hack.c

早期freebsd实现

/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/* hack.c - version 1.0.3 */

#include "hack.h"
#include <stdio.h>

extern char news0();
extern char *nomovemsg;
extern char *exclam();
extern struct obj *addinv();
extern boolean hmon();

/* called on movement:
	1. when throwing ball+chain far away
	2. when teleporting
	3. when walking out of a lit room
 */
unsee() {
	register x,y;
	register struct rm *lev;

/*
	if(u.udispl){
		u.udispl = 0;
		newsym(u.udisx, u.udisy);
	}
*/
#ifndef QUEST
	if(seehx){
		seehx = 0;
	} else
#endif QUEST
	for(x = u.ux-1; x < u.ux+2; x++)
	  for(y = u.uy-1; y < u.uy+2; y++) {
		if(!isok(x, y)) continue;
		lev = &levl[x][y];
		if(!lev->lit && lev->scrsym == '.') {
			lev->scrsym =' ';
			lev->new = 1;
			on_scr(x,y);
		}
	}
}

/* called:
	in hack.eat.c: seeoff(0) - blind after eating rotten food
	in hack.mon.c: seeoff(0) - blinded by a yellow light
	in hack.mon.c: seeoff(1) - swallowed
	in hack.do.c:  seeoff(0) - blind after drinking potion
	in hack.do.c:  seeoff(1) - go up or down the stairs
	in hack.trap.c:seeoff(1) - fall through trapdoor
 */
seeoff(mode)	/* 1 to redo @, 0 to leave them */
{	/* 1 means misc movement, 0 means blindness */
	register x,y;
	register struct rm *lev;

	if(u.udispl && mode){
		u.udispl = 0;
		levl[u.udisx][u.udisy].scrsym = news0(u.udisx,u.udisy);
	}
#ifndef QUEST
	if(seehx) {
		seehx = 0;
	} else
#endif QUEST
	if(!mode) {
		for(x = u.ux-1; x < u.ux+2; x++)
			for(y = u.uy-1; y < u.uy+2; y++) {
				if(!isok(x, y)) continue;
				lev = &levl[x][y];
				if(!lev->lit && lev->scrsym == '.')
					lev->seen = 0;
			}
	}
}

domove()
{
	xchar oldx,oldy;
	register struct monst *mtmp;
	register struct rm *tmpr,*ust;
	struct trap *trap;
	register struct obj *otmp;

	u_wipe_engr(rnd(5));

	if(inv_weight() > 0){
		pline("You collapse under your load.");
		nomul(0);
		return;
	}
	if(u.uswallow) {
		u.dx = u.dy = 0;
		u.ux = u.ustuck->mx;
		u.uy = u.ustuck->my;
	} else {
		if(Confusion) {
			do {
				confdir();
			} while(!isok(u.ux+u.dx, u.uy+u.dy) ||
			    IS_ROCK(levl[u.ux+u.dx][u.uy+u.dy].typ));
		}
		if(!isok(u.ux+u.dx, u.uy+u.dy)){
			nomul(0);
			return;
		}
	}

	ust = &levl[u.ux][u.uy];
	oldx = u.ux;
	oldy = u.uy;
	if(!u.uswallow && (trap = t_at(u.ux+u.dx, u.uy+u.dy)) && trap->tseen)
		nomul(0);
	if(u.ustuck && !u.uswallow && (u.ux+u.dx != u.ustuck->mx ||
		u.uy+u.dy != u.ustuck->my)) {
		if(dist(u.ustuck->mx, u.ustuck->my) > 2){
			/* perhaps it fled (or was teleported or ... ) */
			u.ustuck = 0;
		} else {
			if(Blind) pline("You cannot escape from it!");
			else pline("You cannot escape from %s!",
				monnam(u.ustuck));
			nomul(0);
			return;
		}
	}
	if(u.uswallow || (mtmp = m_at(u.ux+u.dx,u.uy+u.dy))) {
	/* attack monster */

		nomul(0);
		gethungry();
		if(multi < 0) return;	/* we just fainted */

		/* try to attack; note that it might evade */
		if(attack(u.uswallow ? u.ustuck : mtmp))
			return;
	}
	/* not attacking an animal, so we try to move */
	if(u.utrap) {
		if(u.utraptype == TT_PIT) {
			pline("You are still in a pit.");
			u.utrap--;
		} else {
			pline("You are caught in a beartrap.");
			if((u.dx && u.dy) || !rn2(5)) u.utrap--;
		}
		return;
	}
	tmpr = &levl[u.ux+u.dx][u.uy+u.dy];
	if(IS_ROCK(tmpr->typ) ||
	   (u.dx && u.dy && (tmpr->typ == DOOR || ust->typ == DOOR))){
		flags.move = 0;
		nomul(0);
		return;
	}
	while(otmp = sobj_at(ENORMOUS_ROCK, u.ux+u.dx, u.uy+u.dy)) {
		register xchar rx = u.ux+2*u.dx, ry = u.uy+2*u.dy;
		register struct trap *ttmp;
		nomul(0);
		if(isok(rx,ry) && !IS_ROCK(levl[rx][ry].typ) &&
		    (levl[rx][ry].typ != DOOR || !(u.dx && u.dy)) &&
		    !sobj_at(ENORMOUS_ROCK, rx, ry)) {
			if(m_at(rx,ry)) {
			    pline("You hear a monster behind the rock.");
			    pline("Perhaps that's why you cannot move it.");
			    goto cannot_push;
			}
			if(ttmp = t_at(rx,ry))
			    switch(ttmp->ttyp) {
			    case PIT:
				pline("You push the rock into a pit!");
				deltrap(ttmp);
				delobj(otmp);
				pline("It completely fills the pit!");
				continue;
			    case TELEP_TRAP:
				pline("You push the rock and suddenly it disappears!");
				delobj(otmp);
				continue;
			    }
			if(levl[rx][ry].typ == POOL) {
				levl[rx][ry].typ = ROOM;
				mnewsym(rx,ry);
				prl(rx,ry);
				pline("You push the rock into the water.");
				pline("Now you can cross the water!");
				delobj(otmp);
				continue;
			}
			otmp->ox = rx;
			otmp->oy = ry;
			/* pobj(otmp); */
			if(cansee(rx,ry)) atl(rx,ry,otmp->olet);
			if(Invisible) newsym(u.ux+u.dx, u.uy+u.dy);

			{ static long lastmovetime;
			/* note: this var contains garbage initially and
			   after a restore */
			if(moves > lastmovetime+2 || moves < lastmovetime)
			pline("With great effort you move the enormous rock.");
			lastmovetime = moves;
			}
		} else {
		    pline("You try to move the enormous rock, but in vain.");
	    cannot_push:
		    if((!invent || inv_weight()+90 <= 0) &&
			(!u.dx || !u.dy || (IS_ROCK(levl[u.ux][u.uy+u.dy].typ)
					&& IS_ROCK(levl[u.ux+u.dx][u.uy].typ)))){
			pline("However, you can squeeze yourself into a small opening.");
			break;
		    } else
			return;
		}
	    }
	if(u.dx && u.dy && IS_ROCK(levl[u.ux][u.uy+u.dy].typ) &&
		IS_ROCK(levl[u.ux+u.dx][u.uy].typ) &&
		invent && inv_weight()+40 > 0) {
		pline("You are carrying too much to get through.");
		nomul(0);
		return;
	}
	if(Punished &&
	   DIST(u.ux+u.dx, u.uy+u.dy, uchain->ox, uchain->oy) > 2){
		if(carried(uball)) {
			movobj(uchain, u.ux, u.uy);
			goto nodrag;
		}

		if(DIST(u.ux+u.dx, u.uy+u.dy, uball->ox, uball->oy) < 3){
			/* leave ball, move chain under/over ball */
			movobj(uchain, uball->ox, uball->oy);
			goto nodrag;
		}

		if(inv_weight() + (int) uball->owt/2 > 0) {
			pline("You cannot %sdrag the heavy iron ball.",
			invent ? "carry all that and also " : "");
			nomul(0);
			return;
		}

		movobj(uball, uchain->ox, uchain->oy);
		unpobj(uball);		/* BAH %% */
		uchain->ox = u.ux;
		uchain->oy = u.uy;
		nomul(-2);
		nomovemsg = "";
	nodrag:	;
	}
	u.ux += u.dx;
	u.uy += u.dy;
	if(flags.run) {
		if(tmpr->typ == DOOR ||
		(xupstair == u.ux && yupstair == u.uy) ||
		(xdnstair == u.ux && ydnstair == u.uy))
			nomul(0);
	}

	if(tmpr->typ == POOL && !Levitation)
		drown();	/* not necessarily fatal */

/*
	if(u.udispl) {
		u.udispl = 0;
		newsym(oldx,oldy);
	}
*/
	if(!Blind) {
#ifdef QUEST
		setsee();
#else
		if(ust->lit) {
			if(tmpr->lit) {
				if(tmpr->typ == DOOR)
					prl1(u.ux+u.dx,u.uy+u.dy);
				else if(ust->typ == DOOR)
					nose1(oldx-u.dx,oldy-u.dy);
			} else {
				unsee();
				prl1(u.ux+u.dx,u.uy+u.dy);
			}
		} else {
			if(tmpr->lit) setsee();
			else {
				prl1(u.ux+u.dx,u.uy+u.dy);
				if(tmpr->typ == DOOR) {
					if(u.dy) {
						prl(u.ux-1,u.uy);
						prl(u.ux+1,u.uy);
					} else {
						prl(u.ux,u.uy-1);
						prl(u.ux,u.uy+1);
					}
				}
			}
			nose1(oldx-u.dx,oldy-u.dy);
		}
#endif QUEST
	} else {
		pru();
	}
	if(!flags.nopick) pickup(1);
	if(trap) dotrap(trap);		/* fall into pit, arrow trap, etc. */
	(void) inshop();
	if(!Blind) read_engr_at(u.ux,u.uy);
}

movobj(obj, ox, oy)
register struct obj *obj;
register int ox, oy;
{
	/* Some dirty programming to get display right */
	freeobj(obj);
	unpobj(obj);
	obj->nobj = fobj;
	fobj = obj;
	obj->ox = ox;
	obj->oy = oy;
}

dopickup(){
	if(!g_at(u.ux,u.uy) && !o_at(u.ux,u.uy)) {
		pline("There is nothing here to pick up.");
		return(0);
	}
	if(Levitation) {
		pline("You cannot reach the floor.");
		return(1);
	}
	pickup(0);
	return(1);
}

pickup(all)
{
	register struct gold *gold;
	register struct obj *obj, *obj2;
	register int wt;

	if(Levitation) return;
	while(gold = g_at(u.ux,u.uy)) {
		pline("%ld gold piece%s.", gold->amount, plur(gold->amount));
		u.ugold += gold->amount;
		flags.botl = 1;
		freegold(gold);
		if(flags.run) nomul(0);
		if(Invisible) newsym(u.ux,u.uy);
	}

	/* check for more than one object */
	if(!all) {
		register int ct = 0;

		for(obj = fobj; obj; obj = obj->nobj)
			if(obj->ox == u.ux && obj->oy == u.uy)
				if(!Punished || obj != uchain)
					ct++;
		if(ct < 2)
			all++;
		else
			pline("There are several objects here.");
	}

	for(obj = fobj; obj; obj = obj2) {
	    obj2 = obj->nobj;	/* perhaps obj will be picked up */
	    if(obj->ox == u.ux && obj->oy == u.uy) {
		if(flags.run) nomul(0);

		/* do not pick up uchain */
		if(Punished && obj == uchain)
			continue;

		if(!all) {
			char c;

			pline("Pick up %s ? [ynaq]", doname(obj));
			while(!index("ynaq ", (c = readchar())))
				bell();
			if(c == 'q') return;
			if(c == 'n') continue;
			if(c == 'a') all = 1;
		}

		if(obj->otyp == DEAD_COCKATRICE && !uarmg){
		    pline("Touching the dead cockatrice is a fatal mistake.");
		    pline("You turn to stone.");
		    killer = "cockatrice cadaver";
		    done("died");
		}

		if(obj->otyp == SCR_SCARE_MONSTER){
		  if(!obj->spe) obj->spe = 1;
		  else {
		    /* Note: perhaps the 1st pickup failed: you cannot
			carry anymore, and so we never dropped it -
			let's assume that treading on it twice also
			destroys the scroll */
		    pline("The scroll turns to dust as you pick it up.");
		    delobj(obj);