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Contents
module Emailer
module StringUtilities
def q_encode_char(n)
hex = n.to_s 16
hex = "0#{hex}" if hex.length == 1
"=#{hex}"
end
def q_char(n)
# We can escape SPACE (0x20) with '_'
return '_' if n == 32
# We can use ASCII 33 to 126, except '=', '?' and '_' (see above).
# All other byte values will be encoded with =XX
(n < 33 || n == 61 || n == 63 || n == 95 || n > 126) ? q_encode_char(n) : n.chr
end
def q_encode_bytes(str)
str.bytes.map { |b| q_char(b) }
end
def q_word(encoding, encoded_str)
"=?#{encoding}?Q?#{encoded_str}?="
end
def string_to_q(str)
max_word_length = 76 - "=?#{str.encoding.to_s}?Q??=".length
lines = split_string q_encode_bytes(str), max_word_length
lines.map { |l| q_word(str.encoding.to_s, l) }.join("\r\n ")
end
def split_string(parts, maxlen)
result = ['']
while parts.length > 0
if (result[-1].length + parts[0].length <= maxlen)
result[-1] += parts.shift
else
result << parts.shift
end
end
result
end
end
end
# require 'lib/emailer/string_utilities'
# extend Emailer::StringUtilities
Version data entries
12 entries across 12 versions & 2 rubygems