Matthias Andreas Benkard | 7b2a3a1 | 2021-08-16 10:57:25 +0200 | [diff] [blame] | 1 | <?php |
| 2 | |
| 3 | /* |
| 4 | * This file is part of the Symfony package. |
| 5 | * |
| 6 | * (c) Fabien Potencier <fabien@symfony.com> |
| 7 | * |
| 8 | * For the full copyright and license information, please view the LICENSE |
| 9 | * file that was distributed with this source code. |
| 10 | */ |
| 11 | |
| 12 | namespace Symfony\Component\Translation\Loader; |
| 13 | |
| 14 | use Symfony\Component\Translation\Exception\InvalidResourceException; |
| 15 | |
| 16 | /** |
| 17 | * @copyright Copyright (c) 2010, Union of RAD http://union-of-rad.org (http://lithify.me/) |
| 18 | */ |
| 19 | class MoFileLoader extends FileLoader |
| 20 | { |
| 21 | /** |
| 22 | * Magic used for validating the format of an MO file as well as |
| 23 | * detecting if the machine used to create that file was little endian. |
| 24 | */ |
Matthias Andreas Benkard | 1ba5381 | 2022-12-27 17:32:58 +0100 | [diff] [blame^] | 25 | public const MO_LITTLE_ENDIAN_MAGIC = 0x950412DE; |
Matthias Andreas Benkard | 7b2a3a1 | 2021-08-16 10:57:25 +0200 | [diff] [blame] | 26 | |
| 27 | /** |
| 28 | * Magic used for validating the format of an MO file as well as |
| 29 | * detecting if the machine used to create that file was big endian. |
| 30 | */ |
Matthias Andreas Benkard | 1ba5381 | 2022-12-27 17:32:58 +0100 | [diff] [blame^] | 31 | public const MO_BIG_ENDIAN_MAGIC = 0xDE120495; |
Matthias Andreas Benkard | 7b2a3a1 | 2021-08-16 10:57:25 +0200 | [diff] [blame] | 32 | |
| 33 | /** |
| 34 | * The size of the header of an MO file in bytes. |
| 35 | */ |
| 36 | public const MO_HEADER_SIZE = 28; |
| 37 | |
| 38 | /** |
| 39 | * Parses machine object (MO) format, independent of the machine's endian it |
| 40 | * was created on. Both 32bit and 64bit systems are supported. |
| 41 | * |
| 42 | * {@inheritdoc} |
| 43 | */ |
Matthias Andreas Benkard | 1ba5381 | 2022-12-27 17:32:58 +0100 | [diff] [blame^] | 44 | protected function loadResource(string $resource): array |
Matthias Andreas Benkard | 7b2a3a1 | 2021-08-16 10:57:25 +0200 | [diff] [blame] | 45 | { |
| 46 | $stream = fopen($resource, 'r'); |
| 47 | |
| 48 | $stat = fstat($stream); |
| 49 | |
| 50 | if ($stat['size'] < self::MO_HEADER_SIZE) { |
| 51 | throw new InvalidResourceException('MO stream content has an invalid format.'); |
| 52 | } |
| 53 | $magic = unpack('V1', fread($stream, 4)); |
| 54 | $magic = hexdec(substr(dechex(current($magic)), -8)); |
| 55 | |
| 56 | if (self::MO_LITTLE_ENDIAN_MAGIC == $magic) { |
| 57 | $isBigEndian = false; |
| 58 | } elseif (self::MO_BIG_ENDIAN_MAGIC == $magic) { |
| 59 | $isBigEndian = true; |
| 60 | } else { |
| 61 | throw new InvalidResourceException('MO stream content has an invalid format.'); |
| 62 | } |
| 63 | |
| 64 | // formatRevision |
| 65 | $this->readLong($stream, $isBigEndian); |
| 66 | $count = $this->readLong($stream, $isBigEndian); |
| 67 | $offsetId = $this->readLong($stream, $isBigEndian); |
| 68 | $offsetTranslated = $this->readLong($stream, $isBigEndian); |
| 69 | // sizeHashes |
| 70 | $this->readLong($stream, $isBigEndian); |
| 71 | // offsetHashes |
| 72 | $this->readLong($stream, $isBigEndian); |
| 73 | |
| 74 | $messages = []; |
| 75 | |
| 76 | for ($i = 0; $i < $count; ++$i) { |
| 77 | $pluralId = null; |
| 78 | $translated = null; |
| 79 | |
| 80 | fseek($stream, $offsetId + $i * 8); |
| 81 | |
| 82 | $length = $this->readLong($stream, $isBigEndian); |
| 83 | $offset = $this->readLong($stream, $isBigEndian); |
| 84 | |
| 85 | if ($length < 1) { |
| 86 | continue; |
| 87 | } |
| 88 | |
| 89 | fseek($stream, $offset); |
| 90 | $singularId = fread($stream, $length); |
| 91 | |
| 92 | if (str_contains($singularId, "\000")) { |
| 93 | [$singularId, $pluralId] = explode("\000", $singularId); |
| 94 | } |
| 95 | |
| 96 | fseek($stream, $offsetTranslated + $i * 8); |
| 97 | $length = $this->readLong($stream, $isBigEndian); |
| 98 | $offset = $this->readLong($stream, $isBigEndian); |
| 99 | |
| 100 | if ($length < 1) { |
| 101 | continue; |
| 102 | } |
| 103 | |
| 104 | fseek($stream, $offset); |
| 105 | $translated = fread($stream, $length); |
| 106 | |
| 107 | if (str_contains($translated, "\000")) { |
| 108 | $translated = explode("\000", $translated); |
| 109 | } |
| 110 | |
| 111 | $ids = ['singular' => $singularId, 'plural' => $pluralId]; |
| 112 | $item = compact('ids', 'translated'); |
| 113 | |
| 114 | if (!empty($item['ids']['singular'])) { |
| 115 | $id = $item['ids']['singular']; |
| 116 | if (isset($item['ids']['plural'])) { |
| 117 | $id .= '|'.$item['ids']['plural']; |
| 118 | } |
| 119 | $messages[$id] = stripcslashes(implode('|', (array) $item['translated'])); |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | fclose($stream); |
| 124 | |
| 125 | return array_filter($messages); |
| 126 | } |
| 127 | |
| 128 | /** |
| 129 | * Reads an unsigned long from stream respecting endianness. |
| 130 | * |
| 131 | * @param resource $stream |
| 132 | */ |
| 133 | private function readLong($stream, bool $isBigEndian): int |
| 134 | { |
| 135 | $result = unpack($isBigEndian ? 'N1' : 'V1', fread($stream, 4)); |
| 136 | $result = current($result); |
| 137 | |
| 138 | return (int) substr($result, -8); |
| 139 | } |
| 140 | } |