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Name	Size	Permission	Date
tar_reader	[ DIR ]	drwxr-xr-x	2024-07-24 10:34
digest_io.rb	1.33 KB	-rw-r--r--	2024-06-26 13:55
file_source.rb	609 B	-rw-r--r--	2024-06-26 13:55
io_source.rb	813 B	-rw-r--r--	2024-06-26 13:55
old.rb	3.63 KB	-rw-r--r--	2024-06-26 13:55
source.rb	71 B	-rw-r--r--	2024-06-26 13:55
tar_header.rb	5.9 KB	-rw-r--r--	2024-06-26 13:55
tar_reader.rb	2.35 KB	-rw-r--r--	2024-06-26 13:55
tar_writer.rb	7.51 KB	-rw-r--r--	2024-06-26 13:55

Rename

# frozen_string_literal: true
##
# 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