Fortran port of Murmur3 hash

This is a Fortran port of the Murmur3 hash function, based on the C port by Peter Scott.

Usage

Compile m_murmur3.f90 and include it with use m_murmur3. Two hash functions are included:

# 32 bit hash, low throughput, low latency (good for short small keys)
MurmurHash3_x86_32 (key, klen, seed, hash)

# 128 bit hash, 250% higher throughput, similar latency (good for long keys)
MurmurHash3_x64_128(key, klen, seed, hash)

The arguments are:

• key: string you wish to hash. A generic interface is provided, so that you can give either a string (character(len=klen) :: key) or a character array (character :: key(klen))
• klen: the length of the string
• seed: seed for the hash
• hash: resulting hash

MurmurHash3_x86_128 has been omitted, since it is only useful on older x86 hardware.

Links

• ffhash Fast Fortran Hash table
• Hash tables on Fortran Wiki

License and contributing

All this code is in the public domain. Murmur3 was created by Austin Appleby, and the C port and general tidying up (that this code is based on) was done by Peter Scott.