fnv

Crystal Implementation of Fowler–Noll–Vo hash crystal-shard fnv-algorithms fnv-1a fnv crystal-fnv
0.1.1 Latest release released

Crystal-FNV

Implements 32, 64 and 128 bits FNV-1 and FNV-1a Fowler–Noll–Vo hash function. FNV is a non-cryptographic hash function created by Glenn Fowler, Landon Curt Noll, and Phong Vo. Refer to Wikipedia for more details.

Installation

  1. Add the dependency to your shard.yml:

    dependencies:
      fnv:
        github: naqvis/crystal-fnv
    
  2. Run shards install

Usage

require "fnv"

# 32bit FNV-1
digest = Digest::FNV32.digest("foo")
p IO::ByteFormat::BigEndian.decode(UInt32, digest) # => 1083137555

# 32bit FNV-1a
digest = Digest::FNV32A.digest("foo")
p IO::ByteFormat::BigEndian.decode(UInt32, digest) # => 2851307223

# 64bit FNV-1
digest = Digest::FNV64.digest("foo")
p IO::ByteFormat::BigEndian.decode(UInt64, digest) # => 15621798640163566899

# 64bit FNV-1a
digest = Digest::FNV64A.digest("foo")
p IO::ByteFormat::BigEndian.decode(UInt64, digest) # => 15902901984413996407

# 128bit FNV-1
digest = Digest::FNV128.digest("foo")
p IO::ByteFormat::BigEndian.decode(UInt128, digest) # => 221377198890555750482995053501755142603

# 128bit FNV-1a
digest = Digest::FNV128A.digest("foo")
p IO::ByteFormat::BigEndian.decode(UInt128, digest) # => 221385884292107687162785618921601726655

Contributing

  1. Fork it (https://github.com/naqvis/crystal-fnv/fork)
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create a new Pull Request

Contributors

fnv:
  github: naqvis/crystal-fnv
  version: ~> 0.1.1
License MIT
Crystal 0.35.0

Authors

Dependencies 0

Development Dependencies 0

Dependents 1

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