晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 sh-3ll

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sh-3ll 1.0
DIR:/opt/alt/ruby27/share/ruby/rss/
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Current File : //opt/alt/ruby27/share/ruby/rss/xmlscanner.rb
# frozen_string_literal: false
require 'xmlscan/scanner'
require 'stringio'

module RSS

  class XMLScanParser < BaseParser

    class << self
      def listener
        XMLScanListener
      end
    end

    private
    def _parse
      begin
        if @rss.is_a?(String)
          input = StringIO.new(@rss)
        else
          input = @rss
        end
        scanner = XMLScan::XMLScanner.new(@listener)
        scanner.parse(input)
      rescue XMLScan::Error => e
        lineno = e.lineno || scanner.lineno || input.lineno
        raise NotWellFormedError.new(lineno){e.message}
      end
    end

  end

  class XMLScanListener < BaseListener

    include XMLScan::Visitor
    include ListenerMixin

    ENTITIES = {
      'lt' => '<',
      'gt' => '>',
      'amp' => '&',
      'quot' => '"',
      'apos' => '\''
    }

    def on_xmldecl_version(str)
      @version = str
    end

    def on_xmldecl_encoding(str)
      @encoding = str
    end

    def on_xmldecl_standalone(str)
      @standalone = str
    end

    def on_xmldecl_end
      xmldecl(@version, @encoding, @standalone == "yes")
    end

    alias_method(:on_pi, :instruction)
    alias_method(:on_chardata, :text)
    alias_method(:on_cdata, :text)

    def on_etag(name)
      tag_end(name)
    end

    def on_entityref(ref)
      text(entity(ref))
    end

    def on_charref(code)
      text([code].pack('U'))
    end

    alias_method(:on_charref_hex, :on_charref)

    def on_stag(name)
      @attrs = {}
    end

    def on_attribute(name)
      @attrs[name] = @current_attr = ''
    end

    def on_attr_value(str)
      @current_attr << str
    end

    def on_attr_entityref(ref)
      @current_attr << entity(ref)
    end

    def on_attr_charref(code)
      @current_attr << [code].pack('U')
    end

    alias_method(:on_attr_charref_hex, :on_attr_charref)

    def on_stag_end(name)
      tag_start(name, @attrs)
    end

    def on_stag_end_empty(name)
      tag_start(name, @attrs)
      tag_end(name)
    end

    private
    def entity(ref)
      ent = ENTITIES[ref]
      if ent
        ent
      else
        wellformed_error("undefined entity: #{ref}")
      end
    end
  end

end