JFIF$        dd7 

Viewing File: /opt/alt/php55/usr/share/pear/ezc/Archive/utils/file_type.php

<?php
/**
 * File containing the abstract ezcArchiveFileType class.
 *
 * @package Archive
 * @version 1.4.1
 * @copyright Copyright (C) 2005-2010 eZ Systems AS. All rights reserved.
 * @license http://ez.no/licenses/new_bsd New BSD License
 * @access private
 */

/**
 * This class provides methods to detect various archive or compression types.
 *
 * The archive formats that can be detected are:
 * - tar ( v7, ustar, pax, gnu )
 * - zip
 *
 * The compression types that can be detected are:
 * - gzip
 * - bzip2
 *
 * @package Archive
 * @version 1.4.1
 * @access private
 */
class ezcArchiveFileType
{
    /**
     * Returns the archive type of the given file.
     *
     * @param string $fileName  Absolute or relative path to the file.
     *
     * @return int    Possible values are: {@link ezcArchive::ZIP},
     *               {@link ezcArchive::TAR}, {@link ezcArchive::TAR_V7}, {@link ezcArchive::TAR_USTAR},
     *               {@link ezcArchive::TAR_PAX}, {@link ezcArchive::TAR_GNU}.
     */
    public static function detect( $fileName )
    {
        $fp = fopen( $fileName, "r" );
        if ( $fp === false )
        {
            return false;
        }

        $data = fread( $fp, 512 );
        fclose( $fp );

        if ( self::isGzip( $data ) )
        {
            return ezcArchive::GZIP;
        }

        if ( self::isBzip2( $data ) )
        {
            return ezcArchive::BZIP2;
        }

        if ( self::isZip( $data ) )
        {
            return ezcArchive::ZIP;
        }

        // Order is important.
        if ( self::isPaxTar( $data ) )
        {
            return ezcArchive::TAR_PAX;
        }

        if ( self::isV7Tar( $data ) )
        {
            return ezcArchive::TAR_V7;
        }

        if ( self::isUstarTar( $data ) )
        {
            return ezcArchive::TAR_USTAR;
        }

        if ( self::isGnuTar( $data ) )
        {
            return ezcArchive::TAR_GNU;
        }

        return false;
    }

    /**
     * Checks if the provided $data matches the known signature of a Bzip2 archive.
     *
     * The $data string parameter must contain the first block of data from a file. It will be
     *                     matched against the known signature for this archive type.
     *
     * @param string $data
     * @return bool
     */
    public static function isBzip2( $data )
    {
        if ( ord( $data[0] ) == 0x42 && ord( $data[1] ) == 0x5a )
        {
            return true;
        }
        return false;
    }

    /**
     * Checks if the provided $data matches the known signature of a Gzip archive.
     *
     * The $data string parameter must contain the first block of data from a file. It will be
     *                     matched against the known signature for this archive type.
     *
     * @param string $data
     * @return bool
     */
    public static function isGzip( $data )
    {
        $h = unpack( "Cid1/Cid2", $data[0] . $data[1] );
        if ( $h["id1"] == 0x1f && $h["id2"] == 0x8b )
        {
            return true;
        }

        return false;
    }

    /**
     * Checks if the provided $data matches the known signature of a Zip archive.
     *
     * The $data string parameter must contain the first block of data from a file. It will be
     *                     matched against the known signature for this archive type.
     *
     * @param string $data
     * @return bool
     */
    public static function isZip( $data )
    {
        if ( $data[0] . $data[1] == pack( "v",  0x4b50 ) )
        {
            return true;
        }

        return false;
    }

    /**
     * Checks if the provided $data matches the known signature of a V7 tar archive.
     *
     * The $data string parameter must contain the first block of data from a file. It will be
     *                     matched against the known signature for this archive type.
     *
     * @param string $data
     * @return bool
     */
     public static function isV7Tar( $data )
     {
        if ( strcmp( substr( $data, 257, 5 ), "\0\0\0\0\0" ) == 0 && strcmp( substr( $data, 263, 2 ), "\0\0" ) == 0 )
        {
            if ( self::tarContainsFileName( $data ) )
            {
                return true;
            }
        }

        return false;
     }

    /**
     * Checks if the provided $data matches the known signature of a USTar archive.
     *
     * The $data string parameter must contain the first block of data from a file. It will be
     *                     matched against the known signature for this archive type.
     *
     * @param string $data
     * @return bool
     */
    public static function isUstarTar( $data )
    {
        if ( strcmp( substr( $data, 257, 5 ), "ustar" ) == 0 && strcmp( substr( $data, 263, 2 ), "00" ) == 0 )
        {
            if ( self::tarContainsFileName( $data ) )
            {
                return true;
            }
        }

        return false;
    }

    /**
     * Checks if the provided $data matches the known signature of a PAX tar archive.
     *
     * The $data string parameter must contain the first block of data from a file. It will be
     *                     matched against the known signature for this archive type.
     *
     * @param string $data
     * @return bool
     */
    public static function isPaxTar( $data )
    {
        if ( strcmp( substr( $data, 257, 5 ), "ustar" ) == 0 && strcmp( substr( $data, 263, 2 ), "00" ) == 0 )
        {
            $type = substr( $data, 156, 1 );
            if ( $type == "x" || $type == "g" )
            {
                if ( self::tarContainsFileName( $data ) )
                {
                    return true;
                }
            }
        }

        return false;
    }

    /**
     * Checks if the provided $data matches the known signature of a GNU tar archive.
     *
     * The $data string parameter must contain the first block of data from a file. It will be
     *                     matched against the known signature for this archive type.
     *
     * @param string $data
     * @return bool
     */
    public static function isGnuTar( $data )
    {
        if ( strcmp( substr( $data, 257, 5 ), "ustar" ) == 0 && strcmp( substr( $data, 263, 2 ), " \0" ) == 0 )
        {
            if ( self::tarContainsFileName( $data ) )
            {
                return true;
            }
        }

        return false;
    }

    /**
     * Checks if the provided $data contains a file name.
     *
     * The $data string parameter must contain the first block of data from a file. It will be
     *                     matched against the known signature for this archive type.
     *
     * @param string $data
     * @return bool
     */
    public static function tarContainsFileName( $data )
    {
        return $data[0] != "\0";
    }
}
?>
Back to Directory  nL+D550H?Mx ,D"v]qv;6*Zqn)ZP0!1 A "#a$2Qr D8 a Ri[f\mIykIw0cuFcRı?lO7к_f˓[C$殷WF<_W ԣsKcëIzyQy/_LKℂ;C",pFA:/]=H  ~,ls/9ć:[=/#f;)x{ٛEQ )~ =𘙲r*2~ a _V=' kumFD}KYYC)({ *g&f`툪ry`=^cJ.I](*`wq1dđ#̩͑0;H]u搂@:~וKL Nsh}OIR*8:2 !lDJVo(3=M(zȰ+i*NAr6KnSl)!JJӁ* %݉?|D}d5:eP0R;{$X'xF@.ÊB {,WJuQɲRI;9QE琯62fT.DUJ;*cP A\ILNj!J۱+O\͔]ޒS߼Jȧc%ANolՎprULZԛerE2=XDXgVQeӓk yP7U*omQIs,K`)6\G3t?pgjrmۛجwluGtfh9uyP0D;Uڽ"OXlif$)&|ML0Zrm1[HXPlPR0'G=i2N+0e2]]9VTPO׮7h(F*癈'=QVZDF,d߬~TX G[`le69CR(!S2!P <0x<!1AQ "Raq02Br#SCTb ?Ζ"]mH5WR7k.ۛ!}Q~+yԏz|@T20S~Kek *zFf^2X*(@8r?CIuI|֓>^ExLgNUY+{.RѪ τV׸YTD I62'8Y27'\TP.6d&˦@Vqi|8-OΕ]ʔ U=TL8=;6c| !qfF3aů&~$l}'NWUs$Uk^SV:U# 6w++s&r+nڐ{@29 gL u"TÙM=6(^"7r}=6YݾlCuhquympǦ GjhsǜNlɻ}o7#S6aw4!OSrD57%|?x>L |/nD6?/8w#[)L7+6〼T ATg!%5MmZ/c-{1_Je"|^$'O&ޱմTrb$w)R$& N1EtdU3Uȉ1pM"N*(DNyd96.(jQ)X 5cQɎMyW?Q*!R>6=7)Xj5`J]e8%t!+'!1Q5 !1 AQaqё#2"0BRb?Gt^## .llQT $v,,m㵜5ubV =sY+@d{N! dnO<.-B;_wJt6;QJd.Qc%p{ 1,sNDdFHI0ГoXшe黅XۢF:)[FGXƹ/w_cMeD,ʡcc.WDtA$j@:) -# u c1<@ۗ9F)KJ-hpP]_x[qBlbpʖw q"LFGdƶ*s+ډ_Zc"?%t[IP 6J]#=ɺVvvCGsGh1 >)6|ey?Lӣm,4GWUi`]uJVoVDG< SB6ϏQ@ TiUlyOU0kfV~~}SZ@*WUUi##; s/[=!7}"WN]'(L! ~y5g9T̅JkbM' +s:S +B)v@Mj e Cf jE 0Y\QnzG1д~Wo{T9?`Rmyhsy3!HAD]mc1~2LSu7xT;j$`}4->L#vzŏILS ֭T{rjGKC;bpU=-`BsK.SFw4Mq]ZdHS0)tLg