file_size_ex - Man Page

#include <allegro.h>

uint64_t file_size_ex(const char *filename);

Returns the size of a file, in bytes. If the file does not exist or an  error occurs, it will return zero and store the system error code in  errno.

file_exists(3), file_time(3), expackf(3)

exists(3), expackf(3), file_exists(3), file_time(3).