WordPress/wp-includes/gettext.php

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<?php
/*
Copyright (c) 2003 Danilo Segan <danilo@kvota.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
*/
// For start, we only want to read the MO files
class gettext_reader {
//public:
var $error = 0; // public variable that holds error code (0 if no error)
//private:
var $BYTEORDER = 0;
var $STREAM = NULL;
var $short_circuit = false;
function readint() {
// Reads 4 byte value from $FD and puts it in int
// $BYTEORDER specifies the byte order: 0 low endian, 1 big endian
for ($i=0; $i<4; $i++) {
$byte[$i]=ord($this->STREAM->read(1));
}
//print sprintf("pos: %d\n",$this->STREAM->currentpos());
if ($this->BYTEORDER == 0)
return (int)(($byte[0]) | ($byte[1]<<8) | ($byte[2]<<16) | ($byte[3]<<24));
else
return (int)(($byte[3]) | ($byte[2]<<8) | ($byte[1]<<16) | ($byte[0]<<24));
}
// constructor that requires StreamReader object
function gettext_reader($Reader) {
// If there isn't a StreamReader, turn on short circuit mode.
if (! $Reader) {
$this->short_circuit = true;
return;
}
// $MAGIC1 = (int)0x950412de; //bug in PHP 5
$MAGIC1 = (int) - 1794895138;
// $MAGIC2 = (int)0xde120495; //bug
$MAGIC2 = (int) - 569244523;
$this->STREAM = $Reader;
$magic = $this->readint();
if ($magic == $MAGIC1) {
$this->BYTEORDER = 0;
} elseif ($magic == $MAGIC2) {
$this->BYTEORDER = 1;
} else {
$this->error = 1; // not MO file
return false;
}
// FIXME: Do we care about revision? We should.
$revision = $this->readint();
$total = $this->readint();
$originals = $this->readint();
$translations = $this->readint();
$this->total = $total;
$this->originals = $originals;
$this->translations = $translations;
}
function load_tables($translations=false) {
// if tables are loaded do not load them again
if (!is_array($this->ORIGINALS)) {
$this->ORIGINALS = array();
$this->STREAM->seekto($this->originals);
for ($i=0; $i<$this->total; $i++) {
$len = $this->readint();
$ofs = $this->readint();
$this->ORIGINALS[] = array($len,$ofs);
}
}
// similar for translations
if ($translations and !is_array($this->TRANSLATIONS)) {
$this->TRANSLATIONS = array();
$this->STREAM->seekto($this->translations);
for ($i=0; $i<$this->total; $i++) {
$len = $this->readint();
$ofs = $this->readint();
$this->TRANSLATIONS[] = array($len,$ofs);
}
}
}
function get_string_number($num) {
// get a string with particular number
// TODO: Add simple hashing [check array, add if not already there]
$this->load_tables();
$meta = $this->ORIGINALS[$num];
$length = $meta[0];
$offset = $meta[1];
if (! $length) {
return '';
}
$this->STREAM->seekto($offset);
$data = $this->STREAM->read($length);
return (string)$data;
}
function get_translation_number($num) {
// get a string with particular number
// TODO: Add simple hashing [check array, add if not already there]
$this->load_tables(true);
$meta = $this->TRANSLATIONS[$num];
$length = $meta[0];
$offset = $meta[1];
$this->STREAM->seekto($offset);
$data = $this->STREAM->read($length);
return (string)$data;
}
// binary search for string
function find_string($string, $start,$end) {
//print "start: $start, end: $end\n";
if (abs($start-$end)<=1) {
// we're done, if it's not it, bye bye
$txt = $this->get_string_number($start);
if ($string == $txt)
return $start;
else
return -1;
} elseif ($start>$end) {
return $this->find_string($string,$end,$start);
} else {
$half = (int)(($start+$end)/2);
$tst = $this->get_string_number($half);
$cmp = strcmp($string,$tst);
if ($cmp == 0)
return $half;
elseif ($cmp<0)
return $this->find_string($string,$start,$half);
else
return $this->find_string($string,$half,$end);
}
}
function translate($string) {
if ($this->short_circuit) {
return $string;
}
$num = $this->find_string($string, 0, $this->total);
if ($num == -1)
return $string;
else
return $this->get_translation_number($num);
}
function get_plural_forms() {
// lets assume message number 0 is header
// this is true, right?
// cache header field for plural forms
if (is_string($this->pluralheader))
return $this->pluralheader;
else {
$header = $this->get_translation_number(0);
if (eregi("plural-forms: (.*)\n",$header,$regs)) {
$expr = $regs[1];
} else {
$expr = "nplurals=2; plural=n == 1 ? 0 : 1;";
}
$this->pluralheader = $expr;
return $expr;
}
}
function select_string($n) {
$string = $this->get_plural_forms();
$string = str_replace('nplurals',"\$total",$string);
$string = str_replace("n",$n,$string);
$string = str_replace('plural',"\$plural",$string);
$total = 0;
$plural = 0;
eval("$string");
if ($plural>=$total) $plural = 0;
return $plural;
}
function ngettext($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
$result = $this->find_string($single.chr(0).$plural,0,$this->total);
if ($result == -1) {
if ($number != 1) return $plural;
else return $single;
} else {
$result = $this->get_translation_number($result);
// lets try to parse all the NUL staff
//$result = "proba0".chr(0)."proba1".chr(0)."proba2";
$list = explode (chr(0), $result);
return $list[$select];
}
}
}
?>