Determine the available math library GMP vs. BCMath, favouring GMP for performance.

File

drupal-7.x/modules/openid/openid.inc, line 714

OpenID utility functions.

Code

function _openid_get_math_library() {
  // Not drupal_static(), because a function is not going to disappear and
  // change the output of this under any circumstances.
  static $library;

  if (empty($library)) {
    if (function_exists('gmp_add')) {
      $library = 'gmp';
    }
    elseif (function_exists('bcadd')) {
      $library = 'bcmath';
    }
  }

  return $library;
}