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323 lines
8.3 KiB
323 lines
8.3 KiB
<?php |
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/** |
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* Class for working with MO files |
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* |
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* @version $Id: mo.php 1157 2015-11-20 04:30:11Z dd32 $ |
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* @package pomo |
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* @subpackage mo |
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*/ |
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require_once dirname(__FILE__) . '/translations.php'; |
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require_once dirname(__FILE__) . '/streams.php'; |
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if ( ! class_exists( 'MO', false ) ): |
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class MO extends Gettext_Translations { |
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var $_nplurals = 2; |
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/** |
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* Loaded MO file. |
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* |
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* @var string |
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*/ |
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private $filename = ''; |
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/** |
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* Returns the loaded MO file. |
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* |
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* @return string The loaded MO file. |
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*/ |
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public function get_filename() { |
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return $this->filename; |
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} |
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/** |
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* Fills up with the entries from MO file $filename |
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* |
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* @param string $filename MO file to load |
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*/ |
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function import_from_file($filename) { |
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$reader = new POMO_FileReader( $filename ); |
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if ( ! $reader->is_resource() ) { |
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return false; |
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} |
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$this->filename = (string) $filename; |
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return $this->import_from_reader( $reader ); |
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} |
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/** |
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* @param string $filename |
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* @return bool |
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*/ |
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function export_to_file($filename) { |
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$fh = fopen($filename, 'wb'); |
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if ( !$fh ) return false; |
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$res = $this->export_to_file_handle( $fh ); |
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fclose($fh); |
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return $res; |
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} |
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/** |
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* @return string|false |
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*/ |
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function export() { |
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$tmp_fh = fopen("php://temp", 'r+'); |
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if ( !$tmp_fh ) return false; |
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$this->export_to_file_handle( $tmp_fh ); |
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rewind( $tmp_fh ); |
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return stream_get_contents( $tmp_fh ); |
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} |
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/** |
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* @param Translation_Entry $entry |
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* @return bool |
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*/ |
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function is_entry_good_for_export( $entry ) { |
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if ( empty( $entry->translations ) ) { |
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return false; |
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} |
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if ( !array_filter( $entry->translations ) ) { |
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return false; |
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} |
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return true; |
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} |
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/** |
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* @param resource $fh |
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* @return true |
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*/ |
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function export_to_file_handle($fh) { |
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$entries = array_filter( $this->entries, array( $this, 'is_entry_good_for_export' ) ); |
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ksort($entries); |
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$magic = 0x950412de; |
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$revision = 0; |
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$total = count($entries) + 1; // all the headers are one entry |
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$originals_lenghts_addr = 28; |
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$translations_lenghts_addr = $originals_lenghts_addr + 8 * $total; |
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$size_of_hash = 0; |
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$hash_addr = $translations_lenghts_addr + 8 * $total; |
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$current_addr = $hash_addr; |
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fwrite($fh, pack('V*', $magic, $revision, $total, $originals_lenghts_addr, |
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$translations_lenghts_addr, $size_of_hash, $hash_addr)); |
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fseek($fh, $originals_lenghts_addr); |
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// headers' msgid is an empty string |
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fwrite($fh, pack('VV', 0, $current_addr)); |
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$current_addr++; |
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$originals_table = chr(0); |
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$reader = new POMO_Reader(); |
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foreach($entries as $entry) { |
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$originals_table .= $this->export_original($entry) . chr(0); |
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$length = $reader->strlen($this->export_original($entry)); |
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fwrite($fh, pack('VV', $length, $current_addr)); |
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$current_addr += $length + 1; // account for the NULL byte after |
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} |
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$exported_headers = $this->export_headers(); |
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fwrite($fh, pack('VV', $reader->strlen($exported_headers), $current_addr)); |
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$current_addr += strlen($exported_headers) + 1; |
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$translations_table = $exported_headers . chr(0); |
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foreach($entries as $entry) { |
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$translations_table .= $this->export_translations($entry) . chr(0); |
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$length = $reader->strlen($this->export_translations($entry)); |
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fwrite($fh, pack('VV', $length, $current_addr)); |
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$current_addr += $length + 1; |
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} |
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fwrite($fh, $originals_table); |
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fwrite($fh, $translations_table); |
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return true; |
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} |
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/** |
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* @param Translation_Entry $entry |
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* @return string |
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*/ |
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function export_original($entry) { |
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//TODO: warnings for control characters |
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$exported = $entry->singular; |
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if ($entry->is_plural) $exported .= chr(0).$entry->plural; |
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if ($entry->context) $exported = $entry->context . chr(4) . $exported; |
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return $exported; |
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} |
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/** |
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* @param Translation_Entry $entry |
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* @return string |
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*/ |
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function export_translations($entry) { |
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//TODO: warnings for control characters |
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return $entry->is_plural ? implode(chr(0), $entry->translations) : $entry->translations[0]; |
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} |
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/** |
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* @return string |
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*/ |
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function export_headers() { |
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$exported = ''; |
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foreach($this->headers as $header => $value) { |
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$exported.= "$header: $value\n"; |
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} |
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return $exported; |
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} |
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/** |
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* @param int $magic |
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* @return string|false |
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*/ |
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function get_byteorder($magic) { |
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// The magic is 0x950412de |
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// bug in PHP 5.0.2, see https://savannah.nongnu.org/bugs/?func=detailitem&item_id=10565 |
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$magic_little = (int) - 1794895138; |
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$magic_little_64 = (int) 2500072158; |
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// 0xde120495 |
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$magic_big = ((int) - 569244523) & 0xFFFFFFFF; |
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if ($magic_little == $magic || $magic_little_64 == $magic) { |
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return 'little'; |
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} else if ($magic_big == $magic) { |
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return 'big'; |
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} else { |
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return false; |
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} |
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} |
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/** |
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* @param POMO_FileReader $reader |
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*/ |
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function import_from_reader($reader) { |
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$endian_string = MO::get_byteorder($reader->readint32()); |
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if (false === $endian_string) { |
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return false; |
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} |
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$reader->setEndian($endian_string); |
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$endian = ('big' == $endian_string)? 'N' : 'V'; |
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$header = $reader->read(24); |
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if ($reader->strlen($header) != 24) |
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return false; |
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// parse header |
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$header = unpack("{$endian}revision/{$endian}total/{$endian}originals_lenghts_addr/{$endian}translations_lenghts_addr/{$endian}hash_length/{$endian}hash_addr", $header); |
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if (!is_array($header)) |
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return false; |
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// support revision 0 of MO format specs, only |
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if ( $header['revision'] != 0 ) { |
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return false; |
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} |
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// seek to data blocks |
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$reader->seekto( $header['originals_lenghts_addr'] ); |
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// read originals' indices |
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$originals_lengths_length = $header['translations_lenghts_addr'] - $header['originals_lenghts_addr']; |
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if ( $originals_lengths_length != $header['total'] * 8 ) { |
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return false; |
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} |
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$originals = $reader->read($originals_lengths_length); |
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if ( $reader->strlen( $originals ) != $originals_lengths_length ) { |
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return false; |
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} |
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// read translations' indices |
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$translations_lenghts_length = $header['hash_addr'] - $header['translations_lenghts_addr']; |
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if ( $translations_lenghts_length != $header['total'] * 8 ) { |
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return false; |
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} |
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$translations = $reader->read($translations_lenghts_length); |
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if ( $reader->strlen( $translations ) != $translations_lenghts_length ) { |
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return false; |
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} |
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// transform raw data into set of indices |
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$originals = $reader->str_split( $originals, 8 ); |
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$translations = $reader->str_split( $translations, 8 ); |
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// skip hash table |
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$strings_addr = $header['hash_addr'] + $header['hash_length'] * 4; |
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$reader->seekto($strings_addr); |
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$strings = $reader->read_all(); |
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$reader->close(); |
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for ( $i = 0; $i < $header['total']; $i++ ) { |
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$o = unpack( "{$endian}length/{$endian}pos", $originals[$i] ); |
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$t = unpack( "{$endian}length/{$endian}pos", $translations[$i] ); |
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if ( !$o || !$t ) return false; |
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// adjust offset due to reading strings to separate space before |
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$o['pos'] -= $strings_addr; |
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$t['pos'] -= $strings_addr; |
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$original = $reader->substr( $strings, $o['pos'], $o['length'] ); |
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$translation = $reader->substr( $strings, $t['pos'], $t['length'] ); |
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if ('' === $original) { |
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$this->set_headers($this->make_headers($translation)); |
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} else { |
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$entry = &$this->make_entry($original, $translation); |
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$this->entries[$entry->key()] = &$entry; |
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} |
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} |
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return true; |
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} |
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/** |
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* Build a Translation_Entry from original string and translation strings, |
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* found in a MO file |
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* |
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* @static |
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* @param string $original original string to translate from MO file. Might contain |
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* 0x04 as context separator or 0x00 as singular/plural separator |
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* @param string $translation translation string from MO file. Might contain |
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* 0x00 as a plural translations separator |
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*/ |
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function &make_entry($original, $translation) { |
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$entry = new Translation_Entry(); |
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// look for context |
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$parts = explode(chr(4), $original); |
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if (isset($parts[1])) { |
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$original = $parts[1]; |
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$entry->context = $parts[0]; |
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} |
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// look for plural original |
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$parts = explode(chr(0), $original); |
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$entry->singular = $parts[0]; |
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if (isset($parts[1])) { |
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$entry->is_plural = true; |
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$entry->plural = $parts[1]; |
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} |
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// plural translations are also separated by \0 |
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$entry->translations = explode(chr(0), $translation); |
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return $entry; |
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} |
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/** |
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* @param int $count |
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* @return string |
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*/ |
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function select_plural_form($count) { |
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return $this->gettext_select_plural_form($count); |
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} |
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/** |
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* @return int |
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*/ |
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function get_plural_forms_count() { |
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return $this->_nplurals; |
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} |
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} |
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endif;
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