Class: Multibases::Base64::Table

Inherits:
OrdTable
  • Object
show all
Defined in:
lib/multibases/base64.rb

Instance Attribute Summary

Attributes inherited from OrdTable

#base, #encoding, #factor, #padder

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from OrdTable

#alphabet, #eql?, #hash, #strict?, #tr_ords

Constructor Details

#initialize(ords, **opts) ⇒ Table

Returns a new instance of Table.



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# File 'lib/multibases/base64.rb', line 42

def initialize(ords, **opts)
  ords = ords.uniq

  if ords.length < 64 || ords.length > 65
    raise ArgumentError,
          'Expected alphabet to contain 64 characters or 65 + 1 ' \
          "padding character. Actual: #{ords.length} characters"
  end

  padder = nil
  *ords, padder = ords if ords.length == 65

  super(ords, padder: padder, **opts)
end

Class Method Details

.from(alphabet, **opts) ⇒ Object 



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# File 'lib/multibases/base64.rb', line 35

def self.from(alphabet, **opts)
  alphabet = alphabet.bytes if alphabet.respond_to?(:bytes)
  alphabet.map!(&:ord)

  new(alphabet, **opts)
end