#ifndef _AL_RING_BUFFER_H
#define _AL_RING_BUFFER_H

#include "types.h"

struct al_ring_buffer {
    u8 *start;
    u8 *end;
    u8 *read;
    u8 *write;
};

void al_ring_buffer_init(struct al_ring_buffer *buf, u8 *data, ptrdiff_t length);

ptrdiff_t al_ring_buffer_space(struct al_ring_buffer *buf);
u8 *al_ring_buffer_write_chunk(struct al_ring_buffer *buf, ptrdiff_t *size);
void al_ring_buffer_append(struct al_ring_buffer *buf, u8 *ptr, ptrdiff_t n);

ptrdiff_t al_ring_buffer_occupied(struct al_ring_buffer *buf);
u8 *al_ring_buffer_read_chunk(struct al_ring_buffer *buf, ptrdiff_t *size);
void al_ring_buffer_consume(struct al_ring_buffer *buf, u8 *ptr, ptrdiff_t n);

ptrdiff_t al_ring_buffer_write(struct al_ring_buffer *buf, u8 *data, ptrdiff_t n);
ptrdiff_t al_ring_buffer_read(struct al_ring_buffer *buf, u8 *ptr, ptrdiff_t n);
ptrdiff_t al_ring_buffer_peek(struct al_ring_buffer *buf, u8 *ptr, ptrdiff_t offset, ptrdiff_t n);
ptrdiff_t al_ring_buffer_discard(struct al_ring_buffer *buf, ptrdiff_t n);

void al_ring_buffer_reset(struct al_ring_buffer *buf);

#endif // _AL_RING_BUFFER_H