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# frozen_string_literal: true
module Zip
class Deflater < Compressor # :nodoc:all
def initialize(output_stream, level = Zip.default_compression, encrypter = NullEncrypter.new)
super()
@output_stream = output_stream
@zlib_deflater = ::Zlib::Deflate.new(level, -::Zlib::MAX_WBITS)
@size = 0
@crc = ::Zlib.crc32
@encrypter = encrypter
end
def <<(data)
val = data.to_s
@crc = Zlib.crc32(val, @crc)
@size += val.bytesize
# When JRuby#3962 is fixed, we can remove the flushing parameter here.
buffer = @zlib_deflater.deflate(data, Zip::ZLIB_FLUSHING_STRATEGY)
return @output_stream if buffer.empty?
@output_stream << @encrypter.encrypt(buffer)
end
def finish
buffer = @zlib_deflater.finish
@output_stream << @encrypter.encrypt(buffer) unless buffer.empty?
@zlib_deflater.close
end
attr_reader :size, :crc
end
end
# Copyright (C) 2002, 2003 Thomas Sondergaard
# rubyzip is free software; you can redistribute it and/or
# modify it under the terms of the ruby license.
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