144 lines
4.3 KiB
PHP
144 lines
4.3 KiB
PHP
<?php
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namespace App\LaravelGettext\FileLoader;
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use Symfony\Component\Translation\Exception\InvalidResourceException;
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use Symfony\Component\Translation\Loader\FileLoader;
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/**
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* @copyright Copyright (c) 2010, Union of RAD http://union-of-rad.org (http://lithify.me/)
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*/
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class MoFileLoader extends FileLoader
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{
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/**
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* Magic used for validating the format of a MO file as well as
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* detecting if the machine used to create that file was little endian.
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*
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* @var float
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*/
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const MO_LITTLE_ENDIAN_MAGIC = 0x950412de;
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/**
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* Magic used for validating the format of a MO file as well as
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* detecting if the machine used to create that file was big endian.
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*
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* @var float
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*/
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const MO_BIG_ENDIAN_MAGIC = 0xde120495;
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/**
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* The size of the header of a MO file in bytes.
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*
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* @var int Number of bytes
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*/
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const MO_HEADER_SIZE = 28;
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/**
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* Parses machine object (MO) format, independent of the machine's endian it
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* was created on. Both 32bit and 64bit systems are supported.
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*
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* {@inheritdoc}
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*/
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protected function loadResource(string $resource): array
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{
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$stream = fopen($resource, 'r');
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$stat = fstat($stream);
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if ($stat['size'] < self::MO_HEADER_SIZE) {
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throw new InvalidResourceException('MO stream content has an invalid format.');
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}
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$magic = unpack('V1', fread($stream, 4));
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$magic = hexdec(substr(dechex(current($magic)), -8));
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if ($magic == self::MO_LITTLE_ENDIAN_MAGIC) {
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$isBigEndian = false;
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} elseif ($magic == self::MO_BIG_ENDIAN_MAGIC) {
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$isBigEndian = true;
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} else {
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throw new InvalidResourceException('MO stream content has an invalid format.');
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}
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// formatRevision
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$this->readLong($stream, $isBigEndian);
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$count = $this->readLong($stream, $isBigEndian);
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$offsetId = $this->readLong($stream, $isBigEndian);
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$offsetTranslated = $this->readLong($stream, $isBigEndian);
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// sizeHashes
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$this->readLong($stream, $isBigEndian);
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// offsetHashes
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$this->readLong($stream, $isBigEndian);
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$messages = array();
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for ($i = 0; $i < $count; ++$i) {
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$pluralId = null;
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$translated = null;
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fseek($stream, $offsetId + $i * 8);
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$length = $this->readLong($stream, $isBigEndian);
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$offset = $this->readLong($stream, $isBigEndian);
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if ($length < 1) {
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continue;
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}
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fseek($stream, $offset);
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$singularId = fread($stream, $length);
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if (strpos($singularId, "\000") !== false) {
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list($singularId, $pluralId) = explode("\000", $singularId);
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}
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fseek($stream, $offsetTranslated + $i * 8);
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$length = $this->readLong($stream, $isBigEndian);
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$offset = $this->readLong($stream, $isBigEndian);
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if ($length < 1) {
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continue;
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}
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fseek($stream, $offset);
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$translated = fread($stream, $length);
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if (strpos($translated, "\000") !== false) {
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$translated = explode("\000", $translated);
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}
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$ids = array('singular' => $singularId, 'plural' => $pluralId);
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$item = compact('ids', 'translated');
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if (is_array($item['translated'])) {
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$messages[$item['ids']['singular']] = stripcslashes($item['translated'][0]);
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if (isset($item['ids']['plural'])) {
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$messages[$item['ids']['plural']] = stripcslashes(implode('|', $item['translated']));
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}
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} elseif (!empty($item['ids']['singular'])) {
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$messages[$item['ids']['singular']] = stripcslashes($item['translated']);
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}
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}
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fclose($stream);
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return array_filter($messages);
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}
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/**
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* Reads an unsigned long from stream respecting endianess.
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*
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* @param resource $stream
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* @param bool $isBigEndian
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*
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* @return int
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*/
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private function readLong($stream, $isBigEndian)
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{
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$result = unpack($isBigEndian ? 'N1' : 'V1', fread($stream, 4));
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$result = current($result);
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return (int) substr($result, -8);
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}
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}
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