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<?php defined("SYSPATH") or die("No direct script access.");
/**
* Gallery - a web based photo album viewer and editor
* Copyright (C) 2000-2009 Bharat Mediratta
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
*/
class digibug_Core {
/**
* Get a unique id for a print request.
* Its a good thing we only support linux as this won't work on Windows
*/
static function uuid() {
$fp = @fopen("/dev/urandom", "rb");
$bits = @fread($fp, 16);
@fclose($fp);
$time_low = bin2hex(substr($bits, 0, 4));
$time_mid = bin2hex(substr($bits, 4, 2));
$time_hi_and_version = bin2hex(substr($bits, 6, 2));
$clock_seq_hi_and_reserved = bin2hex(substr($bits, 8, 2));
$node = bin2hex ( substr ( $bits, 10, 6 ) );
/**
* Set the four most significant bits (bits 12 through 15) of the
* time_hi_and_version field to the 4-bit version number from
* Section 4.1.3.
* @see http://tools.ietf.org/html/rfc4122#section-4.1.3
*/
$time_hi_and_version = hexdec ( $time_hi_and_version );
$time_hi_and_version = $time_hi_and_version >> 4;
$time_hi_and_version = $time_hi_and_version | 0x4000;
/**
* Set the two most significant bits (bits 6 and 7) of the
* clock_seq_hi_and_reserved to zero and one, respectively.
*/
$clock_seq_hi_and_reserved = hexdec ( $clock_seq_hi_and_reserved );
$clock_seq_hi_and_reserved = $clock_seq_hi_and_reserved >> 2;
$clock_seq_hi_and_reserved = $clock_seq_hi_and_reserved | 0x8000;
return sprintf ('%08s-%04s-%04x-%04x-%012s',
$time_low, $time_mid, $time_hi_and_version, $clock_seq_hi_and_reserved, $node);
}
}
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