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authordimitri <dimitri@afe2bf4a-e733-0410-8a33-86f594647bc7>2009-08-14 14:49:07 (GMT)
committerdimitri <dimitri@afe2bf4a-e733-0410-8a33-86f594647bc7>2009-08-14 14:49:07 (GMT)
commit9e6be9a8ae24b788cf2463a703bda48cbd77c773 (patch)
treefed426d0d7216311cbd009a1fcd2786176478b5e /src/search.php
parent6e28050ef5483e624122b0bacb998c40664f78ee (diff)
downloadDoxygen-9e6be9a8ae24b788cf2463a703bda48cbd77c773.zip
Doxygen-9e6be9a8ae24b788cf2463a703bda48cbd77c773.tar.gz
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Release-1.5.9-20090814
Diffstat (limited to 'src/search.php')
-rw-r--r--src/search.php324
1 files changed, 0 insertions, 324 deletions
diff --git a/src/search.php b/src/search.php
deleted file mode 100644
index f86184c..0000000
--- a/src/search.php
+++ /dev/null
@@ -1,324 +0,0 @@
-function readInt($file)
-{
- $b1 = ord(fgetc($file)); $b2 = ord(fgetc($file));
- $b3 = ord(fgetc($file)); $b4 = ord(fgetc($file));
- return ($b1<<24)|($b2<<16)|($b3<<8)|$b4;
-}
-
-function readString($file)
-{
- $result="";
- while (ord($c=fgetc($file))) $result.=$c;
- return $result;
-}
-
-function readHeader($file)
-{
- $header =fgetc($file); $header.=fgetc($file);
- $header.=fgetc($file); $header.=fgetc($file);
- return $header;
-}
-
-function computeIndex($word)
-{
- // Fast string hashing
- //$lword = strtolower($word);
- //$l = strlen($lword);
- //for ($i=0;$i<$l;$i++)
- //{
- // $c = ord($lword{$i});
- // $v = (($v & 0xfc00) ^ ($v << 6) ^ $c) & 0xffff;
- //}
- //return $v;
-
- // Simple hashing that allows for substring search
- if (strlen($word)<2) return -1;
- // high char of the index
- $hi = ord($word{0});
- if ($hi==0) return -1;
- // low char of the index
- $lo = ord($word{1});
- if ($lo==0) return -1;
- // return index
- return $hi*256+$lo;
-}
-
-function search($file,$word,&$statsList)
-{
- $index = computeIndex($word);
- if ($index!=-1) // found a valid index
- {
- fseek($file,$index*4+4); // 4 bytes per entry, skip header
- $index = readInt($file);
- if ($index) // found words matching the hash key
- {
- $start=sizeof($statsList);
- $count=$start;
- fseek($file,$index);
- $w = readString($file);
- while ($w)
- {
- $statIdx = readInt($file);
- if ($word==substr($w,0,strlen($word)))
- { // found word that matches (as substring)
- $statsList[$count++]=array(
- "word"=>$word,
- "match"=>$w,
- "index"=>$statIdx,
- "full"=>strlen($w)==strlen($word),
- "docs"=>array()
- );
- }
- $w = readString($file);
- }
- $totalHi=0;
- $totalFreqHi=0;
- $totalFreqLo=0;
- for ($count=$start;$count<sizeof($statsList);$count++)
- {
- $statInfo = &$statsList[$count];
- $multiplier = 1;
- // whole word matches have a double weight
- if ($statInfo["full"]) $multiplier=2;
- fseek($file,$statInfo["index"]);
- $numDocs = readInt($file);
- $docInfo = array();
- // read docs info + occurrence frequency of the word
- for ($i=0;$i<$numDocs;$i++)
- {
- $idx=readInt($file);
- $freq=readInt($file);
- $docInfo[$i]=array("idx" => $idx,
- "freq" => $freq>>1,
- "rank" => 0.0,
- "hi" => $freq&1
- );
- if ($freq&1) // word occurs in high priority doc
- {
- $totalHi++;
- $totalFreqHi+=$freq*$multiplier;
- }
- else // word occurs in low priority doc
- {
- $totalFreqLo+=$freq*$multiplier;
- }
- }
- // read name and url info for the doc
- for ($i=0;$i<$numDocs;$i++)
- {
- fseek($file,$docInfo[$i]["idx"]);
- $docInfo[$i]["name"]=readString($file);
- $docInfo[$i]["url"]=readString($file);
- }
- $statInfo["docs"]=$docInfo;
- }
- $totalFreq=($totalHi+1)*$totalFreqLo + $totalFreqHi;
- for ($count=$start;$count<sizeof($statsList);$count++)
- {
- $statInfo = &$statsList[$count];
- $multiplier = 1;
- // whole word matches have a double weight
- if ($statInfo["full"]) $multiplier=2;
- for ($i=0;$i<sizeof($statInfo["docs"]);$i++)
- {
- $docInfo = &$statInfo["docs"];
- // compute frequency rank of the word in each doc
- $freq=$docInfo[$i]["freq"];
- if ($docInfo[$i]["hi"])
- {
- $statInfo["docs"][$i]["rank"]=
- (float)($freq*$multiplier+$totalFreqLo)/$totalFreq;
- }
- else
- {
- $statInfo["docs"][$i]["rank"]=
- (float)($freq*$multiplier)/$totalFreq;
- }
- }
- }
- }
- }
- return $statsList;
-}
-
-function combine_results($results,&$docs)
-{
- foreach ($results as $wordInfo)
- {
- $docsList = &$wordInfo["docs"];
- foreach ($docsList as $di)
- {
- $key=$di["url"];
- $rank=$di["rank"];
- if (in_array($key, array_keys($docs)))
- {
- $docs[$key]["rank"]+=$rank;
- }
- else
- {
- $docs[$key] = array("url"=>$key,
- "name"=>$di["name"],
- "rank"=>$rank
- );
- }
- $docs[$key]["words"][] = array(
- "word"=>$wordInfo["word"],
- "match"=>$wordInfo["match"],
- "freq"=>$di["freq"]
- );
- }
- }
- return $docs;
-}
-
-function filter_results($docs,&$requiredWords,&$forbiddenWords)
-{
- $filteredDocs=array();
- while (list ($key, $val) = each ($docs))
- {
- $words = &$docs[$key]["words"];
- $copy=1; // copy entry by default
- if (sizeof($requiredWords)>0)
- {
- foreach ($requiredWords as $reqWord)
- {
- $found=0;
- foreach ($words as $wordInfo)
- {
- $found = $wordInfo["word"]==$reqWord;
- if ($found) break;
- }
- if (!$found)
- {
- $copy=0; // document contains none of the required words
- break;
- }
- }
- }
- if (sizeof($forbiddenWords)>0)
- {
- foreach ($words as $wordInfo)
- {
- if (in_array($wordInfo["word"],$forbiddenWords))
- {
- $copy=0; // document contains a forbidden word
- break;
- }
- }
- }
- if ($copy) $filteredDocs[$key]=$docs[$key];
- }
- return $filteredDocs;
-}
-
-function compare_rank($a,$b)
-{
- if ($a["rank"] == $b["rank"])
- {
- return 0;
- }
- return ($a["rank"]>$b["rank"]) ? -1 : 1;
-}
-
-function sort_results($docs,&$sorted)
-{
- $sorted = $docs;
- usort($sorted,"compare_rank");
- return $sorted;
-}
-
-function report_results(&$docs)
-{
- echo "<table cellspacing=\"2\">\n";
- echo " <tr>\n";
- echo " <td colspan=\"2\"><h2>".search_results()."</h2></td>\n";
- echo " </tr>\n";
- $numDocs = sizeof($docs);
- if ($numDocs==0)
- {
- echo " <tr>\n";
- echo " <td colspan=\"2\">".matches_text(0)."</td>\n";
- echo " </tr>\n";
- }
- else
- {
- echo " <tr>\n";
- echo " <td colspan=\"2\">".matches_text($numDocs);
- echo "\n";
- echo " </td>\n";
- echo " </tr>\n";
- $num=1;
- foreach ($docs as $doc)
- {
- echo " <tr>\n";
- echo " <td align=\"right\">$num.</td>";
- echo "<td><a class=\"el\" href=\"".$doc["url"]."\">".$doc["name"]."</a></td>\n";
- echo " <tr>\n";
- echo " <td></td><td class=\"tiny\">".report_matches()." ";
- foreach ($doc["words"] as $wordInfo)
- {
- $word = $wordInfo["word"];
- $matchRight = substr($wordInfo["match"],strlen($word));
- echo "<b>$word</b>$matchRight(".$wordInfo["freq"].") ";
- }
- echo " </td>\n";
- echo " </tr>\n";
- $num++;
- }
- }
- echo "</table>\n";
-}
-
-function main()
-{
- if(strcmp('4.1.0', phpversion()) > 0)
- {
- die("Error: PHP version 4.1.0 or above required!");
- }
- if (!($file=fopen("search.idx","rb")))
- {
- die("Error: Search index file could NOT be opened!");
- }
- if (readHeader($file)!="DOXS")
- {
- die("Error: Header of index file is invalid!");
- }
- $query="";
- if (array_key_exists("query", $_GET))
- {
- $query=$_GET["query"];
- }
- end_form(ereg_replace("[^[:alnum:]:\\.\\t ]", " ", $query ));
- echo "&nbsp;\n<div class=\"searchresults\">\n";
- $results = array();
- $requiredWords = array();
- $forbiddenWords = array();
- $foundWords = array();
- $word=strtok($query," ");
- while ($word) // for each word in the search query
- {
- if (($word{0}=='+')) { $word=substr($word,1); $requiredWords[]=$word; }
- if (($word{0}=='-')) { $word=substr($word,1); $forbiddenWords[]=$word; }
- if (!in_array($word,$foundWords))
- {
- $foundWords[]=$word;
- search($file,strtolower($word),$results);
- }
- $word=strtok(" ");
- }
- $docs = array();
- combine_results($results,$docs);
- // filter out documents with forbidden word or that do not contain
- // required words
- $filteredDocs = filter_results($docs,$requiredWords,$forbiddenWords);
- // sort the results based on rank
- $sorted = array();
- sort_results($filteredDocs,$sorted);
- // report results to the user
- report_results($sorted);
- echo "</div>\n";
- fclose($file);
-}
-
-main();
-