#include <stdint.h>
#include <stddef.h>

typedef struct p_stream_s p_stream_t;

struct p_stream_s {
    int (*read)(uint8_t *buf, size_t len, void **vptr, void *sptr);
    int (*write)(uint8_t *buf, size_t len, void **vptr, void *sptr);
    void **props;
};