Port the Murmur hash functions from Java to C++. This is ironic,
because these functions actually originated in C code, which the
Cassandra guys converted to Java :-)
The Murmur hash is used in Cassandra for several things, including the
bloom filter (which is part of each sstable), and the default
data partitioner (Murmur3Partitioner).
I tested on some example string that all three methods (hash32, hash2_64
and hash3_x64_128) produce exactly the same output in the new C++ code as
they do in the original Java functions. This is important, because we want
the C++ node to be able to run alongside Java nodes, so they have to agree
on the same hash function.
Signed-off-by: Nadav Har'El <nyh@cloudius-systems.com>
[avi: update configure.py]
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