Clickhouse 3785 Add MurmurHash2

CMakeLists.txt

@@ -283,6 +283,7 @@ include (cmake/find_contrib_lib.cmake)
 find_contrib_lib(cityhash)
 find_contrib_lib(farmhash)
 find_contrib_lib(metrohash)
+find_contrib_lib(murmurhash2)
 find_contrib_lib(btrie)
 find_contrib_lib(double-conversion)
 

contrib/CMakeLists.txt

@@ -45,6 +45,10 @@ if (USE_INTERNAL_UNWIND_LIBRARY)
     add_subdirectory (libunwind)
 endif ()
 
+if (USE_INTERNAL_MURMURHASH2_LIBRARY)
+    add_subdirectory (libmurmurhash2)
+endif ()
+
 if (USE_INTERNAL_ZLIB_LIBRARY)
     add_subdirectory (${INTERNAL_ZLIB_NAME})
     # todo: make pull to Dead2/zlib-ng and remove:

contrib/libmurmurhash2/CMakeLists.txt

@@ -0,0 +1,6 @@
+add_library(murmurhash2
+	src/murmurhash2.cpp
+	include/murmurhash2.h)
+
+target_include_directories (murmurhash2 PUBLIC include)
+target_include_directories (murmurhash2 PUBLIC src)

contrib/libmurmurhash2/LICENSE

@@ -0,0 +1 @@
+MurmurHash2 was written by Austin Appleby, and is placed in the publicdomain. The author hereby disclaims copyright to this source code.

contrib/libmurmurhash2/README

@@ -0,0 +1,6 @@
+Original URL: https://github.com/aappleby/smhasher
+
+version:
+commit  61a0530f28277f2e850bfc39600ce61d02b518de 
+author  aappleby@gmail.com
+date    2016-01-09T06:07:17Z

contrib/libmurmurhash2/include/murmurhash2.h

@@ -0,0 +1,35 @@
+//-----------------------------------------------------------------------------
+// MurmurHash2 was written by Austin Appleby, and is placed in the public
+// domain. The author hereby disclaims copyright to this source code.
+
+#ifndef _MURMURHASH2_H_
+#define _MURMURHASH2_H_
+
+//-----------------------------------------------------------------------------
+// Platform-specific functions and macros
+
+// Microsoft Visual Studio
+
+#if defined(_MSC_VER) && (_MSC_VER < 1600)
+
+typedef unsigned char uint8_t;
+typedef unsigned int uint32_t;
+typedef unsigned __int64 uint64_t;
+
+// Other compilers
+
+#else	// defined(_MSC_VER)
+
+#include <stdint.h>
+
+#endif // !defined(_MSC_VER)
+
+uint32_t MurmurHash2        (const void * key, int len, uint32_t seed);
+uint64_t MurmurHash64A      (const void * key, int len, uint64_t seed);
+uint64_t MurmurHash64B      (const void * key, int len, uint64_t seed);
+uint32_t MurmurHash2A       (const void * key, int len, uint32_t seed);
+uint32_t MurmurHashNeutral2 (const void * key, int len, uint32_t seed);
+uint32_t MurmurHashAligned2 (const void * key, int len, uint32_t seed);
+
+#endif // _MURMURHASH2_H_
+