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File Name : digest_io.rb

##
# 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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Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/linksafe	0755	2024-03-03 10:43:42
..	dir	-	root/linksafe	0755	2024-03-03 10:43:42
tar_reader	dir	-	root/linksafe	0755	2024-03-03 10:43:42
digest_io.rb	text/x-ruby	1.3 KB	root/linksafe	0644	2012-11-29 06:52:18
old.rb	text/x-ruby	3.78 KB	root/linksafe	0644	2023-07-26 02:06:15
tar_header.rb	text/x-ruby	5.23 KB	root/linksafe	0644	2012-11-29 06:52:18
tar_reader.rb	text/x-ruby	2.37 KB	root/linksafe	0644	2012-11-29 06:52:18
tar_test_case.rb	text/x-ruby	3.42 KB	root/linksafe	0644	2011-07-27 01:40:07
tar_writer.rb	text/x-ruby	5.93 KB	root/linksafe	0644	2012-11-29 06:52:18