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Chris Sewell
354
lib/symfony/i18n/Gettext/MO.php
Executable file
354
lib/symfony/i18n/Gettext/MO.php
Executable file
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<?php
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/**
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* TGettext_MO class file.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the BSD License.
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*
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* Copyright(c) 2004 by Qiang Xue. All rights reserved.
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*
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* To contact the author write to {@link mailto:qiang.xue@gmail.com Qiang Xue}
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* The latest version of PRADO can be obtained from:
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* {@link http://prado.sourceforge.net/}
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*
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* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
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* @version $Revision: 1415 $ $Date: 2006-06-11 10:33:51 +0200 (Sun, 11 Jun 2006) $
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* @package System.I18N.core
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*/
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// +----------------------------------------------------------------------+
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// | PEAR :: File :: Gettext :: MO |
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// +----------------------------------------------------------------------+
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// | This source file is subject to version 3.0 of the PHP license, |
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// | that is available at http://www.php.net/license/3_0.txt |
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// | If you did not receive a copy of the PHP license and are unable |
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// | to obtain it through the world-wide-web, please send a note to |
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// | license@php.net so we can mail you a copy immediately. |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 2004 Michael Wallner <mike@iworks.at> |
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// +----------------------------------------------------------------------+
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//
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// $Id: MO.php 1415 2006-06-11 08:33:51Z fabien $
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/**
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* File::Gettext::MO
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*
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* @author Michael Wallner <mike@php.net>
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* @license PHP License
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*/
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require_once dirname(__FILE__).'/TGettext.class.php';
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/**
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* File_Gettext_MO
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*
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* GNU MO file reader and writer.
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*
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* @author Michael Wallner <mike@php.net>
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* @version $Revision: 1415 $
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* @access public
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* @package System.I18N.core
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*/
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class TGettext_MO extends TGettext
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{
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/**
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* file handle
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*
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* @access private
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* @var resource
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*/
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protected $_handle = null;
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/**
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* big endianess
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*
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* Whether to write with big endian byte order.
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*
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* @access public
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* @var bool
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*/
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protected $writeBigEndian = false;
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/**
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* Constructor
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*
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* @access public
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* @return object File_Gettext_MO
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* @param string $file path to GNU MO file
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*/
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function TGettext_MO($file = '')
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{
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$this->file = $file;
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}
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/**
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* _read
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*
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* @access private
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* @return mixed
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* @param int $bytes
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*/
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function _read($bytes = 1)
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{
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if (0 < $bytes = abs($bytes)) {
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return fread($this->_handle, $bytes);
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}
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return null;
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}
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/**
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* _readInt
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*
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* @access private
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* @return int
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* @param bool $bigendian
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*/
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function _readInt($bigendian = false)
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{
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//unpack returns a reference????
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$unpacked = unpack($bigendian ? 'N' : 'V', $this->_read(4));
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return array_shift($unpacked);
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}
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/**
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* _writeInt
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*
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* @access private
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* @return int
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* @param int $int
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*/
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function _writeInt($int)
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{
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return $this->_write(pack($this->writeBigEndian ? 'N' : 'V', (int) $int));
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}
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/**
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* _write
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*
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* @access private
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* @return int
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* @param string $data
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*/
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function _write($data)
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{
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return fwrite($this->_handle, $data);
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}
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/**
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* _writeStr
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*
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* @access private
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* @return int
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* @param string $string
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*/
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function _writeStr($string)
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{
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return $this->_write($string . "\0");
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}
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/**
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* _readStr
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*
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* @access private
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* @return string
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* @param array $params associative array with offset and length
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* of the string
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*/
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function _readStr($params)
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{
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fseek($this->_handle, $params['offset']);
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return $this->_read($params['length']);
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}
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/**
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* Load MO file
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*
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* @access public
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* @return mixed Returns true on success or PEAR_Error on failure.
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* @param string $file
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*/
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function load($file = null)
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{
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if (!isset($file)) {
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$file = $this->file;
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}
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// open MO file
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if (!is_resource($this->_handle = @fopen($file, 'rb'))) {
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return false;
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}
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// lock MO file shared
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if (!@flock($this->_handle, LOCK_SH)) {
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@fclose($this->_handle);
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return false;
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}
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// read (part of) magic number from MO file header and define endianess
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//unpack returns a reference????
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$unpacked = unpack('c', $this->_read(4));
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switch ($magic = array_shift($unpacked))
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{
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case -34:
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$be = false;
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break;
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case -107:
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$be = true;
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break;
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default:
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return false;
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}
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// check file format revision - we currently only support 0
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if (0 !== ($_rev = $this->_readInt($be))) {
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return false;
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}
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// count of strings in this file
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$count = $this->_readInt($be);
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// offset of hashing table of the msgids
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$offset_original = $this->_readInt($be);
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// offset of hashing table of the msgstrs
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$offset_translat = $this->_readInt($be);
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// move to msgid hash table
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fseek($this->_handle, $offset_original);
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// read lengths and offsets of msgids
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$original = array();
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for ($i = 0; $i < $count; $i++) {
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$original[$i] = array(
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'length' => $this->_readInt($be),
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'offset' => $this->_readInt($be)
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);
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}
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// move to msgstr hash table
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fseek($this->_handle, $offset_translat);
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// read lengths and offsets of msgstrs
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$translat = array();
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for ($i = 0; $i < $count; $i++) {
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$translat[$i] = array(
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'length' => $this->_readInt($be),
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'offset' => $this->_readInt($be)
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);
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}
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// read all
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for ($i = 0; $i < $count; $i++) {
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$this->strings[$this->_readStr($original[$i])] =
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$this->_readStr($translat[$i]);
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}
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// done
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@flock($this->_handle, LOCK_UN);
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@fclose($this->_handle);
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$this->_handle = null;
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// check for meta info
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if (isset($this->strings[''])) {
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$this->meta = parent::meta2array($this->strings['']);
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unset($this->strings['']);
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}
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return true;
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}
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/**
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* Save MO file
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*
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* @access public
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* @return mixed Returns true on success or PEAR_Error on failure.
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* @param string $file
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*/
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function save($file = null)
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{
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if (!isset($file)) {
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$file = $this->file;
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}
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// open MO file
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if (!is_resource($this->_handle = @fopen($file, 'wb'))) {
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return false;
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}
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// lock MO file exclusively
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if (!@flock($this->_handle, LOCK_EX)) {
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@fclose($this->_handle);
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return false;
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}
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// write magic number
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if ($this->writeBigEndian) {
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$this->_write(pack('c*', 0x95, 0x04, 0x12, 0xde));
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} else {
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$this->_write(pack('c*', 0xde, 0x12, 0x04, 0x95));
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}
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// write file format revision
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$this->_writeInt(0);
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$count = count($this->strings) + ($meta = (count($this->meta) ? 1 : 0));
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// write count of strings
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$this->_writeInt($count);
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$offset = 28;
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// write offset of orig. strings hash table
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$this->_writeInt($offset);
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$offset += ($count * 8);
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// write offset transl. strings hash table
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$this->_writeInt($offset);
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// write size of hash table (we currently ommit the hash table)
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$this->_writeInt(0);
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$offset += ($count * 8);
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// write offset of hash table
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$this->_writeInt($offset);
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// unshift meta info
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if ($meta) {
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$meta = '';
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foreach ($this->meta as $key => $val) {
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$meta .= $key . ': ' . $val . "\n";
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}
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$strings = array('' => $meta) + $this->strings;
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} else {
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$strings = $this->strings;
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}
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// write offsets for original strings
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foreach (array_keys($strings) as $o) {
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$len = strlen($o);
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$this->_writeInt($len);
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$this->_writeInt($offset);
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$offset += $len + 1;
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}
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// write offsets for translated strings
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foreach ($strings as $t) {
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$len = strlen($t);
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$this->_writeInt($len);
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$this->_writeInt($offset);
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$offset += $len + 1;
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}
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// write original strings
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foreach (array_keys($strings) as $o) {
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$this->_writeStr($o);
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}
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// write translated strings
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foreach ($strings as $t) {
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$this->_writeStr($t);
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}
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// done
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@flock($this->_handle, LOCK_UN);
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@fclose($this->_handle);
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return true;
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}
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}
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