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
Google.php
68 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 | use Google\CRC32\CRC32; |
| 21 | use Google\CRC32\CRCInterface; |
| 22 | |
| 23 | /** |
| 24 | * A CRC32 implementation using hardware acceleration. |
| 25 | * |
| 26 | * This uses the C++ https://github.com/google/crc32c library, thus depends on |
| 27 | * the `crc32c` PHP extension. |
| 28 | */ |
| 29 | final class Google implements CRCInterface |
| 30 | { |
| 31 | public static function supports($algo) |
| 32 | { |
| 33 | return $algo === CRC32::CASTAGNOLI; |
| 34 | } |
| 35 | |
| 36 | public function __construct() |
| 37 | { |
| 38 | if (!function_exists('crc32c')) { |
| 39 | throw new \InvalidArgumentException("crc32c function not found. Please load the 'crc32c' extension."); |
| 40 | } |
| 41 | |
| 42 | $this->reset(); |
| 43 | } |
| 44 | |
| 45 | public function reset() |
| 46 | { |
| 47 | $this->crc = hex2bin('00000000'); |
| 48 | } |
| 49 | |
| 50 | public function update($data) |
| 51 | { |
| 52 | $this->crc = crc32c($data, $this->crc); |
| 53 | } |
| 54 | |
| 55 | public function hash($raw_output = null) |
| 56 | { |
| 57 | if ($raw_output === true) { |
| 58 | return $this->crc; |
| 59 | } |
| 60 | return bin2hex($this->crc); |
| 61 | } |
| 62 | |
| 63 | public function version() |
| 64 | { |
| 65 | return 'Hardware accelerated (https://github.com/google/crc32c)'; |
| 66 | } |
| 67 | } |
| 68 |