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<?php
/**
* Class for working with MO files
*
* @version $Id: mo.php 718 2012-10-31 00:32:02Z nbachiyski $
* @package pomo
* @subpackage mo
*/
require_once dirname(__FILE__) . '/translations.php';
require_once dirname(__FILE__) . '/streams.php';
if ( !class_exists( 'MO' ) ):
class MO extends Gettext_Translations {
var $_nplurals = 2;
/**
* Fills up with the entries from MO file $filename
*
* @param string $filename MO file to load
*/
function import_from_file($filename) {
$reader = new POMO_FileReader($filename);
if (!$reader->is_resource())
return false;
return $this->import_from_reader($reader);
}
function export_to_file($filename) {
$fh = fopen($filename, 'wb');
if ( !$fh ) return false;
$res = $this->export_to_file_handle( $fh );
fclose($fh);
return $res;
}
function export() {
$tmp_fh = fopen("php://temp", 'r+');
if ( !$tmp_fh ) return false;
$this->export_to_file_handle( $tmp_fh );
rewind( $tmp_fh );
return stream_get_contents( $tmp_fh );
}
function is_entry_good_for_export( $entry ) {
if ( empty( $entry->translations ) ) {
return false;
}
if ( !array_filter( $entry->translations ) ) {
return false;
}
return true;
}
function export_to_file_handle($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, $translations_table);
return true;
}
function export_original($entry) {
//TODO: warnings for control characters
$exported = $entry->singular;
if ($entry->is_plural) $exported .= chr(0).$entry->plural;
if (!is_null($entry->context)) $exported = $entry->context . chr(4) . $exported;
return $exported;
}
function export_translations($entry) {
//TODO: warnings for control characters
return implode(chr(0), $entry->translations);
}
function export_headers() {
$exported = '';
foreach($this->headers as $header => $value) {
$exported.= "$header: $value\n";
}
return $exported;
}
function get_byteorder($magic) {
// The magic is 0x950412de
// bug in PHP 5.0.2, see https://savannah.nongnu.org/bugs/?func=detailitem&item_id=10565
$magic_little = (int) - 1794895138;
$magic_little_64 = (int) 2500072158;
// 0xde120495
$magic_big = ((int) - 569244523) & 0xFFFFFFFF;
if ($magic_little == $magic || $magic_little_64 == $magic) {
return 'little';
} else if ($magic_big == $magic) {
return 'big';
} else {
return false;
}
}
/**
* @param POMO_FileReader $reader
*/
function import_from_reader($reader) {
$endian_string = MO::get_byteorder($reader->readint32());
if (false === $endian_string) {
return false;
}
$reader->setEndian($endian_string);
$endian = ('big' == $endian_string)? 'N' : 'V';
$header = $reader->read(24);
if ($reader->strlen($header) != 24)
return false;
// parse header
$header = unpack("{$endian}revision/{$endian}total/{$endian}originals_lenghts_addr/{$endian}translations_lenghts_addr/{$endian}hash_length/{$endian}hash_addr", $header);
if (!is_array($header))
return false;
// support revision 0 of MO format specs, only
if ( $header['revision'] != 0 ) {
return false;
}
// seek to data blocks
$reader->seekto( $header['originals_lenghts_addr'] );
// read originals' indices
$originals_lengths_length = $header['translations_lenghts_addr'] - $header['originals_lenghts_addr'];
if ( $originals_lengths_length != $header['total'] * 8 ) {
return false;
}
$originals = $reader->read($originals_lengths_length);
if ( $reader->strlen( $originals ) != $originals_lengths_length ) {
return false;
}
// read translations' indices
$translations_lenghts_length = $header['hash_addr'] - $header['translations_lenghts_addr'];
if ( $translations_lenghts_length != $header['total'] * 8 ) {
return false;
}
$translations = $reader->read($translations_lenghts_length);
if ( $reader->strlen( $translations ) != $translations_lenghts_length ) {
return false;
}
// transform raw data into set of indices
$originals = $reader->str_split( $originals, 8 );
$translations = $reader->str_split( $translations, 8 );
// skip hash table
$strings_addr = $header['hash_addr'] + $header['hash_length'] * 4;
$reader->seekto($strings_addr);
$strings = $reader->read_all();
$reader->close();
for ( $i = 0; $i < $header['total']; $i++ ) {
$o = unpack( "{$endian}length/{$endian}pos", $originals[$i] );
$t = unpack( "{$endian}length/{$endian}pos", $translations[$i] );
if ( !$o || !$t ) return false;
// adjust offset due to reading strings to separate space before
$o['pos'] -= $strings_addr;
$t['pos'] -= $strings_addr;
$original = $reader->substr( $strings, $o['pos'], $o['length'] );
$translation = $reader->substr( $strings, $t['pos'], $t['length'] );
if ('' === $original) {
$this->set_headers($this->make_headers($translation));
} else {
$entry = &$this->make_entry($original, $translation);
$this->entries[$entry->key()] = &$entry;
}
}
return true;
}
/**
* Build a Translation_Entry from original string and translation strings,
* found in a MO file
*
* @static
* @param string $original original string to translate from MO file. Might contain
* 0x04 as context separator or 0x00 as singular/plural separator
* @param string $translation translation string from MO file. Might contain
* 0x00 as a plural translations separator
*/
function &make_entry($original, $translation) {
$entry = new Translation_Entry();
// look for context
$parts = explode(chr(4), $original);
if (isset($parts[1])) {
$original = $parts[1];
$entry->context = $parts[0];
}
// look for plural original
$parts = explode(chr(0), $original);
$entry->singular = $parts[0];
if (isset($parts[1])) {
$entry->is_plural = true;
$entry->plural = $parts[1];
}
// plural translations are also separated by \0
$entry->translations = explode(chr(0), $translation);
return $entry;
}
function select_plural_form($count) {
return $this->gettext_select_plural_form($count);
}
function get_plural_forms_count() {
return $this->_nplurals;
}
}
endif;
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