Class: Base32::Electrologica

Inherits:
Base
  • Object
show all
Defined in:
lib/base32-alphabets/electrologica.rb

Overview

Base32 (2^5 - 5-bits)

Constant Summary collapse

ALPHABET = 
%w[ 00 01 02 03 04 05 06 07
08 09 10 11 12 13 14 15
16 17 18 19 20 21 22 23
24 25 26 27 28 29 30 31 ]
NUMBER = 
{
  '00' => 0,  '0' => 0,
  '01' => 1,  '1' => 1,
  '02' => 2,  '2' => 2,
  '03' => 3,  '3' => 3,
  '04' => 4,  '4' => 4,
  '05' => 5,  '5' => 5,
  '06' => 6,  '6' => 6,
  '07' => 7,  '7' => 7,
  '08' => 8,  '8' => 8,
  '09' => 9,  '9' => 9,
  '10' => 10,
  '11' => 11,
  '12' => 12,
  '13' => 13,
  '14' => 14,
  '15' => 15,
  '16' => 16,
  '17' => 17,
  '18' => 18,
  '19' => 19,
  '20' => 20,
  '21' => 21,
  '22' => 22,
  '23' => 23,
  '24' => 24,
  '25' => 25,
  '26' => 26,
  '27' => 27,
  '28' => 28,
  '29' => 29,
  '30' => 30,
  '31' => 31,
}
BINARY = 
_build_binary()
CODE = 
_build_code()
BIN =

add shortcuts (convenience) aliases

BINARY
NUM = 
NUMBER

Class Method Summary collapse

Methods inherited from Base

_build_binary, _build_code, bytes, decode, encode, fmt

Class Method Details

._clean(str) ⇒ Object 



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# File 'lib/base32-alphabets/electrologica.rb', line 97

def self._clean( str )
  ## note: allow spaces or slash (/) for dashes (-)
  str = str.strip  ## remove leading and trailing spaces (first)
  str = str.tr( ' /', '-' )
  str = str.gsub( /-{2,}/, '-' )  ## fold more than one dash into one
end

._decode(str) ⇒ Object

Converts a base32 string to a base10 integer.



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# File 'lib/base32-alphabets/electrologica.rb', line 87

def self._decode( str )
  str = _clean( str )
  str.split('-').reduce([]) do |bytes,char|
    byte = number[char]
    raise ArgumentError, "Value passed not a valid base32 string - >#{char}< not found in alphabet"  if byte.nil?
    bytes << byte
    bytes
  end
end

._encode(bytes) ⇒ Object

Converts a base10 integer to a base32 string.



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# File 'lib/base32-alphabets/electrologica.rb', line 64

def self._encode( bytes )
  bytes.each_with_index.reduce(String.new) do |buf, (byte,i)|
    buf << "-"    if i > 0   ## add separator (-) EXCEPT for first char
    buf << alphabet[byte]
    buf
  end
end

._fmt(str, group: 4, sep: ' ') ⇒ Object 



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# File 'lib/base32-alphabets/electrologica.rb', line 72

def self._fmt( str, group: 4, sep: ' ' )
  ## todo/fix: check sep - MUST be space () or slash (/) for now!!!!!

  str = _clean( str )

  ## format in groups of four (4) separated by space
  ##  e.g.  09-09-09-09-06-07-07-04-01-01-14-01-09-15-14-14-00-05-05-00
  ##     :  09-09-09-09 06-07-07-04 01-01-14-01 09-15-14-14 00-05-05-00

  ## note: use reverse - if not divided by four that leading slice gets cut short
  str.split('-').reverse.each_slice( group ).map { |slice| slice.reverse.join( '-' ) }.reverse.join( sep )
end

.alphabet ⇒ Object

add alpha / char aliases - why? why not?



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# File 'lib/base32-alphabets/electrologica.rb', line 11

def self.alphabet() ALPHABET; end

.binary ⇒ Object 



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# File 'lib/base32-alphabets/electrologica.rb', line 59

def self.binary() BINARY; end

.code ⇒ Object 



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# File 'lib/base32-alphabets/electrologica.rb', line 58

def self.code() CODE; end

.number ⇒ Object 



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# File 'lib/base32-alphabets/electrologica.rb', line 49

def self.number() NUMBER; end