Category : C Source Code
Archive   : HACKSRC.ZIP
Filename : DOG.C

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

#include "hack.h"
#include "mfndpos.h"
extern struct monst *makemon();
#include "edog.h"
#include "mkroom.h"

struct permonst li_dog =
{ "little dog", 'd',2,18,6,1,6,sizeof(struct edog) };
struct permonst dog =
{ "dog", 'd',4,16,5,1,6,sizeof(struct edog) };
struct permonst la_dog =
{ "large dog", 'd',6,15,4,2,4,sizeof(struct edog) };


makedog(){
register struct monst *mtmp = makemon(&li_dog,u.ux,u.uy);
if(!mtmp) return; /* dogs were genocided */
initedog(mtmp);
}

initedog(mtmp) register struct monst *mtmp; {
mtmp->mtame = mtmp->mpeaceful = 1;
EDOG(mtmp)->hungrytime = 1000 + moves;
EDOG(mtmp)->eattime = 0;
EDOG(mtmp)->droptime = 0;
EDOG(mtmp)->dropdist = 10000;
EDOG(mtmp)->apport = 10;
EDOG(mtmp)->whistletime = 0;
}

/* attach the monsters that went down (or up) together with @ */
struct monst *mydogs = 0;
struct monst *fallen_down = 0; /* monsters that fell through a trapdoor */
/* they will appear on the next level @ goes to, even if he goes up! */

losedogs(){
register struct monst *mtmp;
while(mtmp = mydogs){
mydogs = mtmp->nmon;
mtmp->nmon = fmon;
fmon = mtmp;
mnexto(mtmp);
}
while(mtmp = fallen_down){
fallen_down = mtmp->nmon;
mtmp->nmon = fmon;
fmon = mtmp;
rloc(mtmp);
}
}

keepdogs(){
register struct monst *mtmp;
for(mtmp = fmon; mtmp; mtmp = mtmp->nmon)
if(dist(mtmp->mx,mtmp->my) < 3 && follower(mtmp)
&& !mtmp->msleep && !mtmp->mfroz) {
#ifdef DGK
/* Bug "fix" for worm changing levels collapsing dungeon
*/
if (mtmp->data->mlet == 'w') {
if (canseemon(mtmp) || (Blind && Telepat))
pline("The worm can't fit in stairwell!");
continue;
}
#endif
relmon(mtmp);
mtmp->nmon = mydogs;
mydogs = mtmp;
unpmon(mtmp);
keepdogs(); /* we destroyed the link, so use recursion */
return; /* (admittedly somewhat primitive) */
}
}

fall_down(mtmp) register struct monst *mtmp; {
relmon(mtmp);
mtmp->nmon = fallen_down;
fallen_down = mtmp;
unpmon(mtmp);
mtmp->mtame = 0;
}

/* return quality of food; the lower the better */
#define DOGFOOD 0
#define CADAVER 1
#define ACCFOOD 2
#define MANFOOD 3
#define APPORT 4
#define POISON 5
#define UNDEF 6
dogfood(obj) register struct obj *obj; {
switch(obj->olet) {
case FOOD_SYM:
return(
(obj->otyp == TRIPE_RATION) ? DOGFOOD :
(obj->otyp < CARROT) ? ACCFOOD :
(obj->otyp < CORPSE) ? MANFOOD :
(poisonous(obj) || obj->age + 50 <= moves ||
obj->otyp == DEAD_COCKATRICE)
? POISON : CADAVER
);
default:
if(!obj->cursed) return(APPORT);
/* fall into next case */
case BALL_SYM:
case CHAIN_SYM:
case ROCK_SYM:
return(UNDEF);
}
}

/* return 0 (no move), 1 (move) or 2 (dead) */
dog_move(mtmp, after) register struct monst *mtmp; {
#ifdef REGBUG
int nx,ny,omx,omy,appr,nearer,j;
#else
register int nx,ny,omx,omy,appr,nearer,j;
#endif /* REGBUG */
int udist,chi,i,whappr;
register struct monst *mtmp2;
register struct permonst *mdat = mtmp->data;
register struct edog *edog = EDOG(mtmp);
struct obj *obj;
struct trap *trap;
xchar cnt,chcnt,nix,niy;
schar dogroom,uroom;
xchar gx,gy,gtyp,otyp; /* current goal */
coord poss[9];
int info[9];
#define GDIST(x,y) ((x-gx)*(x-gx) + (y-gy)*(y-gy))
#define DDIST(x,y) ((x-omx)*(x-omx) + (y-omy)*(y-omy))

if(moves <= edog->eattime) return(0); /* dog is still eating */
omx = mtmp->mx;
omy = mtmp->my;
whappr = (moves - EDOG(mtmp)->whistletime < 5);
if(moves > edog->hungrytime + 500 && !mtmp->mconf){
mtmp->mconf = 1;
mtmp->mhpmax /= 3;
if(mtmp->mhp > mtmp->mhpmax)
mtmp->mhp = mtmp->mhpmax;
if(cansee(omx,omy))
pline("%s is confused from hunger.", Monnam(mtmp));
else pline("You feel worried about %s.", monnam(mtmp));
} else
if(moves > edog->hungrytime + 750 || mtmp->mhp < 1){
if(cansee(omx,omy))
pline("%s dies from hunger.", Monnam(mtmp));
else
pline("You have a sad feeling for a moment, then it passes.");
mondied(mtmp);
return(2);
}
dogroom = inroom(omx,omy);
uroom = inroom(u.ux,u.uy);
udist = dist(omx,omy);

/* maybe we tamed him while being swallowed --jgm */
if(!udist) return(0);

/* if we are carrying sth then we drop it (perhaps near @) */
/* Note: if apport == 1 then our behaviour is independent of udist */
if(mtmp->minvent){
if(!rn2(udist) || !rn2((int) edog->apport))
if(rn2(10) < edog->apport){
relobj(mtmp, (int) mtmp->minvis);
if(edog->apport > 1) edog->apport--;
edog->dropdist = udist; /* hpscdi!jon */
edog->droptime = moves;
}
} else {
if(obj = o_at(omx,omy)) if(!index("0_", obj->olet)){
if((otyp = dogfood(obj)) <= CADAVER){
nix = omx;
niy = omy;
goto eatobj;
}
if(obj->owt < 10*mtmp->data->mlevel)
if(rn2(20) < edog->apport+3)
if(rn2(udist) || !rn2((int) edog->apport)){
freeobj(obj);
unpobj(obj);
/* if(levl[omx][omy].scrsym == obj->olet)
newsym(omx,omy); */
mpickobj(mtmp,obj);
}
}
}

/* first we look for food */
gtyp = UNDEF; /* no goal as yet */
#ifdef LINT
gx = gy = 0; /* suppress 'used before set' message */
#endif /* LINT /**/
for(obj = fobj; obj; obj = obj->nobj) {
otyp = dogfood(obj);
if(otyp > gtyp || otyp == UNDEF) continue;
if(inroom(obj->ox,obj->oy) != dogroom) continue;
if(otyp < MANFOOD &&
(dogroom >= 0 || DDIST(obj->ox,obj->oy) < 10)) {
if(otyp < gtyp || (otyp == gtyp &&
DDIST(obj->ox,obj->oy) < DDIST(gx,gy))){
gx = obj->ox;
gy = obj->oy;
gtyp = otyp;
}
} else
if(gtyp == UNDEF && dogroom >= 0 &&
uroom == dogroom &&
!mtmp->minvent && edog->apport > rn2(8)){
gx = obj->ox;
gy = obj->oy;
gtyp = APPORT;
}
}
if(gtyp == UNDEF ||
(gtyp != DOGFOOD && gtyp != APPORT && moves < edog->hungrytime)){
if(dogroom < 0 || dogroom == uroom){
gx = u.ux;
gy = u.uy;
#ifndef QUEST
} else {
int tmp = rooms[dogroom].fdoor;
cnt = rooms[dogroom].doorct;

gx = gy = FAR; /* random, far away */
while(cnt--){
if(dist(gx,gy) >
dist(doors[tmp].x, doors[tmp].y)){
gx = doors[tmp].x;
gy = doors[tmp].y;
}
tmp++;
}
/* here gx == FAR e.g. when dog is in a vault */
if(gx == FAR || (gx == omx && gy == omy)){
gx = u.ux;
gy = u.uy;
}
#endif /* QUEST /**/
}
appr = (udist >= 9) ? 1 : (mtmp->mflee) ? -1 : 0;
if(after && udist <= 4 && gx == u.ux && gy == u.uy)
return(0);
if(udist > 1){
if(!IS_ROOM(levl[u.ux][u.uy].typ) || !rn2(4) ||
whappr ||
(mtmp->minvent && rn2((int) edog->apport)))
appr = 1;
}
/* if you have dog food he'll follow you more closely */
if(appr == 0){
obj = invent;
while(obj){
if(obj->otyp == TRIPE_RATION){
appr = 1;
break;
}
obj = obj->nobj;
}
}
} else appr = 1; /* gtyp != UNDEF */
if(mtmp->mconf) appr = 0;

if(gx == u.ux && gy == u.uy && (dogroom != uroom || dogroom < 0)){
extern coord *gettrack();
register coord *cp;
cp = gettrack(omx,omy);
if(cp){
gx = cp->x;
gy = cp->y;
}
}

nix = omx;
niy = omy;
cnt = mfndpos(mtmp,poss,info,ALLOW_M | ALLOW_TRAPS);
chcnt = 0;
chi = -1;
for(i=0; i nx = poss[i].x;
ny = poss[i].y;
if(info[i] & ALLOW_M){
mtmp2 = m_at(nx,ny);
if(mtmp2->data->mlevel >= mdat->mlevel+2 ||
mtmp2->data->mlet == 'c')
continue;
if(after) return(0); /* hit only once each move */

if(hitmm(mtmp, mtmp2) == 1 && rn2(4) &&
mtmp2->mlstmv != moves &&
hitmm(mtmp2,mtmp) == 2) return(2);
return(0);
}

/* dog avoids traps */
/* but perhaps we have to pass a trap in order to follow @ */
if((info[i] & ALLOW_TRAPS) && (trap = t_at(nx,ny))){
if(!trap->tseen && rn2(40)) continue;
if(rn2(10)) continue;
}

/* dog eschewes cursed objects */
/* but likes dog food */
obj = fobj;
while(obj){
if(obj->ox != nx || obj->oy != ny)
goto nextobj;
if(obj->cursed) goto nxti;
if(obj->olet == FOOD_SYM &&
(otyp = dogfood(obj)) < MANFOOD &&
(otyp < ACCFOOD || edog->hungrytime <= moves)){
/* Note: our dog likes the food so much that he
might eat it even when it conceals a cursed object */
nix = nx;
niy = ny;
chi = i;
eatobj:
edog->eattime =
moves + obj->quan * objects[obj->otyp].oc_delay;
if(edog->hungrytime < moves)
edog->hungrytime = moves;
edog->hungrytime +=
5*obj->quan * objects[obj->otyp].nutrition;
mtmp->mconf = 0;
if(cansee(nix,niy))
pline("%s ate %s.", Monnam(mtmp), doname(obj));
/* perhaps this was a reward */
if(otyp != CADAVER)
edog->apport += 200/(edog->dropdist+moves-edog->droptime);
delobj(obj);
goto newdogpos;
}
nextobj:
obj = obj->nobj;
}

for(j=0; j if(nx == mtmp->mtrack[j].x && ny == mtmp->mtrack[j].y)
if(rn2(4*(cnt-j))) goto nxti;

/* Some stupid C compilers cannot compute the whole expression at once. */
nearer = GDIST(nx,ny);
nearer -= GDIST(nix,niy);
nearer *= appr;
if((nearer == 0 && !rn2(++chcnt)) || nearer<0 ||
(nearer > 0 && !whappr &&
((omx == nix && omy == niy && !rn2(3))
|| !rn2(12))
)){
nix = nx;
niy = ny;
if(nearer < 0) chcnt = 0;
chi = i;
}
nxti: ;
}
newdogpos:
if(nix != omx || niy != omy){
if(info[chi] & ALLOW_U){
(void) hitu(mtmp, d(mdat->damn, mdat->damd)+1);
return(0);
}
mtmp->mx = nix;
mtmp->my = niy;
for(j=MTSZ-1; j>0; j--) mtmp->mtrack[j] = mtmp->mtrack[j-1];
mtmp->mtrack[0].x = omx;
mtmp->mtrack[0].y = omy;
}
if(mintrap(mtmp) == 2) /* he died */
return(2);
pmon(mtmp);
return(1);
}

/* return roomnumber or -1 */
inroom(x,y) xchar x,y; {
#ifndef QUEST
register struct mkroom *croom = &rooms[0];
while(croom->hx >= 0){
if(croom->hx >= x-1 && croom->lx <= x+1 &&
croom->hy >= y-1 && croom->ly <= y+1)
return(croom - rooms);
croom++;
}
#endif /* QUEST /**/
return(-1); /* not in room or on door */
}

tamedog(mtmp, obj)
register struct monst *mtmp;
register struct obj *obj;
{
register struct monst *mtmp2;

if(flags.moonphase == FULL_MOON && night() && rn2(6))
return(0);

/* If we cannot tame him, at least he's no longer afraid. */
mtmp->mflee = 0;
mtmp->mfleetim = 0;
if(mtmp->mtame || mtmp->mfroz ||
#ifndef NOWORM
mtmp->wormno ||
#endif /* NOWORM /**/
mtmp->isshk || mtmp->isgd || index(" &@12", mtmp->data->mlet))
return(0); /* no tame long worms? */
if(obj) {
if(dogfood(obj) >= MANFOOD) return(0);
if(cansee(mtmp->mx,mtmp->my)){
pline("%s devours the %s.", Monnam(mtmp),
objects[obj->otyp].oc_name);
}
obfree(obj, (struct obj *) 0);
}
mtmp2 = newmonst(sizeof(struct edog) + mtmp->mnamelth);
*mtmp2 = *mtmp;
mtmp2->mxlth = sizeof(struct edog);
if(mtmp->mnamelth) (void) strcpy(NAME(mtmp2), NAME(mtmp));
initedog(mtmp2);
replmon(mtmp,mtmp2);
return(1);
}