mirror of
https://github.com/WordPress/WordPress.git
synced 2024-11-05 02:10:45 +01:00
4374db281e
git-svn-id: http://svn.automattic.com/wordpress/trunk@6554 1a063a9b-81f0-0310-95a4-ce76da25c4cd
400 lines
11 KiB
PHP
400 lines
11 KiB
PHP
<?php
|
|
/**
|
|
* PHP-Gettext External Library: gettext_reader class
|
|
*
|
|
* @package External
|
|
* @subpackage PHP-gettext
|
|
*
|
|
* @internal
|
|
Copyright (c) 2003 Danilo Segan <danilo@kvota.net>.
|
|
Copyright (c) 2005 Nico Kaiser <nico@siriux.net>
|
|
|
|
This file is part of PHP-gettext.
|
|
|
|
PHP-gettext is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
PHP-gettext is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with PHP-gettext; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
*/
|
|
|
|
/**
|
|
* Provides a simple gettext replacement that works independently from
|
|
* the system's gettext abilities.
|
|
* It can read MO files and use them for translating strings.
|
|
* The files are passed to gettext_reader as a Stream (see streams.php)
|
|
*
|
|
* This version has the ability to cache all strings and translations to
|
|
* speed up the string lookup.
|
|
* While the cache is enabled by default, it can be switched off with the
|
|
* second parameter in the constructor (e.g. whenusing very large MO files
|
|
* that you don't want to keep in memory)
|
|
*/
|
|
class gettext_reader {
|
|
//public:
|
|
var $error = 0; // public variable that holds error code (0 if no error)
|
|
|
|
//private:
|
|
var $BYTEORDER = 0; // 0: low endian, 1: big endian
|
|
var $STREAM = NULL;
|
|
var $short_circuit = false;
|
|
var $enable_cache = false;
|
|
var $originals = NULL; // offset of original table
|
|
var $translations = NULL; // offset of translation table
|
|
var $pluralheader = NULL; // cache header field for plural forms
|
|
var $select_string_function = NULL; // cache function, which chooses plural forms
|
|
var $total = 0; // total string count
|
|
var $table_originals = NULL; // table for original strings (offsets)
|
|
var $table_translations = NULL; // table for translated strings (offsets)
|
|
var $cache_translations = NULL; // original -> translation mapping
|
|
|
|
|
|
/* Methods */
|
|
|
|
|
|
/**
|
|
* Reads a 32bit Integer from the Stream
|
|
*
|
|
* @access private
|
|
* @return Integer from the Stream
|
|
*/
|
|
function readint() {
|
|
if ($this->BYTEORDER == 0) {
|
|
// low endian
|
|
$low_end = unpack('V', $this->STREAM->read(4));
|
|
return array_shift($low_end);
|
|
} else {
|
|
// big endian
|
|
$big_end = unpack('N', $this->STREAM->read(4));
|
|
return array_shift($big_end);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Reads an array of Integers from the Stream
|
|
*
|
|
* @param int count How many elements should be read
|
|
* @return Array of Integers
|
|
*/
|
|
function readintarray($count) {
|
|
if ($this->BYTEORDER == 0) {
|
|
// low endian
|
|
return unpack('V'.$count, $this->STREAM->read(4 * $count));
|
|
} else {
|
|
// big endian
|
|
return unpack('N'.$count, $this->STREAM->read(4 * $count));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Constructor
|
|
*
|
|
* @param object Reader the StreamReader object
|
|
* @param boolean enable_cache Enable or disable caching of strings (default on)
|
|
*/
|
|
function gettext_reader($Reader, $enable_cache = true) {
|
|
// If there isn't a StreamReader, turn on short circuit mode.
|
|
if (! $Reader || isset($Reader->error) ) {
|
|
$this->short_circuit = true;
|
|
return;
|
|
}
|
|
|
|
// Caching can be turned off
|
|
$this->enable_cache = $enable_cache;
|
|
|
|
// $MAGIC1 = (int)0x950412de; //bug in PHP 5.0.2, see https://savannah.nongnu.org/bugs/?func=detailitem&item_id=10565
|
|
$MAGIC1 = (int) - 1794895138;
|
|
// $MAGIC2 = (int)0xde120495; //bug
|
|
$MAGIC2 = (int) - 569244523;
|
|
// 64-bit fix
|
|
$MAGIC3 = (int) 2500072158;
|
|
|
|
$this->STREAM = $Reader;
|
|
$magic = $this->readint();
|
|
if ($magic == $MAGIC1 || $magic == $MAGIC3) { // to make sure it works for 64-bit platforms
|
|
$this->BYTEORDER = 0;
|
|
} elseif ($magic == ($MAGIC2 & 0xFFFFFFFF)) {
|
|
$this->BYTEORDER = 1;
|
|
} else {
|
|
$this->error = 1; // not MO file
|
|
return false;
|
|
}
|
|
|
|
// FIXME: Do we care about revision? We should.
|
|
$revision = $this->readint();
|
|
|
|
$this->total = $this->readint();
|
|
$this->originals = $this->readint();
|
|
$this->translations = $this->readint();
|
|
}
|
|
|
|
/**
|
|
* Loads the translation tables from the MO file into the cache
|
|
* If caching is enabled, also loads all strings into a cache
|
|
* to speed up translation lookups
|
|
*
|
|
* @access private
|
|
*/
|
|
function load_tables() {
|
|
if (is_array($this->cache_translations) &&
|
|
is_array($this->table_originals) &&
|
|
is_array($this->table_translations))
|
|
return;
|
|
|
|
/* get original and translations tables */
|
|
$this->STREAM->seekto($this->originals);
|
|
$this->table_originals = $this->readintarray($this->total * 2);
|
|
$this->STREAM->seekto($this->translations);
|
|
$this->table_translations = $this->readintarray($this->total * 2);
|
|
|
|
if ($this->enable_cache) {
|
|
$this->cache_translations = array ();
|
|
/* read all strings in the cache */
|
|
for ($i = 0; $i < $this->total; $i++) {
|
|
$this->STREAM->seekto($this->table_originals[$i * 2 + 2]);
|
|
$original = $this->STREAM->read($this->table_originals[$i * 2 + 1]);
|
|
$this->STREAM->seekto($this->table_translations[$i * 2 + 2]);
|
|
$translation = $this->STREAM->read($this->table_translations[$i * 2 + 1]);
|
|
$this->cache_translations[$original] = $translation;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns a string from the "originals" table
|
|
*
|
|
* @access private
|
|
* @param int num Offset number of original string
|
|
* @return string Requested string if found, otherwise ''
|
|
*/
|
|
function get_original_string($num) {
|
|
$length = $this->table_originals[$num * 2 + 1];
|
|
$offset = $this->table_originals[$num * 2 + 2];
|
|
if (! $length)
|
|
return '';
|
|
$this->STREAM->seekto($offset);
|
|
$data = $this->STREAM->read($length);
|
|
return (string)$data;
|
|
}
|
|
|
|
/**
|
|
* Returns a string from the "translations" table
|
|
*
|
|
* @access private
|
|
* @param int num Offset number of original string
|
|
* @return string Requested string if found, otherwise ''
|
|
*/
|
|
function get_translation_string($num) {
|
|
$length = $this->table_translations[$num * 2 + 1];
|
|
$offset = $this->table_translations[$num * 2 + 2];
|
|
if (! $length)
|
|
return '';
|
|
$this->STREAM->seekto($offset);
|
|
$data = $this->STREAM->read($length);
|
|
return (string)$data;
|
|
}
|
|
|
|
/**
|
|
* Binary search for string
|
|
*
|
|
* @access private
|
|
* @param string string
|
|
* @param int start (internally used in recursive function)
|
|
* @param int end (internally used in recursive function)
|
|
* @return int string number (offset in originals table)
|
|
*/
|
|
function find_string($string, $start = -1, $end = -1) {
|
|
if (($start == -1) or ($end == -1)) {
|
|
// find_string is called with only one parameter, set start end end
|
|
$start = 0;
|
|
$end = $this->total;
|
|
}
|
|
if (abs($start - $end) <= 1) {
|
|
// We're done, now we either found the string, or it doesn't exist
|
|
$txt = $this->get_original_string($start);
|
|
if ($string == $txt)
|
|
return $start;
|
|
else
|
|
return -1;
|
|
} else if ($start > $end) {
|
|
// start > end -> turn around and start over
|
|
return $this->find_string($string, $end, $start);
|
|
} else {
|
|
// Divide table in two parts
|
|
$half = (int)(($start + $end) / 2);
|
|
$cmp = strcmp($string, $this->get_original_string($half));
|
|
if ($cmp == 0)
|
|
// string is exactly in the middle => return it
|
|
return $half;
|
|
else if ($cmp < 0)
|
|
// The string is in the upper half
|
|
return $this->find_string($string, $start, $half);
|
|
else
|
|
// The string is in the lower half
|
|
return $this->find_string($string, $half, $end);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Translates a string
|
|
*
|
|
* @access public
|
|
* @param string string to be translated
|
|
* @return string translated string (or original, if not found)
|
|
*/
|
|
function translate($string) {
|
|
if ($this->short_circuit)
|
|
return $string;
|
|
$this->load_tables();
|
|
|
|
if ($this->enable_cache) {
|
|
// Caching enabled, get translated string from cache
|
|
if (array_key_exists($string, $this->cache_translations))
|
|
return $this->cache_translations[$string];
|
|
else
|
|
return $string;
|
|
} else {
|
|
// Caching not enabled, try to find string
|
|
$num = $this->find_string($string);
|
|
if ($num == -1)
|
|
return $string;
|
|
else
|
|
return $this->get_translation_string($num);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get possible plural forms from MO header
|
|
*
|
|
* @access private
|
|
* @return string plural form header
|
|
*/
|
|
function get_plural_forms() {
|
|
// lets assume message number 0 is header
|
|
// this is true, right?
|
|
$this->load_tables();
|
|
|
|
// cache header field for plural forms
|
|
if (! is_string($this->pluralheader)) {
|
|
if ($this->enable_cache) {
|
|
$header = $this->cache_translations[""];
|
|
} else {
|
|
$header = $this->get_translation_string(0);
|
|
}
|
|
$header .= "\n"; //make sure our regex matches
|
|
if (eregi("plural-forms: ([^\n]*)\n", $header, $regs))
|
|
$expr = $regs[1];
|
|
else
|
|
$expr = "nplurals=2; plural=n == 1 ? 0 : 1;";
|
|
|
|
// add parentheses
|
|
// important since PHP's ternary evaluates from left to right
|
|
$expr.= ';';
|
|
$res= '';
|
|
$p= 0;
|
|
for ($i= 0; $i < strlen($expr); $i++) {
|
|
$ch= $expr[$i];
|
|
switch ($ch) {
|
|
case '?':
|
|
$res.= ' ? (';
|
|
$p++;
|
|
break;
|
|
case ':':
|
|
$res.= ') : (';
|
|
break;
|
|
case ';':
|
|
$res.= str_repeat( ')', $p) . ';';
|
|
$p= 0;
|
|
break;
|
|
default:
|
|
$res.= $ch;
|
|
}
|
|
}
|
|
$this->pluralheader = $res;
|
|
}
|
|
|
|
return $this->pluralheader;
|
|
}
|
|
|
|
/**
|
|
* Detects which plural form to take
|
|
*
|
|
* @access private
|
|
* @param n count
|
|
* @return int array index of the right plural form
|
|
*/
|
|
function select_string($n) {
|
|
if (is_null($this->select_string_function)) {
|
|
$string = $this->get_plural_forms();
|
|
if (preg_match("/nplurals\s*=\s*(\d+)\s*\;\s*plural\s*=\s*(.*?)\;+/", $string, $matches)) {
|
|
$nplurals = $matches[1];
|
|
$expression = $matches[2];
|
|
$expression = str_replace("n", '$n', $expression);
|
|
} else {
|
|
$nplurals = 2;
|
|
$expression = ' $n == 1 ? 0 : 1 ';
|
|
}
|
|
$func_body = "
|
|
\$plural = ($expression);
|
|
return (\$plural <= $nplurals)? \$plural : \$plural - 1;";
|
|
$this->select_string_function = create_function('$n', $func_body);
|
|
}
|
|
return call_user_func($this->select_string_function, $n);
|
|
}
|
|
|
|
/**
|
|
* Plural version of gettext
|
|
*
|
|
* @access public
|
|
* @param string single
|
|
* @param string plural
|
|
* @param string number
|
|
* @return translated plural form
|
|
*/
|
|
function ngettext($single, $plural, $number) {
|
|
if ($this->short_circuit) {
|
|
if ($number != 1)
|
|
return $plural;
|
|
else
|
|
return $single;
|
|
}
|
|
|
|
// find out the appropriate form
|
|
$select = $this->select_string($number);
|
|
|
|
// this should contains all strings separated by NULLs
|
|
$key = $single.chr(0).$plural;
|
|
|
|
|
|
if ($this->enable_cache) {
|
|
if (! array_key_exists($key, $this->cache_translations)) {
|
|
return ($number != 1) ? $plural : $single;
|
|
} else {
|
|
$result = $this->cache_translations[$key];
|
|
$list = explode(chr(0), $result);
|
|
return $list[$select];
|
|
}
|
|
} else {
|
|
$num = $this->find_string($key);
|
|
if ($num == -1) {
|
|
return ($number != 1) ? $plural : $single;
|
|
} else {
|
|
$result = $this->get_translation_string($num);
|
|
$list = explode(chr(0), $result);
|
|
return $list[$select];
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
?>
|