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85ad3d82
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Assos Assos
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<?php
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if (!defined('ORD_z'))
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define('ORD_z',ord('z'));
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if (!defined('ORD_exclmark'))
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define('ORD_exclmark', ord('!'));
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if (!defined('ORD_u'))
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define('ORD_u', ord('u'));
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if (!defined('ORD_tilde'))
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define('ORD_tilde', ord('~'));
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if (!class_exists('FilterASCII85', false)) {
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class FilterASCII85 {
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function error($msg) {
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die($msg);
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}
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function decode($in) {
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$out = '';
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$state = 0;
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$chn = null;
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$l = strlen($in);
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for ($k = 0; $k < $l; ++$k) {
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$ch = ord($in[$k]) & 0xff;
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if ($ch == ORD_tilde) {
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break;
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}
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if (preg_match('/^\s$/',chr($ch))) {
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continue;
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}
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if ($ch == ORD_z && $state == 0) {
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$out .= chr(0) . chr(0) . chr(0) . chr(0);
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continue;
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}
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if ($ch < ORD_exclmark || $ch > ORD_u) {
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return $this->error('Illegal character in ASCII85Decode.');
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}
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$chn[$state++] = $ch - ORD_exclmark;
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if ($state == 5) {
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$state = 0;
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$r = 0;
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for ($j = 0; $j < 5; ++$j)
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$r = $r * 85 + $chn[$j];
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$out .= chr($r >> 24);
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$out .= chr($r >> 16);
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$out .= chr($r >> 8);
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$out .= chr($r);
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}
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}
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$r = 0;
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if ($state == 1)
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return $this->error('Illegal length in ASCII85Decode.');
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if ($state == 2) {
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$r = $chn[0] * 85 * 85 * 85 * 85 + ($chn[1]+1) * 85 * 85 * 85;
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$out .= chr($r >> 24);
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}
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else if ($state == 3) {
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$r = $chn[0] * 85 * 85 * 85 * 85 + $chn[1] * 85 * 85 * 85 + ($chn[2]+1) * 85 * 85;
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$out .= chr($r >> 24);
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$out .= chr($r >> 16);
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}
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else if ($state == 4) {
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$r = $chn[0] * 85 * 85 * 85 * 85 + $chn[1] * 85 * 85 * 85 + $chn[2] * 85 * 85 + ($chn[3]+1) * 85 ;
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$out .= chr($r >> 24);
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$out .= chr($r >> 16);
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$out .= chr($r >> 8);
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}
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return $out;
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}
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function encode($in) {
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return $this->error("ASCII85 encoding not implemented.");
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}
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}
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} |