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:/usr/local/lib64/perl5/XML/LibXML/
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Current File : //usr/local/lib64/perl5/XML/LibXML/SAX.pm
# $Id$
#
# This is free software, you may use it and distribute it under the same terms as
# Perl itself.
#
# Copyright 2001-2003 AxKit.com Ltd., 2002-2006 Christian Glahn, 2006-2009 Petr Pajas
#
#

package XML::LibXML::SAX;

use strict;
use warnings;

use vars qw($VERSION @ISA);

$VERSION = "2.0210"; # VERSION TEMPLATE: DO NOT CHANGE

use XML::LibXML;
use XML::SAX::Base;

use parent qw(XML::SAX::Base);

use Carp;
use IO::File;

sub CLONE_SKIP {
  return $XML::LibXML::__threads_shared ? 0 : 1;
}

sub set_feature {
	my ($self, $feat, $val) = @_;

	if ($feat eq 'http://xmlns.perl.org/sax/join-character-data') {
		$self->{JOIN_CHARACTERS} = $val;
		return 1;
	}

	shift(@_);
	return $self->SUPER::set_feature(@_);
}

sub _parse_characterstream {
    my ( $self, $fh ) = @_;
    # this my catch the xml decl, so the parser won't get confused about
    # a possibly wrong encoding.
    croak( "not implemented yet" );
}

# See:
# https://rt.cpan.org/Public/Bug/Display.html?id=132759
sub _calc_new_XML_LibXML_parser_for_compatibility_with_XML_Simple_etc
{
    return XML::LibXML->new( expand_entities => 1, );
}

sub _parse_bytestream {
    my ( $self, $fh ) = @_;
    $self->{ParserOptions}{LibParser}      = $self->_calc_new_XML_LibXML_parser_for_compatibility_with_XML_Simple_etc() unless defined $self->{ParserOptions}{LibParser};
    $self->{ParserOptions}{ParseFunc}      = \&XML::LibXML::parse_fh;
    $self->{ParserOptions}{ParseFuncParam} = $fh;
    $self->_parse;
    return $self->end_document({});
}

sub _parse_string {
    my ( $self, $string ) = @_;
    $self->{ParserOptions}{LibParser}      = $self->_calc_new_XML_LibXML_parser_for_compatibility_with_XML_Simple_etc() unless defined $self->{ParserOptions}{LibParser};
    $self->{ParserOptions}{ParseFunc}      = \&XML::LibXML::parse_string;
    $self->{ParserOptions}{ParseFuncParam} = $string;
    $self->_parse;
    return $self->end_document({});
}

sub _parse_systemid {
    my $self = shift;
    $self->{ParserOptions}{LibParser}      = $self->_calc_new_XML_LibXML_parser_for_compatibility_with_XML_Simple_etc() unless defined $self->{ParserOptions}{LibParser};
    $self->{ParserOptions}{ParseFunc}      = \&XML::LibXML::parse_file;
    $self->{ParserOptions}{ParseFuncParam} = shift;
    $self->_parse;
    return $self->end_document({});
}

sub parse_chunk {
    my ( $self, $chunk ) = @_;
    $self->{ParserOptions}{LibParser}      = $self->_calc_new_XML_LibXML_parser_for_compatibility_with_XML_Simple_etc() unless defined $self->{ParserOptions}{LibParser};
    $self->{ParserOptions}{ParseFunc}      = \&XML::LibXML::parse_xml_chunk;
    $self->{ParserOptions}{LibParser}->{IS_FILTER}=1; # a hack to prevent parse_xml_chunk from issuing end_document
    $self->{ParserOptions}{ParseFuncParam} = $chunk;
    $self->_parse;
    return;
}

sub _parse {
    my $self = shift;
    my $args = bless $self->{ParserOptions}, ref($self);

    if (defined($self->{JOIN_CHARACTERS})) {
    	$args->{LibParser}->{JOIN_CHARACTERS} = $self->{JOIN_CHARACTERS};
    } else {
    	$args->{LibParser}->{JOIN_CHARACTERS} = 0;
    }

    $args->{LibParser}->set_handler( $self );
    eval {
      $args->{ParseFunc}->($args->{LibParser}, $args->{ParseFuncParam});
    };

    if ( $args->{LibParser}->{SAX}->{State} == 1 ) {
        croak( "SAX Exception not implemented, yet; Data ended before document ended\n" );
    }

    # break a possible circular reference
    $args->{LibParser}->set_handler( undef );
    if ( $@ ) {
        croak $@;
    }
    return;
}

1;