wp-includes/pomo/mo.php

   1 <?php
   2 /**
   3  * Class for working with MO files
   4  *
   5  * @version $Id: mo.php 33 2009-02-16 09:33:39Z nbachiyski $
   6  * @package pomo
   7  * @subpackage mo
   8  */
   9
  10 require_once dirname(__FILE__) . '/translations.php';
  11 require_once dirname(__FILE__) . '/streams.php';
  12
  13 class MO extends Translations {
  14
  15         var $_nplurals = 2;
  16
  17         function set_header($header, $value) {
  18                 parent::set_header($header, $value);
  19                 if ('Plural-Forms' == $header)
  20                         $this->_gettext_select_plural_form = $this->_make_gettext_select_plural_form($value);
  21         }
  22
  23         /**
  24          * Fills up with the entries from MO file $filename
  25          *
  26          * @param string $filename MO file to load
  27          */
  28         function import_from_file($filename) {
  29                 $reader = new POMO_CachedIntFileReader($filename);
  30                 if (isset($reader->error)) {
  31                         return false;
  32                 }
  33                 return $this->import_from_reader($reader);
  34         }
  35
  36         function get_byteorder($magic) {
  37
  38                 // The magic is 0x950412de
  39
  40                 // bug in PHP 5.0.2, see https://savannah.nongnu.org/bugs/?func=detailitem&item_id=10565
  41                 $magic_little = (int) - 1794895138;
  42                 $magic_little_64 = (int) 2500072158;
  43                 // 0xde120495
  44                 $magic_big = ((int) - 569244523) && 0xFFFFFFFF;
  45
  46                 if ($magic_little == $magic || $magic_little_64 == $magic) {
  47                         return 'little';
  48                 } else if ($magic_big == $magic) {
  49                         return 'big';
  50                 } else {
  51                         return false;
  52                 }
  53         }
  54
  55         function import_from_reader($reader) {
  56                 $reader->setEndian('little');
  57                 $endian = MO::get_byteorder($reader->readint32());
  58                 if (false === $endian) {
  59                         return false;
  60                 }
  61                 $reader->setEndian($endian);
  62
  63                 $revision = $reader->readint32();
  64                 $total = $reader->readint32();
  65                 // get addresses of array of lenghts and offsets for original string and translations
  66                 $originals_lo_addr = $reader->readint32();
  67                 $translations_lo_addr = $reader->readint32();
  68
  69                 $reader->seekto($originals_lo_addr);
  70                 $originals_lo = $reader->readint32array($total * 2); // each of
  71                 $reader->seekto($translations_lo_addr);
  72                 $translations_lo = $reader->readint32array($total * 2);
  73
  74                 $length = create_function('$i', 'return $i * 2 + 1;');
  75                 $offset = create_function('$i', 'return $i * 2 + 2;');
  76
  77                 for ($i = 0; $i < $total; ++$i) {
  78                         $reader->seekto($originals_lo[$offset($i)]);
  79                         $original = $reader->read($originals_lo[$length($i)]);
  80                         $reader->seekto($translations_lo[$offset($i)]);
  81                         $translation = $reader->read($translations_lo[$length($i)]);
  82                         if ('' == $original) {
  83                                 $this->set_headers($this->make_headers($translation));
  84                         } else {
  85                                 $this->add_entry($this->make_entry($original, $translation));
  86                         }
  87                 }
  88                 return true;
  89         }
  90
  91         function make_headers($translation) {
  92                 $headers = array();
  93                 $lines = explode("\n", $translation);
  94                 foreach($lines as $line) {
  95                         $parts = explode(':', $line, 2);
  96                         if (!isset($parts[1])) continue;
  97                         $headers[trim($parts[0])] = trim($parts[1]);
  98                 }
  99                 return $headers;
 100         }
 101
 102         /**
 103          * @static
 104          */
 105         function &make_entry($original, $translation) {
 106                 $args = array();
 107                 // look for context
 108                 $parts = explode(chr(4), $original);
 109                 if (isset($parts[1])) {
 110                         $original = $parts[1];
 111                         $args['context'] = $parts[0];
 112                 }
 113                 // look for plural original
 114                 $parts = explode(chr(0), $original);
 115                 $args['singular'] = $parts[0];
 116                 if (isset($parts[1])) {
 117                         $args['plural'] = $parts[1];
 118                 }
 119                 // plural translations are also separated by \0
 120                 $args['translations'] = explode(chr(0), $translation);
 121                 $entry = & new Translation_Entry($args);
 122                 return $entry;
 123         }
 124
 125         function select_plural_form($count) {
 126                 return $this->gettext_select_plural_form($count);
 127         }
 128
 129         function get_plural_forms_count() {
 130                 return $this->_nplurals;
 131         }
 132
 133
 134 }
 135 ?>