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#pragma once
#include <stddef.h>
#include <stdint.h>
typedef struct {
char *buf;
size_t capacity;
size_t _head, _tail;
} ring_t;
/** Returns amount of bytes stored in the buffer. */
size_t ring_used(ring_t*);
/** Returns amount of space left in the buffer. */
size_t ring_avail(ring_t*);
void ring_put(ring_t*, void*, size_t);
void ring_put1b(ring_t*, uint8_t);
size_t ring_get(ring_t*, void*, size_t);
/** Consumes up to `len` bytes, and returns a pointer to the buffer where it's stored.
* Not thread-safe. */
void* ring_contig(ring_t*, size_t *len);
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