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File Manager

Path: /opt/chef/embedded/lib/ruby/gems/2.7.0/gems/htmlentities-4.3.4/lib/htmlentities/

Viewing File: decoder.rb

class HTMLEntities
  class Decoder #:nodoc:
    def initialize(flavor)
      @flavor = flavor
      @map = HTMLEntities::MAPPINGS[@flavor]
      @entity_regexp = entity_regexp
    end

    def decode(source)
      prepare(source).gsub(@entity_regexp){
        if $1 && codepoint = @map[$1]
          [codepoint].pack('U')
        elsif $2
          [$2.to_i(10)].pack('U')
        elsif $3
          [$3.to_i(16)].pack('U')
        else
          $&
        end
      }
    end

  private
    def prepare(string) #:nodoc:
      string.to_s.encode(Encoding::UTF_8)
    end

    def entity_regexp
      key_lengths = @map.keys.map{ |k| k.length }
      if @flavor == 'expanded'
        entity_name_pattern = '(?:b\.)?[a-z][a-z0-9]'
      else
        entity_name_pattern = '[a-z][a-z0-9]'
      end
      /&(?:(#{entity_name_pattern}{#{key_lengths.min - 1},#{key_lengths.max - 1}})|#([0-9]{1,7})|#x([0-9a-f]{1,6}));/i
    end
  end
end