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# encoding: utf-8
# frozen_string_literal: true
require 'mail/encodings/7bit'
module Mail
module Encodings
# Base64 encoding handles binary content at the cost of 4 output bytes
# per input byte.
class Base64 < SevenBit
NAME = 'base64'
PRIORITY = 3
Encodings.register(NAME, self)
def self.can_encode?(enc)
true
end
def self.decode(str)
Utilities.decode_base64(str)
end
def self.encode(str)
::Mail::Utilities.binary_unsafe_to_crlf(Utilities.encode_base64(str))
end
# 3 bytes in -> 4 bytes out
def self.cost(str)
4.0 / 3
end
# Ruby Base64 inserts newlines automatically, so it doesn't exceed
# SMTP line length limits.
def self.compatible_input?(str)
true
end
end
end
end
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