/usr/share/php/PHPUnit/Util/String.php is in phpunit 3.7.28-1.
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/**
* PHPUnit
*
* Copyright (c) 2001-2013, Sebastian Bergmann <sebastian@phpunit.de>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of Sebastian Bergmann nor the names of his
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* @package PHPUnit
* @subpackage Util
* @author Sebastian Bergmann <sebastian@phpunit.de>
* @copyright 2001-2013 Sebastian Bergmann <sebastian@phpunit.de>
* @license http://www.opensource.org/licenses/BSD-3-Clause The BSD 3-Clause License
* @link http://www.phpunit.de/
* @since File available since Release 3.6.0
*/
/**
* String helpers.
*
* @package PHPUnit
* @subpackage Util
* @author Sebastian Bergmann <sebastian@phpunit.de>
* @copyright 2001-2013 Sebastian Bergmann <sebastian@phpunit.de>
* @license http://www.opensource.org/licenses/BSD-3-Clause The BSD 3-Clause License
* @link http://www.phpunit.de/
* @since Class available since Release 3.6.0
*/
class PHPUnit_Util_String
{
/**
* Converts a string to UTF-8 encoding.
*
* @param string $string
* @return string
*/
public static function convertToUtf8($string)
{
if (!self::isUtf8($string)) {
if (function_exists('mb_convert_encoding')) {
$string = mb_convert_encoding($string, 'UTF-8');
} else {
$string = utf8_encode($string);
}
}
return $string;
}
/**
* Checks a string for UTF-8 encoding.
*
* @param string $string
* @return boolean
*/
protected static function isUtf8($string)
{
$length = strlen($string);
for ($i = 0; $i < $length; $i++) {
if (ord($string[$i]) < 0x80) {
$n = 0;
}
else if ((ord($string[$i]) & 0xE0) == 0xC0) {
$n = 1;
}
else if ((ord($string[$i]) & 0xF0) == 0xE0) {
$n = 2;
}
else if ((ord($string[$i]) & 0xF0) == 0xF0) {
$n = 3;
}
else {
return FALSE;
}
for ($j = 0; $j < $n; $j++) {
if ((++$i == $length) || ((ord($string[$i]) & 0xC0) != 0x80)) {
return FALSE;
}
}
}
return TRUE;
}
}
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