Builtin.php
3 years ago
CRC32.php
3 years ago
CRCInterface.php
3 years ago
CRCTrait.php
3 years ago
Google.php
3 years ago
PHP.php
3 years ago
PHPSlicedBy4.php
3 years ago
Table.php
3 years ago
CRCTrait.php
55 lines
| 1 | <?php |
| 2 | /** |
| 3 | * Copyright 2019 Google LLC |
| 4 | * |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | * you may not use this file except in compliance with the License. |
| 7 | * You may obtain a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | namespace Google\CRC32; |
| 19 | |
| 20 | trait CRCTrait |
| 21 | { |
| 22 | /** |
| 23 | * Converts a integer into a 8 character hex string in lower case. |
| 24 | * |
| 25 | * @param integer $i Integer to convert. |
| 26 | * |
| 27 | * @return string 8 character hex string in lower case. |
| 28 | */ |
| 29 | private static function int2hex($i) |
| 30 | { |
| 31 | return str_pad(dechex($i), 8, '0', STR_PAD_LEFT); |
| 32 | } |
| 33 | |
| 34 | /** |
| 35 | * { function_description } |
| 36 | * |
| 37 | * @param integer $crc The CRC hash |
| 38 | * @param boolean $raw_output When set to TRUE, outputs raw binary data. |
| 39 | * FALSE outputs lowercase hexits. |
| 40 | * |
| 41 | * @return string Returns a string containing the calculated CRC as |
| 42 | * lowercase hexits unless raw_output is set to true in |
| 43 | * which case the raw binary representation of the CRC is |
| 44 | * returned. |
| 45 | */ |
| 46 | private static function crcHash($crc, $raw_output) |
| 47 | { |
| 48 | $crc = $crc & 0xffffffff; |
| 49 | if ($raw_output) { |
| 50 | return pack('N', $crc); |
| 51 | } |
| 52 | return self::int2hex($crc); |
| 53 | } |
| 54 | } |
| 55 |