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<?php
// ><html><body><h1> Sorry, no php enabled, this won't work! </h1></body></html><!--
// settings:
$top = 'ACL2____TOP'; // top topic
$notFound = 'DOCNOTFOUND'; // not found topic
$index = 'DOCINDEX'; // index page
$basedir=pathinfo($_SERVER["SCRIPT_NAME"],PATHINFO_DIRNAME)."/";
$scriptdir=$_SERVER["SCRIPT_NAME"].'/';
error_reporting(E_ALL);
ini_set('display_errors', 1);
// function to prevent SQL injection attacks. Unfortunately, there
// seems to be no alternative for SQLite, and no documentation on
// what the function does exactly, so we err on the safe side:
if(!function_exists('sqlite_escape_string')){
function sqlite_escape_string($string) {
// only allow characters which we know occur in the keys
if (preg_match('/^[-._A-Za-z0-9]+$/',$string)===false)
// returns 0 on a match, which evaluates to false, so we need a
// check with three ='s
return '';
else return $string; // the string is safe!
}
}
class MyDB extends SQLite3
{
function __construct()
{
$this->open('xdata-seo.db');
}
}
$db = new MyDB();
if(!$db){
echo $db->lastErrorMsg();
exit();
}
if(isset($_SERVER["PATH_INFO"]) && (strlen($_SERVER["PATH_INFO"])>1))
$key = pathinfo($_SERVER["PATH_INFO"],PATHINFO_BASENAME);
else $key = $top;
$showIndex=false;
if($key=="*") {$showIndex=true;$key=$index;unset($_GET['path']);}
$ret = $db->query("SELECT * from xdoc_data where XKEY='".sqlite_escape_string($key)."'");
$page = $ret->fetchArray(SQLITE3_ASSOC);
if(!$page || $page['XKEY']!=$key){
header("HTTP/1.0 404 Not Found");
$key = $notFound;
$ret = $db->query("SELECT * from xdoc_data where XKEY='".$key."'");
$page = $ret->fetchArray(SQLITE3_ASSOC);
}else
if(!$showIndex){
$preferedURL=$scriptdir.$page['XKEY'];
header("Content-Location: ".$preferedURL);
}
if(!$page) { // fallback when not even the 404 page was found
header("Location: ".$scriptdir);
die();
}
$lookup = array($page['ID']=>$page);
$lookupx = array($page['XKEY']=>$page);
if(isset($_GET['path'])) $path_idea = explode('/',$_GET['path']); else $path_idea = array();
$path_reversed=array();
$cur = $page;
$parents = explode(',',substr($cur['PARENTIDS'],1,-1));
while (count($parents)) {
$candidates = array_intersect($path_idea,$parents);
if(count($candidates)){ // found something (hopefully one)
$path_idea = array_diff($path_idea,$parents);
$nextID = array_pop($candidates);
}else{
$nextID = $parents[0]; // nothing found, pick first parent
}
if(isset($lookup[$nextID])){ // loop found! Abort
$parents = array();
}else{
$ret = $db->query("SELECT * from xdoc_data where ID='".sqlite_escape_string($nextID)."'");
$cur = $ret->fetchArray(SQLITE3_ASSOC);
if($cur){
$lookup[$cur['ID']] = $cur;
$path_reversed[] = $cur['ID'];
$parents = explode(',',substr($cur['PARENTIDS'],1,-1));
}else $parents = array();
}
}; // while (count($parents));
$path=$page['ID'];
foreach($path_reversed as $itm){
$path=$itm.'/'.$path;
}
function lookup_by_id($id){
global $lookup, $lookupx, $db;
if(!isset($lookup[$id])){
$ret = $db->query("SELECT * from xdoc_data where ID='".sqlite_escape_string($id)."'");
$cur = $ret->fetchArray(SQLITE3_ASSOC);
$lookup[$cur['ID']] = $cur;
$lookupx[$cur['XKEY']] = $cur;
}
return $lookup[$id];
}
function lookup_by_xkey($xkey){
global $lookup, $lookupx, $db;
if(!isset($lookupx[$xkey])){
$ret = $db->query("SELECT * from xdoc_data where XKEY='".sqlite_escape_string($xkey)."'");
$cur = $ret->fetchArray(SQLITE3_ASSOC);
$lookup[$cur['ID']] = $cur;
$lookupx[$cur['XKEY']] = $cur;
}
return $lookupx[$xkey];
}
function disp($str){
global $scriptdir;
echo str_replace(
array('<see topic="' ,'</see>','<code>' ,'</code>')
,array('<a href="'.$scriptdir,'</a>' ,'<pre class="code">','</pre>')
,$str);
}
?><!DOCTYPE html>
<html>
<head>
<?php
if(isset($preferedURL)){ echo '<link rel="canonical" href="http://'.$_SERVER['SERVER_NAME'].$preferedURL.'" />'; }
?>
<meta charset="UTF-8">
<!--
; Original author: Jared Davis <jared@centtech.com>
; PHP version by Sebastiaan Joosten
; Content by various authors
-->
<title><?php echo($page['PACKAGE'] .' - '. $page['TITLE']); ?></title>
<link rel="stylesheet" type="text/css" href="<?= $basedir ?>desktop.css"/>
<link rel="shortcut icon" href="<?= $basedir ?>favicon.png"/>
</head>
<body>
<div id="top">
<table border="0" id="toolbar">
<tr>
<th>
<a href="<?= $scriptdir ?>ACL2____TOP">
<img class="toolbutton" src="<?= $basedir ?>xdoc-home.png"
data-powertip="<p>Go to the Top topic.</p>">
</a> </th><th>
<a href="<?= $scriptdir ?>*">
<img class="toolbutton" src="<?= $basedir ?>view_flat.png"
data-powertip="<p>View sitemap.</p>"/>
</a>
<a target="DownloadWindow" href="<?= $basedir ?>download/manual.zip">
<img class="rtoolbutton" src="<?= $basedir ?>download.png"
data-powertip="<p>Download a zipped copy of this manual (for
faster or offline browsing).</p>"/>
</a>
</th>
<td><label style="color:white">
Search-engine friendly clone of the <a href="http://www.cs.utexas.edu/users/moore/acl2/manuals/current/manual/" style="color:white;text-decoration:underline">ACL2 documentation</a>.
</label>
</td>
</tr>
</table>
</div>
<div id="left">
<div id="nav"><UL>
<?php
$cur = lookup_by_xkey($top);
$path_reversed[] = $page['ID'];
function show_rec($cur,$newpath){
global $path_reversed, $scriptdir;
echo '<LI style="list-style-type:';
if(strlen($cur['CHILDREN'])) echo 'disc'; else echo 'circle';
echo '"><nobr><A HREF="'.$scriptdir.$cur['XKEY'].'?path='.$newpath.'" title="'.htmlentities(strip_tags($cur['SHORTDESC'])).'">'.$cur['TITLE'].'</A></nobr>';
if(array_search($cur['ID'],$path_reversed)!==FALSE){
$children=explode(',',$cur['CHILDREN']);
if(count($children)){
echo '<UL>';
for($i=1;$i<count($children);$i++){
$kid=lookup_by_xkey($children[$i]);
show_rec($kid,$newpath.'/'.$kid['ID']);
}
echo '</UL>';
}
}
}
show_rec($cur,$cur['ID']);
?></UL>
</div>
</div>
<div id="right">
<?php
$ps=explode(',',substr($page['PARENTIDS'],1,-1));
function ispos($x){return strlen($x)&&(-$x<1);}
$ps = array_filter($ps,"ispos");
if(count($ps)){ ?>
<div id="parents">
<UL> <?php
foreach($ps as $id){
$cur=lookup_by_id($id);
echo '<li><a id="'.$id.'" href="'.$scriptdir.$cur['XKEY'].'?path='.$path.'"';
echo ' title="'.htmlentities(strip_tags($cur['SHORTDESC'])).'">'.$cur['TITLE'].'</a></li>';
} ?>
</UL></div><?php
}
?>
<div id="data">
<H1><?php echo $page['TITLE']; ?></H1>
<P align="center"><?php
disp($page['SHORTDESC']);
?></P>
<?php
disp($page['LONGDESC']);
if($showIndex){
echo '<UL>';
$ret = $db->query("SELECT XKEY,TITLE,SHORTDESC,PACKAGE from xdoc_data ORDER BY TITLE");
while($cur=$ret->fetchArray(SQLITE3_ASSOC)){
if(strlen($cur['PACKAGE'])){
echo '<LI><a href="'.$scriptdir.$cur['XKEY'].'" title="'.htmlentities(strip_tags($cur['SHORTDESC'])).'">';
echo $cur['TITLE'];
echo '</a></li>';
}
}
echo '</UL>';
}else
if(strlen($page['CHILDREN'])){
?><H3>Subtopics</H3>
<DL>
<?php
$childs = explode(',',$page['CHILDREN']);
for($i=1;$i<count($childs);$i++){
$cur = lookup_by_xkey($childs[$i]);
echo '<DT><a href="'.$scriptdir.$cur['XKEY'].'?path='.$path.'">';
echo $cur['TITLE'];
echo '</a></dt><dd>';
disp($cur['SHORTDESC']);
echo'</dd>';
}
}
$db->close();
?>
</div>
</div>
</body>
</html>
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