3 typedef size_t (arearw)(void *p, size_t _size, size_t _n, void *file);
4 typedef size_t (areaeof)(void *file);
5 typedef int (areaseek)(void *file, long offset, int whence);
6 typedef int (areaclose)(void *file);
8 int PicoStateFP(void *afile, int is_save,
9 arearw *read, arearw *write, areaeof *eof, areaseek *seek);