Support PFor encoding

contrib/CMakeLists.txt

@@ -189,3 +189,5 @@ add_subdirectory(magic_enum)
 add_subdirectory(aws-cmake)
 
 add_subdirectory(simdjson)
+
+add_subdirectory(fastpforlib)

contrib/fastpforlib/CMakeLists.txt

@@ -0,0 +1,13 @@
+if(POLICY CMP0063)
+    cmake_policy(SET CMP0063 NEW)
+endif()
+
+add_library(fastpforlib STATIC bitpacking.cpp)
+
+target_include_directories(fastpforlib PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>)
+set_target_properties(fastpforlib PROPERTIES EXPORT_NAME fastpforlib)
+
+if (TIFLASH_ENABLE_ARCH_HASWELL_SUPPORT)
+    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${TIFLASH_COMPILER_ARCH_HASWELL_FLAG}")
+    set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${TIFLASH_COMPILER_ARCH_HASWELL_FLAG}")
+endif ()

contrib/fastpforlib/LICENSE

@@ -0,0 +1,191 @@
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