After a debugging session, I thought I would post this.
If asctime is called with NULL it will crash. Unfortunately, both localtime and gmtime can return NULL if the argument is an invalid value. Therefore both of:
can crash a program. Most of the samples mentioned with asctime do not check the return value of gmtime or localtime and are therefore unsafe.Code:asctime(gmtime(&mytime)); asctime(localtime(&mytime));
ctime on my compiler does not crash, however, according to the docs, ctime is equivalent to asctime(localtime(&timer)); so it may also crash with some compilers.
Hopefully this can help someone.