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#ifndef RING_BUFFER_H
#define RING_BUFFER_H
#include <stdint.h>
#include <sys/types.h>
typedef struct t_ring_buffer {
char buffer[8192];
uint16_t off_r;
uint16_t off_w;
size_t size_filled;
} t_ring_buffer;
typedef t_ring_buffer t_rb;
static inline size_t rb_get_size(const t_rb *rb)
{
return sizeof(rb->buffer);
}
/*
* initializes rb with default values.
* returns 0 on success
*/
int rb_init(t_rb *rb);
/* returns an initialized newly allocated ring buffer */
__attribute((malloc)) t_rb *rb_new(void);
void rb_delete(t_rb **);
/* put n bytes of src into the ring buffer pointed by rb */
t_rb *rb_put(t_rb *rb, const void *src, size_t n);
/*
* take at most n bytes from the ring buffer pointed by rb and
* put them into dest
*/
size_t rb_get(t_rb *rb, void *dest, size_t n);
/*
* like rb_get but does not modify the ring_buffer (the bytes are kept
* in the ring_buffer)
*/
size_t rb_peek(const t_rb *ring_buffer, void *dest, size_t size);
/*
* remove a maximum of n bytes from the ring buffer pointed to by rb
* the functions returns the number of bytes actually removed
*/
static inline size_t rb_remove(t_rb *rb, size_t n)
{
return rb_get(rb, NULL, n);
}
#endif /* RING_BUFFER_H */
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