rf-web/vendor/bundle/gems/rb-fsevent-0.10.3/lib/otnetstring.rb
2019-10-21 10:18:17 +02:00

86 lines
3.1 KiB
Ruby

# Copyright (c) 2011 Konstantin Haase
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
require 'stringio'
module OTNetstring
class Error < StandardError; end
class << self
def parse(io, encoding = 'internal', fallback_encoding = nil)
fallback_encoding = io.encoding if io.respond_to? :encoding
io = StringIO.new(io) if io.respond_to? :to_str
length, byte = "", nil
while byte.nil? || byte =~ /\d/
length << byte if byte
byte = io.read(1)
end
if length.size > 9
raise Error, "#{length} is longer than 9 digits"
elsif length !~ /\d+/
raise Error, "Expected '#{byte}' to be a digit"
end
length = Integer(length)
case byte
when '#' then Integer io.read(length)
when ',' then with_encoding io.read(length), encoding, fallback_encoding
when '~' then
raise Error, "nil has length of 0, #{length} given" unless length == 0
when '!' then io.read(length) == 'true'
when '[', '{'
array = []
start = io.pos
array << parse(io, encoding, fallback_encoding) while io.pos - start < length
raise Error, 'Nested element longer than container' if io.pos - start != length
byte == "{" ? Hash[*array] : array
else
raise Error, "Unknown type '#{byte}'"
end
end
def encode(obj, string_sep = ',')
case obj
when String then with_encoding "#{obj.bytesize}#{string_sep}#{obj}", "binary"
when Integer then encode(obj.inspect, '#')
when NilClass then "0~"
when Array then encode(obj.map { |e| encode(e) }.join, '[')
when Hash then encode(obj.map { |a,b| encode(a)+encode(b) }.join, '{')
when FalseClass, TrueClass then encode(obj.inspect, '!')
else raise Error, 'cannot encode %p' % obj
end
end
private
def with_encoding(str, encoding, fallback = nil)
return str unless str.respond_to? :encode
encoding = Encoding.find encoding if encoding.respond_to? :to_str
encoding ||= fallback
encoding ? str.encode(encoding) : str
rescue EncodingError
str.force_encoding(encoding)
end
end
end