public function IP2Location::__construct in Smart IP 6

Same name and namespace in other branches

1. 7 includes/IP2Location.inc \IP2Location::__construct()

File

includes/IP2Location.inc, line 101

Class

IP2Location

Code

public function __construct($file = NULL, $mode = self::FILE_IO) {
  if (!is_file($file)) {
    throw new PEAR_Exception('Unable to open file "' . $file . '".');
  }

  // Define system unpack method
  list($test) = array_values(unpack('L1L', pack('V', 1)));

  // Use Big Endian Unpack if endian test failed
  $this->unpack = $test != 1 ? self::BIG_ENDIAN : self::ENDIAN;
  switch ($mode) {
    case self::SHARED_MEMORY:
      if (!function_exists('shmop_open')) {
        throw new PEAR_Exception('Please make sure your PHP setup has "php_shmop" enabled.');
      }
      $this->mode = self::SHARED_MEMORY;
      $this->shmId = @shmop_open(self::SHM_KEY, 'a', 0, 0);

      /*shmop_delete($this->shmId);
      		shmop_close($this->shmId);
      		die;*/
      if ($this->shmId === FALSE) {

        // First execution, load database into memory
        if (($fp = fopen($file, 'rb')) === FALSE) {
          throw new PEAR_Exception('Unable to open file "' . $file . '".');
        }
        $stats = fstat($fp);
        if ($shmId = @shmop_open(self::SHM_KEY, 'w', 0, 0)) {
          shmop_delete($shmId);
          shmop_close($shmId);
        }
        if ($shmId = @shmop_open(self::SHM_KEY, 'c', 0644, $stats['size'])) {

          /*$buf = fread($fp, $stats['size']);
          		shmop_write($shmId, $buf, 0);*/
          $offset = 0;
          while ($offset < $stats['size']) {
            $buf = fread($fp, 524288);
            shmop_write($shmId, $buf, $offset);
            $offset += 524288;
          }
          shmop_close($shmId);
        }
        fclose($fp);
        $this->shmId = @shmop_open(self::SHM_KEY, 'a', 0, 0);
        if ($this->shmId === FALSE) {
          throw new PEAR_Exception('Unable to access shared memory block.');
        }
      }
      break;
    default:
      $this->mode = self::FILE_IO;
      $this->handle = fopen($file, 'rb');
      if ($mode == self::MEMORY_CACHE) {
        $this->mode = self::MEMORY_CACHE;
        $stats = fstat($this->handle);
        $this->buffer = fread($this->handle, $stats['size']);
      }
  }
  $this->db['type'] = $this
    ->readByte(1, '8');
  $this->db['column'] = $this
    ->readByte(2, '8');
  $this->db['year'] = $this
    ->readByte(3, '8');
  $this->db['month'] = $this
    ->readByte(4, '8');
  $this->db['day'] = $this
    ->readByte(5, '8');
  $this->db['count'] = $this
    ->readByte(6, '32');
  $this->db['base_address'] = $this
    ->readByte(10, '32');
  $this->db['ip_version'] = $this
    ->readByte(14, '32');
}