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mm3.py
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'''
py3 zero-deps MurMur3 module
'''
import sys as _sys
if (_sys.version_info > (3, 0)):
def xrange( a, b, c ):
return range( a, b, c )
def xencode(x) -> bytearray:
if isinstance(x, bytes) or isinstance(x, bytearray):
return x
else:
return x.encode()
else:
def xencode(x):
return x
del _sys
def hash( key : bytearray, seed = 0x0 ) -> int:
''' 32bit hash '''
key = bytearray( xencode(key) )
def fmix( h ):
h ^= h >> 16
h = ( h * 0x85ebca6b ) & 0xFFFFFFFF
h ^= h >> 13
h = ( h * 0xc2b2ae35 ) & 0xFFFFFFFF
h ^= h >> 16
return h
length = len( key )
nblocks = int( length / 4 )
h1 = seed
c1 = 0xcc9e2d51
c2 = 0x1b873593
# body
for block_start in xrange( 0, nblocks * 4, 4 ):
# ??? big endian?
k1 = key[ block_start + 3 ] << 24 | \
key[ block_start + 2 ] << 16 | \
key[ block_start + 1 ] << 8 | \
key[ block_start + 0 ]
k1 = ( c1 * k1 ) & 0xFFFFFFFF
k1 = ( k1 << 15 | k1 >> 17 ) & 0xFFFFFFFF # inlined ROTL32
k1 = ( c2 * k1 ) & 0xFFFFFFFF
h1 ^= k1
h1 = ( h1 << 13 | h1 >> 19 ) & 0xFFFFFFFF # inlined ROTL32
h1 = ( h1 * 5 + 0xe6546b64 ) & 0xFFFFFFFF
# tail
tail_index = nblocks * 4
k1 = 0
tail_size = length & 3
if tail_size >= 3:
k1 ^= key[ tail_index + 2 ] << 16
if tail_size >= 2:
k1 ^= key[ tail_index + 1 ] << 8
if tail_size >= 1:
k1 ^= key[ tail_index + 0 ]
if tail_size > 0:
k1 = ( k1 * c1 ) & 0xFFFFFFFF
k1 = ( k1 << 15 | k1 >> 17 ) & 0xFFFFFFFF # inlined ROTL32
k1 = ( k1 * c2 ) & 0xFFFFFFFF
h1 ^= k1
#finalization
unsigned_val = fmix( h1 ^ length )
if unsigned_val & 0x80000000 == 0:
return unsigned_val
else:
return -( (unsigned_val ^ 0xFFFFFFFF) + 1 )
def hash128( key: bytearray, seed = 0x0, x64arch : bool = True ) -> int:
''' 128bit hash. '''
def hash128_x64( key: bytearray, seed ) -> int:
''' 128bit hash @ x64 '''
def fmix( k ):
k ^= k >> 33
k = ( k * 0xff51afd7ed558ccd ) & 0xFFFFFFFFFFFFFFFF
k ^= k >> 33
k = ( k * 0xc4ceb9fe1a85ec53 ) & 0xFFFFFFFFFFFFFFFF
k ^= k >> 33
return k
length = len( key )
nblocks = int( length / 16 )
h1 = seed
h2 = seed
c1 = 0x87c37b91114253d5
c2 = 0x4cf5ad432745937f
#body
for block_start in xrange( 0, nblocks * 8, 8 ):
# ??? big endian?
k1 = key[ 2 * block_start + 7 ] << 56 | \
key[ 2 * block_start + 6 ] << 48 | \
key[ 2 * block_start + 5 ] << 40 | \
key[ 2 * block_start + 4 ] << 32 | \
key[ 2 * block_start + 3 ] << 24 | \
key[ 2 * block_start + 2 ] << 16 | \
key[ 2 * block_start + 1 ] << 8 | \
key[ 2 * block_start + 0 ]
k2 = key[ 2 * block_start + 15 ] << 56 | \
key[ 2 * block_start + 14 ] << 48 | \
key[ 2 * block_start + 13 ] << 40 | \
key[ 2 * block_start + 12 ] << 32 | \
key[ 2 * block_start + 11 ] << 24 | \
key[ 2 * block_start + 10 ] << 16 | \
key[ 2 * block_start + 9 ] << 8 | \
key[ 2 * block_start + 8 ]
k1 = ( c1 * k1 ) & 0xFFFFFFFFFFFFFFFF
k1 = ( k1 << 31 | k1 >> 33 ) & 0xFFFFFFFFFFFFFFFF # inlined ROTL64
k1 = ( c2 * k1 ) & 0xFFFFFFFFFFFFFFFF
h1 ^= k1
h1 = ( h1 << 27 | h1 >> 37 ) & 0xFFFFFFFFFFFFFFFF # inlined ROTL64
h1 = ( h1 + h2 ) & 0xFFFFFFFFFFFFFFFF
h1 = ( h1 * 5 + 0x52dce729 ) & 0xFFFFFFFFFFFFFFFF
k2 = ( c2 * k2 ) & 0xFFFFFFFFFFFFFFFF
k2 = ( k2 << 33 | k2 >> 31 ) & 0xFFFFFFFFFFFFFFFF # inlined ROTL64
k2 = ( c1 * k2 ) & 0xFFFFFFFFFFFFFFFF
h2 ^= k2
h2 = ( h2 << 31 | h2 >> 33 ) & 0xFFFFFFFFFFFFFFFF # inlined ROTL64
h2 = ( h1 + h2 ) & 0xFFFFFFFFFFFFFFFF
h2 = ( h2 * 5 + 0x38495ab5 ) & 0xFFFFFFFFFFFFFFFF
#tail
tail_index = nblocks * 16
k1 = 0
k2 = 0
tail_size = length & 15
if tail_size >= 15:
k2 ^= key[ tail_index + 14 ] << 48
if tail_size >= 14:
k2 ^= key[ tail_index + 13 ] << 40
if tail_size >= 13:
k2 ^= key[ tail_index + 12 ] << 32
if tail_size >= 12:
k2 ^= key[ tail_index + 11 ] << 24
if tail_size >= 11:
k2 ^= key[ tail_index + 10 ] << 16
if tail_size >= 10:
k2 ^= key[ tail_index + 9 ] << 8
if tail_size >= 9:
k2 ^= key[ tail_index + 8 ]
if tail_size > 8:
k2 = ( k2 * c2 ) & 0xFFFFFFFFFFFFFFFF
k2 = ( k2 << 33 | k2 >> 31 ) & 0xFFFFFFFFFFFFFFFF # inlined ROTL64
k2 = ( k2 * c1 ) & 0xFFFFFFFFFFFFFFFF
h2 ^= k2
if tail_size >= 8:
k1 ^= key[ tail_index + 7 ] << 56
if tail_size >= 7:
k1 ^= key[ tail_index + 6 ] << 48
if tail_size >= 6:
k1 ^= key[ tail_index + 5 ] << 40
if tail_size >= 5:
k1 ^= key[ tail_index + 4 ] << 32
if tail_size >= 4:
k1 ^= key[ tail_index + 3 ] << 24
if tail_size >= 3:
k1 ^= key[ tail_index + 2 ] << 16
if tail_size >= 2:
k1 ^= key[ tail_index + 1 ] << 8
if tail_size >= 1:
k1 ^= key[ tail_index + 0 ]
if tail_size > 0:
k1 = ( k1 * c1 ) & 0xFFFFFFFFFFFFFFFF
k1 = ( k1 << 31 | k1 >> 33 ) & 0xFFFFFFFFFFFFFFFF # inlined ROTL64
k1 = ( k1 * c2 ) & 0xFFFFFFFFFFFFFFFF
h1 ^= k1
#finalization
h1 ^= length
h2 ^= length
h1 = ( h1 + h2 ) & 0xFFFFFFFFFFFFFFFF
h2 = ( h1 + h2 ) & 0xFFFFFFFFFFFFFFFF
h1 = fmix( h1 )
h2 = fmix( h2 )
h1 = ( h1 + h2 ) & 0xFFFFFFFFFFFFFFFF
h2 = ( h1 + h2 ) & 0xFFFFFFFFFFFFFFFF
return ( h2 << 64 | h1 )
def hash128_x32( key: bytearray, seed ) -> int:
''' 128bit hash @ x32 '''
def fmix( h ):
h ^= h >> 16
h = ( h * 0x85ebca6b ) & 0xFFFFFFFF
h ^= h >> 13
h = ( h * 0xc2b2ae35 ) & 0xFFFFFFFF
h ^= h >> 16
return h
length = len( key )
nblocks = int( length / 16 )
h1 = seed
h2 = seed
h3 = seed
h4 = seed
c1 = 0x239b961b
c2 = 0xab0e9789
c3 = 0x38b34ae5
c4 = 0xa1e38b93
#body
for block_start in xrange( 0, nblocks * 16, 16 ):
k1 = key[ block_start + 3 ] << 24 | \
key[ block_start + 2 ] << 16 | \
key[ block_start + 1 ] << 8 | \
key[ block_start + 0 ]
k2 = key[ block_start + 7 ] << 24 | \
key[ block_start + 6 ] << 16 | \
key[ block_start + 5 ] << 8 | \
key[ block_start + 4 ]
k3 = key[ block_start + 11 ] << 24 | \
key[ block_start + 10 ] << 16 | \
key[ block_start + 9 ] << 8 | \
key[ block_start + 8 ]
k4 = key[ block_start + 15 ] << 24 | \
key[ block_start + 14 ] << 16 | \
key[ block_start + 13 ] << 8 | \
key[ block_start + 12 ]
k1 = ( c1 * k1 ) & 0xFFFFFFFF
k1 = ( k1 << 15 | k1 >> 17 ) & 0xFFFFFFFF # inlined ROTL32
k1 = ( c2 * k1 ) & 0xFFFFFFFF
h1 ^= k1
h1 = ( h1 << 19 | h1 >> 13 ) & 0xFFFFFFFF # inlined ROTL32
h1 = ( h1 + h2 ) & 0xFFFFFFFF
h1 = ( h1 * 5 + 0x561ccd1b ) & 0xFFFFFFFF
k2 = ( c2 * k2 ) & 0xFFFFFFFF
k2 = ( k2 << 16 | k2 >> 16 ) & 0xFFFFFFFF # inlined ROTL32
k2 = ( c3 * k2 ) & 0xFFFFFFFF
h2 ^= k2
h2 = ( h2 << 17 | h2 >> 15 ) & 0xFFFFFFFF # inlined ROTL32
h2 = ( h2 + h3 ) & 0xFFFFFFFF
h2 = ( h2 * 5 + 0x0bcaa747 ) & 0xFFFFFFFF
k3 = ( c3 * k3 ) & 0xFFFFFFFF
k3 = ( k3 << 17 | k3 >> 15 ) & 0xFFFFFFFF # inlined ROTL32
k3 = ( c4 * k3 ) & 0xFFFFFFFF
h3 ^= k3
h3 = ( h3 << 15 | h3 >> 17 ) & 0xFFFFFFFF # inlined ROTL32
h3 = ( h3 + h4 ) & 0xFFFFFFFF
h3 = ( h3 * 5 + 0x96cd1c35 ) & 0xFFFFFFFF
k4 = ( c4 * k4 ) & 0xFFFFFFFF
k4 = ( k4 << 18 | k4 >> 14 ) & 0xFFFFFFFF # inlined ROTL32
k4 = ( c1 * k4 ) & 0xFFFFFFFF
h4 ^= k4
h4 = ( h4 << 13 | h4 >> 19 ) & 0xFFFFFFFF # inlined ROTL32
h4 = ( h1 + h4 ) & 0xFFFFFFFF
h4 = ( h4 * 5 + 0x32ac3b17 ) & 0xFFFFFFFF
#tail
tail_index = nblocks * 16
k1 = 0
k2 = 0
k3 = 0
k4 = 0
tail_size = length & 15
if tail_size >= 15:
k4 ^= key[ tail_index + 14 ] << 16
if tail_size >= 14:
k4 ^= key[ tail_index + 13 ] << 8
if tail_size >= 13:
k4 ^= key[ tail_index + 12 ]
if tail_size > 12:
k4 = ( k4 * c4 ) & 0xFFFFFFFF
k4 = ( k4 << 18 | k4 >> 14 ) & 0xFFFFFFFF # inlined ROTL32
k4 = ( k4 * c1 ) & 0xFFFFFFFF
h4 ^= k4
if tail_size >= 12:
k3 ^= key[ tail_index + 11 ] << 24
if tail_size >= 11:
k3 ^= key[ tail_index + 10 ] << 16
if tail_size >= 10:
k3 ^= key[ tail_index + 9 ] << 8
if tail_size >= 9:
k3 ^= key[ tail_index + 8 ]
if tail_size > 8:
k3 = ( k3 * c3 ) & 0xFFFFFFFF
k3 = ( k3 << 17 | k3 >> 15 ) & 0xFFFFFFFF # inlined ROTL32
k3 = ( k3 * c4 ) & 0xFFFFFFFF
h3 ^= k3
if tail_size >= 8:
k2 ^= key[ tail_index + 7 ] << 24
if tail_size >= 7:
k2 ^= key[ tail_index + 6 ] << 16
if tail_size >= 6:
k2 ^= key[ tail_index + 5 ] << 8
if tail_size >= 5:
k2 ^= key[ tail_index + 4 ]
if tail_size > 4:
k2 = ( k2 * c2 ) & 0xFFFFFFFF
k2 = ( k2 << 16 | k2 >> 16 ) & 0xFFFFFFFF # inlined ROTL32
k2 = ( k2 * c3 ) & 0xFFFFFFFF
h2 ^= k2
if tail_size >= 4:
k1 ^= key[ tail_index + 3 ] << 24
if tail_size >= 3:
k1 ^= key[ tail_index + 2 ] << 16
if tail_size >= 2:
k1 ^= key[ tail_index + 1 ] << 8
if tail_size >= 1:
k1 ^= key[ tail_index + 0 ]
if tail_size > 0:
k1 = ( k1 * c1 ) & 0xFFFFFFFF
k1 = ( k1 << 15 | k1 >> 17 ) & 0xFFFFFFFF # inlined ROTL32
k1 = ( k1 * c2 ) & 0xFFFFFFFF
h1 ^= k1
#finalization
h1 ^= length
h2 ^= length
h3 ^= length
h4 ^= length
h1 = ( h1 + h2 ) & 0xFFFFFFFF
h1 = ( h1 + h3 ) & 0xFFFFFFFF
h1 = ( h1 + h4 ) & 0xFFFFFFFF
h2 = ( h1 + h2 ) & 0xFFFFFFFF
h3 = ( h1 + h3 ) & 0xFFFFFFFF
h4 = ( h1 + h4 ) & 0xFFFFFFFF
h1 = fmix( h1 )
h2 = fmix( h2 )
h3 = fmix( h3 )
h4 = fmix( h4 )
h1 = ( h1 + h2 ) & 0xFFFFFFFF
h1 = ( h1 + h3 ) & 0xFFFFFFFF
h1 = ( h1 + h4 ) & 0xFFFFFFFF
h2 = ( h1 + h2 ) & 0xFFFFFFFF
h3 = ( h1 + h3 ) & 0xFFFFFFFF
h4 = ( h1 + h4 ) & 0xFFFFFFFF
return ( h4 << 96 | h3 << 64 | h2 << 32 | h1 )
key = bytearray( xencode(key) )
if x64arch:
return hash128_x64( key, seed )
else:
return hash128_x32( key, seed )
def hash64( key : bytearray, seed = 0x0, x64arch : bool = True ) -> tuple:
''' 64bit hash '''
hash_128 = hash128( key, seed, x64arch )
unsigned_val1 = hash_128 & 0xFFFFFFFFFFFFFFFF
if unsigned_val1 & 0x8000000000000000 == 0:
signed_val1 = unsigned_val1
else:
signed_val1 = -( (unsigned_val1 ^ 0xFFFFFFFFFFFFFFFF) + 1 )
unsigned_val2 = ( hash_128 >> 64 ) & 0xFFFFFFFFFFFFFFFF
if unsigned_val2 & 0x8000000000000000 == 0:
signed_val2 = unsigned_val2
else:
signed_val2 = -( (unsigned_val2 ^ 0xFFFFFFFFFFFFFFFF) + 1 )
return ( int( signed_val1 ), int( signed_val2 ) )
def hash_bytes( key : bytearray, seed = 0x0, x64arch : bool = True ) -> str:
''' 128bit hash'''
hash_128 = hash128( key, seed, x64arch )
bytestring = ''
for i in xrange(0, 16, 1):
lsbyte = hash_128 & 0xFF
bytestring = bytestring + str( chr( lsbyte ) )
hash_128 = hash_128 >> 8
return bytestring
if __name__ == "__main__":
import argparse
import sys
parser = argparse.ArgumentParser( 'mm3', 'mm3 [options] "string -> hash"' )
parser.add_argument( '--seed', type = int, default = 0 )
parser.add_argument( 'strings', default = [], nargs='+')
opts = parser.parse_args()
for str_to_hash in opts.strings:
sys.stdout.write( '"%s" = %s\n' % ( str_to_hash, xencode(hash_bytes(str_to_hash))))