al_fread - Allegro 5 API

       Read `size' bytes into the buffer pointed to by `ptr', from the given file.

       Returns the number of bytes actually read.  If an error occurs, or the end-of-file is reached, the return
       value is a short byte count (or zero).

       al_fread()   does   not   distinguish   between   EOF   and   other  errors.   Use  al_feof(3alleg5)  and
       al_ferror(3alleg5) to determine which occurred.

       al_fread - Allegro 5 API

al_fgetc(3alleg5),       al_fread16be(3alleg5),       al_fread16le(3alleg5),       al_fread32be(3alleg5),
       al_fread32le(3alleg5)

Allegro reference manual                                                                       al_fread(3alleg5)

              #include <allegro5/allegro.h>

              size_t al_fread(ALLEGRO_FILE *f, void *ptr, size_t size)