module Asciidoctor::Diagram::Base64

Public Class Methods

urlsafe_decode(str) click to toggle source
# File lib/asciidoctor-diagram/util/base64.rb, line 11
def self.urlsafe_decode(str)
  # NOTE: RFC 4648 does say nothing about unpadded input, but says that
  # "the excess pad characters MAY also be ignored", so it is inferred that
  # unpadded input is also acceptable.
  if !str.end_with?("=") && str.length % 4 != 0
    str = str.ljust((str.length + 3) & ~3, "=")
    str.tr!("-_", "+/")
  else
    str = str.tr("-_", "+/")
  end
  str.unpack1("m0")
end
urlsafe_encode(bin, padding: true) click to toggle source
# File lib/asciidoctor-diagram/util/base64.rb, line 4
def self.urlsafe_encode(bin, padding: true)
  str = [bin].pack("m0")
  str.chomp!("==") or str.chomp!("=") unless padding
  str.tr!("+/", "-_")
  str
end