/*	SCCS Id: @(#)dungeon.h	3.4	1999/07/02	*/
/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/* NetHack may be freely redistributed.  See license for details. */

#ifndef DUNGEON_H
#define DUNGEON_H

typedef struct d_flags {	/* dungeon/level type flags */
	Bitfield(town, 1);	/* is this a town? (levels only) */
	Bitfield(hellish, 1);	/* is this part of hell? */
	Bitfield(maze_like, 1); /* is this a maze? */
	Bitfield(rogue_like, 1); /* is this an old-fashioned presentation? */
	Bitfield(align, 3);	/* dungeon alignment. */
	Bitfield(unused, 1);	/* etc... */
} d_flags;

typedef struct d_level {	/* basic dungeon level element */
	xchar	dnum;		/* dungeon number */
	xchar	dlevel;		/* level number */
} d_level;

typedef struct s_level {	/* special dungeon level element */
	struct	s_level *next;
	d_level dlevel;		/* dungeon & level numbers */
	char	proto[15];	/* name of prototype file (eg. "tower") */
	char	boneid;		/* character to id level in bones files */
	uchar	rndlevs;	/* no. of randomly available similar levels */
	d_flags flags;		/* type flags */
} s_level;

typedef struct stairway {	/* basic stairway identifier */
	xchar	sx, sy;		/* x / y location of the stair */
	d_level tolev;		/* where does it go */
	char	up;		/* what type of stairway (up/down) */
} stairway;

/* level region types */
#define LR_DOWNSTAIR 0
#define LR_UPSTAIR 1
#define LR_PORTAL 2
#define LR_BRANCH 3
#define LR_TELE 4
#define LR_UPTELE 5
#define LR_DOWNTELE 6

typedef struct dest_area {	/* non-stairway level change indentifier */
	xchar	lx, ly;		/* "lower" left corner (near [0,0]) */
	xchar	hx, hy;		/* "upper" right corner (near [COLNO,ROWNO]) */
	xchar	nlx, nly;	/* outline of invalid area */
	xchar	nhx, nhy;	/* opposite corner of invalid area */
} dest_area;

typedef struct dungeon {	/* basic dungeon identifier */
	char	dname[24];	/* name of the dungeon (eg. "Hell") */
	char	proto[15];	/* name of prototype file (eg. "tower") */
	char	boneid;		/* character to id dungeon in bones files */
	d_flags flags;		/* dungeon flags */
	xchar	entry_lev;	/* entry level */
	xchar	num_dunlevs;	/* number of levels in this dungeon */
	xchar	dunlev_ureached; /* how deep you have been in this dungeon */
	int	ledger_start,	/* the starting depth in "real" terms */
		depth_start;	/* the starting depth in "logical" terms */
} dungeon;

/*
 * A branch structure defines the connection between two dungeons.  They
 * will be ordered by the dungeon number/level number of 'end1'.  Ties
 * are resolved by 'end2'.  'Type' uses 'end1' arbitrarily as the primary
 * point.
 */
typedef struct branch {
    struct branch *next;	/* next in the branch chain */
    int		  id;		/* branch identifier */
    int		  type;		/* type of branch */
    d_level	  end1;		/* "primary" end point */
    d_level	  end2;		/* other end point */
    boolean	  end1_up;	/* does end1 go up? */
} branch;

/* branch types */
#define BR_STAIR   0	/* "Regular" connection, 2 staircases. */
#define BR_NO_END1 1	/* "Regular" connection.  However, no stair from  */
			/*	end1 to end2.  There is a stair from end2 */
			/*	to end1.				  */
#define BR_NO_END2 2	/* "Regular" connection.  However, no stair from  */
			/*	end2 to end1.  There is a stair from end1 */
			/*	to end2.				  */
#define BR_PORTAL  3	/* Connection by magic portals (traps) */


/* A particular dungeon contains num_dunlevs d_levels with dlevel 1..
 * num_dunlevs.  Ledger_start and depth_start are bases that are added
 * to the dlevel of a particular d_level to get the effective ledger_no
 * and depth for that d_level.
 *
 * Ledger_no is a bookkeeping number that gives a unique identifier for a
 * particular d_level (for level.?? files, e.g.).
 *
 * Depth corresponds to the number of floors below the surface.
 */
#define Is_astralevel(x)	(on_level(x, &astral_level))
#define Is_earthlevel(x)	(on_level(x, &earth_level))
#define Is_waterlevel(x)	(on_level(x, &water_level))
#define Is_firelevel(x)		(on_level(x, &fire_level))
#define Is_airlevel(x)		(on_level(x, &air_level))
#define Is_medusa_level(x)	(on_level(x, &medusa_level))
#define Is_oracle_level(x)	(on_level(x, &oracle_level))
#define Is_valley(x)		(on_level(x, &valley_level))
#define Is_asmo_level(x)	(on_level(x, &asmodeus_level))
#define Is_baal_level(x)	(on_level(x, &baalzebub_level))
#define Is_wiz1_level(x)	(on_level(x, &wiz1_level))
#define Is_wiz2_level(x)	(on_level(x, &wiz2_level))
#define Is_wiz3_level(x)	(on_level(x, &wiz3_level))
#define Is_sanctum(x)		(on_level(x, &sanctum_level))
#define Is_portal_level(x)	(on_level(x, &portal_level))
#define Is_rogue_level(x)	(on_level(x, &rogue_level))
#define Is_stronghold(x)	(on_level(x, &stronghold_level))
#define Is_bigroom(x)		(on_level(x, &bigroom_level))
#define Is_qstart(x)		(on_level(x, &qstart_level))
#define Is_qlocate(x)		(on_level(x, &qlocate_level))
#define Is_nemesis(x)		(on_level(x, &nemesis_level))
#define Is_knox(x)		(on_level(x, &knox_level))

#define In_sokoban(x)		((x)->dnum == sokoban_dnum)
#define Inhell			In_hell(&u.uz)	/* now gehennom */
#define In_endgame(x)		((x)->dnum == astral_level.dnum)

#define within_bounded_area(X,Y,LX,LY,HX,HY) \
		((X) >= (LX) && (X) <= (HX) && (Y) >= (LY) && (Y) <= (HY))

/* monster and object migration codes */

#define MIGR_NOWHERE	      (-1)	/* failure flag for down_gate() */
#define MIGR_RANDOM		0
#define MIGR_APPROX_XY		1	/* approximate coordinates */
#define MIGR_EXACT_XY		2	/* specific coordinates */
#define MIGR_STAIRS_UP		3
#define MIGR_STAIRS_DOWN	4
#define MIGR_LADDER_UP		5
#define MIGR_LADDER_DOWN	6
#define MIGR_SSTAIRS		7	/* dungeon branch */
#define MIGR_PORTAL		8	/* magic portal */
#define MIGR_NEAR_PLAYER	9	/* mon: followers; obj: trap door */

/* level information (saved via ledger number) */

struct linfo {
	unsigned char	flags;
#define VISITED		0x01	/* hero has visited this level */
#define FORGOTTEN	0x02	/* hero will forget this level when reached */
#define LFILE_EXISTS	0x04	/* a level file exists for this level */
/*
 * Note:  VISITED and LFILE_EXISTS are currently almost always set at the
 * same time.  However they _mean_ different things.
 */

#ifdef MFLOPPY
# define FROMPERM	 1	/* for ramdisk use */
# define TOPERM		 2	/* for ramdisk use */
# define ACTIVE		 1
# define SWAPPED	 2
	int	where;
	long	time;
	long	size;
#endif /* MFLOPPY */
};

#endif /* DUNGEON_H */
