Module: HumanDigest

Defined in:
lib/human_digest.rb,
lib/human_digest/version.rb

Overview

HumanDigest - Human-readable representations of digests

Constant Summary collapse

VERSION = 
"0.1.0"

Class Method Summary collapse

Class Method Details

.compress(bytes, target) ⇒ Object

Compress a byte array into a shorter length

Example:

>> HumanDigest.compress([96, 173, 141, 13, 135, 27, 96, 149, 128, 130, 151])
=> [205, 128, 156, 96]

Arguments:

bytes: (Array)
target: (Integer)



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# File 'lib/human_digest.rb', line 74

def self.compress(bytes, target)
	bytes_copy = bytes.clone
	length = bytes_copy.length
	seg_size = (length / target).floor
	segments = []
	target.times { segments.push(bytes_copy.slice!(0, seg_size)) }
	segments[-1].concat(bytes_copy)
	checksums = segments.collect { |a| a.reduce(:^) }
	return checksums
end

.humanize(hexdigest, words = 4, separator = '-') ⇒ Object

Make a digest human-readable

Example:

>> HumanDigest.humanize('60ad8d0d871b6095808297)
=> sodium-magnesium-nineteen-hydrogen

Arguments:

hexdigest: (String)
words: (Integer)
separator: (String)



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# File 'lib/human_digest.rb', line 55

def self.humanize(hexdigest, words=4, separator='-')
  hexdigest = hexdigest.to_s unless hexdigest.respond_to?(:length) and hexdigest.respond_to?(:unpack)
	limit = hexdigest.length / 2
	unpack_format = 'A2' * limit
	bytes = hexdigest.unpack(unpack_format).collect { |x| x.hex }
	compressed = compress(bytes, words)
	return (compressed.collect { |x| @word_list[x] }).join(separator)
end