/**
* Transform a Stringset to a string in the binary mo format.
* @param Stringset $set
* @return string
*/
public static function toString(Stringset $set, $add_hash_table = true)
{
$set->sort();
if ($add_hash_table) {
$hash_table_size = self::nextPrime((int) ($set->size() * 4 / 3));
if ($hash_table_size <= 2) {
$hash_table_size = 3;
}
} else {
$hash_table_size = 0;
}
$ostart = 7 * 4;
$tstart = $ostart + $set->size() * 8;
$hstart = $tstart + $set->size() * 8;
$ovstart = $hstart + $hash_table_size * (self::INT_SIZE / 8);
$str = '';
$str .= pack('LL', self::MAGIC_NUMBER, self::REVISION);
// magic number and revision
$str .= pack('L', $set->size());
// number of strings
$str .= pack('L', $ostart);
// start of original strings at 7 words
$str .= pack('L', $tstart);
// start of translated strings, 2 words per entry
$str .= pack('L', $hash_table_size);
// size of hashtable
$str .= pack('L', $hstart);
// start of hashtable
$ids = '';
$lengths = array();
for ($i = 0; $i < $set->size(); $i += 1) {
$item = $set->item($i);
$id = $item['id'];
if ($item['context'] !== null) {
$id = $item['context'] . self::EOT . $id;
}
if ($item['plural'] !== null) {
$id = $id . self::NUL . $item['plural'];
}
$str .= pack('LL', strlen($id), $ovstart + strlen($ids));
$ids .= $id . self::NUL;
}
$tvstart = $ovstart + strlen($ids);
$values = '';
for ($i = 0; $i < $set->size(); $i += 1) {
$item = $set->item($i);
$value = implode(self::NUL, $item['strings']);
$str .= pack('LL', strlen($value), $tvstart + strlen($values));
$values .= $value . self::NUL;
}
if ($add_hash_table) {
$hashtable = self::makeHashTable($set, $hash_table_size);
foreach ($hashtable as $hash) {
$str .= pack('L', $hash);
}
}
$str .= $ids;
$str .= $values;
return $str;
}
