/* $Id: H:/drh/idioms/book/RCS/ring.doc,v 1.12 1997/02/21 19:49:24 drh Exp $ */
#ifndef RING_INCLUDED
#define RING_INCLUDED
#define T Ring_T
typedef struct T *T;
extern T Ring_new (void);
extern T Ring_ring(void *x, ...);
extern void Ring_free  (T *ring);
extern int  Ring_length(T  ring);
extern void *Ring_get(T ring, int i);
extern void *Ring_put(T ring, int i, void *x);
extern void *Ring_add(T ring, int pos, void *x);
extern void *Ring_addlo(T ring, void *x);
extern void *Ring_addhi(T ring, void *x);
extern void *Ring_remove(T ring, int i);
extern void *Ring_remlo(T ring);
extern void *Ring_remhi(T ring);
extern void Ring_rotate(T ring, int n);
#undef T
#endif