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　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。 . Prv8 Shell

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Directory : /usr/share/perl5/IO/Uncompress/Adapter/

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Current File : //usr/share/perl5/IO/Uncompress/Adapter/Inflate.pm

package IO::Uncompress::Adapter::Inflate;

use strict;
use warnings;
use bytes;

use IO::Compress::Base::Common  2.081 qw(:Status);
use Compress::Raw::Zlib  2.081 qw(Z_OK Z_BUF_ERROR Z_STREAM_END Z_FINISH MAX_WBITS);

our ($VERSION);
$VERSION = '2.081';



sub mkUncompObject
{
    my $crc32   = shift || 1;
    my $adler32 = shift || 1;
    my $scan    = shift || 0;

    my $inflate ;
    my $status ;

    if ($scan)
    {
        ($inflate, $status) = new Compress::Raw::Zlib::InflateScan
                                    #LimitOutput  => 1,
                                    CRC32        => $crc32,
                                    ADLER32      => $adler32,
                                    WindowBits   => - MAX_WBITS ;
    }
    else
    {
        ($inflate, $status) = new Compress::Raw::Zlib::Inflate
                                    AppendOutput => 1,
                                    LimitOutput  => 1,
                                    CRC32        => $crc32,
                                    ADLER32      => $adler32,
                                    WindowBits   => - MAX_WBITS ;
    }

    return (undef, "Could not create Inflation object: $status", $status) 
        if $status != Z_OK ;

    return bless {'Inf'        => $inflate,
                  'CompSize'   => 0,
                  'UnCompSize' => 0,
                  'Error'      => '',
                  'ConsumesInput' => 1,
                 } ;     
    
}

sub uncompr
{
    my $self = shift ;
    my $from = shift ;
    my $to   = shift ;
    my $eof  = shift ;

    my $inf   = $self->{Inf};

    my $status = $inf->inflate($from, $to, $eof);
    $self->{ErrorNo} = $status;

    if ($status != Z_OK && $status != Z_STREAM_END && $status != Z_BUF_ERROR)
    {
        $self->{Error} = "Inflation Error: $status";
        return STATUS_ERROR;
    }
            
    return STATUS_OK        if $status == Z_BUF_ERROR ; # ???
    return STATUS_OK        if $status == Z_OK ;
    return STATUS_ENDSTREAM if $status == Z_STREAM_END ;
    return STATUS_ERROR ;
}

sub reset
{
    my $self = shift ;
    $self->{Inf}->inflateReset();

    return STATUS_OK ;
}

#sub count
#{
#    my $self = shift ;
#    $self->{Inf}->inflateCount();
#}

sub crc32
{
    my $self = shift ;
    $self->{Inf}->crc32();
}

sub compressedBytes
{
    my $self = shift ;
    $self->{Inf}->compressedBytes();
}

sub uncompressedBytes
{
    my $self = shift ;
    $self->{Inf}->uncompressedBytes();
}

sub adler32
{
    my $self = shift ;
    $self->{Inf}->adler32();
}

sub sync
{
    my $self = shift ;
    ( $self->{Inf}->inflateSync(@_) == Z_OK) 
            ? STATUS_OK 
            : STATUS_ERROR ;
}


sub getLastBlockOffset
{
    my $self = shift ;
    $self->{Inf}->getLastBlockOffset();
}

sub getEndOffset
{
    my $self = shift ;
    $self->{Inf}->getEndOffset();
}

sub resetLastBlockByte
{
    my $self = shift ;
    $self->{Inf}->resetLastBlockByte(@_);
}

sub createDeflateStream
{
    my $self = shift ;
    my $deflate = $self->{Inf}->createDeflateStream(@_);
    return bless {'Def'        => $deflate,
                  'CompSize'   => 0,
                  'UnCompSize' => 0,
                  'Error'      => '',
                 }, 'IO::Compress::Adapter::Deflate';
}

1;


__END__

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