public function getColumns()
{
$this->columnsLockFile->acquireRead();
if ($this->columnsLockFile->wasModified()) {
$this->columnsLockFile->accept();
$this->columnsFile->acquireRead();
$columnsHandle = $this->columnsFile->getHandle();
$line = fgets($columnsHandle);
if (!preg_match("/^(\\d+)/", $line, $matches)) {
$this->columnsFile->releaseRead();
$this->columnsLockFile->releaseRead();
return false;
}
$num_columns = $matches[1];
for ($i = 0; $i < $num_columns; ++$i) {
$line = fgets($columnsHandle, 4096);
if (preg_match("/(\\S+): (dt|d|i|f|s|t|e);(.*);(0|1);(-?\\d+(?:\\.\\d+)?|'.*'|NULL);(p|u|k|n);(0|1);/", $line, $matches)) {
$name = $matches[1];
$type = $matches[2];
$restraintString = $matches[3];
$auto = (int) $matches[4];
$default = $matches[5];
$null = (int) $matches[7];
if ($type === Types::INTEGER) {
$default = (int) $default;
} elseif ($type === Types::FLOAT) {
$default = (double) $default;
} elseif ($default[0] == "'" && substr($default, -1) == "'") {
$default = substr($default, 1, -1);
} elseif ($default === 'NULL') {
$default = null;
}
if ($auto === 1 && !empty($restraintString)) {
list($current, $always, $start, $increment, $min, $max, $cycle) = explode(',', $restraintString);
$restraint = array((int) $current, (int) $always, (int) $start, (int) $increment, (int) $min, (int) $max, (int) $cycle);
} elseif ($type === Types::ENUM && preg_match_all("/'(.*?(?<!\\\\))'/", $restraintString, $enumMatches) !== false) {
$restraint = $enumMatches[1];
} else {
$restraint = array();
}
$this->columns[$name] = array('type' => $type, 'auto' => $auto, 'default' => $default, 'key' => $matches[6], 'null' => $null, 'restraint' => $restraint);
} else {
$this->columnsFile->releaseRead();
$this->columnsLockFile->releaseRead();
return false;
}
}
$this->columnsFile->releaseRead();
}
$this->columnsLockFile->releaseRead();
return parent::getColumns();
}
