Digest::StringBuffer is a class that just only to string buffering for message digest.

Digest::StringBuffer increase speed by limiting function.

Digest::StringBuffer more fast than Digest::Class when calculate hash meny times.

Digest::StringBuffer depends only one method finish.

module Digest
  class Prime31 < StringBuffer
    def initialize
      @prime = 31
    end
  
    def finish
      result = 0
      buffer.unpack("C*").each do |c|
        result += (c * @prime)
      end
      [result & 0xffffffff].pack("N")
    end
  end
end

p Digest::Prime31.hexdigest("abc" * 1000) #=> "008b1190"

digest: make self instance and execute update and digest

hexdigest: make self instance and execute update and hexdigest

update: add string in buffer.

<<: alias of update.

finish: should be overriden subclasses.

reset: initialize instance

digest: execute finish. it's should be return string.

digest!: execute digest and reset

hexdigest: execute digest and change to hex string.

hexdigest!: execute hexdigest and reset

digest_length: byte size of digest

length: and size alias of digest

==: check same string when execute digest

initialize_copy: run when dup and clone

to_s: same mean hexdigest when no arguments

buffer: string of all buffering now.

Add this line to your application's Gemfile:

gem 'digest-stringbuffer'

And then execute:

$ bundle

Or install it yourself as:

$ gem install digest-stringbuffer

1. Fork it
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 new Pull Request