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<?php /** * This file is part of the POMO package. * * @copyright 2014 POMO * @license GPL / namespace POMO; use POMO\Streams\FileReader; use POMO\Streams\NOOPReader; use POMO\Translations\EntryTranslations; use POMO\Translations\GettextTranslations; /* * Class for working with MO files. / class MO extends GettextTranslations { /* * Number of plural forms. * * @var int / public $_nplurals = 2; /* * Loaded MO file. * * @var string / private $filename = ''; /* * Returns the loaded MO file. * * @return string The loaded MO file. / public function get_filename() { return $this->filename; } /* * Fills up with the entries from MO file $filename * * @param string $filename MO file to load * @return bool True if the import from file was successful, otherwise false. / public function import_from_file($filename) { $reader = new FileReader($filename); if (! $reader->is_resource()) { return false; } $this->filename = (string) $filename; return $this->import_from_reader($reader); } /* * @param string $filename * @return bool / public function export_to_file($filename) { $fh = fopen($filename, 'wb'); if (! $fh) { return false; } $res = $this->export_to_file_handle($fh); fclose($fh); return $res; } /* * @return string\|false / public 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); } /* * @param EntryTranslations $entry * * @return bool / public function is_entry_good_for_export(EntryTranslations $entry) { if (empty($entry->translations)) { return false; } if (! array_filter($entry->translations)) { return false; } return true; } /* * @param resource $fh * @return true / public function export_to_file_handle($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_lengths_addr = 28; $translations_lengths_addr = $originals_lengths_addr + 8 $total; $size_of_hash = 0; $hash_addr = $translations_lengths_addr + 8 * $total; $current_addr = $hash_addr; fwrite( $fh, pack( 'V', $magic, $revision, $total, $originals_lengths_addr, $translations_lengths_addr, $size_of_hash, $hash_addr ) ); fseek($fh, $originals_lengths_addr); // Headers' msgid is an empty string. fwrite($fh, pack('VV', 0, $current_addr)); $current_addr++; $originals_table = "\0"; $reader = new NOOPReader(); foreach ($entries as $entry) { $originals_table .= $this->export_original($entry) . "\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 = $exported_headers . "\0"; foreach ($entries as $entry) { $translations_table .= $this->export_translations($entry) . "\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; } /* * @param EntryTranslations $entry * * @return string / public function export_original(EntryTranslations $entry) { // TODO: Warnings for control characters. $exported = $entry->singular; if ($entry->is_plural) { $exported .= "\0" . $entry->plural; } if ($entry->context) { $exported = $entry->context . "\4" . $exported; } return $exported; } /* * @param EntryTranslations $entry * * @return string / public function export_translations(EntryTranslations $entry) { // TODO: Warnings for control characters. return $entry->is_plural ? implode("\0", $entry->translations) : $entry->translations[0]; } /* * @return string / public function export_headers() { $exported = ''; foreach ($this->headers as $header => $value) { $exported .= "$header: $value\n"; } return $exported; } /* * @param int $magic * @return string\|false / public function get_byteorder($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 == $magic) { return 'little'; } elseif ($magic_big == $magic) { return 'big'; } else { return false; } } /* * @param FileReader $reader * @return bool True if the import was successful, otherwise false. / public function import_from_reader(FileReader $reader) { $endian_string = $this->get_byteorder($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_lengths_addr/{$endian}translations_lengths_addr/{$endian}hash_length/{$endian}hash_addr", $header); if (! is_array($header)) { return false; } // Support revision 0 of MO format specs, only. if (0 != $header['revision']) { return false; } // Seek to data blocks. $reader->seekto($header['originals_lengths_addr']); // Read originals' indices. $originals_lengths_length = $header['translations_lengths_addr'] - $header['originals_lengths_addr']; if ($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_lengths_length = $header['hash_addr'] - $header['translations_lengths_addr']; if ($translations_lengths_length != $header['total'] * 8) { return false; } $translations = $reader->read($translations_lengths_length); if ($reader->strlen($translations) != $translations_lengths_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 { $entry = &static::make_entry($original, $translation); $this->entries[ $entry->key() ] = &$entry; } } return true; } /** * Build a EntryTranslations 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 $translation translation string from MO file. Might contain * 0x00 as a plural translations separator * @return EntryTranslations Entry instance. / public static function &make_entry($original, $translation) { $entry = new EntryTranslations(); // Look for context, separated by \4. $parts = explode("\4", $original); if (isset($parts[1])) { $original = $parts[1]; $entry->context = $parts[0]; } // Look for plural original. $parts = explode("\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("\0", $translation); return $entry; } /* * @param int $count * @return string / public function select_plural_form($count) { return $this->gettext_select_plural_form($count); } /* * @return int */ public function get_plural_forms_count() { return $this->_nplurals; } }

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