232 lines
6.3 KiB
PHP
Executable File
232 lines
6.3 KiB
PHP
Executable File
<?php
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/*
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Copyright (c) 2003 Danilo Segan <danilo@kvota.net>.
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This file is part of PHP-gettext.
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PHP-gettext is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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PHP-gettext is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with PHP-gettext; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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// For start, we only want to read the MO files
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class gettext_reader {
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//public:
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var $error = 0; // public variable that holds error code (0 if no error)
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//private:
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var $BYTEORDER = 0;
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var $STREAM = NULL;
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var $short_circuit = false;
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function readint() {
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// Reads 4 byte value from $FD and puts it in int
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// $BYTEORDER specifies the byte order: 0 low endian, 1 big endian
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for ($i=0; $i<4; $i++) {
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$byte[$i]=ord($this->STREAM->read(1));
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}
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//print sprintf("pos: %d\n",$this->STREAM->currentpos());
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if ($this->BYTEORDER == 0)
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return (int)(($byte[0]) | ($byte[1]<<8) | ($byte[2]<<16) | ($byte[3]<<24));
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else
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return (int)(($byte[3]) | ($byte[2]<<8) | ($byte[1]<<16) | ($byte[0]<<24));
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}
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// constructor that requires StreamReader object
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function gettext_reader($Reader) {
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// If there isn't a StreamReader, turn on short circuit mode.
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if (! $Reader) {
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$this->short_circuit = true;
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return;
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}
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$MAGIC1 = (int)0x950412de;
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$MAGIC2 = (int)0xde120495;
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$this->STREAM = $Reader;
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$magic = $this->readint();
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if ($magic == $MAGIC1) {
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$this->BYTEORDER = 0;
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} elseif ($magic == $MAGIC2) {
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$this->BYTEORDER = 1;
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} else {
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$this->error = 1; // not MO file
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return false;
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}
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// FIXME: Do we care about revision? We should.
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$revision = $this->readint();
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$total = $this->readint();
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$originals = $this->readint();
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$translations = $this->readint();
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$this->total = $total;
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$this->originals = $originals;
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$this->translations = $translations;
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}
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function load_tables($translations=false) {
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// if tables are loaded do not load them again
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if (!is_array($this->ORIGINALS)) {
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$this->ORIGINALS = array();
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$this->STREAM->seekto($this->originals);
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for ($i=0; $i<$this->total; $i++) {
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$len = $this->readint();
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$ofs = $this->readint();
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$this->ORIGINALS[] = array($len,$ofs);
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}
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}
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// similar for translations
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if ($translations and !is_array($this->TRANSLATIONS)) {
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$this->TRANSLATIONS = array();
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$this->STREAM->seekto($this->translations);
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for ($i=0; $i<$this->total; $i++) {
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$len = $this->readint();
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$ofs = $this->readint();
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$this->TRANSLATIONS[] = array($len,$ofs);
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}
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}
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}
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function get_string_number($num) {
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// get a string with particular number
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// TODO: Add simple hashing [check array, add if not already there]
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$this->load_tables();
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$meta = $this->ORIGINALS[$num];
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$length = $meta[0];
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$offset = $meta[1];
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$this->STREAM->seekto($offset);
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$data = $this->STREAM->read($length);
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return (string)$data;
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}
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function get_translation_number($num) {
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// get a string with particular number
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// TODO: Add simple hashing [check array, add if not already there]
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$this->load_tables(true);
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$meta = $this->TRANSLATIONS[$num];
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$length = $meta[0];
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$offset = $meta[1];
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$this->STREAM->seekto($offset);
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$data = $this->STREAM->read($length);
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return (string)$data;
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}
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// binary search for string
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function find_string($string, $start,$end) {
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//print "start: $start, end: $end\n";
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if (abs($start-$end)<=1) {
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// we're done, if it's not it, bye bye
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$txt = $this->get_string_number($start);
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if ($string == $txt)
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return $start;
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else
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return -1;
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} elseif ($start>$end) {
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return $this->find_string($string,$end,$start);
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} else {
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$half = (int)(($start+$end)/2);
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$tst = $this->get_string_number($half);
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$cmp = strcmp($string,$tst);
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if ($cmp == 0)
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return $half;
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elseif ($cmp<0)
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return $this->find_string($string,$start,$half);
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else
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return $this->find_string($string,$half,$end);
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}
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}
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function translate($string) {
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if ($this->short_circuit) {
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return $string;
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}
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$num = $this->find_string($string, 0, $this->total);
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if ($num == -1)
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return $string;
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else
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return $this->get_translation_number($num);
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}
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function get_plural_forms() {
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// lets assume message number 0 is header
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// this is true, right?
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// cache header field for plural forms
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if (is_string($this->pluralheader))
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return $this->pluralheader;
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else {
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$header = $this->get_translation_number(0);
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if (eregi("plural-forms: (.*)\n",$header,$regs)) {
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$expr = $regs[1];
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} else {
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$expr = "nplurals=2; plural=n == 1 ? 0 : 1;";
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}
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$this->pluralheader = $expr;
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return $expr;
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}
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}
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function select_string($n) {
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$string = $this->get_plural_forms();
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$string = str_replace('nplurals',"\$total",$string);
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$string = str_replace("n",$n,$string);
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$string = str_replace('plural',"\$plural",$string);
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$total = 0;
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$plural = 0;
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eval("$string");
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if ($plural>=$total) $plural = 0;
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return $plural;
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}
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function ngettext($single, $plural, $number) {
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if ($this->short_circuit) {
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if ($number != 1) return $plural;
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else return $single;
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}
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// find out the appropriate form
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$select = $this->select_string($number);
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// this should contains all strings separated by NULLs
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$result = $this->find_string($single.chr(0).$plural,0,$this->total);
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if ($result == -1) {
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if ($number != 1) return $plural;
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else return $single;
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} else {
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$result = $this->get_translation_number($result);
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// lets try to parse all the NUL staff
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//$result = "proba0".chr(0)."proba1".chr(0)."proba2";
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$list = explode (chr(0), $result);
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return $list[$select];
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}
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}
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}
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?>
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