wp-includes/pomo/mo.php

   1 <?php
   2 /**
   3  * Class for working with MO files
   4  *
   5  * @version $Id: mo.php 106 2009-04-23 19:48:22Z 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 Gettext_Translations {
  14
  15         var $_nplurals = 2;
  16
  17         /**
  18          * Fills up with the entries from MO file $filename
  19          *
  20          * @param string $filename MO file to load
  21          */
  22         function import_from_file($filename) {
  23                 $reader = new POMO_CachedIntFileReader($filename);
  24                 if (isset($reader->error)) {
  25                         return false;
  26                 }
  27                 return $this->import_from_reader($reader);
  28         }
  29
  30         function export_to_file($filename) {
  31                 $fh = fopen($filename, 'wb');
  32                 if ( !$fh ) return false;
  33                 $entries = array_filter($this->entries, create_function('$e', 'return !empty($e->translations);'));
  34                 ksort($entries);
  35                 $magic = 0x950412de;
  36                 $revision = 0;
  37                 $total = count($entries) + 1; // all the headers are one entry
  38                 $originals_lenghts_addr = 28;
  39                 $translations_lenghts_addr = $originals_lenghts_addr + 8 * $total;
  40                 $size_of_hash = 0;
  41                 $hash_addr = $translations_lenghts_addr + 8 * $total;
  42                 $current_addr = $hash_addr;
  43                 fwrite($fh, pack('V*', $magic, $revision, $total, $originals_lenghts_addr,
  44                         $translations_lenghts_addr, $size_of_hash, $hash_addr));
  45                 fseek($fh, $originals_lenghts_addr);
  46
  47                 // headers' msgid is an empty string
  48                 fwrite($fh, pack('VV', 0, $current_addr));
  49                 $current_addr++;
  50                 $originals_table = chr(0);
  51
  52                 foreach($entries as $entry) {
  53                         $originals_table .= $this->export_original($entry) . chr(0);
  54                         $length = strlen($this->export_original($entry));
  55                         fwrite($fh, pack('VV', $length, $current_addr));
  56                         $current_addr += $length + 1; // account for the NULL byte after
  57                 }
  58
  59                 $exported_headers = $this->export_headers();
  60                 fwrite($fh, pack('VV', strlen($exported_headers), $current_addr));
  61                 $current_addr += strlen($exported_headers) + 1;
  62                 $translations_table = $exported_headers . chr(0);
  63
  64                 foreach($entries as $entry) {
  65                         $translations_table .= $this->export_translations($entry) . chr(0);
  66                         $length = strlen($this->export_translations($entry));
  67                         fwrite($fh, pack('VV', $length, $current_addr));
  68                         $current_addr += $length + 1;
  69                 }
  70
  71                 fwrite($fh, $originals_table);
  72                 fwrite($fh, $translations_table);
  73                 fclose($fh);
  74         }
  75
  76         function export_original($entry) {
  77                 //TODO: warnings for control characters
  78                 $exported = $entry->singular;
  79                 if ($entry->is_plural) $exported .= chr(0).$entry->plural;
  80                 if (!is_null($entry->context)) $exported = $entry->context . chr(4) . $exported;
  81                 return $exported;
  82         }
  83
  84         function export_translations($entry) {
  85                 //TODO: warnings for control characters
  86                 return implode(chr(0), $entry->translations);
  87         }
  88
  89         function export_headers() {
  90                 $exported = '';
  91                 foreach($this->headers as $header => $value) {
  92                         $exported.= "$header: $value\n";
  93                 }
  94                 return $exported;
  95         }
  96
  97         function get_byteorder($magic) {
  98
  99                 // The magic is 0x950412de
 100
 101                 // bug in PHP 5.0.2, see https://savannah.nongnu.org/bugs/?func=detailitem&item_id=10565
 102                 $magic_little = (int) - 1794895138;
 103                 $magic_little_64 = (int) 2500072158;
 104                 // 0xde120495
 105                 $magic_big = ((int) - 569244523) && 0xFFFFFFFF;
 106
 107                 if ($magic_little == $magic || $magic_little_64 == $magic) {
 108                         return 'little';
 109                 } else if ($magic_big == $magic) {
 110                         return 'big';
 111                 } else {
 112                         return false;
 113                 }
 114         }
 115
 116         function import_from_reader($reader) {
 117                 $reader->setEndian('little');
 118                 $endian = MO::get_byteorder($reader->readint32());
 119                 if (false === $endian) {
 120                         return false;
 121                 }
 122                 $reader->setEndian($endian);
 123
 124                 $revision = $reader->readint32();
 125                 $total = $reader->readint32();
 126                 // get addresses of array of lenghts and offsets for original string and translations
 127                 $originals_lenghts_addr = $reader->readint32();
 128                 $translations_lenghts_addr = $reader->readint32();
 129
 130                 $reader->seekto($originals_lenghts_addr);
 131                 $originals_lenghts = $reader->readint32array($total * 2); // each of
 132                 $reader->seekto($translations_lenghts_addr);
 133                 $translations_lenghts = $reader->readint32array($total * 2);
 134
 135                 $length = create_function('$i', 'return $i * 2 + 1;');
 136                 $offset = create_function('$i', 'return $i * 2 + 2;');
 137
 138                 for ($i = 0; $i < $total; ++$i) {
 139                         $reader->seekto($originals_lenghts[$offset($i)]);
 140                         $original = $reader->read($originals_lenghts[$length($i)]);
 141                         $reader->seekto($translations_lenghts[$offset($i)]);
 142                         $translation = $reader->read($translations_lenghts[$length($i)]);
 143                         if ('' == $original) {
 144                                 $this->set_headers($this->make_headers($translation));
 145                         } else {
 146                                 $this->add_entry($this->make_entry($original, $translation));
 147                         }
 148                 }
 149                 return true;
 150         }
 151
 152         /**
 153          * @static
 154          */
 155         function &make_entry($original, $translation) {
 156                 $args = array();
 157                 // look for context
 158                 $parts = explode(chr(4), $original);
 159                 if (isset($parts[1])) {
 160                         $original = $parts[1];
 161                         $args['context'] = $parts[0];
 162                 }
 163                 // look for plural original
 164                 $parts = explode(chr(0), $original);
 165                 $args['singular'] = $parts[0];
 166                 if (isset($parts[1])) {
 167                         $args['plural'] = $parts[1];
 168                 }
 169                 // plural translations are also separated by \0
 170                 $args['translations'] = explode(chr(0), $translation);
 171                 $entry = & new Translation_Entry($args);
 172                 return $entry;
 173         }
 174
 175         function select_plural_form($count) {
 176                 return $this->gettext_select_plural_form($count);
 177         }
 178
 179         function get_plural_forms_count() {
 180                 return $this->_nplurals;
 181         }
 182
 183
 184 }
 185 ?>