Wordpress 2.8.2
[autoinstalls/wordpress.git] / 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 ?>