static void r_close (RSFD rfd);
static void r_delete (rset_control *ct);
static void r_rewind (RSFD rfd);
static int r_count (rset_control *ct);
static int r_read (RSFD rfd, void *buf);
static int r_write (RSFD rfd, const void *buf);
static void r_close (RSFD rfd);
static void r_delete (rset_control *ct);
static void r_rewind (RSFD rfd);
static int r_count (rset_control *ct);
static int r_read (RSFD rfd, void *buf);
static int r_write (RSFD rfd, const void *buf);