302 lines
8.0 KiB
PHP
302 lines
8.0 KiB
PHP
<?php
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/**
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* Class for working with MO files
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*
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* @version $Id: mo.php 1157 2015-11-20 04:30:11Z dd32 $
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* @package pomo
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* @subpackage mo
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*/
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require_once dirname(__FILE__) . '/translations.php';
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require_once dirname(__FILE__) . '/streams.php';
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if ( ! class_exists( 'MO', false ) ):
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class MO extends Gettext_Translations {
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var $_nplurals = 2;
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/**
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* Fills up with the entries from MO file $filename
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*
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* @param string $filename MO file to load
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*/
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function import_from_file($filename) {
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$reader = new POMO_FileReader($filename);
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if (!$reader->is_resource())
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return false;
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return $this->import_from_reader($reader);
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}
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/**
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* @param string $filename
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* @return bool
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*/
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function export_to_file($filename) {
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$fh = fopen($filename, 'wb');
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if ( !$fh ) return false;
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$res = $this->export_to_file_handle( $fh );
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fclose($fh);
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return $res;
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}
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/**
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* @return string|false
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*/
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function export() {
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$tmp_fh = fopen("php://temp", 'r+');
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if ( !$tmp_fh ) return false;
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$this->export_to_file_handle( $tmp_fh );
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rewind( $tmp_fh );
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return stream_get_contents( $tmp_fh );
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}
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/**
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* @param Translation_Entry $entry
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* @return bool
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*/
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function is_entry_good_for_export( $entry ) {
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if ( empty( $entry->translations ) ) {
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return false;
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}
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if ( !array_filter( $entry->translations ) ) {
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return false;
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}
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return true;
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}
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/**
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* @param resource $fh
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* @return true
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*/
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function export_to_file_handle($fh) {
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$entries = array_filter( $this->entries, array( $this, 'is_entry_good_for_export' ) );
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ksort($entries);
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$magic = 0x950412de;
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$revision = 0;
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$total = count($entries) + 1; // all the headers are one entry
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$originals_lenghts_addr = 28;
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$translations_lenghts_addr = $originals_lenghts_addr + 8 * $total;
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$size_of_hash = 0;
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$hash_addr = $translations_lenghts_addr + 8 * $total;
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$current_addr = $hash_addr;
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fwrite($fh, pack('V*', $magic, $revision, $total, $originals_lenghts_addr,
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$translations_lenghts_addr, $size_of_hash, $hash_addr));
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fseek($fh, $originals_lenghts_addr);
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// headers' msgid is an empty string
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fwrite($fh, pack('VV', 0, $current_addr));
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$current_addr++;
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$originals_table = chr(0);
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$reader = new POMO_Reader();
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foreach($entries as $entry) {
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$originals_table .= $this->export_original($entry) . chr(0);
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$length = $reader->strlen($this->export_original($entry));
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fwrite($fh, pack('VV', $length, $current_addr));
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$current_addr += $length + 1; // account for the NULL byte after
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}
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$exported_headers = $this->export_headers();
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fwrite($fh, pack('VV', $reader->strlen($exported_headers), $current_addr));
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$current_addr += strlen($exported_headers) + 1;
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$translations_table = $exported_headers . chr(0);
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foreach($entries as $entry) {
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$translations_table .= $this->export_translations($entry) . chr(0);
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$length = $reader->strlen($this->export_translations($entry));
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fwrite($fh, pack('VV', $length, $current_addr));
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$current_addr += $length + 1;
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}
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fwrite($fh, $originals_table);
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fwrite($fh, $translations_table);
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return true;
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}
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/**
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* @param Translation_Entry $entry
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* @return string
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*/
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function export_original($entry) {
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//TODO: warnings for control characters
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$exported = $entry->singular;
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if ($entry->is_plural) $exported .= chr(0).$entry->plural;
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if ($entry->context) $exported = $entry->context . chr(4) . $exported;
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return $exported;
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}
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/**
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* @param Translation_Entry $entry
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* @return string
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*/
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function export_translations($entry) {
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//TODO: warnings for control characters
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return $entry->is_plural ? implode(chr(0), $entry->translations) : $entry->translations[0];
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}
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/**
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* @return string
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*/
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function export_headers() {
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$exported = '';
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foreach($this->headers as $header => $value) {
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$exported.= "$header: $value\n";
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}
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return $exported;
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}
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/**
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* @param int $magic
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* @return string|false
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*/
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function get_byteorder($magic) {
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// The magic is 0x950412de
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// bug in PHP 5.0.2, see https://savannah.nongnu.org/bugs/?func=detailitem&item_id=10565
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$magic_little = (int) - 1794895138;
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$magic_little_64 = (int) 2500072158;
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// 0xde120495
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$magic_big = ((int) - 569244523) & 0xFFFFFFFF;
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if ($magic_little == $magic || $magic_little_64 == $magic) {
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return 'little';
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} else if ($magic_big == $magic) {
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return 'big';
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} else {
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return false;
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}
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}
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/**
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* @param POMO_FileReader $reader
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*/
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function import_from_reader($reader) {
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$endian_string = MO::get_byteorder($reader->readint32());
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if (false === $endian_string) {
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return false;
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}
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$reader->setEndian($endian_string);
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$endian = ('big' == $endian_string)? 'N' : 'V';
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$header = $reader->read(24);
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if ($reader->strlen($header) != 24)
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return false;
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// parse header
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$header = unpack("{$endian}revision/{$endian}total/{$endian}originals_lenghts_addr/{$endian}translations_lenghts_addr/{$endian}hash_length/{$endian}hash_addr", $header);
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if (!is_array($header))
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return false;
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// support revision 0 of MO format specs, only
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if ( $header['revision'] != 0 ) {
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return false;
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}
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// seek to data blocks
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$reader->seekto( $header['originals_lenghts_addr'] );
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// read originals' indices
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$originals_lengths_length = $header['translations_lenghts_addr'] - $header['originals_lenghts_addr'];
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if ( $originals_lengths_length != $header['total'] * 8 ) {
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return false;
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}
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$originals = $reader->read($originals_lengths_length);
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if ( $reader->strlen( $originals ) != $originals_lengths_length ) {
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return false;
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}
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// read translations' indices
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$translations_lenghts_length = $header['hash_addr'] - $header['translations_lenghts_addr'];
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if ( $translations_lenghts_length != $header['total'] * 8 ) {
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return false;
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}
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$translations = $reader->read($translations_lenghts_length);
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if ( $reader->strlen( $translations ) != $translations_lenghts_length ) {
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return false;
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}
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// transform raw data into set of indices
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$originals = $reader->str_split( $originals, 8 );
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$translations = $reader->str_split( $translations, 8 );
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// skip hash table
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$strings_addr = $header['hash_addr'] + $header['hash_length'] * 4;
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$reader->seekto($strings_addr);
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$strings = $reader->read_all();
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$reader->close();
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for ( $i = 0; $i < $header['total']; $i++ ) {
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$o = unpack( "{$endian}length/{$endian}pos", $originals[$i] );
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$t = unpack( "{$endian}length/{$endian}pos", $translations[$i] );
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if ( !$o || !$t ) return false;
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// adjust offset due to reading strings to separate space before
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$o['pos'] -= $strings_addr;
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$t['pos'] -= $strings_addr;
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$original = $reader->substr( $strings, $o['pos'], $o['length'] );
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$translation = $reader->substr( $strings, $t['pos'], $t['length'] );
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if ('' === $original) {
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$this->set_headers($this->make_headers($translation));
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} else {
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$entry = &$this->make_entry($original, $translation);
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$this->entries[$entry->key()] = &$entry;
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}
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}
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return true;
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}
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/**
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* Build a Translation_Entry from original string and translation strings,
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* found in a MO file
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*
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* @static
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* @param string $original original string to translate from MO file. Might contain
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* 0x04 as context separator or 0x00 as singular/plural separator
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* @param string $translation translation string from MO file. Might contain
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* 0x00 as a plural translations separator
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*/
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function &make_entry($original, $translation) {
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$entry = new Translation_Entry();
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// look for context
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$parts = explode(chr(4), $original);
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if (isset($parts[1])) {
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$original = $parts[1];
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$entry->context = $parts[0];
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}
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// look for plural original
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$parts = explode(chr(0), $original);
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$entry->singular = $parts[0];
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if (isset($parts[1])) {
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$entry->is_plural = true;
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$entry->plural = $parts[1];
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}
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// plural translations are also separated by \0
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$entry->translations = explode(chr(0), $translation);
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return $entry;
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}
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/**
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* @param int $count
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* @return string
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*/
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function select_plural_form($count) {
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return $this->gettext_select_plural_form($count);
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}
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/**
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* @return int
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*/
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function get_plural_forms_count() {
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return $this->_nplurals;
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}
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}
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endif; |