#ifndef EXTERN
#define EXTERN extern
#endif

#include <signal.h>
#include <setjmp.h>
#include <string.h>

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include <X11/keysym.h>

#ifndef NULL
#define NULL		0L
#endif

#define sgn(x)		((x) ? (((x) > 0) ? 1 : -1) : 0)
#define abs(x)		(((x) < 0) ? -(x) : (x))


/*-- MACHINE DEPENDENCIES ----------------------------------------------------*/

#ifdef VMS
EXTERN float		vms_delay;
#define random()	(rand() >> 16)
#define usleep(x)	{ vms_delay = (x) * 0.000001; lib$wait(&vms_delay); }
#endif

#ifdef ULTRIX
#include <sys/time.h>
EXTERN struct timeval	st_delay;
#define usleep(x)	{ st_delay.tv_usec = (x); st_delay.tv_sec = 0; \
			  select(32, NULL, NULL, NULL, &st_delay); }
#endif

#ifdef stellar
#include <sys/time.h>
EXTERN struct timeval	st_delay;
#define usleep(x)	{ st_delay.tv_usec = (x); st_delay.tv_sec = 0; \
			  select(32, NULL, NULL, NULL, &st_delay); }
#endif

/*----------------------------------------------------------------------------*/


#define GHOST_SIZE	16

#define BLOCK_WIDTH	21
#define BLOCK_HEIGHT	16

#define WIN_WIDTH	GHOST_SIZE * BLOCK_WIDTH
#define WIN_HEIGHT	GHOST_SIZE * BLOCK_HEIGHT

#define FRUIT_WIDTH	20
#define FRUIT_HEIGHT	16

#define ICON_WIDTH	32
#define ICON_HEIGHT	32

#define MAX_GHOSTS	4
#define MAX_POWER_DOTS	4

#define CREDIT_WIDTH	195
#define CREDIT_HEIGHT	22

#define DEMOBOX_WIDTH	81
#define DEMOBOX_HEIGHT	49

#define TITLE_WIDTH	80
#define TITLE_HEIGHT	16

typedef int		intm[8];
typedef char		charm[BLOCK_WIDTH];
typedef charm		mazedata[BLOCK_HEIGHT];
typedef int		(*funcptr)();

EXTERN Atom		DEC_icon_atom;

/* Xlib parameters */
EXTERN Display *	display;
EXTERN Window		root, window;
EXTERN int		screen, depth, black, white;
EXTERN Bool		normal;
EXTERN Font		font;
EXTERN int		ascent, descent;

/* graphics contexts */
EXTERN GC		copyGC, orGC, clearGC, invertGC;
EXTERN GC		powerGC, fullcopyGC, bitmapGC;

/* bitmaps */
EXTERN Pixmap		icon, map, save, powermap;
EXTERN Pixmap		demo_map[5], demo_mask[5], demo_back, demo_gray;
EXTERN Pixmap		credit, demobox, title, pause;
EXTERN Pixmap		bghost[16], eghost[16], fghost[16], gghost[16];
EXTERN Pixmap		lpac[16], rpac[16], upac[16], dpac[16];
EXTERN Pixmap		*pac, small_pac, maze[128];
EXTERN Pixmap		dead_prot[11], deadpac[11];
EXTERN Pixmap		eat_pix[4], fval_pix[14], fruit_pix[14];

/* regions */
EXTERN Region		fruit_region, power_region, full_region;
EXTERN Region		ghost_region[MAX_GHOSTS], pac_region, region[2];

/* position and direction variables */
EXTERN int		ghost_x[MAX_GHOSTS], ghost_y[MAX_GHOSTS];
EXTERN int		ghost_ix[MAX_GHOSTS], ghost_iy[MAX_GHOSTS];
EXTERN int		ghost_sx[MAX_GHOSTS], ghost_sy[MAX_GHOSTS];
EXTERN int		pac_x, pac_y, pac_ix, pac_iy, pac_sx, pac_sy;

/* additional ghost parameters */
EXTERN funcptr		drive[MAX_GHOSTS];
EXTERN funcptr		contact[MAX_GHOSTS];
EXTERN Pixmap		*ghost[MAX_GHOSTS];
EXTERN int		loops[MAX_GHOSTS];

/* fruit parameters */
EXTERN int		fruit_count, fruit_times, fruit_x, fruit_y;
EXTERN Bool		fruit_shown;

/* game parameters */
EXTERN int		level, plevel, lives;
EXTERN long		score, high_score;

/* miscellaneous variables */
EXTERN int		grey_tick, flash_tick, off_tick;
EXTERN int		count, count_sync, cr;
EXTERN Bool		eat_mode;
EXTERN int		door_x, door_y, eat_index;
EXTERN int		numdots, powerdots, num_ghosts;
EXTERN mazedata		md, dd;
EXTERN KeySym		last_key;
EXTERN Bool		dead, completed;

EXTERN jmp_buf		jb_start;

extern			follow(), hover(), hover2(), run(), go_home();
extern			die(), eat(), noop();
extern Bool		pause_seq();