+ const ALchar *errorString = alGetString(error);
+ if (errorString) {
+ msg.append(errorString);
+ } else {
+ // alGetString returns NULL when an unexpected or OS specific error
+ // occurs: e.g. -43 on Mac when file is not found.
+ // In this case, alGetString() sets 'Invalid Enum' error, so
+ // showing with the original error number is helpful.
+ stringstream ss;
+ ss << alGetString(alGetError()) << "(" << error << ")";
+ msg.append(ss.str());
+ }