| 1 |
<?php |
| 2 |
declare(strict_types = 1); |
| 3 |
|
| 4 |
namespace Gettext\Loader; |
| 5 |
|
| 6 |
use Exception; |
| 7 |
use Gettext\Translations; |
| 8 |
|
| 9 |
/** |
| 10 |
* Class to load a MO file. |
| 11 |
*/ |
| 12 |
final class MoLoader extends Loader |
| 13 |
{ |
| 14 |
private $string; |
| 15 |
private $position; |
| 16 |
private $length; |
| 17 |
|
| 18 |
private const MAGIC1 = -1794895138; |
| 19 |
private const MAGIC2 = -569244523; |
| 20 |
private const MAGIC3 = 2500072158; |
| 21 |
|
| 22 |
public function loadString(string $string, ?Translations $translations = null): Translations |
| 23 |
{ |
| 24 |
$translations = parent::loadString($string, $translations); |
| 25 |
$this->init($string); |
| 26 |
|
| 27 |
$magic = $this->readInt('V'); |
| 28 |
|
| 29 |
if (($magic === self::MAGIC1) || ($magic === self::MAGIC3)) { //to make sure it works for 64-bit platforms |
| 30 |
$byteOrder = 'V'; //low endian |
| 31 |
} elseif ($magic === (self::MAGIC2 & 0xFFFFFFFF)) { |
| 32 |
$byteOrder = 'N'; //big endian |
| 33 |
} else { |
| 34 |
throw new Exception('Not MO file'); |
| 35 |
} |
| 36 |
|
| 37 |
$this->readInt($byteOrder); |
| 38 |
|
| 39 |
$total = $this->readInt($byteOrder); //total string count |
| 40 |
$originals = $this->readInt($byteOrder); //offset of original table |
| 41 |
$tran = $this->readInt($byteOrder); //offset of translation table |
| 42 |
|
| 43 |
$this->seekto($originals); |
| 44 |
$table_originals = $this->readIntArray($byteOrder, $total * 2); |
| 45 |
|
| 46 |
$this->seekto($tran); |
| 47 |
$table_translations = $this->readIntArray($byteOrder, $total * 2); |
| 48 |
|
| 49 |
for ($i = 0; $i < $total; ++$i) { |
| 50 |
$next = $i * 2; |
| 51 |
|
| 52 |
$this->seekto($table_originals[$next + 2]); |
| 53 |
$original = $this->read($table_originals[$next + 1]); |
| 54 |
|
| 55 |
$this->seekto($table_translations[$next + 2]); |
| 56 |
$translated = $this->read($table_translations[$next + 1]); |
| 57 |
|
| 58 |
// Headers |
| 59 |
if ($original === '') { |
| 60 |
foreach (explode("\n", $translated) as $headerLine) { |
| 61 |
if ($headerLine === '') { |
| 62 |
continue; |
| 63 |
} |
| 64 |
|
| 65 |
$headerChunks = preg_split('/:\s*/', $headerLine, 2); |
| 66 |
$translations->getHeaders()->set($headerChunks[0], isset($headerChunks[1]) ? $headerChunks[1] : ''); |
| 67 |
} |
| 68 |
|
| 69 |
continue; |
| 70 |
} |
| 71 |
|
| 72 |
$context = $plural = null; |
| 73 |
$chunks = explode("\x04", $original, 2); |
| 74 |
|
| 75 |
if (isset($chunks[1])) { |
| 76 |
list($context, $original) = $chunks; |
| 77 |
} |
| 78 |
|
| 79 |
$chunks = explode("\x00", $original, 2); |
| 80 |
|
| 81 |
if (isset($chunks[1])) { |
| 82 |
list($original, $plural) = $chunks; |
| 83 |
} |
| 84 |
|
| 85 |
$translation = $this->createTranslation($context, $original, $plural); |
| 86 |
$translations->add($translation); |
| 87 |
|
| 88 |
if ($translated === '') { |
| 89 |
continue; |
| 90 |
} |
| 91 |
|
| 92 |
if ($plural === null) { |
| 93 |
$translation->translate($translated); |
| 94 |
continue; |
| 95 |
} |
| 96 |
|
| 97 |
$v = explode("\x00", $translated); |
| 98 |
$translation->translate(array_shift($v)); |
| 99 |
$translation->translatePlural(...array_filter($v)); |
| 100 |
} |
| 101 |
|
| 102 |
return $translations; |
| 103 |
} |
| 104 |
|
| 105 |
private function init(string $string): void |
| 106 |
{ |
| 107 |
$this->string = $string; |
| 108 |
$this->position = 0; |
| 109 |
$this->length = strlen($string); |
| 110 |
} |
| 111 |
|
| 112 |
private function read(int $bytes): string |
| 113 |
{ |
| 114 |
$data = substr($this->string, $this->position, $bytes); |
| 115 |
|
| 116 |
$this->seekTo($this->position + $bytes); |
| 117 |
|
| 118 |
return $data; |
| 119 |
} |
| 120 |
|
| 121 |
private function seekTo(int $position): void |
| 122 |
{ |
| 123 |
$this->position = ($this->length < $position) ? $this->length : $position; |
| 124 |
} |
| 125 |
|
| 126 |
private function readInt(string $byteOrder): int |
| 127 |
{ |
| 128 |
if (($read = $this->read(4)) === false) { |
| 129 |
return 0; |
| 130 |
} |
| 131 |
|
| 132 |
$read = (array) unpack($byteOrder, $read); |
| 133 |
|
| 134 |
return (int) array_shift($read); |
| 135 |
} |
| 136 |
|
| 137 |
private function readIntArray(string $byteOrder, int $count): array |
| 138 |
{ |
| 139 |
return unpack($byteOrder.$count, $this->read(4 * $count)) ?: []; |
| 140 |
} |
| 141 |
} |
| 142 |
|
