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Main Page | Modules | Namespace List | Class Hierarchy | Alphabetical List | Class List | File List | Namespace Members | Class Members | Related Pages | Search for 1 document matching your query."; } else // $num>1 { return "Found $num documents matching your query. Showing best matches first."; } } function report_matches() { return "Matches: "; } function readInt($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) { 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 first two characters { $start=sizeof($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 $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$key, "name"=>$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 "\n"; echo " \n"; echo " \n"; echo " \n"; $numDocs = sizeof($docs); if ($numDocs==0) { echo " \n"; echo " \n"; echo " \n"; } else { echo " \n"; echo " \n"; echo " \n"; $num=1; foreach ($docs as $doc) { echo " \n"; echo " "; echo "\n"; echo " \n"; echo " \n"; echo " \n"; $num++; } } echo "

".search_results()."
".matches_text(0)."
".matches_text($numDocs); echo "\n"; echo "
$num.	".$doc["name"]."
	".report_matches()." "; foreach ($doc["words"] as $wordInfo) { $word = $wordInfo["word"]; $matchRight = substr($wordInfo["match"],strlen($word)); echo "$word$matchRight(".$wordInfo["freq"].") "; } echo "

\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"]; } echo "\n"; echo "\n"; echo "

\n"; echo "

".search_results()."