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#ifndef _RINGBUF_H_
#define _RINGBUF_H_
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
/* simple ring buffer */
typedef struct _ringbuf {
size_t n; /* allocd size */
size_t u; /* used space */
size_t i; /* input pos */
size_t o; /* output pos */
char d[]; /* C99 flexible array member */
} ringbuf;
ringbuf *ringbuf_new(size_t sz);
ringbuf *ringbuf_take(void *buf, size_t sz);
int ringbuf_put(ringbuf *r, const void *data, size_t len);
size_t ringbuf_get_pending_size(ringbuf *r);
size_t ringbuf_get_next_chunk(ringbuf *r, char **data);
size_t ringbuf_get_writable(ringbuf *r, char **data);
void ringbuf_wrote(ringbuf *r, size_t len);
void ringbuf_mark_consumed(ringbuf *r, size_t len);
void ringbuf_free(ringbuf *r);
void ringbuf_clear(ringbuf *r);
size_t ringbuf_get_freespace(ringbuf *r);
#endif /* _RINGBUF_H_ */
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