Source:NetHack 3.6.0/include/region.h

Below is the full text to region.h from the source code of NetHack 3.6.0. To link to a particular line, write [[Source:NetHack 3.6.0/include/region.h#line123]], for example.

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 /* NetHack 3.6	region.h	$NHDT-Date: 1432512779 2015/05/25 00:12:59 $  $NHDT-Branch: master $:$NHDT-Revision: 1.13 $ */
 /* Copyright (c) 1996 by Jean-Christophe Collet			  */
 /* NetHack may be freely redistributed.  See license for details. */
 
 #ifndef REGION_H
 #define REGION_H
 
 /* generic callback function */
 
 typedef boolean FDECL((*callback_proc), (genericptr_t, genericptr_t));
 
 /*
  * player_flags
  */
 #define REG_HERO_INSIDE 0x01
 #define REG_NOT_HEROS 0x02
 #define hero_inside(r) ((r)->player_flags & REG_HERO_INSIDE)
 #define heros_fault(r) (!((r)->player_flags & REG_NOT_HEROS))
 #define set_hero_inside(r) ((r)->player_flags |= REG_HERO_INSIDE)
 #define clear_hero_inside(r) ((r)->player_flags &= ~REG_HERO_INSIDE)
 #define set_heros_fault(r) ((r)->player_flags &= ~REG_NOT_HEROS)
 #define clear_heros_fault(r) ((r)->player_flags |= REG_NOT_HEROS)
 
 /*
  * Note: if you change the size/type of any of the fields below,
  *       or add any/remove any fields, you must update the
  *       bwrite() calls in save_regions(), and the
  *       mread() calls in rest_regions() in src/region.c
  *       to reflect the changes.
  */
 
 typedef struct {
     NhRect bounding_box;        /* Bounding box of the region */
     NhRect *rects;              /* Rectangles composing the region */
     short nrects;               /* Number of rectangles  */
     boolean attach_2_u;         /* Region attached to player ? */
     unsigned int attach_2_m;    /* Region attached to monster ? */
     /*struct obj *attach_2_o;*/ /* Region attached to object ? UNUSED YET */
     const char *enter_msg;      /* Message when entering */
     const char *leave_msg;      /* Message when leaving */
     long ttl;                   /* Time to live. -1 is forever */
     short expire_f;            /* Function to call when region's ttl expire */
     short can_enter_f;         /* Function to call to check whether the player
                                   can, or can not, enter the region */
     short enter_f;             /* Function to call when the player enters*/
     short can_leave_f;         /* Function to call to check whether the player
                                   can, or can not, leave the region */
     short leave_f;             /* Function to call when the player leaves */
     short inside_f;            /* Function to call every turn if player's
                                   inside */
     unsigned int player_flags; /* (see above) */
     unsigned int *monsters;    /* Monsters currently inside this region */
     short n_monst;             /* Number of monsters inside this region */
     short max_monst;           /* Maximum number of monsters that can be
                                   listed without having to grow the array */
 #define MONST_INC 5
 
     /* Should probably do the same thing about objects */
 
     boolean visible; /* Is the region visible ? */
     int glyph;       /* Which glyph to use if visible */
     anything arg;    /* Optional user argument (Ex: strength of
                         force field, damage of a fire zone, ...*/
 } NhRegion;
 
 #endif /* REGION_H */