#ifndef _LIBC_IO_RINGBUF_H_
#define _LIBC_IO_RINGBUF_H_

#include <stddef.h>

enum ringbuf_flags {
	RINGBUF_NONE = 0,
	RINGBUF_STATIC,
};

struct ringbuf {
	enum ringbuf_flags buf_flags;
	char *buf_ptr;
	size_t buf_max;

	size_t buf_readp, buf_writep;
};

extern int __libc_ringbuf_get_read_buffer(
	struct ringbuf *buf,
	const char **out_bufp,
	size_t *out_len);
extern void __libc_ringbuf_put_read_buffer(
	struct ringbuf *buf,
	const char **bufp,
	size_t *len);

extern int __libc_ringbuf_get_write_buffer(
	struct ringbuf *buf,
	char **out_bufp,
	size_t *out_len);
extern void __libc_ringbuf_put_write_buffer(
	struct ringbuf *buf,
	char **bufp,
	size_t *len);

extern long __libc_ringbuf_read(struct ringbuf *buf, void *p, size_t count);
extern long __libc_ringbuf_write(
	struct ringbuf *buf,
	const void *p,
	size_t count);

extern int __libc_ringbuf_clear(struct ringbuf *buf);
extern int __libc_ringbuf_resize(struct ringbuf *buf, size_t max);
extern int __libc_ringbuf_resize_static(
	struct ringbuf *buf,
	void *p,
	size_t max);

extern size_t __libc_ringbuf_available(const struct ringbuf *buf);
extern size_t __libc_ringbuf_capacity(const struct ringbuf *buf);

#endif