Source:NetHack 3.6.0/include/dgn file.h

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 /* NetHack 3.6	dgn_file.h	$NHDT-Date: 1432512780 2015/05/25 00:13:00 $  $NHDT-Branch: master $:$NHDT-Revision: 1.8 $ */
 /* Copyright (c) 1989 by M. Stephenson				  */
 /* NetHack may be freely redistributed.  See license for details. */
 
 #ifndef DGN_FILE_H
 #define DGN_FILE_H
 
 #ifndef ALIGN_H
 #include "align.h"
 #endif
 
 /*
  * Structures manipulated by the dungeon loader & compiler
  */
 
 struct couple {
     short base, rand;
 };
 
 struct tmpdungeon {
     char name[24], protoname[24];
     struct couple lev;
     int flags, chance, levels, branches,
         entry_lev; /* entry level for this dungeon */
     char boneschar;
 };
 
 struct tmplevel {
     char name[24];
     struct couple lev;
     int chance, rndlevs, chain, flags;
     char boneschar;
 };
 
 struct tmpbranch {
     char name[24]; /* destination dungeon name */
     struct couple lev;
     int chain; /* index into tmplevel array (chained branch)*/
     int type;  /* branch type (see below) */
     int up;    /* branch is up or down */
 };
 
 /*
  *	Values for type for tmpbranch structure.
  */
 #define TBR_STAIR 0   /* connection with both ends having a staircase */
 #define TBR_NO_UP 1   /* connection with no up staircase */
 #define TBR_NO_DOWN 2 /* connection with no down staircase */
 #define TBR_PORTAL 3  /* portal connection */
 
 /*
  *	Flags that map into the dungeon flags bitfields.
  */
 #define TOWN 1 /* levels only */
 #define HELLISH 2
 #define MAZELIKE 4
 #define ROGUELIKE 8
 
 #define D_ALIGN_NONE 0
 #define D_ALIGN_CHAOTIC (AM_CHAOTIC << 4)
 #define D_ALIGN_NEUTRAL (AM_NEUTRAL << 4)
 #define D_ALIGN_LAWFUL (AM_LAWFUL << 4)
 
 #define D_ALIGN_MASK 0x70
 
 /*
  *	Max number of prototype levels and branches.
  */
 #define LEV_LIMIT 50
 #define BRANCH_LIMIT 32
 
 #endif /* DGN_FILE_H */