();
-    action_ = std::move(other.action_);
-    other.action_ = nullptr;
-    return *this;
-  }
-  ~Deferred() {
-    if (action_) {
-      action_();
+    ~Deferred()
+    {
+        if (action_) { action_(); }
     }
-  }
 
-  explicit operator bool() const noexcept { return !!action_; }
+    explicit operator bool() const noexcept { return !!action_; }
 
-  void Fire() noexcept {
-    if (auto op = std::move(action_)) {
-      op();
+    void Fire() noexcept
+    {
+        if (auto op = std::move(action_)) { op(); }
     }
-  }
 
-  void Dimiss() noexcept { action_ = nullptr; }
+    void Dimiss() noexcept { action_ = nullptr; }
 
 private:
-  std::function<void()> action_;
+    std::function<void()> action_;
 };
 
-} // namespace tile
+}// namespace tile
 
-#endif // _TILE_BASE_DEFERED_H
+#endif// _TILE_BASE_DEFERED_H

tile/base/deferred_test.cc

@@ -2,49 +2,51 @@
 #include "gtest/gtest.h"
 
 namespace tile {
-TEST(ScopedDefered, All) {
-  bool f = false;
-  {
-    ScopedDeferred scoped_defered([&] { f = true; });
-    ASSERT_FALSE(f);
-  }
-  ASSERT_TRUE(f);
+TEST(ScopedDefered, All)
+{
+    bool f = false;
+    {
+        ScopedDeferred scoped_defered([&] { f = true; });
+        ASSERT_FALSE(f);
+    }
+    ASSERT_TRUE(f);
 }
 
-TEST(Defered, All) {
-  bool f1 = false;
-  bool f2 = false;
-  {
-    Deferred defer([&] { f1 = true; });
-    ASSERT_FALSE(f1);
-    Deferred defer2([&] { f2 = true; });
-    defer2.Dimiss();
+TEST(Defered, All)
+{
+    bool f1 = false;
+    bool f2 = false;
+    {
+        Deferred defer([&] { f1 = true; });
+        ASSERT_FALSE(f1);
+        Deferred defer2([&] { f2 = true; });
+        defer2.Dimiss();
+        ASSERT_FALSE(f2);
+    }
+    ASSERT_TRUE(f1);
     ASSERT_FALSE(f2);
-  }
-  ASSERT_TRUE(f1);
-  ASSERT_FALSE(f2);
 
-  bool f3 = false;
-  Deferred defer3([&] { f3 = true; });
-  ASSERT_FALSE(f3);
-  defer3.Fire();
-  ASSERT_TRUE(f3);
+    bool f3 = false;
+    Deferred defer3([&] { f3 = true; });
+    ASSERT_FALSE(f3);
+    defer3.Fire();
+    ASSERT_TRUE(f3);
 
-  bool f4 = false;
-  Deferred defer5;
-  {
-    Deferred defer4([&] { f4 = true; });
+    bool f4 = false;
+    Deferred defer5;
+    {
+        Deferred defer4([&] { f4 = true; });
+        ASSERT_FALSE(f4);
+        defer5 = std::move(defer4);
+    }
     ASSERT_FALSE(f4);
-    defer5 = std::move(defer4);
-  }
-  ASSERT_FALSE(f4);
-  auto defer6 = std::move(defer5);
-  defer5.Fire();
-  ASSERT_FALSE(defer5);
-  defer6.Fire();
-  ASSERT_TRUE(f4);
+    auto defer6 = std::move(defer5);
+    defer5.Fire();
+    ASSERT_FALSE(defer5);
+    defer6.Fire();
+    ASSERT_TRUE(f4);
 
-  Deferred().Fire();
-  Deferred().Dimiss();
+    Deferred().Fire();
+    Deferred().Dimiss();
 }
-} // namespace tile
+}// namespace tile

tile/base/demangle.cc

@@ -10,21 +10,21 @@
 
 namespace tile {
 
-std::string Demangle(const char *s) {
+std::string
+Demangle(const char *s)
+{
 #ifdef _MSC_VER
-  return s;
-#elif defined(__GNUC__) || defined(__clang__)
-  int status;
-  char *demangled = abi::__cxa_demangle(s, nullptr, nullptr, &status);
-  ScopedDeferred _([&] { free(demangled); });
-  if (!demangled) {
     return s;
-  }
-  return demangled;
+#elif defined(__GNUC__) || defined(__clang__)
+    int status;
+    char *demangled = abi::__cxa_demangle(s, nullptr, nullptr, &status);
+    ScopedDeferred _([&] { free(demangled); });
+    if (!demangled) { return s; }
+    return demangled;
 #else
 #error "Demangle not supported on current compiler."
 
 #endif
 }
 
-} // namespace tile
+}// namespace tile

tile/base/demangle.h

@@ -11,8 +11,11 @@ namespace tile {
 
 std::string Demangle(const char *s);
 
-template <class T> std::string GetTypeName() {
-  return Demangle(typeid(T).name());
+template<class T>
+std::string
+GetTypeName()
+{
+    return Demangle(typeid(T).name());
 }
 
 #if __GNUC__ >= 12
@@ -20,14 +23,17 @@ template <class T> std::string GetTypeName() {
 #pragma GCC diagnostic ignored "-Wnonnull-compare"
 #endif
 
-template <class T> std::string GetTypeName(T &&o) {
-  return Demangle(typeid(std::forward<T>(o)).name());
+template<class T>
+std::string
+GetTypeName(T &&o)
+{
+    return Demangle(typeid(std::forward<T>(o)).name());
 }
 
 #if __GNUC__ >= 12
 #pragma GCC diagnostic pop
 #endif
 
-} // namespace tile
+}// namespace tile
 
-#endif // _TILE_BASE_DEMANGLE_H
+#endif// _TILE_BASE_DEMANGLE_H

tile/base/demangle_test.cc

@@ -3,16 +3,16 @@
 
 namespace tile {
 struct C {
-  struct D {
-    struct E {};
-  };
+    struct D {
+        struct E {};
+    };
 };
 
-TEST(Demangle, All) {
-  ASSERT_EQ("tile::C::D::E", GetTypeName<C::D::E>());
-  ASSERT_NE(GetTypeName<C::D>(), typeid(C::D::E).name());
-  ASSERT_EQ("invalid function name !@#$",
-            Demangle("invalid function name !@#$"));
+TEST(Demangle, All)
+{
+    ASSERT_EQ("tile::C::D::E", GetTypeName<C::D::E>());
+    ASSERT_NE(GetTypeName<C::D>(), typeid(C::D::E).name());
+    ASSERT_EQ("invalid function name !@#$", Demangle("invalid function name !@#$"));
 }
 
-} // namespace tile
+}// namespace tile

tile/base/dependency_registry.h

@@ -21,186 +21,174 @@
 #include <utility>
 
 // class dependency
-#define TILE_DECLARE_CLASS_DEPENDENCY_REGISTRY(Registry, Interface, ...)       \
-  extern ::tile::detail::dependency_registry::ClassRegistry<                   \
-      struct Registry, Interface, ##__VA_ARGS__> &Registry
+#define TILE_DECLARE_CLASS_DEPENDENCY_REGISTRY(Registry, Interface, ...)                                               \
+    extern ::tile::detail::dependency_registry::ClassRegistry<struct Registry, Interface, ##__VA_ARGS__> &Registry
 
-#define TILE_DEFINE_CLASS_DEPENDENCY_REGISTRY(Registry, Interface, ...)        \
-  ::tile::detail::dependency_registry::ClassRegistry<                          \
-      struct Registry, Interface, ##__VA_ARGS__> &Registry =                   \
-      **::tile::internal::LazyInit<::tile::NeverDestroyed<                     \
-          ::tile::detail::dependency_registry::ClassRegistry<                  \
-              struct Registry, Interface, ##__VA_ARGS__>>>()
+#define TILE_DEFINE_CLASS_DEPENDENCY_REGISTRY(Registry, Interface, ...)                                                \
+    ::tile::detail::dependency_registry::ClassRegistry<struct Registry, Interface, ##__VA_ARGS__> &Registry =          \
+        **::tile::internal::LazyInit<::tile::NeverDestroyed<                                                           \
+            ::tile::detail::dependency_registry::ClassRegistry<struct Registry, Interface, ##__VA_ARGS__>>>()
 
-#define TILE_REGISTER_CLASS_DEPENDENCY(Registry, ImplementationName,           \
-                                       ImplementationClassName, ...)           \
-  TILE_REGISTER_CLASS_DEPENDENCY_FACTORY(                                      \
-      Registry, ImplementationName,                                            \
-      TILE_REGISTER_CLASS_DEPENDENCY_FUNCTION_AUX_INVOKE(                      \
-          ImplementationClassName, ##__VA_ARGS__))
+#define TILE_REGISTER_CLASS_DEPENDENCY(Registry, ImplementationName, ImplementationClassName, ...)                     \
+    TILE_REGISTER_CLASS_DEPENDENCY_FACTORY(                                                                            \
+        Registry, ImplementationName,                                                                                  \
+        TILE_REGISTER_CLASS_DEPENDENCY_FUNCTION_AUX_INVOKE(ImplementationClassName, ##__VA_ARGS__))
 
-#define TILE_REGISTER_CLASS_DEPENDENCY_FACTORY(Registry, Name, Factory)        \
-  __attribute__((constructor)) static void TILE_INTERNAL_PP_CAT(               \
-      tile_reserved_registry_dependency_class_register_, __COUNTER__)() {      \
-    auto registry = ::tile::internal::LazyInit<::tile::NeverDestroyed<         \
-        typename std::decay<decltype(Registry)>::type>>()                      \
-                        ->Get();                                               \
-    ::tile::detail::dependency_registry::AddToRegistry(registry, Name,         \
-                                                       Factory);               \
-  }
+#define TILE_REGISTER_CLASS_DEPENDENCY_FACTORY(Registry, Name, Factory)                                                \
+    __attribute__((constructor)) static void TILE_INTERNAL_PP_CAT(                                                     \
+        tile_reserved_registry_dependency_class_register_, __COUNTER__)()                                              \
+    {                                                                                                                  \
+        auto registry =                                                                                                \
+            ::tile::internal::LazyInit<::tile::NeverDestroyed<typename std::decay<decltype(Registry)>::type>>()        \
+                ->Get();                                                                                               \
+        ::tile::detail::dependency_registry::AddToRegistry(registry, Name, Factory);                                   \
+    }
 
 // object dependency
-#define TILE_DECLARE_OBJECT_DEPENDENCY_REGISTRY(Registry, Interface)           \
-  extern ::tile::detail::dependency_registry::ObjectRegistry<                  \
-      struct Registry, Interface> &Registry
+#define TILE_DECLARE_OBJECT_DEPENDENCY_REGISTRY(Registry, Interface)                                                   \
+    extern ::tile::detail::dependency_registry::ObjectRegistry<struct Registry, Interface> &Registry
 
-#define TILE_DEFINE_OBJECT_DEPENDENCY_REGISTRY(Registry, Interface)            \
-  ::tile::detail::dependency_registry::ObjectRegistry<struct Registry,         \
-                                                      Interface> &Registry =   \
-      **::tile::internal::LazyInit<::tile::NeverDestroyed<                     \
-          ::tile::detail::dependency_registry::ObjectRegistry<struct Registry, \
-                                                              Interface>>>()
+#define TILE_DEFINE_OBJECT_DEPENDENCY_REGISTRY(Registry, Interface)                                                    \
+    ::tile::detail::dependency_registry::ObjectRegistry<struct Registry, Interface> &Registry =                        \
+        **::tile::internal::LazyInit<                                                                                  \
+            ::tile::NeverDestroyed<::tile::detail::dependency_registry::ObjectRegistry<struct Registry, Interface>>>()
 
-#define TILE_REGISTER_OBJECT_DEPENDENCY(Registry, ObjectName,                  \
-                                        PointerOrFactory)                      \
-  __attribute__((constructor)) static void TILE_INTERNAL_PP_CAT(               \
-      tile_reserved_registry_dependency_object_register_, __COUNTER__)() {     \
-    auto registry = ::tile::internal::LazyInit<::tile::NeverDestroyed<         \
-        typename std::decay<decltype(Registry)>::type>>()                      \
-                        ->Get();                                               \
-    ::tile::detail::dependency_registry::AddToRegistry(registry, ObjectName,   \
-                                                       PointerOrFactory);      \
-  }
+#define TILE_REGISTER_OBJECT_DEPENDENCY(Registry, ObjectName, PointerOrFactory)                                        \
+    __attribute__((constructor)) static void TILE_INTERNAL_PP_CAT(                                                     \
+        tile_reserved_registry_dependency_object_register_, __COUNTER__)()                                             \
+    {                                                                                                                  \
+        auto registry =                                                                                                \
+            ::tile::internal::LazyInit<::tile::NeverDestroyed<typename std::decay<decltype(Registry)>::type>>()        \
+                ->Get();                                                                                               \
+        ::tile::detail::dependency_registry::AddToRegistry(registry, ObjectName, PointerOrFactory);                    \
+    }
 
 namespace tile {
 namespace detail {
 namespace dependency_registry {
 
-#define TILE_REGISTER_CLASS_DEPENDENCY_FUNCTION_AUX_INVOKE(Interface, ...)     \
-  ::tile::detail::dependency_registry::FactoryAux<Interface, ##__VA_ARGS__>
-template <typename Interface, typename... Args>
-std::unique_ptr<Interface> FactoryAux(Args &&...args) {
-  return make_unique<Interface>(std::forward<Args>(args)...);
+#define TILE_REGISTER_CLASS_DEPENDENCY_FUNCTION_AUX_INVOKE(Interface, ...)                                             \
+    ::tile::detail::dependency_registry::FactoryAux<Interface, ##__VA_ARGS__>
+
+template<typename Interface, typename... Args>
+std::unique_ptr<Interface>
+FactoryAux(Args &&...args)
+{
+    return make_unique<Interface>(std::forward<Args>(args)...);
 }
 
-template <typename T, typename... Args>
-void AddToRegistry(T *registry, Args &&...args) {
-  registry->Register(std::forward<Args>(args)...);
+template<typename T, typename... Args>
+void
+AddToRegistry(T *registry, Args &&...args)
+{
+    registry->Register(std::forward<Args>(args)...);
 }
 
-template <typename Tag, typename Interface, typename... FactoryArgs>
+template<typename Tag, typename Interface, typename... FactoryArgs>
 class ClassRegistry {
-  using Factory = std::function<std::unique_ptr<Interface>(FactoryArgs...)>;
+    using Factory = std::function<std::unique_ptr<Interface>(FactoryArgs...)>;
 
 public:
-  Factory TryGetFactory(Slice name) const noexcept {
-    auto iter = factories_.find(name.ToString());
-    if (iter == factories_.end()) {
-      return nullptr;
+    Factory TryGetFactory(Slice name) const noexcept
+    {
+        auto iter = factories_.find(name.ToString());
+        if (iter == factories_.end()) { return nullptr; }
+
+        auto constructor_ptr = iter->second.get();
+        return
+            [constructor_ptr](FactoryArgs... args) { return (*constructor_ptr)(std::forward<FactoryArgs>(args)...); };
     }
 
-    auto constructor_ptr = iter->second.get();
-    return [constructor_ptr](FactoryArgs... args) {
-      return (*constructor_ptr)(std::forward<FactoryArgs>(args)...);
+    Factory GetFactory(const std::string &name) const noexcept
+    {
+        auto result = TryGetFactory(name);
+        TILE_CHECK(result, "Class [{}] implement interface [{}] is not found.", name, GetTypeName<Interface>());
+
+        return result;
+    }
+
+    std::unique_ptr<Interface> TryNew(Slice name, FactoryArgs... args) const
+    {
+        auto iter = factories_.find(name.ToString());
+        if (iter == factories_.end()) { return nullptr; }
+
+        auto &constructor = iter->second;
+        return (*constructor)(std::forward<FactoryArgs>(args)...);
+    }
+
+    std::unique_ptr<Interface> New(const std::string &name, FactoryArgs... args) const
+    {
+        auto result = TryNew(name, std::forward<FactoryArgs>(args)...);
+        TILE_CHECK(result, "Class [{}] implement interface [{}] is not found.", name, GetTypeName<Interface>());
+        return result;
+    }
+
+private:
+    template<typename T, typename... Args>
+    friend void AddToRegistry(T *registry, Args &&...args);
+
+    void Register(const std::string &name, Factory factory)
+    {
+        TILE_CHECK(factories_.find(name) == factories_.end(), "Duplicate class dependency: ");
+        factories_[name] = make_unique<Factory>(std::move(factory));
+    }
+
+private:
+    std::unordered_map<std::string, std::unique_ptr<Factory>> factories_;
+};
+
+template<typename Tag, typename Interface>
+class ObjectRegistry {
+public:
+    Interface *TryGet(Slice name) const
+    {
+        auto iter = objects_.find(name.ToString());
+        if (iter == objects_.end()) { return nullptr; }
+        auto &&e = *iter->second;
+        std::call_once(e.flag, [&] { e.object = e.initializer(); });
+        return e.object.Get();
+    }
+
+    Interface *Get(Slice name) const
+    {
+        auto result = TryGet(name);
+        TILE_CHECK(result, "Object dependency [{}] implementing interface [{}] is not found", name,
+                   GetTypeName<Interface>());
+        return result;
+    }
+
+private:
+    template<typename T, typename... Args>
+    friend void AddToRegistry(T *registry, Args &&...args);
+
+    void Register(const std::string &name, Interface *object)
+    {
+        TILE_DCHECK(objects_.find(name) == objects_.end());
+        auto &&e = objects_[name];
+        e        = make_unique<LazilyInstantiatedObject>();
+        std::call_once(e->flag, [&] { e->object = MaybeOwning<Interface>(non_owning, object); });
+    }
+
+    void Register(const std::string &name, std::function<MaybeOwning<Interface>()> initializer)
+    {
+        TILE_CHECK(objects_.find(name) == objects_.end(), "Double registration of object dependency [{}]", name);
+
+        objects_[name]              = make_unique<LazilyInstantiatedObject>();
+        objects_[name]->initializer = std::move(initializer);
+    }
+
+private:
+    struct LazilyInstantiatedObject {
+        std::once_flag flag;
+        MaybeOwning<Interface> object;
+        std::function<MaybeOwning<Interface>()> initializer;
     };
-  }
 
-  Factory GetFactory(const std::string &name) const noexcept {
-    auto result = TryGetFactory(name);
-    TILE_CHECK(result, "Class [{}] implement interface [{}] is not found.",
-               name, GetTypeName<Interface>());
-
-    return result;
-  }
-
-  std::unique_ptr<Interface> TryNew(Slice name, FactoryArgs... args) const {
-    auto iter = factories_.find(name.ToString());
-    if (iter == factories_.end()) {
-      return nullptr;
-    }
-
-    auto &constructor = iter->second;
-    return (*constructor)(std::forward<FactoryArgs>(args)...);
-  }
-
-  std::unique_ptr<Interface> New(const std::string &name,
-                                 FactoryArgs... args) const {
-    auto result = TryNew(name, std::forward<FactoryArgs>(args)...);
-    TILE_CHECK(result, "Class [{}] implement interface [{}] is not found.",
-               name, GetTypeName<Interface>());
-    return result;
-  }
-
-private:
-  template <typename T, typename... Args>
-  friend void AddToRegistry(T *registry, Args &&...args);
-
-  void Register(const std::string &name, Factory factory) {
-    TILE_CHECK(factories_.find(name) == factories_.end(),
-               "Duplicate class dependency: ");
-    factories_[name] = make_unique<Factory>(std::move(factory));
-  }
-
-private:
-  std::unordered_map<std::string, std::unique_ptr<Factory>> factories_;
+    std::unordered_map<std::string, std::unique_ptr<LazilyInstantiatedObject>> objects_;
 };
 
-template <typename Tag, typename Interface> class ObjectRegistry {
-public:
-  Interface *TryGet(Slice name) const {
-    auto iter = objects_.find(name.ToString());
-    if (iter == objects_.end()) {
-      return nullptr;
-    }
-    auto &&e = *iter->second;
-    std::call_once(e.flag, [&] { e.object = e.initializer(); });
-    return e.object.Get();
-  }
+}// namespace dependency_registry
+}// namespace detail
+}// namespace tile
 
-  Interface *Get(Slice name) const {
-    auto result = TryGet(name);
-    TILE_CHECK(
-        result,
-        "Object dependency [{}] implementing interface [{}] is not found", name,
-        GetTypeName<Interface>());
-    return result;
-  }
-
-private:
-  template <typename T, typename... Args>
-  friend void AddToRegistry(T *registry, Args &&...args);
-
-  void Register(const std::string &name, Interface *object) {
-    TILE_DCHECK(objects_.find(name) == objects_.end());
-    auto &&e = objects_[name];
-    e = make_unique<LazilyInstantiatedObject>();
-    std::call_once(e->flag, [&] {
-      e->object = MaybeOwning<Interface>(non_owning, object);
-    });
-  }
-
-  void Register(const std::string &name,
-                std::function<MaybeOwning<Interface>()> initializer) {
-    TILE_CHECK(objects_.find(name) == objects_.end(),
-               "Double registration of object dependency [{}]", name);
-
-    objects_[name] = make_unique<LazilyInstantiatedObject>();
-    objects_[name]->initializer = std::move(initializer);
-  }
-
-private:
-  struct LazilyInstantiatedObject {
-    std::once_flag flag;
-    MaybeOwning<Interface> object;
-    std::function<MaybeOwning<Interface>()> initializer;
-  };
-
-  std::unordered_map<std::string, std::unique_ptr<LazilyInstantiatedObject>>
-      objects_;
-};
-
-} // namespace dependency_registry
-} // namespace detail
-} // namespace tile
-
-#endif // TILE_BASE_DEPENDENCY_REGISTRY_H
+#endif// TILE_BASE_DEPENDENCY_REGISTRY_H

tile/base/dependency_registry_test.cc

@@ -1,77 +1,84 @@
 #include "tile/base/dependency_registry.h"
 #include "gtest/gtest.h"
+
 namespace tile {
 struct Destroyer {
-  virtual ~Destroyer() = default;
+    virtual ~Destroyer() = default;
 };
 
 struct FastDestroyer : Destroyer {
-  FastDestroyer() { ++instances; }
-  ~FastDestroyer() override { --instances; }
-  static int instances;
+    FastDestroyer() { ++instances; }
+
+    ~FastDestroyer() override { --instances; }
+
+    static int instances;
 };
+
 int FastDestroyer::instances = 0;
 
 struct GentleDestroyer : Destroyer {
-  GentleDestroyer() { ++instances; }
-  ~GentleDestroyer() override { --instances; }
-  static int instances;
+    GentleDestroyer() { ++instances; }
+
+    ~GentleDestroyer() override { --instances; }
+
+    static int instances;
 };
+
 int GentleDestroyer::instances = 0;
 
 struct SpeedDestroyer : Destroyer {
-  explicit SpeedDestroyer(int) {}
+    explicit SpeedDestroyer(int) {}
 };
+
 struct SpeedDestroyer2 : Destroyer {};
 
 TILE_DECLARE_CLASS_DEPENDENCY_REGISTRY(world_destroyer, Destroyer);
 TILE_DEFINE_CLASS_DEPENDENCY_REGISTRY(world_destroyer, Destroyer);
-TILE_REGISTER_CLASS_DEPENDENCY(world_destroyer, "fast-destroyer",
-                               FastDestroyer);
+TILE_REGISTER_CLASS_DEPENDENCY(world_destroyer, "fast-destroyer", FastDestroyer);
 TILE_REGISTER_CLASS_DEPENDENCY_FACTORY(world_destroyer, "gentle-destroyer", [] {
-  return make_unique<GentleDestroyer>();
+    return make_unique<GentleDestroyer>();
 });
 GentleDestroyer global_gentle_destroyer;
 
 TILE_DECLARE_CLASS_DEPENDENCY_REGISTRY(with_arg_destroyer, Destroyer, int);
 TILE_DEFINE_CLASS_DEPENDENCY_REGISTRY(with_arg_destroyer, Destroyer, int);
-TILE_REGISTER_CLASS_DEPENDENCY(with_arg_destroyer, "speed-destroyer",
-                               SpeedDestroyer, int);
-TILE_REGISTER_CLASS_DEPENDENCY_FACTORY(with_arg_destroyer, "speed-destroyer-2",
-                                       [](int speed) {
-                                         return make_unique<SpeedDestroyer2>();
-                                       });
+TILE_REGISTER_CLASS_DEPENDENCY(with_arg_destroyer, "speed-destroyer", SpeedDestroyer, int);
+TILE_REGISTER_CLASS_DEPENDENCY_FACTORY(with_arg_destroyer, "speed-destroyer-2", [](int speed) {
+    return make_unique<SpeedDestroyer2>();
+});
 
-TEST(DependencyRegistry, Class) {
-  EXPECT_TRUE(world_destroyer.TryGetFactory("gentle-destroyer"));
-  EXPECT_TRUE(world_destroyer.TryGetFactory("fast-destroyer"));
-  EXPECT_FALSE(world_destroyer.TryGetFactory("404-destroyer"));
-  EXPECT_TRUE(world_destroyer.TryNew("gentle-destroyer"));
-  EXPECT_TRUE(world_destroyer.TryNew("fast-destroyer"));
-  EXPECT_FALSE(world_destroyer.TryGetFactory("404-destroyer"));
+TEST(DependencyRegistry, Class)
+{
+    EXPECT_TRUE(world_destroyer.TryGetFactory("gentle-destroyer"));
+    EXPECT_TRUE(world_destroyer.TryGetFactory("fast-destroyer"));
+    EXPECT_FALSE(world_destroyer.TryGetFactory("404-destroyer"));
+    EXPECT_TRUE(world_destroyer.TryNew("gentle-destroyer"));
+    EXPECT_TRUE(world_destroyer.TryNew("fast-destroyer"));
+    EXPECT_FALSE(world_destroyer.TryGetFactory("404-destroyer"));
 
-  EXPECT_EQ(1, GentleDestroyer::instances); // The global one.
-  EXPECT_EQ(0, FastDestroyer::instances);
-
-  {
-    auto gentle = world_destroyer.TryNew("gentle-destroyer");
-    EXPECT_EQ(2, GentleDestroyer::instances);
+    EXPECT_EQ(1, GentleDestroyer::instances);// The global one.
+    EXPECT_EQ(0, FastDestroyer::instances);
+
+    {
+        auto gentle = world_destroyer.TryNew("gentle-destroyer");
+        EXPECT_EQ(2, GentleDestroyer::instances);
+        EXPECT_EQ(0, FastDestroyer::instances);
+        auto fast = world_destroyer.TryNew("fast-destroyer");
+        EXPECT_EQ(2, GentleDestroyer::instances);
+        EXPECT_EQ(1, FastDestroyer::instances);
+    }
+    EXPECT_EQ(1, GentleDestroyer::instances);
     EXPECT_EQ(0, FastDestroyer::instances);
-    auto fast = world_destroyer.TryNew("fast-destroyer");
-    EXPECT_EQ(2, GentleDestroyer::instances);
-    EXPECT_EQ(1, FastDestroyer::instances);
-  }
-  EXPECT_EQ(1, GentleDestroyer::instances);
-  EXPECT_EQ(0, FastDestroyer::instances);
 }
 
-TEST(DependencyRegistry, ClassWithArgs) {
-  EXPECT_TRUE(with_arg_destroyer.TryGetFactory("speed-destroyer"));
-  EXPECT_TRUE(with_arg_destroyer.TryGetFactory("speed-destroyer-2"));
-  EXPECT_FALSE(with_arg_destroyer.TryGetFactory("speed-destroyer-3"));
-  EXPECT_TRUE(with_arg_destroyer.TryNew("speed-destroyer", 456));
-  EXPECT_TRUE(with_arg_destroyer.TryNew("speed-destroyer-2", 456));
-  EXPECT_FALSE(with_arg_destroyer.TryNew("speed-destroyer-3", 456));
+TEST(DependencyRegistry, ClassWithArgs)
+{
+    EXPECT_TRUE(with_arg_destroyer.TryGetFactory("speed-destroyer"));
+    EXPECT_TRUE(with_arg_destroyer.TryGetFactory("speed-destroyer-2"));
+    EXPECT_FALSE(with_arg_destroyer.TryGetFactory("speed-destroyer-3"));
+    EXPECT_TRUE(with_arg_destroyer.TryNew("speed-destroyer", 456));
+    EXPECT_TRUE(with_arg_destroyer.TryNew("speed-destroyer-2", 456));
+    EXPECT_FALSE(with_arg_destroyer.TryNew("speed-destroyer-3", 456));
 }
 
-} // namespace tile
+}// namespace tile

tile/base/down_cast.h

@@ -8,18 +8,22 @@
 #include <type_traits>
 
 namespace tile {
-template <typename To, typename From,
-          typename R = typename std::conditional<std::is_const<From>::value,
-                                                 const To *, To *>::type>
-inline R down_cast(From *ptr) {
-  TILE_DCHECK(dynamic_cast<R>(ptr));
-  return static_cast<R>(ptr);
+template<typename To,
+         typename From,
+         typename R = typename std::conditional<std::is_const<From>::value, const To *, To *>::type>
+inline R
+down_cast(From *ptr)
+{
+    TILE_DCHECK(dynamic_cast<R>(ptr));
+    return static_cast<R>(ptr);
 }
 
-template <typename To, typename From>
-inline auto down_cast(From &ref) -> decltype(down_cast(&ref)) {
-  return down_cast<To>(&ref);
+template<typename To, typename From>
+inline auto
+down_cast(From &ref) -> decltype(down_cast(&ref))
+{
+    return down_cast<To>(&ref);
 }
-} // namespace tile
+}// namespace tile
 
-#endif // _TILE_BASE_DOWN_CAST_H
+#endif// _TILE_BASE_DOWN_CAST_H

tile/base/down_cast_test.cc

@@ -3,22 +3,25 @@
 
 namespace tile {
 struct A {
-  virtual ~A() = default;
+    virtual ~A() = default;
 };
+
 struct B : A {};
 
-TEST(DownCast, All) {
-  B b;
-  A *ptr = &b;
-  ASSERT_NE(nullptr, down_cast<B>(ptr));
-  ASSERT_NE(nullptr, down_cast<B>(const_cast<const A *>(ptr)));
+TEST(DownCast, All)
+{
+    B b;
+    A *ptr = &b;
+    ASSERT_NE(nullptr, down_cast<B>(ptr));
+    ASSERT_NE(nullptr, down_cast<B>(const_cast<const A *>(ptr)));
 }
 
 #ifndef NDEBUG
-TEST(CastDeathTest, DownCast) {
-  A a;
-  A *ptr = &a;
-  ASSERT_DEATH(down_cast<B>(ptr), "");
+TEST(CastDeathTest, DownCast)
+{
+    A a;
+    A *ptr = &a;
+    ASSERT_DEATH(down_cast<B>(ptr), "");
 }
 #endif
-} // namespace tile
+}// namespace tile

tile/base/encoding.h

@@ -7,4 +7,4 @@
 #include "tile/base/encoding/hex.h"
 #include "tile/base/encoding/percent.h"
 
-#endif // _TILE_BASE_ENCODING_H
+#endif// _TILE_BASE_ENCODING_H

tile/base/encoding/base64.cc

@@ -19,137 +19,132 @@ static constexpr std::size_t kBufferSize = BLOCK_SIZE_1M;
 #undef BLOCK_SIZE_64K
 #undef BLOCK_SIZE_1M
 
-} // namespace
+}// namespace
 
-std::string EncodeBase64(Slice from) {
-  std::string result;
-  EncodeBase64(from, &result);
-  return result;
-}
-std::optional<std::string> DecodeBase64(Slice from) {
-  std::string result;
-  if (!DecodeBase64(from, &result)) {
-    return std::nullopt;
-  }
-  return result;
+std::string
+EncodeBase64(Slice from)
+{
+    std::string result;
+    EncodeBase64(from, &result);
+    return result;
 }
 
-void EncodeBase64(Slice from, std::string *to) {
-  TILE_CHECK(from.size() < std::numeric_limits<int>::max(),
-             "Not implemented: Source bytes too long. {} > max_size({})",
-             from.size(), std::numeric_limits<int>::max());
-
-  const auto size = 4 * ((from.size() + 2) / 3);
-  to->resize(size);
-  base64_encodestate state;
-  base64_init_encodestate(&state);
-
-  std::size_t used = 0;
-  std::size_t input_len;
-  while (!from.empty()) {
-    input_len = std::min(kBufferSize, from.size());
-    used += base64_encode_block(
-        reinterpret_cast<const char *>(from.data()), input_len,
-        reinterpret_cast<char *>(internal::RemoveConstPtr(to->data())) + used,
-        &state);
-    from.RemovePrefix(input_len);
-  };
-  base64_encode_blockend(
-      reinterpret_cast<char *>(internal::RemoveConstPtr(to->data())) + used,
-      &state);
-
-  // bool success =
-  //     Base64::Encode(from.data(), from.size(),
-  //                    internal::RemoveConstPtr(to->data()), to->size());
-  // TILE_CHECK(success, "Unexpected: Failed to do base64-encode.");
+std::optional<std::string>
+DecodeBase64(Slice from)
+{
+    std::string result;
+    if (!DecodeBase64(from, &result)) { return std::nullopt; }
+    return result;
 }
 
-bool DecodeBase64(Slice from, std::string *to) {
-  if (TILE_UNLIKELY(from.empty())) {
-    to->clear();
-    return true;
-  }
+void
+EncodeBase64(Slice from, std::string *to)
+{
+    TILE_CHECK(from.size() < std::numeric_limits<int>::max(),
+               "Not implemented: Source bytes too long. {} > max_size({})", from.size(),
+               std::numeric_limits<int>::max());
 
-  std::string safe_from_str;
-  // auto padding
-  auto padding = (4 - from.size() % 4) % 4;
-  if (padding > 2) {
-    return false;
-  } else if (padding != 0) {
-    TILE_LOG_WARNING("`from.size()` [{}] Can not be divisible by 4. "
-                     "auto add padding [{}] `=`",
-                     from.size(), padding);
-    safe_from_str = from.ToString() + std::string(padding, '=');
-    from = safe_from_str;
-  }
+    const auto size = 4 * ((from.size() + 2) / 3);
+    to->resize(size);
+    base64_encodestate state;
+    base64_init_encodestate(&state);
 
-  auto size = 3 * from.size() / 4;
-  to->resize(size);
-
-  {
-    Slice input = from;
-    base64_decodestate state;
-    base64_init_decodestate(&state);
     std::size_t used = 0;
-    while (!input.empty()) {
-      auto input_len = std::min(kBufferSize, from.size());
-      auto encoded_len = base64_decode_block(
-          input.data(), input_len,
-          reinterpret_cast<char *>(internal::RemoveConstPtr(to->data())) + used,
-          &state);
-      if (TILE_UNLIKELY(encoded_len == 0)) {
-        return false;
-      }
-      used += encoded_len;
-      input.RemovePrefix(input_len);
-    }
-  }
+    std::size_t input_len;
+    while (!from.empty()) {
+        input_len = std::min(kBufferSize, from.size());
+        used += base64_encode_block(reinterpret_cast<const char *>(from.data()), input_len,
+                                    reinterpret_cast<char *>(internal::RemoveConstPtr(to->data())) + used, &state);
+        from.RemovePrefix(input_len);
+    };
+    base64_encode_blockend(reinterpret_cast<char *>(internal::RemoveConstPtr(to->data())) + used, &state);
 
-  // === Sample
-  // {
-  //   bool success =
-  //       Base64::Decode(from.data(), from.size(),
-  //                      internal::RemoveConstPtr(to->data()), to->size());
-  //   if (!success) {
-  //     return false;
-  //   }
-  // }
-
-  // === OpenSSL
-  // int rc;
-  // rc = EVP_DecodeBlock(
-  //     reinterpret_cast<unsigned char
-  //     *>(internal::RemoveConstPtr(to->data())), reinterpret_cast<const
-  //     unsigned char *>(from.data()), from.size());
-  // if (rc != size) {
-  //   return false;
-  // }
-  //
-  // @sa: https://tools.ietf.org/html/rfc4648#section-4
-  //
-  // (1) The final quantum of encoding input is an integral multiple of 24
-  //     bits; here, the final unit of encoded output will be an integral
-  //     multiple of 4 characters with no "=" padding.
-  //
-  // (2) The final quantum of encoding input is exactly 8 bits; here, the
-  //     final unit of encoded output will be two characters followed by
-  //     two "=" padding characters.
-  //
-  // (3) The final quantum of encoding input is exactly 16 bits; here, the
-  //     final unit of encoded output will be three characters followed by
-  //     one "=" padding character.
-  TILE_CHECK(from.size() >= 2 && to->size() >= 2);
-  if (from[from.size() - 1] == '=') {
-    to->pop_back();
-  }
-
-  if (from[from.size() - 2] == '=') {
-    to->pop_back();
-  }
-
-  // to->pop_back(); // Remove Terminating null
-
-  return true;
+    // bool success =
+    //     Base64::Encode(from.data(), from.size(),
+    //                    internal::RemoveConstPtr(to->data()), to->size());
+    // TILE_CHECK(success, "Unexpected: Failed to do base64-encode.");
 }
 
-} // namespace tile
+bool
+DecodeBase64(Slice from, std::string *to)
+{
+    if (TILE_UNLIKELY(from.empty())) {
+        to->clear();
+        return true;
+    }
+
+    std::string safe_from_str;
+    // auto padding
+    auto padding = (4 - from.size() % 4) % 4;
+    if (padding > 2) {
+        return false;
+    } else if (padding != 0) {
+        TILE_LOG_WARNING("`from.size()` [{}] Can not be divisible by 4. "
+                         "auto add padding [{}] `=`",
+                         from.size(), padding);
+        safe_from_str = from.ToString() + std::string(padding, '=');
+        from          = safe_from_str;
+    }
+
+    auto size = 3 * from.size() / 4;
+    to->resize(size);
+
+    {
+        Slice input = from;
+        base64_decodestate state;
+        base64_init_decodestate(&state);
+        std::size_t used = 0;
+        while (!input.empty()) {
+            auto input_len   = std::min(kBufferSize, from.size());
+            auto encoded_len = base64_decode_block(
+                input.data(), input_len, reinterpret_cast<char *>(internal::RemoveConstPtr(to->data())) + used, &state);
+            if (TILE_UNLIKELY(encoded_len == 0)) { return false; }
+            used += encoded_len;
+            input.RemovePrefix(input_len);
+        }
+    }
+
+    // === Sample
+    // {
+    //   bool success =
+    //       Base64::Decode(from.data(), from.size(),
+    //                      internal::RemoveConstPtr(to->data()), to->size());
+    //   if (!success) {
+    //     return false;
+    //   }
+    // }
+
+    // === OpenSSL
+    // int rc;
+    // rc = EVP_DecodeBlock(
+    //     reinterpret_cast<unsigned char
+    //     *>(internal::RemoveConstPtr(to->data())), reinterpret_cast<const
+    //     unsigned char *>(from.data()), from.size());
+    // if (rc != size) {
+    //   return false;
+    // }
+    //
+    // @sa: https://tools.ietf.org/html/rfc4648#section-4
+    //
+    // (1) The final quantum of encoding input is an integral multiple of 24
+    //     bits; here, the final unit of encoded output will be an integral
+    //     multiple of 4 characters with no "=" padding.
+    //
+    // (2) The final quantum of encoding input is exactly 8 bits; here, the
+    //     final unit of encoded output will be two characters followed by
+    //     two "=" padding characters.
+    //
+    // (3) The final quantum of encoding input is exactly 16 bits; here, the
+    //     final unit of encoded output will be three characters followed by
+    //     one "=" padding character.
+    TILE_CHECK(from.size() >= 2 && to->size() >= 2);
+    if (from[from.size() - 1] == '=') { to->pop_back(); }
+
+    if (from[from.size() - 2] == '=') { to->pop_back(); }
+
+    // to->pop_back(); // Remove Terminating null
+
+    return true;
+}
+
+}// namespace tile

tile/base/encoding/base64.h

@@ -13,6 +13,6 @@ std::optional<std::string> DecodeBase64(Slice from);
 
 void EncodeBase64(Slice from, std::string *to);
 bool DecodeBase64(Slice from, std::string *to);
-} // namespace tile
+}// namespace tile
 
-#endif // _TILE_BASE_ENCODING_BASE64_H
+#endif// _TILE_BASE_ENCODING_BASE64_H

tile/base/encoding/base64_test.cc

@@ -9,70 +9,75 @@
 
 namespace tile {
 
-static constexpr auto kText = ".<>@????????";
-static constexpr auto kBase64Text = "Ljw+QD8/Pz8/Pz8/";
-static constexpr auto kText2 = ".<>@???????";
+static constexpr auto kText        = ".<>@????????";
+static constexpr auto kBase64Text  = "Ljw+QD8/Pz8/Pz8/";
+static constexpr auto kText2       = ".<>@???????";
 static constexpr auto kBase64Text2 = "Ljw+QD8/Pz8/Pz8=";
 
-TEST(Base64, Default) {
-  EXPECT_EQ(kBase64Text, EncodeBase64(kText));
-  auto decoded = DecodeBase64(kBase64Text);
-  ASSERT_TRUE(decoded);
-  EXPECT_EQ(kText, *decoded);
-  EXPECT_FALSE(DecodeBase64("some-invalid-base64-encoded!!"));
-}
-
-TEST(Base64, Padding) {
-  EXPECT_EQ(kBase64Text2, EncodeBase64(kText2));
-
-  auto decoded = DecodeBase64(kBase64Text2);
-  ASSERT_TRUE(decoded);
-  EXPECT_EQ(kText2, *decoded);
-}
-
-TEST(Base64, Empty) {
-  EXPECT_EQ("", EncodeBase64(""));
-  auto decoded = DecodeBase64("");
-  ASSERT_TRUE(decoded);
-  EXPECT_EQ("", *decoded);
-}
-
-TEST(Base64, AutoPadding) {
-  static constexpr auto kChar = "A";
-
-  EXPECT_EQ("QQ==", EncodeBase64(kChar));
-
-  {
-    auto decoded = DecodeBase64("QQ==");
+TEST(Base64, Default)
+{
+    EXPECT_EQ(kBase64Text, EncodeBase64(kText));
+    auto decoded = DecodeBase64(kBase64Text);
     ASSERT_TRUE(decoded);
-    EXPECT_EQ(kChar, *decoded);
-  }
-
-  // auto padding, 1
-  {
-    auto decoded1 = DecodeBase64("QQ=");
-    ASSERT_TRUE(decoded1);
-    EXPECT_EQ(kChar, *decoded1);
-  }
-
-  // auto padding, 2
-  {
-    auto decoded2 = DecodeBase64("QQ");
-    ASSERT_TRUE(decoded2);
-    EXPECT_EQ(kChar, *decoded2);
-  }
+    EXPECT_EQ(kText, *decoded);
+    EXPECT_FALSE(DecodeBase64("some-invalid-base64-encoded!!"));
 }
 
-TEST(Base64, Torture) {
-  std::string random_str;
-  std::string encoded;
-  std::string decoded;
-  for (int i = 0; i != 1000; ++i) {
-    testing::RandomString(&random_str, 10000, 10000);
-    EncodeBase64(random_str, &encoded);
-    ASSERT_TRUE(DecodeBase64(encoded, &decoded));
-    EXPECT_EQ(random_str, decoded);
-  }
+TEST(Base64, Padding)
+{
+    EXPECT_EQ(kBase64Text2, EncodeBase64(kText2));
+
+    auto decoded = DecodeBase64(kBase64Text2);
+    ASSERT_TRUE(decoded);
+    EXPECT_EQ(kText2, *decoded);
 }
 
-} // namespace tile
+TEST(Base64, Empty)
+{
+    EXPECT_EQ("", EncodeBase64(""));
+    auto decoded = DecodeBase64("");
+    ASSERT_TRUE(decoded);
+    EXPECT_EQ("", *decoded);
+}
+
+TEST(Base64, AutoPadding)
+{
+    static constexpr auto kChar = "A";
+
+    EXPECT_EQ("QQ==", EncodeBase64(kChar));
+
+    {
+        auto decoded = DecodeBase64("QQ==");
+        ASSERT_TRUE(decoded);
+        EXPECT_EQ(kChar, *decoded);
+    }
+
+    // auto padding, 1
+    {
+        auto decoded1 = DecodeBase64("QQ=");
+        ASSERT_TRUE(decoded1);
+        EXPECT_EQ(kChar, *decoded1);
+    }
+
+    // auto padding, 2
+    {
+        auto decoded2 = DecodeBase64("QQ");
+        ASSERT_TRUE(decoded2);
+        EXPECT_EQ(kChar, *decoded2);
+    }
+}
+
+TEST(Base64, Torture)
+{
+    std::string random_str;
+    std::string encoded;
+    std::string decoded;
+    for (int i = 0; i != 1000; ++i) {
+        testing::RandomString(&random_str, 10000, 10000);
+        EncodeBase64(random_str, &encoded);
+        ASSERT_TRUE(DecodeBase64(encoded, &decoded));
+        EXPECT_EQ(random_str, decoded);
+    }
+}
+
+}// namespace tile

tile/base/encoding/detail/base64_impl.h

@@ -3,286 +3,247 @@
 
 #include <string>
 
-const char kBase64Alphabet[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
-                               "abcdefghijklmnopqrstuvwxyz"
-                               "0123456789+/";
+const char kBase64Alphabet[] =
+    "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+    "abcdefghijklmnopqrstuvwxyz"
+    "0123456789+/";
 
 namespace {
-static inline unsigned char b64_lookup_aux(unsigned char c) {
-  if (c >= 'A' && c <= 'Z')
-    return c - 'A';
-  if (c >= 'a' && c <= 'z')
-    return c - 71;
-  if (c >= '0' && c <= '9')
-    return c + 4;
-  if (c == '+')
-    return 62;
-  if (c == '/')
-    return 63;
-  return 255;
+static inline unsigned char
+b64_lookup_aux(unsigned char c)
+{
+    if (c >= 'A' && c <= 'Z') return c - 'A';
+    if (c >= 'a' && c <= 'z') return c - 71;
+    if (c >= '0' && c <= '9') return c + 4;
+    if (c == '+') return 62;
+    if (c == '/') return 63;
+    return 255;
 }
-struct Base64LookupInitializer {
-  Base64LookupInitializer() {
-    for (int i = 0; i < 256; i++) {
-      kBase64Lookup[i] = b64_lookup_aux(i);
-    }
-  }
 
-  int kBase64Lookup[256];
+struct Base64LookupInitializer {
+    Base64LookupInitializer()
+    {
+        for (int i = 0; i < 256; i++) { kBase64Lookup[i] = b64_lookup_aux(i); }
+    }
+
+    int kBase64Lookup[256];
 };
 
-static inline unsigned char b64_lookup_aux1(unsigned char c) {
-  static Base64LookupInitializer init;
-  return init.kBase64Lookup[c];
+static inline unsigned char
+b64_lookup_aux1(unsigned char c)
+{
+    static Base64LookupInitializer init;
+    return init.kBase64Lookup[c];
+}
+}// namespace
+
+inline unsigned char
+b64_lookup(unsigned char c)
+{
+    return b64_lookup_aux1(c);
 }
-} // namespace
-inline unsigned char b64_lookup(unsigned char c) { return b64_lookup_aux1(c); }
 
 class Base64 {
 public:
-  static bool Encode(const std::string &in, std::string *out) {
-    int i = 0, j = 0;
-    size_t enc_len = 0;
-    unsigned char a3[3];
-    unsigned char a4[4];
+    static bool Encode(const std::string &in, std::string *out)
+    {
+        int i = 0, j = 0;
+        size_t enc_len = 0;
+        unsigned char a3[3];
+        unsigned char a4[4];
 
-    out->resize(EncodedLength(in));
+        out->resize(EncodedLength(in));
 
-    size_t input_len = in.size();
-    std::string::const_iterator input = in.begin();
+        size_t input_len                  = in.size();
+        std::string::const_iterator input = in.begin();
 
-    while (input_len--) {
-      a3[i++] = *(input++);
-      if (i == 3) {
-        a3_to_a4(a4, a3);
+        while (input_len--) {
+            a3[i++] = *(input++);
+            if (i == 3) {
+                a3_to_a4(a4, a3);
 
-        for (i = 0; i < 4; i++) {
-          (*out)[enc_len++] = kBase64Alphabet[a4[i]];
+                for (i = 0; i < 4; i++) { (*out)[enc_len++] = kBase64Alphabet[a4[i]]; }
+
+                i = 0;
+            }
         }
 
-        i = 0;
-      }
-    }
+        if (i) {
+            for (j = i; j < 3; j++) { a3[j] = '\0'; }
 
-    if (i) {
-      for (j = i; j < 3; j++) {
-        a3[j] = '\0';
-      }
+            a3_to_a4(a4, a3);
 
-      a3_to_a4(a4, a3);
+            for (j = 0; j < i + 1; j++) { (*out)[enc_len++] = kBase64Alphabet[a4[j]]; }
 
-      for (j = 0; j < i + 1; j++) {
-        (*out)[enc_len++] = kBase64Alphabet[a4[j]];
-      }
-
-      while ((i++ < 3)) {
-        (*out)[enc_len++] = '=';
-      }
-    }
-
-    return (enc_len == out->size());
-  }
-
-  static bool Encode(const char *input, size_t input_length, char *out,
-                     size_t out_length) {
-    int i = 0, j = 0;
-    char *out_begin = out;
-    unsigned char a3[3];
-    unsigned char a4[4];
-
-    size_t encoded_length = EncodedLength(input_length);
-
-    if (out_length < encoded_length)
-      return false;
-
-    while (input_length--) {
-      a3[i++] = *input++;
-      if (i == 3) {
-        a3_to_a4(a4, a3);
-
-        for (i = 0; i < 4; i++) {
-          *out++ = kBase64Alphabet[a4[i]];
-        }
-        // out[0] = kBase64Alphabet[a4[0]];
-        // out[1] = kBase64Alphabet[a4[1]];
-        // out[2] = kBase64Alphabet[a4[2]];
-        // out[3] = kBase64Alphabet[a4[3]];
-        // out += 4;
-
-        i = 0;
-      }
-    }
-
-    if (i) {
-      for (j = i; j < 3; j++) {
-        a3[j] = '\0';
-      }
-
-      a3_to_a4(a4, a3);
-
-      for (j = 0; j < i + 1; j++) {
-        *out++ = kBase64Alphabet[a4[j]];
-      }
-
-      while ((i++ < 3)) {
-        *out++ = '=';
-      }
-    }
-
-    return (out == (out_begin + encoded_length));
-  }
-
-  static bool Decode(const std::string &in, std::string *out) {
-    int i = 0, j = 0;
-    size_t dec_len = 0;
-    unsigned char a3[3];
-    unsigned char a4[4];
-
-    size_t input_len = in.size();
-    std::string::const_iterator input = in.begin();
-
-    out->resize(DecodedLength(in));
-
-    while (input_len--) {
-      if (*input == '=') {
-        break;
-      }
-
-      a4[i++] = *(input++);
-      if (i == 4) {
-        for (i = 0; i < 4; i++) {
-          a4[i] = b64_lookup(a4[i]);
+            while ((i++ < 3)) { (*out)[enc_len++] = '='; }
         }
 
-        a4_to_a3(a3, a4);
+        return (enc_len == out->size());
+    }
 
-        for (i = 0; i < 3; i++) {
-          (*out)[dec_len++] = a3[i];
+    static bool Encode(const char *input, size_t input_length, char *out, size_t out_length)
+    {
+        int i = 0, j = 0;
+        char *out_begin = out;
+        unsigned char a3[3];
+        unsigned char a4[4];
+
+        size_t encoded_length = EncodedLength(input_length);
+
+        if (out_length < encoded_length) return false;
+
+        while (input_length--) {
+            a3[i++] = *input++;
+            if (i == 3) {
+                a3_to_a4(a4, a3);
+
+                for (i = 0; i < 4; i++) { *out++ = kBase64Alphabet[a4[i]]; }
+                // out[0] = kBase64Alphabet[a4[0]];
+                // out[1] = kBase64Alphabet[a4[1]];
+                // out[2] = kBase64Alphabet[a4[2]];
+                // out[3] = kBase64Alphabet[a4[3]];
+                // out += 4;
+
+                i = 0;
+            }
         }
 
-        i = 0;
-      }
-    }
+        if (i) {
+            for (j = i; j < 3; j++) { a3[j] = '\0'; }
 
-    if (i) {
-      for (j = i; j < 4; j++) {
-        a4[j] = '\0';
-      }
+            a3_to_a4(a4, a3);
 
-      for (j = 0; j < 4; j++) {
-        a4[j] = b64_lookup(a4[j]);
-      }
+            for (j = 0; j < i + 1; j++) { *out++ = kBase64Alphabet[a4[j]]; }
 
-      a4_to_a3(a3, a4);
-
-      for (j = 0; j < i - 1; j++) {
-        (*out)[dec_len++] = a3[j];
-      }
-    }
-
-    return (dec_len == out->size());
-  }
-
-  static bool Decode(const char *input, size_t input_length, char *out,
-                     size_t out_length) {
-    int i = 0, j = 0;
-    char *out_begin = out;
-    unsigned char a3[3];
-    unsigned char a4[4];
-
-    size_t decoded_length = DecodedLength(input, input_length);
-
-    if (out_length < decoded_length)
-      return false;
-
-    while (input_length--) {
-      if (*input == '=') {
-        break;
-      }
-
-      a4[i++] = *(input++);
-      if (i == 4) {
-        for (i = 0; i < 4; i++) {
-          a4[i] = b64_lookup(a4[i]);
+            while ((i++ < 3)) { *out++ = '='; }
         }
 
-        a4_to_a3(a3, a4);
+        return (out == (out_begin + encoded_length));
+    }
 
-        for (i = 0; i < 3; i++) {
-          *out++ = a3[i];
+    static bool Decode(const std::string &in, std::string *out)
+    {
+        int i = 0, j = 0;
+        size_t dec_len = 0;
+        unsigned char a3[3];
+        unsigned char a4[4];
+
+        size_t input_len                  = in.size();
+        std::string::const_iterator input = in.begin();
+
+        out->resize(DecodedLength(in));
+
+        while (input_len--) {
+            if (*input == '=') { break; }
+
+            a4[i++] = *(input++);
+            if (i == 4) {
+                for (i = 0; i < 4; i++) { a4[i] = b64_lookup(a4[i]); }
+
+                a4_to_a3(a3, a4);
+
+                for (i = 0; i < 3; i++) { (*out)[dec_len++] = a3[i]; }
+
+                i = 0;
+            }
         }
 
-        i = 0;
-      }
+        if (i) {
+            for (j = i; j < 4; j++) { a4[j] = '\0'; }
+
+            for (j = 0; j < 4; j++) { a4[j] = b64_lookup(a4[j]); }
+
+            a4_to_a3(a3, a4);
+
+            for (j = 0; j < i - 1; j++) { (*out)[dec_len++] = a3[j]; }
+        }
+
+        return (dec_len == out->size());
     }
 
-    if (i) {
-      for (j = i; j < 4; j++) {
-        a4[j] = '\0';
-      }
+    static bool Decode(const char *input, size_t input_length, char *out, size_t out_length)
+    {
+        int i = 0, j = 0;
+        char *out_begin = out;
+        unsigned char a3[3];
+        unsigned char a4[4];
 
-      for (j = 0; j < 4; j++) {
-        a4[j] = b64_lookup(a4[j]);
-      }
+        size_t decoded_length = DecodedLength(input, input_length);
 
-      a4_to_a3(a3, a4);
+        if (out_length < decoded_length) return false;
 
-      for (j = 0; j < i - 1; j++) {
-        *out++ = a3[j];
-      }
+        while (input_length--) {
+            if (*input == '=') { break; }
+
+            a4[i++] = *(input++);
+            if (i == 4) {
+                for (i = 0; i < 4; i++) { a4[i] = b64_lookup(a4[i]); }
+
+                a4_to_a3(a3, a4);
+
+                for (i = 0; i < 3; i++) { *out++ = a3[i]; }
+
+                i = 0;
+            }
+        }
+
+        if (i) {
+            for (j = i; j < 4; j++) { a4[j] = '\0'; }
+
+            for (j = 0; j < 4; j++) { a4[j] = b64_lookup(a4[j]); }
+
+            a4_to_a3(a3, a4);
+
+            for (j = 0; j < i - 1; j++) { *out++ = a3[j]; }
+        }
+
+        return (out == (out_begin + decoded_length));
     }
 
-    return (out == (out_begin + decoded_length));
-  }
+    static size_t DecodedLength(const char *in, size_t in_length)
+    {
+        int numEq          = 0;
 
-  static size_t DecodedLength(const char *in, size_t in_length) {
-    int numEq = 0;
+        const char *in_end = in + in_length;
+        while (*--in_end == '=') ++numEq;
 
-    const char *in_end = in + in_length;
-    while (*--in_end == '=')
-      ++numEq;
-
-    return ((6 * in_length) / 8) - numEq;
-  }
-
-  static size_t DecodedLength(const std::string &in) {
-    int numEq = 0;
-    size_t n = in.size();
-
-    for (std::string::const_reverse_iterator it = in.rbegin(); *it == '=';
-         ++it) {
-      ++numEq;
+        return ((6 * in_length) / 8) - numEq;
     }
 
-    return ((6 * n) / 8) - numEq;
-  }
+    static size_t DecodedLength(const std::string &in)
+    {
+        int numEq = 0;
+        size_t n  = in.size();
 
-  inline static size_t EncodedLength(size_t length) {
-    return (length + 2 - ((length + 2) % 3)) / 3 * 4;
-  }
+        for (std::string::const_reverse_iterator it = in.rbegin(); *it == '='; ++it) { ++numEq; }
 
-  inline static size_t EncodedLength(const std::string &in) {
-    return EncodedLength(in.length());
-  }
+        return ((6 * n) / 8) - numEq;
+    }
 
-  inline static void StripPadding(std::string *in) {
-    while (!in->empty() && *(in->rbegin()) == '=')
-      in->resize(in->size() - 1);
-  }
+    inline static size_t EncodedLength(size_t length) { return (length + 2 - ((length + 2) % 3)) / 3 * 4; }
+
+    inline static size_t EncodedLength(const std::string &in) { return EncodedLength(in.length()); }
+
+    inline static void StripPadding(std::string *in)
+    {
+        while (!in->empty() && *(in->rbegin()) == '=') in->resize(in->size() - 1);
+    }
 
 private:
-  static inline void a3_to_a4(unsigned char *a4, unsigned char *a3) {
-    a4[0] = (a3[0] & 0xfc) >> 2;
-    a4[1] = ((a3[0] & 0x03) << 4) + ((a3[1] & 0xf0) >> 4);
-    a4[2] = ((a3[1] & 0x0f) << 2) + ((a3[2] & 0xc0) >> 6);
-    a4[3] = (a3[2] & 0x3f);
-  }
+    static inline void a3_to_a4(unsigned char *a4, unsigned char *a3)
+    {
+        a4[0] = (a3[0] & 0xfc) >> 2;
+        a4[1] = ((a3[0] & 0x03) << 4) + ((a3[1] & 0xf0) >> 4);
+        a4[2] = ((a3[1] & 0x0f) << 2) + ((a3[2] & 0xc0) >> 6);
+        a4[3] = (a3[2] & 0x3f);
+    }
 
-  static inline void a4_to_a3(unsigned char *a3, unsigned char *a4) {
-    a3[0] = (a4[0] << 2) + ((a4[1] & 0x30) >> 4);
-    a3[1] = ((a4[1] & 0xf) << 4) + ((a4[2] & 0x3c) >> 2);
-    a3[2] = ((a4[2] & 0x3) << 6) + a4[3];
-  }
+    static inline void a4_to_a3(unsigned char *a3, unsigned char *a4)
+    {
+        a3[0] = (a4[0] << 2) + ((a4[1] & 0x30) >> 4);
+        a3[1] = ((a4[1] & 0xf) << 4) + ((a4[2] & 0x3c) >> 2);
+        a3[2] = ((a4[2] & 0x3) << 6) + a4[3];
+    }
 };
 
-#endif // BASE64_H
+#endif// BASE64_H

tile/base/encoding/detail/hex_chars.cc

@@ -6,80 +6,88 @@ namespace detail {
 namespace {
 static constexpr auto kCharMin = std::numeric_limits<char>::min();
 static constexpr auto kCharMax = std::numeric_limits<char>::max();
-static constexpr auto kSize = kCharMax - kCharMin + 1;
+static constexpr auto kSize    = kCharMax - kCharMin + 1;
 
-int AsciiCodeFromCharPairSlow(char a, char b) {
-  a = ToLower(a);
-  b = ToLower(b);
-  auto ToNum = [](char x) {
-    if (x >= '0' && x <= '9') {
-      return x - '0';
-    } else if (x >= 'a' && x <= 'f') {
-      return x - 'a' + 10;
+int
+AsciiCodeFromCharPairSlow(char a, char b)
+{
+    a          = ToLower(a);
+    b          = ToLower(b);
+    auto ToNum = [](char x) {
+        if (x >= '0' && x <= '9') {
+            return x - '0';
+        } else if (x >= 'a' && x <= 'f') {
+            return x - 'a' + 10;
+        } else {
+            return -1;
+        }
+    };
+
+    int x = ToNum(a);
+    int y = ToNum(b);
+    if (x == -1 || y == -1) { return -1; }
+
+    return (x << 4) | y;
+}
+
+std::pair<char, char>
+AsciiCodeToCharPairSlow(std::uint8_t value, bool uppercase)
+{
+    if (uppercase) {
+        return std::make_pair(kHexCharsUpper[value >> 4], kHexCharsUpper[value & 0x0f]);
     } else {
-      return -1;
+        return std::make_pair(kHexCharsLower[value >> 4], kHexCharsLower[value & 0x0f]);
     }
-  };
-
-  int x = ToNum(a);
-  int y = ToNum(b);
-  if (x == -1 || y == -1) {
-    return -1;
-  }
-
-  return (x << 4) | y;
 }
 
-std::pair<char, char> AsciiCodeToCharPairSlow(std::uint8_t value,
-                                              bool uppercase) {
-  if (uppercase) {
-    return std::make_pair(kHexCharsUpper[value >> 4],
-                          kHexCharsUpper[value & 0x0f]);
-  } else {
-    return std::make_pair(kHexCharsLower[value >> 4],
-                          kHexCharsLower[value & 0x0f]);
-  }
-}
-
-std::array<std::array<int, 256>, 256> GenAsciiCodeFromCharPairTable() {
-  std::array<std::array<int, 256>, 256> table;
-  for (char i = kCharMin; i != kCharMax; ++i) {
-    for (char j = kCharMin; j != kCharMax; ++j) {
-      table[i - kCharMin][j - kCharMin] = AsciiCodeFromCharPairSlow(i, j);
+std::array<std::array<int, 256>, 256>
+GenAsciiCodeFromCharPairTable()
+{
+    std::array<std::array<int, 256>, 256> table;
+    for (char i = kCharMin; i != kCharMax; ++i) {
+        for (char j = kCharMin; j != kCharMax; ++j) {
+            table[i - kCharMin][j - kCharMin] = AsciiCodeFromCharPairSlow(i, j);
+        }
     }
-  }
-  return table;
+    return table;
 }
 
 std::array<std::pair<char, char>, 256>
-GenAsciiCodeToCharPairTable(bool uppercase) {
-  std::array<std::pair<char, char>, 256> table;
-  for (int i = 0; i != 256; ++i) {
-    table[i] = AsciiCodeToCharPairSlow(i, uppercase);
-  }
-  return table;
+GenAsciiCodeToCharPairTable(bool uppercase)
+{
+    std::array<std::pair<char, char>, 256> table;
+    for (int i = 0; i != 256; ++i) { table[i] = AsciiCodeToCharPairSlow(i, uppercase); }
+    return table;
 }
 
-} // namespace
+}// namespace
 
-int AsciiCodeFromCharPair(char a, char b) {
-  static auto table = GenAsciiCodeFromCharPairTable();
-  return table[a - kCharMin][b - kCharMin];
+int
+AsciiCodeFromCharPair(char a, char b)
+{
+    static auto table = GenAsciiCodeFromCharPairTable();
+    return table[a - kCharMin][b - kCharMin];
 }
 
-inline std::pair<char, char> AsciiCodeToUpperCharPair(std::uint8_t value) {
-  static auto table = GenAsciiCodeToCharPairTable(true);
-  return table[value];
-}
-inline std::pair<char, char> AsciiCodeToLowerCharPair(std::uint8_t value) {
-  static auto table = GenAsciiCodeToCharPairTable(false);
-  return table[value];
+inline std::pair<char, char>
+AsciiCodeToUpperCharPair(std::uint8_t value)
+{
+    static auto table = GenAsciiCodeToCharPairTable(true);
+    return table[value];
 }
 
-std::pair<char, char> AsciiCodeToCharPair(std::uint8_t value, bool uppercase) {
-  return uppercase ? AsciiCodeToUpperCharPair(value)
-                   : AsciiCodeToLowerCharPair(value);
+inline std::pair<char, char>
+AsciiCodeToLowerCharPair(std::uint8_t value)
+{
+    static auto table = GenAsciiCodeToCharPairTable(false);
+    return table[value];
 }
 
-} // namespace detail
-} // namespace tile
+std::pair<char, char>
+AsciiCodeToCharPair(std::uint8_t value, bool uppercase)
+{
+    return uppercase ? AsciiCodeToUpperCharPair(value) : AsciiCodeToLowerCharPair(value);
+}
+
+}// namespace detail
+}// namespace tile

tile/base/encoding/detail/hex_chars.h

@@ -13,7 +13,7 @@ namespace tile {
 namespace detail {
 
 struct CharPair {
-  char a, b;
+    char a, b;
 };
 
 static constexpr char kHexCharsLower[] = "0123456789abcdef";
@@ -23,10 +23,9 @@ static constexpr char kHexCharsUpper[] = "0123456789ABCDEF";
 
 int AsciiCodeFromCharPair(char a, char b);
 
-std::pair<char, char> AsciiCodeToCharPair(std::uint8_t value,
-                                          bool uppercase = true);
+std::pair<char, char> AsciiCodeToCharPair(std::uint8_t value, bool uppercase = true);
 
-} // namespace detail
-} // namespace tile
+}// namespace detail
+}// namespace tile
 
-#endif // _TILE_BASE_ENCODING_DETAIL_HEX_CHARS_H
+#endif// _TILE_BASE_ENCODING_DETAIL_HEX_CHARS_H

tile/base/encoding/hex.cc

@@ -6,48 +6,49 @@
 
 namespace tile {
 
-std::string EncodeHex(Slice from, bool uppercase) {
-  std::string result;
-  EncodeHex(from, &result, uppercase);
-  return result;
+std::string
+EncodeHex(Slice from, bool uppercase)
+{
+    std::string result;
+    EncodeHex(from, &result, uppercase);
+    return result;
 }
 
-std::optional<std::string> DecodeHex(Slice from) {
-  std::string result;
-  if (!DecodeHex(from, &result)) {
-    return std::nullopt;
-  }
-  return result;
+std::optional<std::string>
+DecodeHex(Slice from)
+{
+    std::string result;
+    if (!DecodeHex(from, &result)) { return std::nullopt; }
+    return result;
 }
 
-void EncodeHex(Slice from, std::string *to, bool uppercase) {
-  to->clear();
-  to->reserve(from.size() * 2);
-  for (auto &&e : from) {
-    // auto index = static_cast<std::uint8_t>(e);
-    auto pair =
-        detail::AsciiCodeToCharPair(static_cast<std::uint8_t>(e), uppercase);
-    to->append({pair.first, pair.second});
-  }
+void
+EncodeHex(Slice from, std::string *to, bool uppercase)
+{
+    to->clear();
+    to->reserve(from.size() * 2);
+    for (auto &&e : from) {
+        // auto index = static_cast<std::uint8_t>(e);
+        auto pair = detail::AsciiCodeToCharPair(static_cast<std::uint8_t>(e), uppercase);
+        to->append({pair.first, pair.second});
+    }
 }
 
-bool DecodeHex(Slice from, std::string *to) {
-  if (from.size() % 2 != 0) {
-    return false;
-  }
+bool
+DecodeHex(Slice from, std::string *to)
+{
+    if (from.size() % 2 != 0) { return false; }
 
-  to->clear();
-  to->reserve(from.size() / 2);
-  for (size_t i = 0; i != from.size(); i += 2) {
-    auto v = detail::AsciiCodeFromCharPair(from[i], from[i + 1]);
-    if (v == -1) {
-      return false;
+    to->clear();
+    to->reserve(from.size() / 2);
+    for (size_t i = 0; i != from.size(); i += 2) {
+        auto v = detail::AsciiCodeFromCharPair(from[i], from[i + 1]);
+        if (v == -1) { return false; }
+
+        TILE_CHECK(v >= 0 && v <= 255);
+        to->push_back(v);
     }
 
-    TILE_CHECK(v >= 0 && v <= 255);
-    to->push_back(v);
-  }
-
-  return true;
+    return true;
 }
-} // namespace tile
+}// namespace tile

tile/base/encoding/hex.h

@@ -11,6 +11,6 @@ std::optional<std::string> DecodeHex(Slice from);
 
 void EncodeHex(Slice from, std::string *to, bool uppercase = false);
 bool DecodeHex(Slice from, std::string *to);
-} // namespace tile
+}// namespace tile
 
-#endif // TILE_BASE_ENCODING_HEX_H
+#endif// TILE_BASE_ENCODING_HEX_H

tile/base/encoding/hex_test.cc

@@ -7,23 +7,25 @@
 namespace tile {
 const char Hex123456FF[] = "\x12\x34\x56\xFF";
 
-TEST(Hex, Default) {
-  EXPECT_EQ("123456ff", EncodeHex(Hex123456FF));
-  EXPECT_EQ("123456FF", EncodeHex(Hex123456FF, true));
-  EXPECT_EQ(Hex123456FF, *DecodeHex("123456ff"));
-  EXPECT_EQ(Hex123456FF, *DecodeHex("123456FF"));
+TEST(Hex, Default)
+{
+    EXPECT_EQ("123456ff", EncodeHex(Hex123456FF));
+    EXPECT_EQ("123456FF", EncodeHex(Hex123456FF, true));
+    EXPECT_EQ(Hex123456FF, *DecodeHex("123456ff"));
+    EXPECT_EQ(Hex123456FF, *DecodeHex("123456FF"));
 }
 
-TEST(Hex, Random) {
-  std::string random_str;
-  std::string encoded;
-  std::string decoded;
-  for (int i = 0; i != 1000; ++i) {
-    testing::RandomString(&random_str);
-    EncodeHex(random_str, &encoded);
-    ASSERT_TRUE(DecodeHex(encoded, &decoded));
-    EXPECT_EQ(random_str, decoded);
-  }
+TEST(Hex, Random)
+{
+    std::string random_str;
+    std::string encoded;
+    std::string decoded;
+    for (int i = 0; i != 1000; ++i) {
+        testing::RandomString(&random_str);
+        EncodeHex(random_str, &encoded);
+        ASSERT_TRUE(DecodeHex(encoded, &decoded));
+        EXPECT_EQ(random_str, decoded);
+    }
 }
 
-} // namespace tile
+}// namespace tile

tile/base/encoding/percent.cc

@@ -7,112 +7,107 @@ namespace tile {
 
 // [0-9a-zA-Z]
 namespace {
-std::array<bool, 256> GenerateUnescapedCharBitmap(Slice unescaped_chars) {
-  std::array<bool, 256> result{};
-  for (auto &&e : unescaped_chars) {
-    result[e] = true;
-  }
+std::array<bool, 256>
+GenerateUnescapedCharBitmap(Slice unescaped_chars)
+{
+    std::array<bool, 256> result{};
+    for (auto &&e : unescaped_chars) { result[e] = true; }
 
-  for (int i = 0; i != 10; ++i) {
-    result[i + '0'] = true;
-  }
+    for (int i = 0; i != 10; ++i) { result[i + '0'] = true; }
 
-  for (int i = 0; i != 26; ++i) {
-    result[i + 'A'] = true;
-    result[i + 'a'] = true;
-  }
+    for (int i = 0; i != 26; ++i) {
+        result[i + 'A'] = true;
+        result[i + 'a'] = true;
+    }
 
-  return result;
+    return result;
 }
 
 const std::array<std::array<bool, 256>, 2> &
-GetUnescapedCharBitmap(const PercentEncodingStyle &style) {
-  static const std::array<std::array<bool, 256>, 2> kUnescapedChars[] = {
-      /* emca262 = */ {GenerateUnescapedCharBitmap("_-,;:!?.'()@*/&#+=~$"),
-                       GenerateUnescapedCharBitmap("_-!.*~'()")},
+GetUnescapedCharBitmap(const PercentEncodingStyle &style)
+{
+    static const std::array<std::array<bool, 256>, 2> kUnescapedChars[] = {
+        /* emca262 = */ {GenerateUnescapedCharBitmap("_-,;:!?.'()@*/&#+=~$"),   GenerateUnescapedCharBitmap("_-!.*~'()")   },
 
-      /* rfc3986 = */
-      {GenerateUnescapedCharBitmap("_-,;:!?.'()[]@*/&#+=~$"),
-       GenerateUnescapedCharBitmap("_-.~")
+        /* rfc3986 = */
+        {GenerateUnescapedCharBitmap("_-,;:!?.'()[]@*/&#+=~$"), GenerateUnescapedCharBitmap("_-.~")
 
-      },
-      /* rfc5987 = */
-      {GenerateUnescapedCharBitmap("!#$&+-.^_`|~"),
-       GenerateUnescapedCharBitmap("!#$&+-.^_`|~")}};
+        },
+        /* rfc5987 = */
+        {GenerateUnescapedCharBitmap("!#$&+-.^_`|~"),           GenerateUnescapedCharBitmap("!#$&+-.^_`|~")}
+    };
 
-  return kUnescapedChars[static_cast<int>(style)];
+    return kUnescapedChars[static_cast<int>(style)];
 }
-} // namespace
+}// namespace
 
-PercentEncodingOptions::PercentEncodingOptions(PercentEncodingStyle s, bool er)
-    : style(s), escape_reserved(er) {}
+PercentEncodingOptions::PercentEncodingOptions(PercentEncodingStyle s, bool er) : style(s), escape_reserved(er) {}
 
-std::string EncodePercent(Slice from, const PercentEncodingOptions &options) {
-  std::string result;
-  EncodePercent(from, &result, options);
-  return result;
-}
-std::optional<std::string> DecodePercent(Slice from,
-                                         bool decode_plus_sign_as_whitespace) {
-  std::string result;
-  if (DecodePercent(from, &result, decode_plus_sign_as_whitespace)) {
+std::string
+EncodePercent(Slice from, const PercentEncodingOptions &options)
+{
+    std::string result;
+    EncodePercent(from, &result, options);
     return result;
-  }
-  return std::nullopt;
 }
 
-void EncodePercent(Slice from, std::string *to,
-                   const PercentEncodingOptions &options) {
-
-  auto &&unescaped =
-      GetUnescapedCharBitmap(options.style)[options.escape_reserved];
-
-  int escape_char_count = 0;
-  for (auto &&e : from) {
-    if (!unescaped[static_cast<std::uint8_t>(e)]) {
-      ++escape_char_count;
-    }
-  }
-
-  to->clear();
-  to->reserve(from.size() + escape_char_count * 2);
-
-  for (auto &&e : from) {
-    if (TILE_UNLIKELY(unescaped[static_cast<std::uint8_t>(e)])) {
-      to->push_back(e);
-    } else {
-      auto hex_pair = detail::AsciiCodeToCharPair(static_cast<std::uint8_t>(e));
-      to->append({'%', hex_pair.first, hex_pair.second});
-    }
-  }
+std::optional<std::string>
+DecodePercent(Slice from, bool decode_plus_sign_as_whitespace)
+{
+    std::string result;
+    if (DecodePercent(from, &result, decode_plus_sign_as_whitespace)) { return result; }
+    return std::nullopt;
 }
 
-bool DecodePercent(Slice from, std::string *to,
-                   bool decode_plus_sign_as_whitespace) {
-  to->clear();
-  to->reserve(from.size());
-  for (auto iter = from.begin(); iter != from.end();) {
-    if (*iter == '%') {
-      if (iter + 3 > from.end()) {
-        return false;
-      }
-      auto v = detail::AsciiCodeFromCharPair(*(iter + 1), *(iter + 2));
-      if (TILE_LIKELY(v != -1)) {
-        to->push_back(v);
-        iter += 3;
-      } else {
-        // invalid char
-        return false;
-      }
-    } else {
-      if (decode_plus_sign_as_whitespace && *iter == '+') {
-        to->push_back(' ');
-        ++iter;
-      } else {
-        to->push_back(*iter++);
-      }
+void
+EncodePercent(Slice from, std::string *to, const PercentEncodingOptions &options)
+{
+
+    auto &&unescaped      = GetUnescapedCharBitmap(options.style)[options.escape_reserved];
+
+    int escape_char_count = 0;
+    for (auto &&e : from) {
+        if (!unescaped[static_cast<std::uint8_t>(e)]) { ++escape_char_count; }
+    }
+
+    to->clear();
+    to->reserve(from.size() + escape_char_count * 2);
+
+    for (auto &&e : from) {
+        if (TILE_UNLIKELY(unescaped[static_cast<std::uint8_t>(e)])) {
+            to->push_back(e);
+        } else {
+            auto hex_pair = detail::AsciiCodeToCharPair(static_cast<std::uint8_t>(e));
+            to->append({'%', hex_pair.first, hex_pair.second});
+        }
     }
-  }
-  return true;
 }
-} // namespace tile
+
+bool
+DecodePercent(Slice from, std::string *to, bool decode_plus_sign_as_whitespace)
+{
+    to->clear();
+    to->reserve(from.size());
+    for (auto iter = from.begin(); iter != from.end();) {
+        if (*iter == '%') {
+            if (iter + 3 > from.end()) { return false; }
+            auto v = detail::AsciiCodeFromCharPair(*(iter + 1), *(iter + 2));
+            if (TILE_LIKELY(v != -1)) {
+                to->push_back(v);
+                iter += 3;
+            } else {
+                // invalid char
+                return false;
+            }
+        } else {
+            if (decode_plus_sign_as_whitespace && *iter == '+') {
+                to->push_back(' ');
+                ++iter;
+            } else {
+                to->push_back(*iter++);
+            }
+        }
+    }
+    return true;
+}
+}// namespace tile

tile/base/encoding/percent.h

@@ -9,32 +9,28 @@
 
 namespace tile {
 enum class PercentEncodingStyle {
-  Ecma262 = 0,
-  Rfc3986 = 1,
-  Rfc5987 = 2,
+    Ecma262 = 0,
+    Rfc3986 = 1,
+    Rfc5987 = 2,
 };
 
 struct PercentEncodingOptions {
-  PercentEncodingStyle style = PercentEncodingStyle::Rfc3986;
-  bool escape_reserved = true;
+    PercentEncodingStyle style = PercentEncodingStyle::Rfc3986;
+    bool escape_reserved       = true;
 
-  PercentEncodingOptions(PercentEncodingStyle s = PercentEncodingStyle::Rfc3986,
-                         bool escape_reserved = true);
+    PercentEncodingOptions(PercentEncodingStyle s = PercentEncodingStyle::Rfc3986, bool escape_reserved = true);
 };
 
 std::string
 EncodePercent(Slice from,
-              const PercentEncodingOptions &options =
-                  internal::EarlyInitConstant<PercentEncodingOptions>());
-std::optional<std::string>
-DecodePercent(Slice from, bool decode_plus_sign_as_whitespace = false);
+              const PercentEncodingOptions &options = internal::EarlyInitConstant<PercentEncodingOptions>());
+std::optional<std::string> DecodePercent(Slice from, bool decode_plus_sign_as_whitespace = false);
 
-void EncodePercent(Slice from, std::string *to,
-                   const PercentEncodingOptions &options =
-                       internal::EarlyInitConstant<PercentEncodingOptions>());
-bool DecodePercent(Slice from, std::string *to,
-                   bool decode_plus_sign_as_whitespace = false);
+void EncodePercent(Slice from,
+                   std::string *to,
+                   const PercentEncodingOptions &options = internal::EarlyInitConstant<PercentEncodingOptions>());
+bool DecodePercent(Slice from, std::string *to, bool decode_plus_sign_as_whitespace = false);
 
-} // namespace tile
+}// namespace tile
 
-#endif // TILE_BASE_ENCODING_PERCENT_H
+#endif// TILE_BASE_ENCODING_PERCENT_H

tile/base/encoding/percent_test.cc

@@ -6,103 +6,97 @@
 
 namespace tile {
 
-TEST(PercentEncoding, Emca262) {
-  // Shamelessly copied from:
-  //
-  // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/encodeURIComponent
-  Slice set1 = ";,/?:@&=+$";  // Reserved Characters
-  Slice set2 = "-_.!~*'()";   // Unescaped Characters
-  Slice set3 = "#";           // Number Sign
-  Slice set4 = "ABC abc 123"; // Alphanumeric Characters + Space
+TEST(PercentEncoding, Emca262)
+{
+    // Shamelessly copied from:
+    //
+    // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/encodeURIComponent
+    Slice set1 = ";,/?:@&=+$"; // Reserved Characters
+    Slice set2 = "-_.!~*'()";  // Unescaped Characters
+    Slice set3 = "#";          // Number Sign
+    Slice set4 = "ABC abc 123";// Alphanumeric Characters + Space
 
-  // Reserved chars are escaped.
-  const PercentEncodingOptions ecma262_reversed(PercentEncodingStyle::Ecma262,
-                                                true);
+    // Reserved chars are escaped.
+    const PercentEncodingOptions ecma262_reversed(PercentEncodingStyle::Ecma262, true);
 
-  EXPECT_EQ("%3B%2C%2F%3F%3A%40%26%3D%2B%24",
-            EncodePercent(set1, ecma262_reversed));
-  EXPECT_EQ("-_.!~*'()", EncodePercent(set2, ecma262_reversed));
-  EXPECT_EQ("%23", EncodePercent(set3, ecma262_reversed));
-  EXPECT_EQ("ABC%20abc%20123", EncodePercent(set4, ecma262_reversed));
+    EXPECT_EQ("%3B%2C%2F%3F%3A%40%26%3D%2B%24", EncodePercent(set1, ecma262_reversed));
+    EXPECT_EQ("-_.!~*'()", EncodePercent(set2, ecma262_reversed));
+    EXPECT_EQ("%23", EncodePercent(set3, ecma262_reversed));
+    EXPECT_EQ("ABC%20abc%20123", EncodePercent(set4, ecma262_reversed));
 
-  EXPECT_EQ(set1, DecodePercent("%3B%2C%2F%3F%3A%40%26%3D%2B%24"));
-  EXPECT_EQ(set2, DecodePercent("-_.!~*'()"));
-  EXPECT_EQ(set3, DecodePercent("%23"));
-  EXPECT_EQ(set4, DecodePercent("ABC%20abc%20123"));
+    EXPECT_EQ(set1, DecodePercent("%3B%2C%2F%3F%3A%40%26%3D%2B%24"));
+    EXPECT_EQ(set2, DecodePercent("-_.!~*'()"));
+    EXPECT_EQ(set3, DecodePercent("%23"));
+    EXPECT_EQ(set4, DecodePercent("ABC%20abc%20123"));
 
-  // Reserved chars are kept.
-  const PercentEncodingOptions ecma262(PercentEncodingStyle::Ecma262, false);
-  EXPECT_EQ(";,/?:@&=+$", EncodePercent(set1, ecma262));
-  EXPECT_EQ("-_.!~*'()", EncodePercent(set2, ecma262));
-  EXPECT_EQ("#", EncodePercent(set3, ecma262));
-  EXPECT_EQ("ABC%20abc%20123", EncodePercent(set4, ecma262));
+    // Reserved chars are kept.
+    const PercentEncodingOptions ecma262(PercentEncodingStyle::Ecma262, false);
+    EXPECT_EQ(";,/?:@&=+$", EncodePercent(set1, ecma262));
+    EXPECT_EQ("-_.!~*'()", EncodePercent(set2, ecma262));
+    EXPECT_EQ("#", EncodePercent(set3, ecma262));
+    EXPECT_EQ("ABC%20abc%20123", EncodePercent(set4, ecma262));
 
-  EXPECT_EQ(set1, DecodePercent(";,/?:@&=+$"));
-  EXPECT_EQ(set2, DecodePercent("-_.!~*'()"));
-  EXPECT_EQ(set3, DecodePercent("#"));
-  EXPECT_EQ(set4, DecodePercent("ABC%20abc%20123"));
+    EXPECT_EQ(set1, DecodePercent(";,/?:@&=+$"));
+    EXPECT_EQ(set2, DecodePercent("-_.!~*'()"));
+    EXPECT_EQ(set3, DecodePercent("#"));
+    EXPECT_EQ(set4, DecodePercent("ABC%20abc%20123"));
 }
 
-TEST(PercentEncoding, Rfc3986) {
-  Slice str = "_-,;:!?.'()[]@*/&#+=~$ABC abc 123";
+TEST(PercentEncoding, Rfc3986)
+{
+    Slice str = "_-,;:!?.'()[]@*/&#+=~$ABC abc 123";
 
-  const PercentEncodingOptions rfc3986_reversed(PercentEncodingStyle::Rfc3986,
-                                                true);
-  const PercentEncodingOptions rfc3986(PercentEncodingStyle::Rfc3986, false);
-  EXPECT_EQ(
-      "_-%2C%3B%3A%21%3F.%27%28%29%5B%5D%40%2A%2F%26%23%2B%3D~%24ABC%20abc%"
-      "20123",
-      EncodePercent(str, rfc3986_reversed));
-  EXPECT_EQ("_-,;:!?.'()[]@*/&#+=~$ABC%20abc%20123",
-            EncodePercent(str, rfc3986));
-  EXPECT_EQ(str,
-            DecodePercent("_-%2C%3B%3A%21%3F.%27%28%29%5B%5D%40%2A%2F%26%23%"
-                          "2B%3D~%24ABC%20abc%20123"));
-  EXPECT_EQ(str, DecodePercent("_-,;:!?.'()[]@*/&#+=~$ABC%20abc%20123"));
+    const PercentEncodingOptions rfc3986_reversed(PercentEncodingStyle::Rfc3986, true);
+    const PercentEncodingOptions rfc3986(PercentEncodingStyle::Rfc3986, false);
+    EXPECT_EQ("_-%2C%3B%3A%21%3F.%27%28%29%5B%5D%40%2A%2F%26%23%2B%3D~%24ABC%20abc%"
+              "20123",
+              EncodePercent(str, rfc3986_reversed));
+    EXPECT_EQ("_-,;:!?.'()[]@*/&#+=~$ABC%20abc%20123", EncodePercent(str, rfc3986));
+    EXPECT_EQ(str,
+              DecodePercent("_-%2C%3B%3A%21%3F.%27%28%29%5B%5D%40%2A%2F%26%23%"
+                            "2B%3D~%24ABC%20abc%20123"));
+    EXPECT_EQ(str, DecodePercent("_-,;:!?.'()[]@*/&#+=~$ABC%20abc%20123"));
 }
 
-TEST(PercentEncoding, Rfc5987) {
-  // `encodeRFC5987ValueChars from MDN does not seems quite right (in that it
-  // does escape `#` `$` ..., which is not required.):
-  //
-  // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/encodeURIComponent
-  //
-  // auto encode_rfc5987_value_chars = [](Slice str) {
-  //   auto result =
-  //       EncodePercent(str, PercentEncodingOptions{.style =
-  //       PercentEncodingStyle::Ecma262});
-  //   result = Replace(result, "'", "%" + EncodeHex("'"));
-  //   result = Replace(result, "(", "%" + EncodeHex("("));
-  //   result = Replace(result, ")", "%" + EncodeHex(")"));
-  //   result = Replace(result, "*", "%" + EncodeHex("*"));
-  //   result = Replace(result, "%7C", "|");
-  //   result = Replace(result, "%60", "`");
-  //   result = Replace(result, "%5E", "^");
-  //   return result;
-  // };
-  //
-  // EXPECT_EQ(
-  //     encode_rfc5987_value_chars(str),
-  //     EncodePercent(str, PercentEncodingOptions{.style =
-  //     PercentEncodingStyle::Rfc5987}));
+TEST(PercentEncoding, Rfc5987)
+{
+    // `encodeRFC5987ValueChars from MDN does not seems quite right (in that it
+    // does escape `#` `$` ..., which is not required.):
+    //
+    // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/encodeURIComponent
+    //
+    // auto encode_rfc5987_value_chars = [](Slice str) {
+    //   auto result =
+    //       EncodePercent(str, PercentEncodingOptions{.style =
+    //       PercentEncodingStyle::Ecma262});
+    //   result = Replace(result, "'", "%" + EncodeHex("'"));
+    //   result = Replace(result, "(", "%" + EncodeHex("("));
+    //   result = Replace(result, ")", "%" + EncodeHex(")"));
+    //   result = Replace(result, "*", "%" + EncodeHex("*"));
+    //   result = Replace(result, "%7C", "|");
+    //   result = Replace(result, "%60", "`");
+    //   result = Replace(result, "%5E", "^");
+    //   return result;
+    // };
+    //
+    // EXPECT_EQ(
+    //     encode_rfc5987_value_chars(str),
+    //     EncodePercent(str, PercentEncodingOptions{.style =
+    //     PercentEncodingStyle::Rfc5987}));
 
-  const PercentEncodingOptions rfc5987(PercentEncodingStyle::Rfc5987, false);
-  const PercentEncodingOptions rfc5987_reversed(PercentEncodingStyle::Rfc5987,
-                                                true);
+    const PercentEncodingOptions rfc5987(PercentEncodingStyle::Rfc5987, false);
+    const PercentEncodingOptions rfc5987_reversed(PercentEncodingStyle::Rfc5987, true);
 
-  Slice str = "!123'-!#$&()*,./:;?@[]^_`|~+=ABC abc";
+    Slice str = "!123'-!#$&()*,./:;?@[]^_`|~+=ABC abc";
 
-  EXPECT_EQ("!123%27-!#$&%28%29%2A%2C.%2F%3A%3B%3F%40%5B%5D^_`|~+%3DABC%20abc",
-            EncodePercent(str, rfc5987));
-  EXPECT_EQ(
-      str,
-      DecodePercent(
-          "!123%27-!#$&%28%29%2A%2C.%2F%3A%3B%3F%40%5B%5D^_`|~+%3DABC%20abc"));
+    EXPECT_EQ("!123%27-!#$&%28%29%2A%2C.%2F%3A%3B%3F%40%5B%5D^_`|~+%3DABC%20abc", EncodePercent(str, rfc5987));
+    EXPECT_EQ(str, DecodePercent("!123%27-!#$&%28%29%2A%2C.%2F%3A%3B%3F%40%5B%5D^_`|~+%3DABC%20abc"));
 }
 
-TEST(PercentEncoding, DecodePlusSignAsWhitespace) {
-  EXPECT_EQ("a+b", DecodePercent("a+b"));
-  EXPECT_EQ("a b", DecodePercent("a+b", true));
+TEST(PercentEncoding, DecodePlusSignAsWhitespace)
+{
+    EXPECT_EQ("a+b", DecodePercent("a+b"));
+    EXPECT_EQ("a b", DecodePercent("a+b", true));
 }
 
-} // namespace tile
+}// namespace tile

tile/base/encoding_benchmark.cc

@@ -7,77 +7,90 @@
 
 namespace tile {
 
-void Benchmark_Base64Encode(benchmark::State &state) {
-  std::string random_str;
-  std::string out;
-  while (state.KeepRunning()) {
-    state.PauseTiming();
-    testing::RandomString(&random_str);
-    state.ResumeTiming();
+void
+Benchmark_Base64Encode(benchmark::State &state)
+{
+    std::string random_str;
+    std::string out;
+    while (state.KeepRunning()) {
+        state.PauseTiming();
+        testing::RandomString(&random_str);
+        state.ResumeTiming();
 
-    EncodeBase64(random_str, &out);
-  }
-}
-void Benchmark_Base64Decode(benchmark::State &state) {
-  std::string random_str;
-  std::string base64;
-  std::string plain_text;
-  while (state.KeepRunning()) {
-    state.PauseTiming();
-    testing::RandomString(&random_str);
-    EncodeBase64(random_str, &base64);
-    state.ResumeTiming();
-
-    DecodeBase64(base64, &plain_text);
-  }
+        EncodeBase64(random_str, &out);
+    }
 }
 
-void Benchmark_PercentEncode(benchmark::State &state) {
-  std::string random_str;
-  std::string out;
-  while (state.KeepRunning()) {
-    state.PauseTiming();
-    testing::RandomString(&random_str);
-    state.ResumeTiming();
-    EncodeBase64(random_str, &out);
-  }
+void
+Benchmark_Base64Decode(benchmark::State &state)
+{
+    std::string random_str;
+    std::string base64;
+    std::string plain_text;
+    while (state.KeepRunning()) {
+        state.PauseTiming();
+        testing::RandomString(&random_str);
+        EncodeBase64(random_str, &base64);
+        state.ResumeTiming();
+
+        DecodeBase64(base64, &plain_text);
+    }
 }
 
-void Benchmark_PercentDecode(benchmark::State &state) {
-  std::string random_str;
-  std::string percent;
-  std::string plain_text;
-  while (state.KeepRunning()) {
-    state.PauseTiming();
-    testing::RandomString(&random_str);
-    EncodePercent(random_str, &percent);
-    state.ResumeTiming();
-    DecodePercent(percent, &plain_text);
-  }
+void
+Benchmark_PercentEncode(benchmark::State &state)
+{
+    std::string random_str;
+    std::string out;
+    while (state.KeepRunning()) {
+        state.PauseTiming();
+        testing::RandomString(&random_str);
+        state.ResumeTiming();
+        EncodeBase64(random_str, &out);
+    }
 }
 
-void Benchmark_HexEncode(benchmark::State &state) {
-  std::string random_str;
-  std::string percent;
-  while (state.KeepRunning()) {
-    state.PauseTiming();
-    testing::RandomString(&random_str);
-    state.ResumeTiming();
-    EncodeHex(random_str, &percent);
-  }
+void
+Benchmark_PercentDecode(benchmark::State &state)
+{
+    std::string random_str;
+    std::string percent;
+    std::string plain_text;
+    while (state.KeepRunning()) {
+        state.PauseTiming();
+        testing::RandomString(&random_str);
+        EncodePercent(random_str, &percent);
+        state.ResumeTiming();
+        DecodePercent(percent, &plain_text);
+    }
 }
 
-void Benchmark_HexDecode(benchmark::State &state) {
-  std::string random_str;
-  std::string percent;
-  std::string plain_text;
-  while (state.KeepRunning()) {
-    state.PauseTiming();
-    testing::RandomString(&random_str);
-    EncodeHex(random_str, &percent);
-    state.ResumeTiming();
-    DecodeHex(percent, &plain_text);
-  }
+void
+Benchmark_HexEncode(benchmark::State &state)
+{
+    std::string random_str;
+    std::string percent;
+    while (state.KeepRunning()) {
+        state.PauseTiming();
+        testing::RandomString(&random_str);
+        state.ResumeTiming();
+        EncodeHex(random_str, &percent);
+    }
+}
+
+void
+Benchmark_HexDecode(benchmark::State &state)
+{
+    std::string random_str;
+    std::string percent;
+    std::string plain_text;
+    while (state.KeepRunning()) {
+        state.PauseTiming();
+        testing::RandomString(&random_str);
+        EncodeHex(random_str, &percent);
+        state.ResumeTiming();
+        DecodeHex(percent, &plain_text);
+    }
 }
 
 BENCHMARK(Benchmark_Base64Encode);
@@ -86,4 +99,4 @@ BENCHMARK(Benchmark_PercentEncode);
 BENCHMARK(Benchmark_PercentDecode);
 BENCHMARK(Benchmark_HexEncode);
 BENCHMARK(Benchmark_HexDecode);
-} // namespace tile
+}// namespace tile

tile/base/enum.h

@@ -6,35 +6,33 @@
 #include "tile/base/internal/meta.h"
 
 namespace tile {
-template <class T, class = enable_if_t<std::is_enum<T>::value>>
-constexpr auto underlying_value(T v) -> typename std::underlying_type<T>::type {
-  return static_cast<typename std::underlying_type<T>::type>(v);
+template<class T, class = enable_if_t<std::is_enum<T>::value>>
+constexpr auto
+underlying_value(T v) -> typename std::underlying_type<T>::type
+{
+    return static_cast<typename std::underlying_type<T>::type>(v);
 }
 
-#define TILE_DEFINE_ENUM_BITMASK_BINARY_OP(Type, Op)                           \
-  constexpr Type operator Op(Type left, Type right) {                          \
-    return static_cast<Type>(::tile::underlying_value(left)                    \
-                                 Op ::tile::underlying_value(right));          \
-  }
-#define TILE_DEFINE_ENUM_BITMASK_UNARY_OP(Type, Op)                            \
-  constexpr Type operator Op(Type v) {                                         \
-    return static_cast<Type>(Op ::tile::underlying_value(v));                  \
-  }
-#define TILE_DEFINE_ENUM_BITMASK_BINARY_ASSIGN_OP(Type, Op)                    \
-  constexpr Type &operator Op(Type & left, Type right) { return left Op right; }
+#define TILE_DEFINE_ENUM_BITMASK_BINARY_OP(Type, Op)                                                                   \
+    constexpr Type operator Op(Type left, Type right)                                                                  \
+    {                                                                                                                  \
+        return static_cast<Type>(::tile::underlying_value(left) Op ::tile::underlying_value(right));                   \
+    }
+#define TILE_DEFINE_ENUM_BITMASK_UNARY_OP(Type, Op)                                                                    \
+    constexpr Type operator Op(Type v) { return static_cast<Type>(Op ::tile::underlying_value(v)); }
+#define TILE_DEFINE_ENUM_BITMASK_BINARY_ASSIGN_OP(Type, Op)                                                            \
+    constexpr Type &operator Op(Type & left, Type right) { return left Op right; }
 
-#define TILE_DEFINE_ENUM_BITMASK_OPS(Type)                                     \
-  TILE_DEFINE_ENUM_BITMASK_BINARY_OP(Type, |)                                  \
-  TILE_DEFINE_ENUM_BITMASK_BINARY_OP(Type, &)                                  \
-  TILE_DEFINE_ENUM_BITMASK_BINARY_OP(Type, ^)                                  \
-  TILE_DEFINE_ENUM_BITMASK_BINARY_ASSIGN_OP(Type, |=)                          \
-  TILE_DEFINE_ENUM_BITMASK_BINARY_ASSIGN_OP(Type, &=)                          \
-  TILE_DEFINE_ENUM_BITMASK_BINARY_ASSIGN_OP(Type, ^=)                          \
-  TILE_DEFINE_ENUM_BITMASK_UNARY_OP(Type, ~)                                   \
-  constexpr bool operator!(Type value) {                                       \
-    return !::tile::underlying_value(value);                                   \
-  }
+#define TILE_DEFINE_ENUM_BITMASK_OPS(Type)                                                                             \
+    TILE_DEFINE_ENUM_BITMASK_BINARY_OP(Type, |)                                                                        \
+    TILE_DEFINE_ENUM_BITMASK_BINARY_OP(Type, &)                                                                        \
+    TILE_DEFINE_ENUM_BITMASK_BINARY_OP(Type, ^)                                                                        \
+    TILE_DEFINE_ENUM_BITMASK_BINARY_ASSIGN_OP(Type, |=)                                                                \
+    TILE_DEFINE_ENUM_BITMASK_BINARY_ASSIGN_OP(Type, &=)                                                                \
+    TILE_DEFINE_ENUM_BITMASK_BINARY_ASSIGN_OP(Type, ^=)                                                                \
+    TILE_DEFINE_ENUM_BITMASK_UNARY_OP(Type, ~)                                                                         \
+    constexpr bool operator!(Type value) { return !::tile::underlying_value(value); }
 
-} // namespace tile
+}// namespace tile
 
-#endif // _TILE_BASE_ENUM_H
+#endif// _TILE_BASE_ENUM_H

tile/base/erased_ptr.h

@@ -12,58 +12,69 @@ namespace tile {
 // RAII wrapper ptr
 class ErasedPtr final {
 public:
-  using Deleter = void (*)(void *);
-  constexpr ErasedPtr(std::nullptr_t = nullptr)
-      : ptr_(nullptr), deleter_(nullptr) {}
-  template <typename T>
-  constexpr ErasedPtr(T *ptr) noexcept
-      : ptr_(ptr), deleter_([](void *ptr) { delete static_cast<T *>(ptr); }) {}
-  template <typename T, typename D>
-  constexpr ErasedPtr(T *ptr, D deleter) noexcept
-      : ptr_(ptr), deleter_(deleter) {}
-  ErasedPtr(ErasedPtr &&ptr) noexcept : ptr_(ptr.ptr_), deleter_(ptr.deleter_) {
-    ptr.ptr_ = nullptr;
-  }
+    using Deleter = void (*)(void *);
 
-  ErasedPtr &operator=(ErasedPtr &&ptr) noexcept {
-    if (TILE_LIKELY(this != &ptr)) {
-      Reset();
+    constexpr ErasedPtr(std::nullptr_t = nullptr) : ptr_(nullptr), deleter_(nullptr) {}
+
+    template<typename T>
+    constexpr ErasedPtr(T *ptr) noexcept
+        : ptr_(ptr),
+          deleter_([](void *ptr) { delete static_cast<T *>(ptr); })
+    {}
+
+    template<typename T, typename D>
+    constexpr ErasedPtr(T *ptr, D deleter) noexcept
+        : ptr_(ptr),
+          deleter_(deleter)
+    {}
+
+    ErasedPtr(ErasedPtr &&ptr) noexcept : ptr_(ptr.ptr_), deleter_(ptr.deleter_) { ptr.ptr_ = nullptr; }
+
+    ErasedPtr &operator=(ErasedPtr &&ptr) noexcept
+    {
+        if (TILE_LIKELY(this != &ptr)) { Reset(); }
+        return *this;
     }
-    return *this;
-  }
 
-  ErasedPtr(const ErasedPtr &) = delete;
-  ErasedPtr &operator=(const ErasedPtr &) = delete;
+    ErasedPtr(const ErasedPtr &)            = delete;
+    ErasedPtr &operator=(const ErasedPtr &) = delete;
 
-  ~ErasedPtr() {
-    if (ptr_) {
-      deleter_(ptr_);
+    ~ErasedPtr()
+    {
+        if (ptr_) { deleter_(ptr_); }
     }
-  }
 
-  constexpr void *Get() const noexcept { return ptr_; }
-  template <typename T> T *UncheckedGet() const noexcept {
-    return static_cast<T *>(ptr_);
-  }
-  constexpr explicit operator bool() const noexcept { return !!ptr_; }
-  void Reset(std::nullptr_t = nullptr) noexcept {
-    if (ptr_) {
-      deleter_(ptr_);
-      ptr_ = nullptr;
+    constexpr void *Get() const noexcept { return ptr_; }
+
+    template<typename T>
+    T *UncheckedGet() const noexcept
+    {
+        return static_cast<T *>(ptr_);
     }
-  }
-  TILE_NODISCARD void *Leak() noexcept {
-    void *rc = nullptr;
-    std::swap(rc, ptr_);
-    return rc;
-  }
 
-  constexpr Deleter GetDeleter() const noexcept { return deleter_; }
+    constexpr explicit operator bool() const noexcept { return !!ptr_; }
+
+    void Reset(std::nullptr_t = nullptr) noexcept
+    {
+        if (ptr_) {
+            deleter_(ptr_);
+            ptr_ = nullptr;
+        }
+    }
+
+    TILE_NODISCARD void *Leak() noexcept
+    {
+        void *rc = nullptr;
+        std::swap(rc, ptr_);
+        return rc;
+    }
+
+    constexpr Deleter GetDeleter() const noexcept { return deleter_; }
 
 private:
-  void *ptr_;
-  Deleter deleter_;
+    void *ptr_;
+    Deleter deleter_;
 };
-} // namespace tile
+}// namespace tile
 
-#endif // _TILE_BASE_ERASED_PTR_H
+#endif// _TILE_BASE_ERASED_PTR_H

tile/base/exposed_var.cc

@@ -8,293 +8,294 @@ namespace tile {
 // namespace exposed_var {
 
 namespace {
-#define CHECK_PATH(path)                                                       \
-  TILE_CHECK((path).size() <= 1 || (path).back() != '/',                       \
-             "Invalid path: [{}].", path);                                     \
-  TILE_CHECK((path).find("//") == tile::Slice::npos, "Invalid path: [{}].",    \
-             path);
+#define CHECK_PATH(path)                                                                                               \
+    TILE_CHECK((path).size() <= 1 || (path).back() != '/', "Invalid path: [{}].", path);                               \
+    TILE_CHECK((path).find("//") == tile::Slice::npos, "Invalid path: [{}].", path);
 
-#define CHECK_RELATIVE_PATH(path)                                              \
-  CHECK_PATH(path);                                                            \
-  TILE_CHECK((path).empty() || (path).front() != '/', "Invalid path: [{}].",   \
-             path);
+#define CHECK_RELATIVE_PATH(path)                                                                                      \
+    CHECK_PATH(path);                                                                                                  \
+    TILE_CHECK((path).empty() || (path).front() != '/', "Invalid path: [{}].", path);
 
-#define CHECK_ABSOLUTE_PATH(path)                                              \
-  CHECK_PATH(path);                                                            \
-  TILE_CHECK((path).empty() || (path).front() == '/', "Invalid path: [{}]",    \
-             path);
+#define CHECK_ABSOLUTE_PATH(path)                                                                                      \
+    CHECK_PATH(path);                                                                                                  \
+    TILE_CHECK((path).empty() || (path).front() == '/', "Invalid path: [{}]", path);
+
+std::pair<Slice, Slice>
+SplitFirstPart(Slice path)
+{
+    auto pos = path.find_first_of('/');
+    if (pos == tile::Slice::npos) {
+        return std::make_pair(path, "");
+    } else {
+        return std::make_pair(path.substr(0, pos), path.substr(pos + 1));
+    }
+}
+
+std::pair<Slice, Slice>
+SplitLastPart(Slice path)
+{
+    auto pos = path.find_last_of('/');
+    if (pos == tile::Slice::npos) { return std::make_pair("", path); }
 
-std::pair<Slice, Slice> SplitFirstPart(Slice path) {
-  auto pos = path.find_first_of('/');
-  if (pos == tile::Slice::npos) {
-    return std::make_pair(path, "");
-  } else {
     return std::make_pair(path.substr(0, pos), path.substr(pos + 1));
-  }
 }
 
-std::pair<Slice, Slice> SplitLastPart(Slice path) {
-  auto pos = path.find_last_of('/');
-  if (pos == tile::Slice::npos) {
-    return std::make_pair("", path);
-  }
+std::string
+JoinPath(Slice a, Slice b)
+{
+    if (EndsWith(b, "/")) { b.RemoveSuffix(1); }
 
-  return std::make_pair(path.substr(0, pos), path.substr(pos + 1));
+    if (EndsWith(a, "/")) { a.RemoveSuffix(1); }
+
+    if (b.empty()) { return a.ToString(); }
+    if (a.empty()) { return b.ToString(); }
+
+    return a.ToString() + "/" + b.ToString();
 }
 
-std::string JoinPath(Slice a, Slice b) {
-  if (EndsWith(b, "/")) {
-    b.RemoveSuffix(1);
-  }
-
-  if (EndsWith(a, "/")) {
-    a.RemoveSuffix(1);
-  }
-
-  if (b.empty()) {
-    return a.ToString();
-  }
-  if (a.empty()) {
-    return b.ToString();
-  }
-
-  return a.ToString() + "/" + b.ToString();
+std::string
+SubstituteEscapedSlashForZero(Slice path)
+{
+    TILE_CHECK(path.find('\0') == tile::Slice::npos);
+    return Replace(path, "\\/", '\0');
 }
 
-std::string SubstituteEscapedSlashForZero(Slice path) {
-  TILE_CHECK(path.find('\0') == tile::Slice::npos);
-  return Replace(path, "\\/", '\0');
+std::string
+SubstituteZeroForEscapedSlash(Slice path)
+{
+    return Replace(path, '\0', "\\/");
 }
 
-std::string SubstituteZeroForEscapedSlash(Slice path) {
-  return Replace(path, '\0', "\\/");
+std::string
+UnescapeZeroToPlainSlash(Slice path)
+{
+    return Replace(path, '\0', '/');
 }
 
-std::string UnescapeZeroToPlainSlash(Slice path) {
-  return Replace(path, '\0', '/');
-}
-
-} // namespace
+}// namespace
 
 // } // namespace exposed_var
 ExposedVarGroup::Handle
-ExposedVarGroup::Add(Slice rel_path, std::function<Json::Value()> value) {
+ExposedVarGroup::Add(Slice rel_path, std::function<Json::Value()> value)
+{
 
-  auto real_path = SubstituteEscapedSlashForZero(rel_path);
-  CHECK_RELATIVE_PATH(rel_path);
+    auto real_path = SubstituteEscapedSlashForZero(rel_path);
+    CHECK_RELATIVE_PATH(rel_path);
 
-  auto path_and_name = SplitLastPart(real_path);
-  auto name = path_and_name.second.ToString();
+    auto path_and_name = SplitLastPart(real_path);
+    auto name          = path_and_name.second.ToString();
 
-  auto moved_func = tile::MakeMoveOnCopy(value);
-  return CreateUpto(path_and_name.first)
-      ->AddDirect(
-          name,
-          [name, moved_func](Slice expected) -> std::optional<Json::Value> {
+    auto moved_func    = tile::MakeMoveOnCopy(value);
+    return CreateUpto(path_and_name.first)
+        ->AddDirect(name, [name, moved_func](Slice expected) -> std::optional<Json::Value> {
             auto jsv = moved_func.Ref()();
-            if (expected.empty()) {
-              return jsv;
-            }
+            if (expected.empty()) { return jsv; }
 
-            auto real_path = SubstituteEscapedSlashForZero(expected);
+            auto real_path   = SubstituteEscapedSlashForZero(expected);
             Json::Value *ptr = &jsv;
-            auto pieces = Split(real_path, '/');
+            auto pieces      = Split(real_path, '/');
 
             for (auto &&e : pieces) {
-              auto unescaped = UnescapeZeroToPlainSlash({e.data(), e.size()});
-              if (ptr->isObject()) {
-                if (ptr->isMember(unescaped)) {
-                  ptr = &(*ptr)[unescaped];
+                auto unescaped = UnescapeZeroToPlainSlash({e.data(), e.size()});
+                if (ptr->isObject()) {
+                    if (ptr->isMember(unescaped)) {
+                        ptr = &(*ptr)[unescaped];
+                    } else {
+                        return {};
+                    }
+                } else if (ptr->isArray()) {
+                    auto index = TryParse<std::size_t>(unescaped);
+                    if (index && *index < ptr->size()) {
+                        ptr = &(*ptr)[static_cast<Json::ArrayIndex>(*index)];
+                    } else {
+                        return {};
+                    }
                 } else {
-                  return {};
+                    return {};
                 }
-              } else if (ptr->isArray()) {
-                auto index = TryParse<std::size_t>(unescaped);
-                if (index && *index < ptr->size()) {
-                  ptr = &(*ptr)[static_cast<Json::ArrayIndex>(*index)];
-                } else {
-                  return {};
-                }
-              } else {
-                return {};
-              }
             }
 
             return *ptr;
-          });
+        });
 }
 
 ExposedVarGroup::Handle
-ExposedVarGroup::Add(Slice rel_path, ExposedVarDynamicTree *dynamic_tree) {
-  auto real_path = SubstituteEscapedSlashForZero(rel_path);
-  CHECK_RELATIVE_PATH(real_path);
-  auto path_and_name = SplitLastPart(real_path);
-  auto name = path_and_name.second.ToString();
+ExposedVarGroup::Add(Slice rel_path, ExposedVarDynamicTree *dynamic_tree)
+{
+    auto real_path = SubstituteEscapedSlashForZero(rel_path);
+    CHECK_RELATIVE_PATH(real_path);
+    auto path_and_name = SplitLastPart(real_path);
+    auto name          = path_and_name.second.ToString();
 
-  return CreateUpto(path_and_name.first)
-      ->AddDirect(name, [dynamic_tree](Slice inner_path) {
+    return CreateUpto(path_and_name.first)->AddDirect(name, [dynamic_tree](Slice inner_path) {
         return dynamic_tree->TryGet(inner_path);
-      });
+    });
 }
 
-ExposedVarGroup *ExposedVarGroup::FindOrCreate(Slice abs_path) {
-  auto real_path = SubstituteEscapedSlashForZero(abs_path);
-  CHECK_ABSOLUTE_PATH(real_path);
+ExposedVarGroup *
+ExposedVarGroup::FindOrCreate(Slice abs_path)
+{
+    auto real_path = SubstituteEscapedSlashForZero(abs_path);
+    CHECK_ABSOLUTE_PATH(real_path);
 
-  return Root()->CreateUpto(real_path.substr(1));
+    return Root()->CreateUpto(real_path.substr(1));
 }
-std::optional<Json::Value> ExposedVarGroup::TryGet(Slice abs_path) {
-  auto real_path = SubstituteEscapedSlashForZero(abs_path);
-  TILE_CHECK(!real_path.empty());
-  CHECK_ABSOLUTE_PATH(real_path);
 
-  if (real_path == "/") {
-    return Root()->Dump();
-  }
+std::optional<Json::Value>
+ExposedVarGroup::TryGet(Slice abs_path)
+{
+    auto real_path = SubstituteEscapedSlashForZero(abs_path);
+    TILE_CHECK(!real_path.empty());
+    CHECK_ABSOLUTE_PATH(real_path);
 
-  Slice left_path;
-  auto rel_path = real_path.substr(1);
-  auto parent = Root()->FindLowest(rel_path, &left_path);
+    if (real_path == "/") { return Root()->Dump(); }
 
-  auto name_and_rest = SplitFirstPart(left_path);
-  if (name_and_rest.first.empty()) {
-    return parent->Dump();
-  }
+    Slice left_path;
+    auto rel_path      = real_path.substr(1);
+    auto parent        = Root()->FindLowest(rel_path, &left_path);
 
-  auto s = name_and_rest.first.ToString();
-  std::lock_guard<std::mutex> lk(parent->lock_);
-  auto iter = parent->leaves_.find(s);
-  if (iter != parent->leaves_.end()) {
-    return iter->second(SubstituteZeroForEscapedSlash(name_and_rest.second));
-  } else {
-    auto iter = parent->nodes_.find(s);
-    if (iter != parent->nodes_.end()) {
-      return iter->second->Dump();
+    auto name_and_rest = SplitFirstPart(left_path);
+    if (name_and_rest.first.empty()) { return parent->Dump(); }
+
+    auto s = name_and_rest.first.ToString();
+    std::lock_guard<std::mutex> lk(parent->lock_);
+    auto iter = parent->leaves_.find(s);
+    if (iter != parent->leaves_.end()) {
+        return iter->second(SubstituteZeroForEscapedSlash(name_and_rest.second));
     } else {
-      return {};
+        auto iter = parent->nodes_.find(s);
+        if (iter != parent->nodes_.end()) {
+            return iter->second->Dump();
+        } else {
+            return {};
+        }
     }
-  }
 }
 
-ExposedVarGroup::ExposedVarGroup(std::string abs_path)
-    : abs_path_(std::move(abs_path)) {
-  CHECK_ABSOLUTE_PATH(abs_path);
+ExposedVarGroup::ExposedVarGroup(std::string abs_path) : abs_path_(std::move(abs_path))
+{
+    CHECK_ABSOLUTE_PATH(abs_path);
 }
 
-ExposedVarGroup *ExposedVarGroup::Root() {
-  static ExposedVarGroup evg("/");
-  return &evg;
+ExposedVarGroup *
+ExposedVarGroup::Root()
+{
+    static ExposedVarGroup evg("/");
+    return &evg;
 }
-const std::string &ExposedVarGroup::AbsolutePath() const { return abs_path_; }
 
-ExposedVarGroup *ExposedVarGroup::FindLowest(Slice rel_path, Slice *left) {
-  CHECK_RELATIVE_PATH(rel_path);
-  auto current = this;
+const std::string &
+ExposedVarGroup::AbsolutePath() const
+{
+    return abs_path_;
+}
 
-  while (!rel_path.empty()) {
-    auto name_and_rest = SplitFirstPart(rel_path);
+ExposedVarGroup *
+ExposedVarGroup::FindLowest(Slice rel_path, Slice *left)
+{
+    CHECK_RELATIVE_PATH(rel_path);
+    auto current = this;
 
-    std::lock_guard<std::mutex> lk(current->lock_);
-    auto iter = current->nodes_.find(name_and_rest.first.ToString());
-    if (iter == current->nodes_.end()) {
-      break;
-    } else {
-      current = &*iter->second;
+    while (!rel_path.empty()) {
+        auto name_and_rest = SplitFirstPart(rel_path);
+
+        std::lock_guard<std::mutex> lk(current->lock_);
+        auto iter = current->nodes_.find(name_and_rest.first.ToString());
+        if (iter == current->nodes_.end()) {
+            break;
+        } else {
+            current = &*iter->second;
+        }
+
+        rel_path = name_and_rest.second;
     }
 
-    rel_path = name_and_rest.second;
-  }
-
-  if (left) {
-    *left = rel_path;
-  }
-  return current;
+    if (left) { *left = rel_path; }
+    return current;
 }
 
-ExposedVarGroup *ExposedVarGroup::CreateUpto(Slice rel_path) {
-  CHECK_RELATIVE_PATH(rel_path);
+ExposedVarGroup *
+ExposedVarGroup::CreateUpto(Slice rel_path)
+{
+    CHECK_RELATIVE_PATH(rel_path);
 
-  Slice left_path;
-  auto current = FindLowest(rel_path, &left_path);
+    Slice left_path;
+    auto current = FindLowest(rel_path, &left_path);
 
-  auto pieces = Split(left_path, '/');
+    auto pieces  = Split(left_path, '/');
 
-  for (auto &&e : pieces) {
-    auto s = e.ToString();
+    for (auto &&e : pieces) {
+        auto s = e.ToString();
 
-    std::lock_guard<std::mutex> lk(current->lock_);
-    auto p = JoinPath(current->AbsolutePath(), s);
+        std::lock_guard<std::mutex> lk(current->lock_);
+        auto p = JoinPath(current->AbsolutePath(), s);
 
-    TILE_CHECK(
-        current->leaves_.find(s) == current->leaves_.end(),
-        "Path [{}] has already been used: A value is registered at [{}].",
-        rel_path, p);
+        TILE_CHECK(current->leaves_.find(s) == current->leaves_.end(),
+                   "Path [{}] has already been used: A value is registered at [{}].", rel_path, p);
 
-    TILE_CHECK(current->nodes_.find(s) == current->nodes_.end());
-    auto evg = std::unique_ptr<ExposedVarGroup>(new ExposedVarGroup(p));
-    current->nodes_[s] = std::move(evg);
-    current = &*(current->nodes_[s]);
-  }
+        TILE_CHECK(current->nodes_.find(s) == current->nodes_.end());
+        auto evg           = std::unique_ptr<ExposedVarGroup>(new ExposedVarGroup(p));
+        current->nodes_[s] = std::move(evg);
+        current            = &*(current->nodes_[s]);
+    }
 
-  TILE_CHECK(EndsWith(current->AbsolutePath(), rel_path), "[{}] vs [{}]",
-             current->AbsolutePath(), rel_path);
-  return current;
+    TILE_CHECK(EndsWith(current->AbsolutePath(), rel_path), "[{}] vs [{}]", current->AbsolutePath(), rel_path);
+    return current;
 }
 
-ExposedVarGroup::Handle ExposedVarGroup::AddDirect(Slice name, Getter value) {
-  auto s = name.ToString();
-  std::lock_guard<std::mutex> lk(lock_);
-
-  TILE_CHECK(leaves_.find(s) == leaves_.end(),
-             "Value [{}] has already been registered at [{}].", name,
-             AbsolutePath());
-  TILE_CHECK(nodes_.find(s) == nodes_.end(), "Path [{}] has already been used.",
-             JoinPath(AbsolutePath(), name));
-  leaves_[s] = std::move(value);
-
-  return Deferred([this, s] {
+ExposedVarGroup::Handle
+ExposedVarGroup::AddDirect(Slice name, Getter value)
+{
+    auto s = name.ToString();
     std::lock_guard<std::mutex> lk(lock_);
-    TILE_CHECK_EQ(leaves_.erase(s), 1);
-  });
+
+    TILE_CHECK(leaves_.find(s) == leaves_.end(), "Value [{}] has already been registered at [{}].", name,
+               AbsolutePath());
+    TILE_CHECK(nodes_.find(s) == nodes_.end(), "Path [{}] has already been used.", JoinPath(AbsolutePath(), name));
+    leaves_[s] = std::move(value);
+
+    return Deferred([this, s] {
+        std::lock_guard<std::mutex> lk(lock_);
+        TILE_CHECK_EQ(leaves_.erase(s), 1);
+    });
 }
 
-Json::Value ExposedVarGroup::Dump() const {
-  std::lock_guard<std::mutex> lk(lock_);
-  Json::Value jsv;
-  for (auto &&node : nodes_) {
-    jsv[UnescapeZeroToPlainSlash(node.first)] = node.second->Dump();
-  }
+Json::Value
+ExposedVarGroup::Dump() const
+{
+    std::lock_guard<std::mutex> lk(lock_);
+    Json::Value jsv;
+    for (auto &&node : nodes_) { jsv[UnescapeZeroToPlainSlash(node.first)] = node.second->Dump(); }
 
-  for (auto &&leave : leaves_) {
-    jsv[UnescapeZeroToPlainSlash(leave.first)] = *leave.second("");
-  }
+    for (auto &&leave : leaves_) { jsv[UnescapeZeroToPlainSlash(leave.first)] = *leave.second(""); }
 
-  return jsv;
+    return jsv;
 }
 
-ExposedVarDynamicTree::ExposedVarDynamicTree(
-    Slice rel_path, std::function<Json::Value()> getter,
-    ExposedVarGroup *parent)
-    : getter_(std::move(getter)) {
-  handle_ = parent->Add(rel_path, this);
+ExposedVarDynamicTree::ExposedVarDynamicTree(Slice rel_path,
+                                             std::function<Json::Value()> getter,
+                                             ExposedVarGroup *parent)
+    : getter_(std::move(getter))
+{
+    handle_ = parent->Add(rel_path, this);
 }
 
-std::optional<Json::Value> ExposedVarDynamicTree::TryGet(Slice rel_path) const {
-  auto real_path = SubstituteEscapedSlashForZero(rel_path);
-  auto jsv = getter_();
-  Json::Value *ptr = &jsv;
+std::optional<Json::Value>
+ExposedVarDynamicTree::TryGet(Slice rel_path) const
+{
+    auto real_path   = SubstituteEscapedSlashForZero(rel_path);
+    auto jsv         = getter_();
+    Json::Value *ptr = &jsv;
 
-  auto pieces = Split(real_path, '/');
-  for (auto &&e : pieces) {
-    auto unescaped = UnescapeZeroToPlainSlash({e.data(), e.size()});
-    ptr = &(*ptr)[unescaped];
-  }
+    auto pieces      = Split(real_path, '/');
+    for (auto &&e : pieces) {
+        auto unescaped = UnescapeZeroToPlainSlash({e.data(), e.size()});
+        ptr            = &(*ptr)[unescaped];
+    }
 
-  if (ptr->isNull()) {
-    return {};
-  }
+    if (ptr->isNull()) { return {}; }
 
-  return *ptr;
+    return *ptr;
 }
 
-} // namespace tile
+}// namespace tile

tile/base/exposed_var.h

@@ -15,180 +15,189 @@
 namespace tile {
 namespace exposed_var {
 
-template <typename T>
-auto ToJsonValue(const T &t)
-    -> enable_if_t<std::is_same<T, Json::Value>::value, Json::Value> {
-  return t;
+template<typename T>
+auto
+ToJsonValue(const T &t) -> enable_if_t<std::is_same<T, Json::Value>::value, Json::Value>
+{
+    return t;
 }
 
-template <typename T>
-auto ToJsonValue(const T &t)
-    -> enable_if_t<std::is_integral<T>::value && std::is_unsigned<T>::value,
-                   Json::Value> {
-  return Json::Value(static_cast<Json::UInt64>(t));
+template<typename T>
+auto
+ToJsonValue(const T &t) -> enable_if_t<std::is_integral<T>::value && std::is_unsigned<T>::value, Json::Value>
+{
+    return Json::Value(static_cast<Json::UInt64>(t));
 }
 
-template <typename T>
-auto ToJsonValue(const T &t)
-    -> enable_if_t<std::is_integral<T>::value && !std::is_unsigned<T>::value,
-                   Json::Value> {
-  return Json::Value(static_cast<Json::Int64>(t));
+template<typename T>
+auto
+ToJsonValue(const T &t) -> enable_if_t<std::is_integral<T>::value && !std::is_unsigned<T>::value, Json::Value>
+{
+    return Json::Value(static_cast<Json::Int64>(t));
 }
 
-template <typename T>
-auto ToJsonValue(const T &t)
-    -> enable_if_t<std::is_floating_point<T>::value ||
-                       std::is_same<T, std::string>::value ||
-                       std::is_same<T, const char *>::value ||
-                       std::is_same<T, bool>::value,
-                   Json::Value> {
-  return Json::Value(t);
+template<typename T>
+auto
+ToJsonValue(const T &t) -> enable_if_t<std::is_floating_point<T>::value || std::is_same<T, std::string>::value
+                                           || std::is_same<T, const char *>::value || std::is_same<T, bool>::value,
+                                       Json::Value>
+{
+    return Json::Value(t);
 }
 
-template <typename T>
-auto ToJsonValue(const T &t)
-    -> enable_if_t<
-        !std::is_integral<T>::value && !std::is_floating_point<T>::value &&
-            !std::is_same<T, std::string>::value &&
-            !std::is_same<T, const char *>::value &&
-            !std::is_same<T, bool>::value &&
-            std::is_same<std::string,
-                         decltype(format_as(std::declval<T>()))>::value,
-        Json::Value> {
-  return Json::Value(format_as(t));
+template<typename T>
+auto
+ToJsonValue(const T &t) -> enable_if_t<!std::is_integral<T>::value && !std::is_floating_point<T>::value
+                                           && !std::is_same<T, std::string>::value
+                                           && !std::is_same<T, const char *>::value && !std::is_same<T, bool>::value
+                                           && std::is_same<std::string, decltype(format_as(std::declval<T>()))>::value,
+                                       Json::Value>
+{
+    return Json::Value(format_as(t));
 }
 
-template <class T> Json::Value ToJsonValue(const std::atomic<T> &v) {
-  return ToJsonValue(v.load(std::memory_order_relaxed));
+template<class T>
+Json::Value
+ToJsonValue(const std::atomic<T> &v)
+{
+    return ToJsonValue(v.load(std::memory_order_relaxed));
 }
-} // namespace exposed_var
+}// namespace exposed_var
 
 class ExposedVarDynamicTree;
 
 class ExposedVarGroup {
 public:
-  using Handle = Deferred;
+    using Handle = Deferred;
 
-  Handle Add(Slice rel_path, std::function<Json::Value()> value);
-  Handle Add(Slice rel_path, ExposedVarDynamicTree *dyanmic_tree);
-  static ExposedVarGroup *FindOrCreate(Slice abs_path);
-  static std::optional<Json::Value> TryGet(Slice abs_path);
+    Handle Add(Slice rel_path, std::function<Json::Value()> value);
+    Handle Add(Slice rel_path, ExposedVarDynamicTree *dyanmic_tree);
+    static ExposedVarGroup *FindOrCreate(Slice abs_path);
+    static std::optional<Json::Value> TryGet(Slice abs_path);
 
 private:
-  using Getter = std::function<std::optional<Json::Value>(Slice)>;
+    using Getter = std::function<std::optional<Json::Value>(Slice)>;
 
-  explicit ExposedVarGroup(std::string abs_path);
-  const std::string &AbsolutePath() const;
+    explicit ExposedVarGroup(std::string abs_path);
+    const std::string &AbsolutePath() const;
 
-  ExposedVarGroup *FindLowest(Slice rel_path, Slice *left);
-  ExposedVarGroup *CreateUpto(Slice rel_path);
-  Handle AddDirect(Slice name, Getter getter);
-  Json::Value Dump() const;
-  static ExposedVarGroup *Root();
+    ExposedVarGroup *FindLowest(Slice rel_path, Slice *left);
+    ExposedVarGroup *CreateUpto(Slice rel_path);
+    Handle AddDirect(Slice name, Getter getter);
+    Json::Value Dump() const;
+    static ExposedVarGroup *Root();
 
 private:
-  std::string abs_path_;
-  mutable std::mutex lock_;
+    std::string abs_path_;
+    mutable std::mutex lock_;
 
-  std::unordered_map<std::string, std::unique_ptr<ExposedVarGroup>> nodes_;
-  std::unordered_map<std::string, Getter> leaves_;
+    std::unordered_map<std::string, std::unique_ptr<ExposedVarGroup>> nodes_;
+    std::unordered_map<std::string, Getter> leaves_;
 };
 
-template <typename T> class ExposedVar {
+template<typename T>
+class ExposedVar {
 public:
-  ExposedVar(Slice rel_path) {
-    LinkToParent(rel_path, ExposedVarGroup::FindOrCreate("/"));
-  }
+    ExposedVar(Slice rel_path) { LinkToParent(rel_path, ExposedVarGroup::FindOrCreate("/")); }
 
-  template <typename U>
-  ExposedVar(Slice rel_path, U &&initial_value,
-             ExposedVarGroup *parent = ExposedVarGroup::FindOrCreate("/"))
-      : obj_(std::forward<U>(initial_value)) {
-    LinkToParent(rel_path, parent);
-  }
+    template<typename U>
+    ExposedVar(Slice rel_path, U &&initial_value, ExposedVarGroup *parent = ExposedVarGroup::FindOrCreate("/"))
+        : obj_(std::forward<U>(initial_value))
+    {
+        LinkToParent(rel_path, parent);
+    }
 
-  T *operator->() noexcept { return &obj_; }
-  T &operator*() noexcept { return obj_; }
+    T *operator->() noexcept { return &obj_; }
+
+    T &operator*() noexcept { return obj_; }
 
 private:
-  void LinkToParent(Slice rel_path, ExposedVarGroup *parent) {
-    handle_ = parent->Add(rel_path,
-                          [this] { return exposed_var::ToJsonValue(obj_); });
-  }
+    void LinkToParent(Slice rel_path, ExposedVarGroup *parent)
+    {
+        handle_ = parent->Add(rel_path, [this] { return exposed_var::ToJsonValue(obj_); });
+    }
 
 private:
-  T obj_{};
-  ExposedVarGroup::Handle handle_;
+    T obj_{};
+    ExposedVarGroup::Handle handle_;
 };
 
-template <typename T> class ExposedVarDynamic {
+template<typename T>
+class ExposedVarDynamic {
 public:
-  ExposedVarDynamic(
-      Slice rel_path, std::function<T()> getter,
-      ExposedVarGroup *parent = ExposedVarGroup::FindOrCreate("/"))
-      : getter_(std::move(getter)) {
-    handle_ = parent->Add(
-        rel_path, [this] { return exposed_var::ToJsonValue(getter_()); });
-  }
+    ExposedVarDynamic(Slice rel_path,
+                      std::function<T()> getter,
+                      ExposedVarGroup *parent = ExposedVarGroup::FindOrCreate("/"))
+        : getter_(std::move(getter))
+    {
+        handle_ = parent->Add(rel_path, [this] { return exposed_var::ToJsonValue(getter_()); });
+    }
 
 private:
-  std::function<T()> getter_;
-  ExposedVarGroup::Handle handle_;
+    std::function<T()> getter_;
+    ExposedVarGroup::Handle handle_;
 };
 
 class ExposedVarDynamicTree {
 public:
-  ExposedVarDynamicTree(
-      Slice rel_path, std::function<Json::Value()> getter,
-      ExposedVarGroup *parent = ExposedVarGroup::FindOrCreate("/"));
+    ExposedVarDynamicTree(Slice rel_path,
+                          std::function<Json::Value()> getter,
+                          ExposedVarGroup *parent = ExposedVarGroup::FindOrCreate("/"));
 
-  std::optional<Json::Value> TryGet(Slice rel_path) const;
+    std::optional<Json::Value> TryGet(Slice rel_path) const;
 
 private:
-  std::function<Json::Value()> getter_;
-  ExposedVarGroup::Handle handle_;
+    std::function<Json::Value()> getter_;
+    ExposedVarGroup::Handle handle_;
 };
 
 namespace detail {
-template <typename T> struct IdentityTime {
-  std::uint64_t operator()(const T &val) const {
-    return (ReadSteadyClock() - std::chrono::steady_clock::time_point()) /
-           std::chrono::nanoseconds(1);
-  }
+template<typename T>
+struct IdentityTime {
+    std::uint64_t operator()(const T &val) const
+    {
+        return (ReadSteadyClock() - std::chrono::steady_clock::time_point()) / std::chrono::nanoseconds(1);
+    }
 };
-} // namespace detail
+}// namespace detail
 
-template <typename T, typename F = detail::IdentityTime<T>>
+template<typename T, typename F = detail::IdentityTime<T>>
 class ExposedMetrics {
 public:
-  explicit ExposedMetrics(Slice rel_path) {
-    LinkToParent(rel_path, ExposedVarGroup::FindOrCreate("/"));
-  }
+    explicit ExposedMetrics(Slice rel_path) { LinkToParent(rel_path, ExposedVarGroup::FindOrCreate("/")); }
 
 private:
-  Json::Value ToJsonValue(const T &v) {
-    Json::Value result;
-    std::unordered_map<std::string, T> m = {{"1s", 1}};
-    for (auto &&item : m) {
+    Json::Value ToJsonValue(const T &v)
+    {
+        Json::Value result;
+        std::unordered_map<std::string, T> m = {
+            {"1s", 1}
+        };
+        for (auto &&item : m) {}
+        return result;
     }
-    return result;
-  }
 
-  void LinkToParent(Slice rel_path, ExposedVarGroup *parent) {
-    handle_ = parent->Add(rel_path, [this] { return ToJsonValue(obj_); });
-  }
+    void LinkToParent(Slice rel_path, ExposedVarGroup *parent)
+    {
+        handle_ = parent->Add(rel_path, [this] { return ToJsonValue(obj_); });
+    }
 
 private:
-  T obj_{};
-  ExposedVarGroup::Handle handle_;
+    T obj_{};
+    ExposedVarGroup::Handle handle_;
 };
 
-template <typename T> using ExposedCounter = ExposedVar<T>;
-template <typename T> using ExposedGauge = ExposedVar<T>;
-template <typename T> using ExposedMiner = ExposedVar<T>;
-template <typename T> using ExposedMaxer = ExposedVar<T>;
-template <typename T> using ExposedAverager = ExposedVar<T>;
+template<typename T>
+using ExposedCounter = ExposedVar<T>;
+template<typename T>
+using ExposedGauge = ExposedVar<T>;
+template<typename T>
+using ExposedMiner = ExposedVar<T>;
+template<typename T>
+using ExposedMaxer = ExposedVar<T>;
+template<typename T>
+using ExposedAverager = ExposedVar<T>;
 
-} // namespace tile
+}// namespace tile
 
-#endif // TILE_BASE_EXPOSED_VAR_H
+#endif// TILE_BASE_EXPOSED_VAR_H

tile/base/exposed_var_test.cc

@@ -4,14 +4,19 @@
 #include "json/json.h"
 
 namespace tile {
-ExposedVarGroup *GetFancyGroup() {
-  return ExposedVarGroup::FindOrCreate("/a/b");
+ExposedVarGroup *
+GetFancyGroup()
+{
+    return ExposedVarGroup::FindOrCreate("/a/b");
 }
-Json::Value GetTree() {
-  Json::Value jsv;
-  jsv["dir"]["sub-dir"]["key"] = 5;
-  jsv["key"] = "6";
-  return jsv;
+
+Json::Value
+GetTree()
+{
+    Json::Value jsv;
+    jsv["dir"]["sub-dir"]["key"] = 5;
+    jsv["key"]                   = "6";
+    return jsv;
 }
 
 ExposedVar<int> v1("v1", 5);
@@ -21,18 +26,18 @@ ExposedVar<double> f1("f1", 6.2, ExposedVarGroup::FindOrCreate("/x/y/z"));
 auto GreatGroup = ExposedVarGroup::FindOrCreate("/a/b");
 
 // `/a/b/ds1`
-ExposedVarDynamic<std::string>
-    ds1("ds1", [] { return "test_str"; }, GetFancyGroup());
+ExposedVarDynamic<std::string> ds1("ds1", [] { return "test_str"; }, GetFancyGroup());
 
-TEST(ExposedVar, Mutate) {
-  auto opt = ExposedVarGroup::TryGet("/");
-  ASSERT_TRUE(opt);
-  auto &&jsv = *opt;
-  ASSERT_EQ(5, jsv["v1"].asInt());
-  *v1 = 6;
-  jsv = *ExposedVarGroup::TryGet("/");
-  ASSERT_EQ(6, jsv["v1"].asInt());
-  *v1 = 5;
+TEST(ExposedVar, Mutate)
+{
+    auto opt = ExposedVarGroup::TryGet("/");
+    ASSERT_TRUE(opt);
+    auto &&jsv = *opt;
+    ASSERT_EQ(5, jsv["v1"].asInt());
+    *v1 = 6;
+    jsv = *ExposedVarGroup::TryGet("/");
+    ASSERT_EQ(6, jsv["v1"].asInt());
+    *v1 = 5;
 }
 
-} // namespace tile
+}// namespace tile