/**
* The real highlighting function
* @throw InvalidArgumentException if $scanner is not either a string or a
* LuminousScanner instance, or if $source is not a string.
*/
function highlight($scanner, $source, $use_cache = true)
{
if (!is_string($source)) {
throw new InvalidArgumentException('Non-string ' . 'supplied for $source');
}
if (!$scanner instanceof LuminousScanner) {
if (!is_string($scanner)) {
throw new InvalidArgumentException('Non-string
or LuminousScanner instance supllied for $scanner');
}
$code = $scanner;
$scanner = $this->scanners->GetScanner($code);
if ($scanner === null) {
throw new Exception("No known scanner for '{$code}' and no default set");
}
}
$cache_obj = null;
$cache_hit = true;
$out = null;
if ($use_cache) {
$cache_id = $this->cache_id($scanner, $source);
if ($this->settings->sql_function !== null) {
$cache_obj = new LuminousSQLCache($cache_id);
$cache_obj->set_sql_function($this->settings->sql_function);
} else {
$cache_obj = new LuminousFileSystemCache($cache_id);
}
$cache_obj->set_purge_time($this->settings->cache_age);
$out = $cache_obj->read();
}
if ($out === null) {
$cache_hit = false;
$out_raw = $scanner->highlight($source);
$formatter = $this->get_formatter();
$out = $formatter->format($out_raw);
}
if ($use_cache && !$cache_hit) {
$cache_obj->write($out);
}
return $out;
}
$write_fs = array();
for ($i = 0; $i < 1000; $i++) {
$data = '';
for ($j = 0; $j < 1024 / 8; $j++) {
// unrolled for speed
$data .= chr(rand(32, 126));
$data .= chr(rand(32, 126));
$data .= chr(rand(32, 126));
$data .= chr(rand(32, 126));
$data .= chr(rand(32, 126));
$data .= chr(rand(32, 126));
$data .= chr(rand(32, 126));
$data .= chr(rand(32, 126));
}
$id = md5($data);
$sql_cache = new LuminousSQLCache($id);
$sql_cache->set_sql_function('query');
$t = microtime(true);
$sql_cache->write($data);
$t1 = microtime(true);
$data1 = $sql_cache->read();
$t2 = microtime(true);
$read_sql[] = $t2 - $t1;
$write_sql[] = $t1 - $t;
assert($data === $data1);
$fs_cache = new LuminousFileSystemCache($id);
$t = microtime(true);
$fs_cache->write($data);
$t1 = microtime(true);
$data1 = $fs_cache->read();
$t2 = microtime(true);