Class: Bloombroom::FNVA

Inherits:
Object
  • Object
show all
Defined in:
lib/bloombroom/hash/fnv_a.rb

Constant Summary collapse

OFFSET32 = 
2166136261
OFFSET64 = 
14695981039346656037
OFFSET128 = 
144066263297769815596495629667062367629
OFFSET256 = 
100029257958052580907070968620625704837092796014241193945225284501741471925557
OFFSET512 = 
9659303129496669498009435400716310466090418745672637896108374329434462657994582932197716438449813051892206539805784495328239340083876191928701583869517785
OFFSET1024 = 
14197795064947621068722070641403218320880622795441933960878474914617582723252296732303717722150864096521202355549365628174669108571814760471015076148029755969804077320157692458563003215304957150157403644460363550505412711285966361610267868082893823963790439336411086884584107735010676915
PRIME32 = 
16777619
PRIME64 = 
1099511628211
PRIME128 = 
309485009821345068724781371
PRIME256 = 
374144419156711147060143317175368453031918731002211
PRIME512 = 
35835915874844867368919076489095108449946327955754392558399825615420669938882575126094039892345713852759
PRIME1024 = 
5016456510113118655434598811035278955030765345404790744303017523831112055108147451509157692220295382716162651878526895249385292291816524375083746691371804094271873160484737966720260389217684476157468082573
MASK32 = 
(2 ** 32) - 1
MASK64 = 
(2 ** 64) - 1
MASK128 = 
(2 ** 128) - 1
MASK256 = 
(2 ** 256) - 1
MASK512 = 
(2 ** 512) - 1
MASK1024 = 
(2 ** 1024) - 1

Class Method Summary collapse

Class Method Details

.fnv1_1024(input) ⇒ Object 



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# File 'lib/bloombroom/hash/fnv_a.rb', line 57

def self.fnv1_1024(input)
  hash = OFFSET1024
  input.each_byte { |b| hash = (hash * PRIME1024) ^ b }
  hash & MASK1024
end

.fnv1_128(input) ⇒ Object 



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# File 'lib/bloombroom/hash/fnv_a.rb', line 39

def self.fnv1_128(input)
  hash = OFFSET128
  input.each_byte { |b| hash = (hash * PRIME128) ^ b }
  hash & MASK128
end

.fnv1_256(input) ⇒ Object 



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# File 'lib/bloombroom/hash/fnv_a.rb', line 45

def self.fnv1_256(input)
  hash = OFFSET256
  input.each_byte { |b| hash = (hash * PRIME256) ^ b }
  hash & MASK256
end

.fnv1_32(input) ⇒ Object 



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# File 'lib/bloombroom/hash/fnv_a.rb', line 27

def self.fnv1_32(input)
  hash = OFFSET32
  input.each_byte { |b| hash = (hash * PRIME32) ^ b }
  hash & MASK32
end

.fnv1_512(input) ⇒ Object 



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# File 'lib/bloombroom/hash/fnv_a.rb', line 51

def self.fnv1_512(input)
  hash = OFFSET512
  input.each_byte { |b| hash = (hash * PRIME512) ^ b }
  hash & MASK512
end

.fnv1_64(input) ⇒ Object 



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# File 'lib/bloombroom/hash/fnv_a.rb', line 33

def self.fnv1_64(input)
  hash = OFFSET64
  input.each_byte { |b| hash = (hash * PRIME64) ^ b }
  hash & MASK64
end

.fnv1a_1024(input) ⇒ Object 



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# File 'lib/bloombroom/hash/fnv_a.rb', line 93

def self.fnv1a_1024(input)
  hash = OFFSET1024
  input.each_byte { |b| hash = (hash ^ b) * PRIME1024 }
  hash & MASK1024
end

.fnv1a_128(input) ⇒ Object 



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# File 'lib/bloombroom/hash/fnv_a.rb', line 75

def self.fnv1a_128(input)
  hash = OFFSET128
  input.each_byte { |b| hash = (hash ^ b) * PRIME128 }
  hash & MASK128
end

.fnv1a_256(input) ⇒ Object 



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# File 'lib/bloombroom/hash/fnv_a.rb', line 81

def self.fnv1a_256(input)
  hash = OFFSET256
  input.each_byte { |b| hash = (hash ^ b) * PRIME256 }
  hash & MASK256
end

.fnv1a_32(input) ⇒ Object 



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# File 'lib/bloombroom/hash/fnv_a.rb', line 63

def self.fnv1a_32(input)
  hash = OFFSET32
  input.each_byte { |b| hash = (hash ^ b) * PRIME32 }
  hash & MASK32
end

.fnv1a_512(input) ⇒ Object 



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# File 'lib/bloombroom/hash/fnv_a.rb', line 87

def self.fnv1a_512(input)
  hash = OFFSET512
  input.each_byte { |b| hash = (hash ^ b) * PRIME512 }
  hash & MASK512
end

.fnv1a_64(input) ⇒ Object 



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# File 'lib/bloombroom/hash/fnv_a.rb', line 69

def self.fnv1a_64(input)
  hash = OFFSET64
  input.each_byte { |b| hash = (hash ^ b) * PRIME64 }
  hash & MASK64
end