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<?php
/*
* Copyright 2011 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* Collection of static utility methods used for convenience across
* the client library.
*
* @author Chirag Shah <chirags@google.com>
*/
class Google_Utils
{
public static function urlSafeB64Encode($data)
{
$b64 = base64_encode($data);
$b64 = str_replace(
array('+', '/', '\r', '\n', '='),
array('-', '_'),
$b64
);
return $b64;
}
public static function urlSafeB64Decode($b64)
{
$b64 = str_replace(
array('-', '_'),
array('+', '/'),
$b64
);
return base64_decode($b64);
}
/**
* Misc function used to count the number of bytes in a post body, in the
* world of multi-byte chars and the unpredictability of
* strlen/mb_strlen/sizeof, this is the only way to do that in a sane
* manner at the moment.
*
* This algorithm was originally developed for the
* Solar Framework by Paul M. Jones
*
* @link http://solarphp.com/
* @link http://svn.solarphp.com/core/trunk/Solar/Json.php
* @link http://framework.zend.com/svn/framework/standard/trunk/library/Zend/Json/Decoder.php
* @param string $str
* @return int The number of bytes in a string.
*/
public static function getStrLen($str)
{
$strlenVar = strlen($str);
$d = $ret = 0;
for ($count = 0; $count < $strlenVar; ++ $count) {
$ordinalValue = ord($str{$ret});
switch (true) {
case (($ordinalValue >= 0x20) && ($ordinalValue <= 0x7F)):
// characters U-00000000 - U-0000007F (same as ASCII)
$ret ++;
break;
case (($ordinalValue & 0xE0) == 0xC0):
// characters U-00000080 - U-000007FF, mask 110XXXXX
// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
$ret += 2;
break;
case (($ordinalValue & 0xF0) == 0xE0):
// characters U-00000800 - U-0000FFFF, mask 1110XXXX
// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
$ret += 3;
break;
case (($ordinalValue & 0xF8) == 0xF0):
// characters U-00010000 - U-001FFFFF, mask 11110XXX
// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
$ret += 4;
break;
case (($ordinalValue & 0xFC) == 0xF8):
// characters U-00200000 - U-03FFFFFF, mask 111110XX
// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
$ret += 5;
break;
case (($ordinalValue & 0xFE) == 0xFC):
// characters U-04000000 - U-7FFFFFFF, mask 1111110X
// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
$ret += 6;
break;
default:
$ret ++;
}
}
return $ret;
}
/**
* Normalize all keys in an array to lower-case.
* @param array $arr
* @return array Normalized array.
*/
public static function normalize($arr)
{
if (!is_array($arr)) {
return array();
}
$normalized = array();
foreach ($arr as $key => $val) {
$normalized[strtolower($key)] = $val;
}
return $normalized;
}
/**
* Convert a string to camelCase
* @param string $value
* @return string
*/
public static function camelCase($value)
{
$value = ucwords(str_replace(array('-', '_'), ' ', $value));
$value = str_replace(' ', '', $value);
$value[0] = strtolower($value[0]);
return $value;
}
}