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/*********************************************************************
harddriv.h
Interface to the CHD code
*********************************************************************/
#ifndef HARDDRIV_H
#define HARDDRIV_H
#include "harddisk.h"
/***************************************************************************
TYPE DEFINITIONS
***************************************************************************/
// ======================> harddisk_interface
struct harddisk_interface
{
device_image_load_func m_device_image_load;
device_image_unload_func m_device_image_unload;
const char * m_interface;
device_image_display_info_func m_device_displayinfo;
};
// ======================> harddisk_image_device
class harddisk_image_device : public device_t,
public harddisk_interface,
public device_image_interface
{
public:
// construction/destruction
harddisk_image_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
virtual ~harddisk_image_device();
// image-level overrides
virtual bool call_load();
virtual bool call_create(int create_format, option_resolution *create_args);
virtual void call_unload();
virtual void call_display_info() { if (m_device_displayinfo) m_device_displayinfo(*this); }
virtual bool call_softlist_load(char *swlist, char *swname, rom_entry *start_entry) { load_software_part_region(this, swlist, swname, start_entry ); return TRUE; }
virtual iodevice_t image_type() const { return IO_HARDDISK; }
virtual bool is_readable() const { return 1; }
virtual bool is_writeable() const { return 1; }
virtual bool is_creatable() const { return 0; }
virtual bool must_be_loaded() const { return 0; }
virtual bool is_reset_on_load() const { return 0; }
virtual const char *image_interface() const { return m_interface; }
virtual const char *file_extensions() const { return "chd,hd"; }
virtual const option_guide *create_option_guide() const;
// specific implementation
hard_disk_file *get_hard_disk_file() { return m_hard_disk_handle; }
chd_file *get_chd_file();
protected:
// device-level overrides
virtual void device_config_complete();
virtual void device_start();
virtual void device_stop();
int internal_load_hd();
chd_file *m_chd;
chd_file m_origchd; /* handle to the original CHD */
chd_file m_diffchd; /* handle to the diff CHD */
hard_disk_file *m_hard_disk_handle;
image_device_format m_format;
};
// device type definition
extern const device_type HARDDISK;
/***************************************************************************
DEVICE CONFIGURATION MACROS
***************************************************************************/
#define MCFG_HARDDISK_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, HARDDISK, 0)
#define MCFG_HARDDISK_CONFIG_ADD(_tag,_config) \
MCFG_DEVICE_ADD(_tag, HARDDISK, 0) \
MCFG_DEVICE_CONFIG(_config)
#endif /* HARDDRIV_H */
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