#include <stddef.h>
#include <stdlib.h>

#include "al.h"
#include "sio.h"

typedef struct {
    int dummy;
} private_t;

/*
 * create stage
 *
 * allocate private instance data
 */
static
sio_rc_t hole_init(sio_t *sio, void **up)
{
    private_t *my;
    
    my = (private_t *)malloc(sizeof(private_t));
    if (my == NULL)
        return SIO_ERR_MEM;

    *up = my;

    return SIO_OK;
}

/*
 * configure stage
 *
 * pass two void pointers
 */
static
sio_rc_t hole_configure(sio_t *sio, void *u, void *obj, void *val)
{
    return SIO_ERR_ARG;
}

/*
 * destroy stage
 */
static
sio_rc_t hole_cleanup(sio_t *sio, void *u)
{
    private_t *my = (private_t *)u;

    free(my);

    return SIO_OK;
}

static
sio_rc_t hole_openr(sio_t *sio, al_t *al, void *u)
{
    return SIO_OK;
}

static
sio_rc_t hole_closer(sio_t *sio, al_t *al, void *u)
{
    return SIO_OK;
}

static
sio_rc_t hole_openw(sio_t *sio, al_t *al, void *u)
{
    return SIO_OK;
}

static
sio_rc_t hole_closew(sio_t *sio, al_t *al, void *u)
{
    return SIO_OK;
}

static
sio_rc_t hole_input(sio_t *sio, al_t *al, void *u)
{
    /* drop all data into the bit bucket */
    al_splice(al, 0, al_bytes(al), NULL, NULL);

    return SIO_SCHED_DOWN;
}

static
sio_rc_t hole_output(sio_t *sio, al_t *al, void *u)
{
    /* drop all data into the bit bucket */
    al_splice(al, 0, al_bytes(al), NULL, NULL);

    return SIO_SCHED_DOWN;
}

sio_module_t sio_module_hole = {
    "hole",
    hole_init,
    hole_configure,
    hole_cleanup,
    hole_openr,
    hole_closer,
    hole_openw,
    hole_closew,
    hole_input,
    hole_output,
    NULL
};