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