<?php
declare(strict_types=1);
namespace PhpMyAdmin\MoTranslator;
use PhpMyAdmin\MoTranslator\Cache\CacheInterface;
use function is_readable;
use function strcmp;
final class MoParser
{
/**
* None error.
*/
public const ERROR_NONE = 0;
/**
* File does not exist.
*/
public const ERROR_DOES_NOT_EXIST = 1;
/**
* File has bad magic number.
*/
public const ERROR_BAD_MAGIC = 2;
/**
* Error while reading file, probably too short.
*/
public const ERROR_READING = 3;
/**
* Big endian mo file magic bytes.
*/
public const MAGIC_BE = "\x95\x04\x12\xde";
/**
* Little endian mo file magic bytes.
*/
public const MAGIC_LE = "\xde\x12\x04\x95";
/**
* Parse error code (0 if no error).
*
* @var int
*/
public $error = self::ERROR_NONE;
/** @var string|null */
private $filename;
public function __construct(?string $filename)
{
$this->filename = $filename;
}
/**
* Parses .mo file and stores results to `$cache`
*/
public function parseIntoCache(CacheInterface $cache): void
{
if ($this->filename === null) {
return;
}
if (! is_readable($this->filename)) {
$this->error = self::ERROR_DOES_NOT_EXIST;
return;
}
$stream = new StringReader($this->filename);
try {
$magic = $stream->read(0, 4);
if (strcmp($magic, self::MAGIC_LE) === 0) {
$unpack = 'V';
} elseif (strcmp($magic, self::MAGIC_BE) === 0) {
$unpack = 'N';
} else {
$this->error = self::ERROR_BAD_MAGIC;
return;
}
/* Parse header */
$total = $stream->readint($unpack, 8);
$originals = $stream->readint($unpack, 12);
$translations = $stream->readint($unpack, 16);
/* get original and translations tables */
$totalTimesTwo = (int) ($total * 2);// Fix for issue #36 on ARM
$tableOriginals = $stream->readintarray($unpack, $originals, $totalTimesTwo);
$tableTranslations = $stream->readintarray($unpack, $translations, $totalTimesTwo);
/* read all strings to the cache */
for ($i = 0; $i < $total; ++$i) {
$iTimesTwo = $i * 2;
$iPlusOne = $iTimesTwo + 1;
$iPlusTwo = $iTimesTwo + 2;
$original = $stream->read($tableOriginals[$iPlusTwo], $tableOriginals[$iPlusOne]);
$translation = $stream->read($tableTranslations[$iPlusTwo], $tableTranslations[$iPlusOne]);
$cache->set($original, $translation);
}
} catch (ReaderException $e) {
$this->error = self::ERROR_READING;
return;
}
}
}