1  #
   2  # HTTPVersion.rb -- presentation of HTTP version
   3  #
   4  # Author: IPR -- Internet Programming with Ruby -- writers
   5  # Copyright (c) 2002 Internet Programming with Ruby writers. All rights
   6  # reserved.
   7  #
   8  # $IPR: httpversion.rb,v 1.5 2002/09/21 12:23:37 gotoyuzo Exp $
   9 
  10  module WEBrick
  11    class HTTPVersion
  12      include Comparable
  13 
  14      attr_accessor :major, :minor
  15 
  16      def self.convert(version)
  17        version.is_a?(self) ? version : new(version)
  18      end
  19 
  20      def initialize(version)
  21        case version
  22        when HTTPVersion
  23          @major, @minor = version.major, version.minor
  24        when String
  25          if /^(\d+)\.(\d+)$/ =~ version
  26            @major, @minor = $1.to_i, $2.to_i
  27          end
  28        end
  29        if @major.nil? || @minor.nil?
  30          raise ArgumentError,
  31            format("cannot convert %s into %s", version.class, self.class)
  32        end
  33      end
  34 
  35      def <=>(other)
  36        unless other.is_a?(self.class)
  37          other = self.class.new(other)
  38        end
  39        if (ret = @major <=> other.major) == 0
  40          return @minor <=> other.minor
  41        end
  42        return ret
  43      end
  44 
  45      def to_s
  46        format("%d.%d", @major, @minor)
  47      end
  48    end
  49  end