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//proc/thread-self/root/opt/alt/ruby21/lib64/ruby/2.1.0/rubygems/package/digest_io.rb

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##
# IO wrapper that creates digests of contents written to the IO it wraps.

class Gem::Package::DigestIO

##
  # Collected digests for wrapped writes.
  #
  #   {
  #     'SHA1'   => #<OpenSSL::Digest: [...]>,
  #     'SHA512' => #<OpenSSL::Digest: [...]>,
  #   }

attr_reader :digests

##
  # Wraps +io+ and updates digest for each of the digest algorithms in
  # the +digests+ Hash.  Returns the digests hash.  Example:
  #
  #   io = StringIO.new
  #   digests = {
  #     'SHA1'   => OpenSSL::Digest.new('SHA1'),
  #     'SHA512' => OpenSSL::Digest.new('SHA512'),
  #   }
  #
  #   Gem::Package::DigestIO.wrap io, digests do |digest_io|
  #     digest_io.write "hello"
  #   end
  #
  #   digests['SHA1'].hexdigest   #=> "aaf4c61d[...]"
  #   digests['SHA512'].hexdigest #=> "9b71d224[...]"

def self.wrap io, digests
    digest_io = new io, digests

yield digest_io

return digests
  end

##
  # Creates a new DigestIO instance.  Using ::wrap is recommended, see the
  # ::wrap documentation for documentation of +io+ and +digests+.

def initialize io, digests
    @io = io
    @digests = digests
  end

##
  # Writes +data+ to the underlying IO and updates the digests

def write data
    result = @io.write data

@digests.each do |_, digest|
      digest << data
    end

result
  end

end

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tar_reader DIR	-	drwxr-xr-x	2024-03-03 22:43:11	Edit Download recursive recursive
digest_io.rb	1.30 KB	lrw-r--r--	2012-11-29 06:52:18	Edit Download recursive recursive
old.rb	3.78 KB	lrw-r--r--	2023-07-26 14:19:40	Edit Download recursive recursive
tar_header.rb	5.28 KB	lrw-r--r--	2014-02-06 02:59:36	Edit Download recursive recursive
tar_reader.rb	2.37 KB	lrw-r--r--	2012-11-29 06:52:18	Edit Download recursive recursive
tar_test_case.rb	3.48 KB	lrw-r--r--	2013-09-14 08:59:02	Edit Download recursive recursive
tar_writer.rb	6.49 KB	lrw-r--r--	2013-09-14 08:59:02	Edit Download recursive recursive

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