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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;
- $MAGIC2 = (int)0xde120495;
-
-
- $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];
- $this->STREAM->seekto($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];
- }
- }
-
- }
-
-
- ?>