file_size_ex - Returns the size of a file in bytes. Allegro game programming library.
#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(3alleg), file_time(3alleg), expackf(3alleg)