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/share/perl5/XML/SAX/PurePerl/
Upload File :
Current File : //usr/local/share/perl5/XML/SAX/PurePerl/EncodingDetect.pm
# $Id$

package XML::SAX::PurePerl; # NB, not ::EncodingDetect!

use strict;

sub encoding_detect {
    my ($parser, $reader) = @_;
    
    my $error = "Invalid byte sequence at start of file";
    
    my $data = $reader->data;
    if ($data =~ /^\x00\x00\xFE\xFF/) {
        # BO-UCS4-be
        $reader->move_along(4);
        $reader->set_encoding('UCS-4BE');
        return;
    }
    elsif ($data =~ /^\x00\x00\xFF\xFE/) {
        # BO-UCS-4-2143
        $reader->move_along(4);
        $reader->set_encoding('UCS-4-2143');
        return;
    }
    elsif ($data =~ /^\x00\x00\x00\x3C/) {
        $reader->set_encoding('UCS-4BE');
        return;
    }
    elsif ($data =~ /^\x00\x00\x3C\x00/) {
        $reader->set_encoding('UCS-4-2143');
        return;
    }
    elsif ($data =~ /^\x00\x3C\x00\x00/) {
        $reader->set_encoding('UCS-4-3412');
        return;
    }
    elsif ($data =~ /^\x00\x3C\x00\x3F/) {
        $reader->set_encoding('UTF-16BE');
        return;
    }
    elsif ($data =~ /^\xFF\xFE\x00\x00/) {
        # BO-UCS-4LE
        $reader->move_along(4);
        $reader->set_encoding('UCS-4LE');
        return;
    }
    elsif ($data =~ /^\xFF\xFE/) {
        $reader->move_along(2);
        $reader->set_encoding('UTF-16LE');
        return;
    }
    elsif ($data =~ /^\xFE\xFF\x00\x00/) {
        $reader->move_along(4);
        $reader->set_encoding('UCS-4-3412');
        return;
    }
    elsif ($data =~ /^\xFE\xFF/) {
        $reader->move_along(2);
        $reader->set_encoding('UTF-16BE');
        return;
    }
    elsif ($data =~ /^\xEF\xBB\xBF/) { # UTF-8 BOM
        $reader->move_along(3);
        $reader->set_encoding('UTF-8');
        return;
    }
    elsif ($data =~ /^\x3C\x00\x00\x00/) {
        $reader->set_encoding('UCS-4LE');
        return;
    }
    elsif ($data =~ /^\x3C\x00\x3F\x00/) {
        $reader->set_encoding('UTF-16LE');
        return;
    }
    elsif ($data =~ /^\x3C\x3F\x78\x6D/) {
        # $reader->set_encoding('UTF-8');
        return;
    }
    elsif ($data =~ /^\x3C\x3F\x78/) {
        # $reader->set_encoding('UTF-8');
        return;
    }
    elsif ($data =~ /^\x3C\x3F/) {
        # $reader->set_encoding('UTF-8');
        return;
    }
    elsif ($data =~ /^\x3C/) {
        # $reader->set_encoding('UTF-8');
        return;
    }
    elsif ($data =~ /^[\x20\x09\x0A\x0D]+\x3C[^\x3F]/) {
        # $reader->set_encoding('UTF-8');
        return;
    }
    elsif ($data =~ /^\x4C\x6F\xA7\x94/) {
        $reader->set_encoding('EBCDIC');
        return;
    }
    
    warn("Unable to recognise encoding of this document");
    return;
}

1;