al_fseek - Allegro 5 API

       Set  the  current  position  of the given file to a position relative to that specified by `whence', plus
       `offset' number of bytes.

       `whence' can be:

       • ALLEGRO_SEEK_SET - seek relative to beginning of file

       • ALLEGRO_SEEK_CUR - seek relative to current file position

       • ALLEGRO_SEEK_END - seek relative to end of file

       Returns true on success, false on failure.  errno is set to indicate the error.

       After a successful seek, the end-of-file indicator is cleared and all pushback bytes are forgotten.

       On some platforms this function may not support large files.

       al_fseek - Allegro 5 API

al_ftell(3alleg5), al_get_errno(3alleg5)

Allegro reference manual                                                                       al_fseek(3alleg5)

              #include <allegro5/allegro.h>

              bool al_fseek(ALLEGRO_FILE *f, int64_t offset, int whence)