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require 'ndr_support/utf8_encoding'
module UTF8Encoding
# Allows any supported object to have control characters
# escaped, using standard replacement scheme.
module ControlCharacters
# The range of characters we consider:
CONTROL_CHARACTERS = /[\x00-\x1f]|\x7f/
# Exceptions that are allowed:
ALLOWED_CONTROL_CHARACTERS = %W( \x09 \x0a \x0d )
# Recursively escape any control characters in `object`.
def escape_control_chars_in_object!(object)
case object
when String
escape_control_chars!(object)
when Hash
escape_control_chars_in_hash!(object)
when Array
escape_control_chars_in_array!(object)
else
object
end
end
# Returns a copy of `string`, with any control characters escaped.
def escape_control_chars(string)
escape_control_chars!(string.dup)
end
# Escapes in-place any control characters in `string`, before returning it.
def escape_control_chars!(string)
string.gsub!(CONTROL_CHARACTERS) do |character|
if ALLOWED_CONTROL_CHARACTERS.include?(character)
character
else
UTF8Encoding::REPLACEMENT_SCHEME[character]
end
end
string
end
# Escape control characters in values of the given `hash`.
def escape_control_chars_in_hash!(hash)
hash.each_value { |value| escape_control_chars_in_object!(value) }
end
# Escape control characters in elements of the given `array`.
def escape_control_chars_in_array!(array)
array.each { |element| escape_control_chars_in_object!(element) }
end
end
end
Version data entries
17 entries across 17 versions & 1 rubygems