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TraceParser.php
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TraceParser.php
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<?php
/**
* @file
* The main trace parser.
*/
/**
* This class parses trace files and notifies observers of events.
*/
class TraceParser {
protected $filename;
protected $observers;
/**
* Construct a new TraceParser.
*
* A trace parser parses an Xdebug function trace (xt) file and notifies
* observers of events as it parses.
*
* @param string $filename
* The name of the XT file to parse.
*
* @see http://xdebug.org/docs/execution_trace
*/
public function __construct($filename) {
$this->filename = $filename;
$this->observers = array();
}
/**
* Register an observer.
*/
public function register(TraceParserObserver $observer) {
$this->observers[] = $observer;
}
/**
* Parse the file and notify the observers of events.
*/
public function parse() {
$handle = fopen($this->filename, 'r');
while ($line = fgets($handle)) {
$fields = explode("\t", $line);
// Get start/end messages
$count = count($fields);
if ($count == 2) {
$timestamp = $fields[1];
if (strpos('TRACE END', $fields[0]) === 0) {
foreach ($this->observers as $o) $o->endEntry($timestamp);
}
else {
foreach ($this->observers as $o) $o->startEntry($timestamp);
}
}
// Otherwise we want enter/exit function traces.
elseif ($count >= 5) {
// ENTER function
if ($fields[2] == "0") {
foreach ($this->observers as $o) $o->enterFunction(
(int)$fields[0],
(int)$fields[1],
(float)$fields[3],
(int)$fields[4],
$fields[5],
$fields[6] == "0",
$fields[8],
(int)$fields[9],
$fields[7]
);
}
// EXIT function
else {
foreach ($this->observers as $o) $o->exitFunction(
(int)$fields[0],
(int)$fields[1],
(float)$fields[3],
(int)$fields[4]
);
}
}
}
fclose($handle);
}
}
/**
* The trace parser observer.
*
* Any trace parser observers should implement this interface.
*/
interface TraceParserObserver {
public function startEntry($timestamp);
public function endEntry($timestamp);
public function enterFunction($depth, $function_id, $elapsed_time, $memory_consumption, $function_name, $is_internal, $filename, $line, $included_from = NULL);
public function exitFunction($depth, $function_id, $elapsed_time, $memory_consumption);
}
?>