37 lines
1.0 KiB
Ruby
37 lines
1.0 KiB
Ruby
# 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
|
|
buffer = @zlib_deflater.deflate(data, Zlib::SYNC_FLUSH)
|
|
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.
|