function import_from_reader($reader)
{
$endian_string = MO::get_byteorder($reader->readint32());
if (FALSE === $endian_string) {
return FALSE;
}
$reader->setEndian($endian_string);
$endian = 'big' == $endian_string ? 'N' : 'V';
$header = $reader->read(24);
if ($reader->strlen($header) != 24) {
return FALSE;
}
// parse header
$header = unpack("{$endian}revision/{$endian}total/{$endian}originals_lenghts_addr/{$endian}translations_lenghts_addr/{$endian}hash_length/{$endian}hash_addr", $header);
if (!is_array($header)) {
return FALSE;
}
extract($header);
// support revision 0 of MO format specs, only
if ($revision != 0) {
return FALSE;
}
// seek to data blocks
$reader->seekto($originals_lenghts_addr);
// read originals' indices
$originals_lengths_length = $translations_lenghts_addr - $originals_lenghts_addr;
if ($originals_lengths_length != $total * 8) {
return FALSE;
}
$originals = $reader->read($originals_lengths_length);
if ($reader->strlen($originals) != $originals_lengths_length) {
return FALSE;
}
// read translations' indices
$translations_lenghts_length = $hash_addr - $translations_lenghts_addr;
if ($translations_lenghts_length != $total * 8) {
return FALSE;
}
$translations = $reader->read($translations_lenghts_length);
if ($reader->strlen($translations) != $translations_lenghts_length) {
return FALSE;
}
// transform raw data into set of indices
$originals = $reader->str_split($originals, 8);
$translations = $reader->str_split($translations, 8);
// skip hash table
$strings_addr = $hash_addr + $hash_length * 4;
$reader->seekto($strings_addr);
$strings = $reader->read_all();
$reader->close();
for ($i = 0; $i < $total; $i++) {
$o = unpack("{$endian}length/{$endian}pos", $originals[$i]);
$t = unpack("{$endian}length/{$endian}pos", $translations[$i]);
if (!$o || !$t) {
return FALSE;
}
// adjust offset due to reading strings to separate space before
$o['pos'] -= $strings_addr;
$t['pos'] -= $strings_addr;
$original = $reader->substr($strings, $o['pos'], $o['length']);
$translation = $reader->substr($strings, $t['pos'], $t['length']);
if ('' === $original) {
$this->set_headers($this->make_headers($translation));
} else {
$entry =& $this->make_entry($original, $translation);
$this->entries[$entry->key()] =& $entry;
}
}
return TRUE;
}