#include "ibm.h"
#include "ide.h"
#include "cdrom-ioctl.h"

int cdrom_drive;

static ATAPI null_atapi;

void cdrom_null_audio_callback(int16_t *output, int len) { memset(output, 0, len * 2); }

void cdrom_null_audio_stop() {}

static void null_playaudio(uint32_t pos, uint32_t len, int ismsf) {}

static void null_pause(void) {}

static void null_resume(void) {}

static void null_stop(void) {}

static void null_seek(uint32_t pos) {}

static int null_ready(void) { return 0; }

/* Always return 0, the contents of a null CD-ROM drive never change. */
static int null_medium_changed(void) { return 0; }

static uint8_t null_getcurrentsubchannel(uint8_t *b, int msf) { return 0x13; }

static void null_eject(void) {}

static void null_load(void) {}

static int null_readsector(uint8_t *b, int sector, int count) { return 0; }

static void null_readsector_raw(uint8_t *b, int sector) {}

static int null_readtoc(unsigned char *b, unsigned char starttrack, int msf, int maxlen, int single) { return 0; }

static int null_readtoc_session(unsigned char *b, int msf, int maxlen) { return 0; }

static int null_readtoc_raw(unsigned char *b, int maxlen) { return 0; }

static uint32_t null_size() { return 0; }

static int null_status() { return CD_STATUS_EMPTY; }

void cdrom_null_reset() {}

int cdrom_null_open(char d) {
        atapi = &null_atapi;
        return 0;
}

void null_close(void) {}

static void null_exit(void) {}

static int null_is_track_audio(uint32_t pos, int ismsf) { return 0; }

static ATAPI null_atapi = {null_ready,
                           null_medium_changed,
                           null_readtoc,
                           null_readtoc_session,
                           null_readtoc_raw,
                           null_getcurrentsubchannel,
                           null_readsector,
                           null_readsector_raw,
                           null_playaudio,
                           null_seek,
                           null_load,
                           null_eject,
                           null_pause,
                           null_resume,
                           null_size,
                           null_status,
                           null_is_track_audio,
                           null_stop,
                           null_exit};
