#ifndef DISP_H
#define DISP_H

#include <stdbool.h>
#include <limits.h>

/* Available display types. */
#define DISP_CLI "cli"
#define DISP_RAY "ray"
#define DISP_TUI "tui"

/* Reserved return values for the read_input function. */
#ifndef NDEBUG
#  define DISP_RELOAD INT_MAX
#endif
#define DISP_QUIT (INT_MAX - 1)
#define DISP_ERR (INT_MAX - 2)

struct disp {
	void (*init)(void);
	void (*display_calc)(int, int);
	int  (*read_input)(void);
	void (*display_res)(bool, int);
	void (*destroy)(void);
#ifndef NDEBUG
	char *name;
	void *dl_handle;
	char *so_path;
	void *(*pre_reload)(void);
	void (*post_reload)(void *);
#endif
};

/* Get a display handler for the given display type. */
struct disp *get_disp(char *);
void destroy_disp(struct disp *);

#ifndef NDEBUG
void disp_reload(struct disp *);
#endif	/* NDEBUG */

#endif	/* DISP_H */