You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
106 lines
3.1 KiB
PHP
106 lines
3.1 KiB
PHP
<?php
|
|
|
|
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
|
|
|
|
/**
|
|
* A class for performing byte-wise string operations
|
|
*
|
|
* GPG I/O streams are managed using bytes rather than characters.
|
|
*
|
|
* PHP version 5
|
|
*
|
|
* LICENSE:
|
|
*
|
|
* This library is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as
|
|
* published by the Free Software Foundation; either version 2.1 of the
|
|
* License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
* @category Encryption
|
|
* @package Crypt_GPG
|
|
* @author Michael Gauthier <mike@silverorange.com>
|
|
* @copyright 2013 silverorange
|
|
* @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
|
|
* @version CVS: $Id$
|
|
* @link http://pear.php.net/package/Crypt_GPG
|
|
*/
|
|
|
|
// {{{ class Crypt_GPG_ByteUtils
|
|
|
|
/**
|
|
* A class for performing byte-wise string operations
|
|
*
|
|
* GPG I/O streams are managed using bytes rather than characters. This class
|
|
* requires the mbstring extension to be available.
|
|
*
|
|
* @category Encryption
|
|
* @package Crypt_GPG
|
|
* @author Michael Gauthier <mike@silverorange.com>
|
|
* @copyright 2013 silverorange
|
|
* @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
|
|
* @link http://pear.php.net/package/Crypt_GPG
|
|
* @link http://php.net/mbstring
|
|
*/
|
|
class Crypt_GPG_ByteUtils
|
|
{
|
|
// {{{ strlen()
|
|
|
|
/**
|
|
* Gets the length of a string in bytes
|
|
*
|
|
* This is used for stream-based communication with the GPG subprocess.
|
|
*
|
|
* @param string $string the string for which to get the length.
|
|
*
|
|
* @return integer the length of the string in bytes.
|
|
*/
|
|
public static function strlen($string)
|
|
{
|
|
return mb_strlen($string, '8bit');
|
|
}
|
|
|
|
// }}}
|
|
// {{{ substr()
|
|
|
|
/**
|
|
* Gets the substring of a string in bytes
|
|
*
|
|
* This is used for stream-based communication with the GPG subprocess.
|
|
*
|
|
* @param string $string the input string.
|
|
* @param integer $start the starting point at which to get the substring.
|
|
* @param integer $length optional. The length of the substring.
|
|
*
|
|
* @return string the extracted part of the string. Unlike the default PHP
|
|
* <kbd>substr()</kbd> function, the returned value is
|
|
* always a string and never false.
|
|
*/
|
|
public static function substr($string, $start, $length = null)
|
|
{
|
|
if ($length === null) {
|
|
return mb_substr(
|
|
$string,
|
|
$start,
|
|
self::strlen($string) - $start, '8bit'
|
|
);
|
|
}
|
|
|
|
return mb_substr($string, $start, $length, '8bit');
|
|
}
|
|
|
|
// }}}
|
|
}
|
|
|
|
// }}}
|
|
|
|
?>
|