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