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MoFileLoader.php
116 lines
| 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 | namespace IAWPSCOPED\Symfony\Component\Translation\Loader; |
| 12 | |
| 13 | use IAWPSCOPED\Symfony\Component\Translation\Exception\InvalidResourceException; |
| 14 | /** |
| 15 | * @copyright Copyright (c) 2010, Union of RAD http://union-of-rad.org (http://lithify.me/) |
| 16 | * @internal |
| 17 | */ |
| 18 | class MoFileLoader extends FileLoader |
| 19 | { |
| 20 | /** |
| 21 | * Magic used for validating the format of an MO file as well as |
| 22 | * detecting if the machine used to create that file was little endian. |
| 23 | */ |
| 24 | public const MO_LITTLE_ENDIAN_MAGIC = 0x950412de; |
| 25 | /** |
| 26 | * Magic used for validating the format of an MO file as well as |
| 27 | * detecting if the machine used to create that file was big endian. |
| 28 | */ |
| 29 | public const MO_BIG_ENDIAN_MAGIC = 0xde120495; |
| 30 | /** |
| 31 | * The size of the header of an MO file in bytes. |
| 32 | */ |
| 33 | public const MO_HEADER_SIZE = 28; |
| 34 | /** |
| 35 | * Parses machine object (MO) format, independent of the machine's endian it |
| 36 | * was created on. Both 32bit and 64bit systems are supported. |
| 37 | * |
| 38 | * {@inheritdoc} |
| 39 | */ |
| 40 | protected function loadResource(string $resource) : array |
| 41 | { |
| 42 | $stream = \fopen($resource, 'r'); |
| 43 | $stat = \fstat($stream); |
| 44 | if ($stat['size'] < self::MO_HEADER_SIZE) { |
| 45 | throw new InvalidResourceException('MO stream content has an invalid format.'); |
| 46 | } |
| 47 | $magic = \unpack('V1', \fread($stream, 4)); |
| 48 | $magic = \hexdec(\substr(\dechex(\current($magic)), -8)); |
| 49 | if (self::MO_LITTLE_ENDIAN_MAGIC == $magic) { |
| 50 | $isBigEndian = \false; |
| 51 | } elseif (self::MO_BIG_ENDIAN_MAGIC == $magic) { |
| 52 | $isBigEndian = \true; |
| 53 | } else { |
| 54 | throw new InvalidResourceException('MO stream content has an invalid format.'); |
| 55 | } |
| 56 | // formatRevision |
| 57 | $this->readLong($stream, $isBigEndian); |
| 58 | $count = $this->readLong($stream, $isBigEndian); |
| 59 | $offsetId = $this->readLong($stream, $isBigEndian); |
| 60 | $offsetTranslated = $this->readLong($stream, $isBigEndian); |
| 61 | // sizeHashes |
| 62 | $this->readLong($stream, $isBigEndian); |
| 63 | // offsetHashes |
| 64 | $this->readLong($stream, $isBigEndian); |
| 65 | $messages = []; |
| 66 | for ($i = 0; $i < $count; ++$i) { |
| 67 | $pluralId = null; |
| 68 | $translated = null; |
| 69 | \fseek($stream, $offsetId + $i * 8); |
| 70 | $length = $this->readLong($stream, $isBigEndian); |
| 71 | $offset = $this->readLong($stream, $isBigEndian); |
| 72 | if ($length < 1) { |
| 73 | continue; |
| 74 | } |
| 75 | \fseek($stream, $offset); |
| 76 | $singularId = \fread($stream, $length); |
| 77 | if (\str_contains($singularId, "\x00")) { |
| 78 | [$singularId, $pluralId] = \explode("\x00", $singularId); |
| 79 | } |
| 80 | \fseek($stream, $offsetTranslated + $i * 8); |
| 81 | $length = $this->readLong($stream, $isBigEndian); |
| 82 | $offset = $this->readLong($stream, $isBigEndian); |
| 83 | if ($length < 1) { |
| 84 | continue; |
| 85 | } |
| 86 | \fseek($stream, $offset); |
| 87 | $translated = \fread($stream, $length); |
| 88 | if (\str_contains($translated, "\x00")) { |
| 89 | $translated = \explode("\x00", $translated); |
| 90 | } |
| 91 | $ids = ['singular' => $singularId, 'plural' => $pluralId]; |
| 92 | $item = \compact('ids', 'translated'); |
| 93 | if (!empty($item['ids']['singular'])) { |
| 94 | $id = $item['ids']['singular']; |
| 95 | if (isset($item['ids']['plural'])) { |
| 96 | $id .= '|' . $item['ids']['plural']; |
| 97 | } |
| 98 | $messages[$id] = \stripcslashes(\implode('|', (array) $item['translated'])); |
| 99 | } |
| 100 | } |
| 101 | \fclose($stream); |
| 102 | return \array_filter($messages); |
| 103 | } |
| 104 | /** |
| 105 | * Reads an unsigned long from stream respecting endianness. |
| 106 | * |
| 107 | * @param resource $stream |
| 108 | */ |
| 109 | private function readLong($stream, bool $isBigEndian) : int |
| 110 | { |
| 111 | $result = \unpack($isBigEndian ? 'N1' : 'V1', \fread($stream, 4)); |
| 112 | $result = \current($result); |
| 113 | return (int) \substr($result, -8); |
| 114 | } |
| 115 | } |
| 116 |