MO::export_to_file_handle( resource $fh )

	function export_to_file_handle($fh) {
		$entries = array_filter( $this->entries, array( $this, 'is_entry_good_for_export' ) );
		ksort($entries);
		$magic = 0x950412de;
		$revision = 0;
		$total = count($entries) + 1; // all the headers are one entry
		$originals_lenghts_addr = 28;
		$translations_lenghts_addr = $originals_lenghts_addr + 8 * $total;
		$size_of_hash = 0;
		$hash_addr = $translations_lenghts_addr + 8 * $total;
		$current_addr = $hash_addr;
		fwrite($fh, pack('V*', $magic, $revision, $total, $originals_lenghts_addr,
			$translations_lenghts_addr, $size_of_hash, $hash_addr));
		fseek($fh, $originals_lenghts_addr);

		// headers' msgid is an empty string
		fwrite($fh, pack('VV', 0, $current_addr));
		$current_addr++;
		$originals_table = chr(0);

		$reader = new POMO_Reader();

		foreach($entries as $entry) {
			$originals_table .= $this->export_original($entry) . chr(0);
			$length = $reader->strlen($this->export_original($entry));
			fwrite($fh, pack('VV', $length, $current_addr));
			$current_addr += $length + 1; // account for the NULL byte after
		}

		$exported_headers = $this->export_headers();
		fwrite($fh, pack('VV', $reader->strlen($exported_headers), $current_addr));
		$current_addr += strlen($exported_headers) + 1;
		$translations_table = $exported_headers . chr(0);

		foreach($entries as $entry) {
			$translations_table .= $this->export_translations($entry) . chr(0);
			$length = $reader->strlen($this->export_translations($entry));
			fwrite($fh, pack('VV', $length, $current_addr));
			$current_addr += $length + 1;
		}

		fwrite($fh, $originals_table);
		fwrite($fh, $translations_table);
		return true;
	}