adding MurmurHash3 library

5 files changed, 377 insertions, 2 deletions

diff --git a/src/mongo/SConscript b/src/mongo/SConscript
index 6a90af2debc..19b510ba80d 100644
--- a/src/mongo/SConscript
+++ b/src/mongo/SConscript
@@ -86,12 +86,12 @@ commonFiles = [ "pch.cpp",
                 "client/model.cpp",
                 "client/syncclusterconnection.cpp",
                 "client/distlock.cpp",
-                "s/shardconnection.cpp" ]
+                "s/shardconnection.cpp"]
 
 commonFiles += env['MONGO_COMMON_FILES']
 
 env.StaticLibrary('mongocommon', commonFiles,
-                  LIBDEPS=['$BUILD_DIR/third_party/pcrecpp'])
+                  LIBDEPS=['$BUILD_DIR/third_party/pcrecpp', '$BUILD_DIR/third_party/murmurhash3/murmurhash3'],)
 
 #mmap stuff
 
diff --git a/src/third_party/SConscript b/src/third_party/SConscript
index 82797c63480..cc45e89e5d0 100644
--- a/src/third_party/SConscript
+++ b/src/third_party/SConscript
@@ -4,6 +4,7 @@ Import( "env has_option" )
 
 env.SConscript( [
         "pcre-${PCRE_VERSION}/SConscript",
+        "murmurhash3/SConscript",
         ] )
 
 if has_option( "use-system-pcre" ) or has_option( "use-system-all" ):
diff --git a/src/third_party/murmurhash3/MurmurHash3.cpp b/src/third_party/murmurhash3/MurmurHash3.cpp
new file mode 100644
index 00000000000..0bf738662ba
--- /dev/null
+++ b/src/third_party/murmurhash3/MurmurHash3.cpp
@@ -0,0 +1,335 @@
+//-----------------------------------------------------------------------------

+// MurmurHash3 was written by Austin Appleby, and is placed in the public

+// domain. The author hereby disclaims copyright to this source code.

+

+// Note - The x86 and x64 versions do _not_ produce the same results, as the

+// algorithms are optimized for their respective platforms. You can still

+// compile and run any of them on any platform, but your performance with the

+// non-native version will be less than optimal.

+

+#include "MurmurHash3.h"

+

+//-----------------------------------------------------------------------------

+// Platform-specific functions and macros

+

+// Microsoft Visual Studio

+

+#if defined(_MSC_VER)

+

+#define FORCE_INLINE	__forceinline

+

+#include <stdlib.h>

+

+#define ROTL32(x,y)	_rotl(x,y)

+#define ROTL64(x,y)	_rotl64(x,y)

+

+#define BIG_CONSTANT(x) (x)

+

+// Other compilers

+

+#else	// defined(_MSC_VER)

+

+#define	FORCE_INLINE __attribute__((always_inline))

+

+inline uint32_t rotl32 ( uint32_t x, int8_t r )

+{

+  return (x << r) | (x >> (32 - r));

+}

+

+inline uint64_t rotl64 ( uint64_t x, int8_t r )

+{

+  return (x << r) | (x >> (64 - r));

+}

+

+#define	ROTL32(x,y)	rotl32(x,y)

+#define ROTL64(x,y)	rotl64(x,y)

+

+#define BIG_CONSTANT(x) (x##LLU)

+

+#endif // !defined(_MSC_VER)

+

+//-----------------------------------------------------------------------------

+// Block read - if your platform needs to do endian-swapping or can only

+// handle aligned reads, do the conversion here

+

+FORCE_INLINE uint32_t getblock ( const uint32_t * p, int i )

+{

+  return p[i];

+}

+

+FORCE_INLINE uint64_t getblock ( const uint64_t * p, int i )

+{

+  return p[i];

+}

+

+//-----------------------------------------------------------------------------

+// Finalization mix - force all bits of a hash block to avalanche

+

+FORCE_INLINE uint32_t fmix ( uint32_t h )

+{

+  h ^= h >> 16;

+  h *= 0x85ebca6b;

+  h ^= h >> 13;

+  h *= 0xc2b2ae35;

+  h ^= h >> 16;

+

+  return h;

+}

+

+//----------

+

+FORCE_INLINE uint64_t fmix ( uint64_t k )

+{

+  k ^= k >> 33;

+  k *= BIG_CONSTANT(0xff51afd7ed558ccd);

+  k ^= k >> 33;

+  k *= BIG_CONSTANT(0xc4ceb9fe1a85ec53);

+  k ^= k >> 33;

+

+  return k;

+}

+

+//-----------------------------------------------------------------------------

+

+void MurmurHash3_x86_32 ( const void * key, int len,

+                          uint32_t seed, void * out )

+{

+  const uint8_t * data = (const uint8_t*)key;

+  const int nblocks = len / 4;

+

+  uint32_t h1 = seed;

+

+  uint32_t c1 = 0xcc9e2d51;

+  uint32_t c2 = 0x1b873593;

+

+  //----------

+  // body

+

+  const uint32_t * blocks = (const uint32_t *)(data + nblocks*4);

+

+  for(int i = -nblocks; i; i++)

+  {

+    uint32_t k1 = getblock(blocks,i);

+

+    k1 *= c1;

+    k1 = ROTL32(k1,15);

+    k1 *= c2;

+    

+    h1 ^= k1;

+    h1 = ROTL32(h1,13); 

+    h1 = h1*5+0xe6546b64;

+  }

+

+  //----------

+  // tail

+

+  const uint8_t * tail = (const uint8_t*)(data + nblocks*4);

+

+  uint32_t k1 = 0;

+

+  switch(len & 3)

+  {

+  case 3: k1 ^= tail[2] << 16;

+  case 2: k1 ^= tail[1] << 8;

+  case 1: k1 ^= tail[0];

+          k1 *= c1; k1 = ROTL32(k1,15); k1 *= c2; h1 ^= k1;

+  };

+

+  //----------

+  // finalization

+

+  h1 ^= len;

+

+  h1 = fmix(h1);

+

+  *(uint32_t*)out = h1;

+} 

+

+//-----------------------------------------------------------------------------

+

+void MurmurHash3_x86_128 ( const void * key, const int len,

+                           uint32_t seed, void * out )

+{

+  const uint8_t * data = (const uint8_t*)key;

+  const int nblocks = len / 16;

+

+  uint32_t h1 = seed;

+  uint32_t h2 = seed;

+  uint32_t h3 = seed;

+  uint32_t h4 = seed;

+

+  uint32_t c1 = 0x239b961b; 

+  uint32_t c2 = 0xab0e9789;

+  uint32_t c3 = 0x38b34ae5; 

+  uint32_t c4 = 0xa1e38b93;

+

+  //----------

+  // body

+

+  const uint32_t * blocks = (const uint32_t *)(data + nblocks*16);

+

+  for(int i = -nblocks; i; i++)

+  {

+    uint32_t k1 = getblock(blocks,i*4+0);

+    uint32_t k2 = getblock(blocks,i*4+1);

+    uint32_t k3 = getblock(blocks,i*4+2);

+    uint32_t k4 = getblock(blocks,i*4+3);

+

+    k1 *= c1; k1  = ROTL32(k1,15); k1 *= c2; h1 ^= k1;

+

+    h1 = ROTL32(h1,19); h1 += h2; h1 = h1*5+0x561ccd1b;

+

+    k2 *= c2; k2  = ROTL32(k2,16); k2 *= c3; h2 ^= k2;

+

+    h2 = ROTL32(h2,17); h2 += h3; h2 = h2*5+0x0bcaa747;

+

+    k3 *= c3; k3  = ROTL32(k3,17); k3 *= c4; h3 ^= k3;

+

+    h3 = ROTL32(h3,15); h3 += h4; h3 = h3*5+0x96cd1c35;

+

+    k4 *= c4; k4  = ROTL32(k4,18); k4 *= c1; h4 ^= k4;

+

+    h4 = ROTL32(h4,13); h4 += h1; h4 = h4*5+0x32ac3b17;

+  }

+

+  //----------

+  // tail

+

+  const uint8_t * tail = (const uint8_t*)(data + nblocks*16);

+

+  uint32_t k1 = 0;

+  uint32_t k2 = 0;

+  uint32_t k3 = 0;

+  uint32_t k4 = 0;

+

+  switch(len & 15)

+  {

+  case 15: k4 ^= tail[14] << 16;

+  case 14: k4 ^= tail[13] << 8;

+  case 13: k4 ^= tail[12] << 0;

+           k4 *= c4; k4  = ROTL32(k4,18); k4 *= c1; h4 ^= k4;

+

+  case 12: k3 ^= tail[11] << 24;

+  case 11: k3 ^= tail[10] << 16;

+  case 10: k3 ^= tail[ 9] << 8;

+  case  9: k3 ^= tail[ 8] << 0;

+           k3 *= c3; k3  = ROTL32(k3,17); k3 *= c4; h3 ^= k3;

+

+  case  8: k2 ^= tail[ 7] << 24;

+  case  7: k2 ^= tail[ 6] << 16;

+  case  6: k2 ^= tail[ 5] << 8;

+  case  5: k2 ^= tail[ 4] << 0;

+           k2 *= c2; k2  = ROTL32(k2,16); k2 *= c3; h2 ^= k2;

+

+  case  4: k1 ^= tail[ 3] << 24;

+  case  3: k1 ^= tail[ 2] << 16;

+  case  2: k1 ^= tail[ 1] << 8;

+  case  1: k1 ^= tail[ 0] << 0;

+           k1 *= c1; k1  = ROTL32(k1,15); k1 *= c2; h1 ^= k1;

+  };

+

+  //----------

+  // finalization

+

+  h1 ^= len; h2 ^= len; h3 ^= len; h4 ^= len;

+

+  h1 += h2; h1 += h3; h1 += h4;

+  h2 += h1; h3 += h1; h4 += h1;

+

+  h1 = fmix(h1);

+  h2 = fmix(h2);

+  h3 = fmix(h3);

+  h4 = fmix(h4);

+

+  h1 += h2; h1 += h3; h1 += h4;

+  h2 += h1; h3 += h1; h4 += h1;

+

+  ((uint32_t*)out)[0] = h1;

+  ((uint32_t*)out)[1] = h2;

+  ((uint32_t*)out)[2] = h3;

+  ((uint32_t*)out)[3] = h4;

+}

+

+//-----------------------------------------------------------------------------

+

+void MurmurHash3_x64_128 ( const void * key, const int len,

+                           const uint32_t seed, void * out )

+{

+  const uint8_t * data = (const uint8_t*)key;

+  const int nblocks = len / 16;

+

+  uint64_t h1 = seed;

+  uint64_t h2 = seed;

+

+  uint64_t c1 = BIG_CONSTANT(0x87c37b91114253d5);

+  uint64_t c2 = BIG_CONSTANT(0x4cf5ad432745937f);

+

+  //----------

+  // body

+

+  const uint64_t * blocks = (const uint64_t *)(data);

+

+  for(int i = 0; i < nblocks; i++)

+  {

+    uint64_t k1 = getblock(blocks,i*2+0);

+    uint64_t k2 = getblock(blocks,i*2+1);

+

+    k1 *= c1; k1  = ROTL64(k1,31); k1 *= c2; h1 ^= k1;

+

+    h1 = ROTL64(h1,27); h1 += h2; h1 = h1*5+0x52dce729;

+

+    k2 *= c2; k2  = ROTL64(k2,33); k2 *= c1; h2 ^= k2;

+

+    h2 = ROTL64(h2,31); h2 += h1; h2 = h2*5+0x38495ab5;

+  }

+

+  //----------

+  // tail

+

+  const uint8_t * tail = (const uint8_t*)(data + nblocks*16);

+

+  uint64_t k1 = 0;

+  uint64_t k2 = 0;

+

+  switch(len & 15)

+  {

+  case 15: k2 ^= uint64_t(tail[14]) << 48;

+  case 14: k2 ^= uint64_t(tail[13]) << 40;

+  case 13: k2 ^= uint64_t(tail[12]) << 32;

+  case 12: k2 ^= uint64_t(tail[11]) << 24;

+  case 11: k2 ^= uint64_t(tail[10]) << 16;

+  case 10: k2 ^= uint64_t(tail[ 9]) << 8;

+  case  9: k2 ^= uint64_t(tail[ 8]) << 0;

+           k2 *= c2; k2  = ROTL64(k2,33); k2 *= c1; h2 ^= k2;

+

+  case  8: k1 ^= uint64_t(tail[ 7]) << 56;

+  case  7: k1 ^= uint64_t(tail[ 6]) << 48;

+  case  6: k1 ^= uint64_t(tail[ 5]) << 40;

+  case  5: k1 ^= uint64_t(tail[ 4]) << 32;

+  case  4: k1 ^= uint64_t(tail[ 3]) << 24;

+  case  3: k1 ^= uint64_t(tail[ 2]) << 16;

+  case  2: k1 ^= uint64_t(tail[ 1]) << 8;

+  case  1: k1 ^= uint64_t(tail[ 0]) << 0;

+           k1 *= c1; k1  = ROTL64(k1,31); k1 *= c2; h1 ^= k1;

+  };

+

+  //----------

+  // finalization

+

+  h1 ^= len; h2 ^= len;

+

+  h1 += h2;

+  h2 += h1;

+

+  h1 = fmix(h1);

+  h2 = fmix(h2);

+

+  h1 += h2;

+  h2 += h1;

+

+  ((uint64_t*)out)[0] = h1;

+  ((uint64_t*)out)[1] = h2;

+}

+

+//-----------------------------------------------------------------------------

+

diff --git a/src/third_party/murmurhash3/MurmurHash3.h b/src/third_party/murmurhash3/MurmurHash3.h
new file mode 100644
index 00000000000..58e98204d28
--- /dev/null
+++ b/src/third_party/murmurhash3/MurmurHash3.h
@@ -0,0 +1,37 @@
+//-----------------------------------------------------------------------------

+// MurmurHash3 was written by Austin Appleby, and is placed in the public

+// domain. The author hereby disclaims copyright to this source code.

+

+#ifndef _MURMURHASH3_H_

+#define _MURMURHASH3_H_

+

+//-----------------------------------------------------------------------------

+// Platform-specific functions and macros

+

+// Microsoft Visual Studio

+

+#if defined(_MSC_VER)

+

+typedef unsigned char uint8_t;

+typedef unsigned long uint32_t;

+typedef unsigned __int64 uint64_t;

+

+// Other compilers

+

+#else	// defined(_MSC_VER)

+

+#include <stdint.h>

+

+#endif // !defined(_MSC_VER)

+

+//-----------------------------------------------------------------------------

+

+void MurmurHash3_x86_32  ( const void * key, int len, uint32_t seed, void * out );

+

+void MurmurHash3_x86_128 ( const void * key, int len, uint32_t seed, void * out );

+

+void MurmurHash3_x64_128 ( const void * key, int len, uint32_t seed, void * out );

+

+//-----------------------------------------------------------------------------

+

+#endif // _MURMURHASH3_H_

diff --git a/src/third_party/murmurhash3/SConscript b/src/third_party/murmurhash3/SConscript
new file mode 100644
index 00000000000..7ef456e90e2
--- /dev/null
+++ b/src/third_party/murmurhash3/SConscript
@@ -0,0 +1,2 @@
+Import("env")
+env.StaticLibrary("murmurhash3", ["MurmurHash3.cpp"])