/* NetHack 5.0 align.h $NHDT-Date: 1781973076 2026/06/20 16:31:16 $ $NHDT-Branch: NetHack-5.0 $:$NHDT-Revision: 1.24 $ */

/* Copyright (c) Mike Stephenson, Izchak Miller 1991. */

/* NetHack may be freely redistributed. See license for details. */

#ifndef ALIGN_H

#define ALIGN_H

typedef schar aligntyp; /* basic alignment type */

typedef struct align { /* alignment & record */

aligntyp type;

int record;

unsigned abuse;

} align;

/* bounds for "record" -- respect initial alignments of 10 */

#define ALIGNLIM (10L + (svm.moves / 200L))

#define A_NONE (-128) /* the value range of type */

#define A_CHAOTIC (-1)

#define A_NEUTRAL 0

#define A_LAWFUL 1

#define A_COALIGNED 1

#define A_OPALIGNED (-1)

/* align masks */

#define AM_NONE 0x00

#define AM_CHAOTIC 0x01

#define AM_NEUTRAL 0x02

#define AM_LAWFUL 0x04

#define AM_MASK 0x07 /* mask for "normal" alignment values */

/* Some altars are considered shrines, add a flag for that

for the altarmask field of struct rm. */

#define AM_SHRINE 0x08

/* High altar on Astral plane or Moloch's sanctum */

#define AM_SANCTUM 0x10

/* special level flags, gone by the time the level has been loaded */

#define AM_SPLEV_CO 0x20 /* co-aligned: force alignment to match hero's */

#define AM_SPLEV_NONCO 0x40 /* non-co-aligned: force alignment to not match */

#define AM_SPLEV_RANDOM 0x80

#define Amask2align(x) \

((aligntyp) ((((x) & AM_MASK) == 0) ? A_NONE \

: (((x) & AM_MASK) == AM_LAWFUL) ? A_LAWFUL \

: ((int) ((x) & AM_MASK)) - 2)) /* 2 => 0, 1 => -1 */

#define Align2amask(x) \

((unsigned) (((x) == A_NONE) ? AM_NONE \

: ((x) == A_LAWFUL) ? AM_LAWFUL \

: ((x) + 2))) /* -1 => 1, 0 => 2 */

/* Because clearly Nethack needs more ways to specify alignment...

Amask2msa(): 1, 2, 4 converted to 1, 2, 3 to fit within a width 2 bitfield;

Msa2amask(): 1, 2, 3 converted back to 1, 2, 4;

For Amask2msa(), 'x' might have the shrine bit set so strip that off. */

#define Amask2msa(x) ((((x) & AM_MASK) == 4) ? 3 : (x) & AM_MASK)

#define Msa2amask(x) (((x) == 3) ? 4 : (x))

#define MSA_NONE 0 /* unaligned or multiple alignments */

/* alignment change reasons for uchangealign(attrib.c) */

enum uchangealign_reasons {

A_CG_CONVERT = 0, /* permanently converted */

A_CG_HELM_ON = 1, /* donned helm of opposite alignment */

A_CG_HELM_OFF = 2, /* doffed helm of opposite alignment */

};

#endif /* ALIGN_H */