root/games/hack/hack.read.c
/*      $OpenBSD: hack.read.c,v 1.9 2016/01/09 18:33:15 mestre Exp $    */

/*
 * Copyright (c) 1985, Stichting Centrum voor Wiskunde en Informatica,
 * Amsterdam
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of the Stichting Centrum voor Wiskunde en
 * Informatica, nor the names of its contributors may be used to endorse or
 * promote products derived from this software without specific prior
 * written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Copyright (c) 1982 Jay Fenlason <hack@gnu.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdlib.h>

#include "hack.h"

static boolean monstersym(char);

int
doread(void)
{
        struct obj *scroll;
        boolean confused = (Confusion != 0);
        boolean known = FALSE;

        scroll = getobj("?", "read");
        if(!scroll) return(0);
        if(!scroll->dknown && Blind) {
            pline("Being blind, you cannot read the formula on the scroll.");
            return(0);
        }
        if(Blind)
          pline("As you pronounce the formula on it, the scroll disappears.");
        else
          pline("As you read the scroll, it disappears.");
        if(confused)
          pline("Being confused, you mispronounce the magic words ... ");

        switch(scroll->otyp) {
#ifdef MAIL
        case SCR_MAIL:
                readmail(/* scroll */);
                break;
#endif /* MAIL */
        case SCR_ENCHANT_ARMOR:
            {   struct obj *otmp = some_armor();
                if(!otmp) {
                        strange_feeling(scroll,"Your skin glows then fades.");
                        return(1);
                }
                if(confused) {
                        pline("Your %s glows silver for a moment.",
                                objects[otmp->otyp].oc_name);
                        otmp->rustfree = 1;
                        break;
                }
                if(otmp->spe > 3 && rn2(otmp->spe)) {
        pline("Your %s glows violently green for a while, then evaporates.",
                        objects[otmp->otyp].oc_name);
                        useup(otmp);
                        break;
                }
                pline("Your %s glows green for a moment.",
                        objects[otmp->otyp].oc_name);
                otmp->cursed = 0;
                otmp->spe++;
                break;
            }
        case SCR_DESTROY_ARMOR:
                if(confused) {
                        struct obj *otmp = some_armor();
                        if(!otmp) {
                                strange_feeling(scroll,"Your bones itch.");
                                return(1);
                        }
                        pline("Your %s glows purple for a moment.",
                                objects[otmp->otyp].oc_name);
                        otmp->rustfree = 0;
                        break;
                }
                if(uarm) {
                    pline("Your armor turns to dust and falls to the floor!");
                    useup(uarm);
                } else if(uarmh) {
                    pline("Your helmet turns to dust and is blown away!");
                    useup(uarmh);
                } else if(uarmg) {
                        pline("Your gloves vanish!");
                        useup(uarmg);
                        selftouch("You");
                } else {
                        strange_feeling(scroll,"Your skin itches.");
                        return(1);
                }
                break;
        case SCR_CONFUSE_MONSTER:
                if(confused) {
                        pline("Your hands begin to glow purple.");
                        Confusion += rnd(100);
                } else {
                        pline("Your hands begin to glow blue.");
                        u.umconf = 1;
                }
                break;
        case SCR_SCARE_MONSTER:
            {   int ct = 0;
                struct monst *mtmp;

                for(mtmp = fmon; mtmp; mtmp = mtmp->nmon)
                        if(cansee(mtmp->mx,mtmp->my)) {
                                if(confused)
                                        mtmp->mflee = mtmp->mfroz =
                                        mtmp->msleep = 0;
                                else
                                        mtmp->mflee = 1;
                                ct++;
                        }
                if(!ct) {
                    if(confused)
                        pline("You hear sad wailing in the distance.");
                    else
                        pline("You hear maniacal laughter in the distance.");
                }
                break;
            }
        case SCR_BLANK_PAPER:
                if(confused)
                    pline("You see strange patterns on this scroll.");
                else
                    pline("This scroll seems to be blank.");
                break;
        case SCR_REMOVE_CURSE:
            {   struct obj *obj;
                if(confused)
                  pline("You feel like you need some help.");
                else
                  pline("You feel like someone is helping you.");
                for(obj = invent; obj ; obj = obj->nobj)
                        if(obj->owornmask)
                                obj->cursed = confused;
                if(Punished && !confused) {
                        Punished = 0;
                        freeobj(uchain);
                        unpobj(uchain);
                        free(uchain);
                        uball->spe = 0;
                        uball->owornmask &= ~W_BALL;
                        uchain = uball = (struct obj *) 0;
                }
                break;
            }
        case SCR_CREATE_MONSTER:
            {   int cnt = 1;

                if(!rn2(73)) cnt += rnd(4);
                if(confused) cnt += 12;
                while(cnt--)
                    (void) makemon(confused ? PM_ACID_BLOB :
                        (struct permonst *) 0, u.ux, u.uy);
                break;
            }
        case SCR_ENCHANT_WEAPON:
                if(uwep && confused) {
                        pline("Your %s glows silver for a moment.",
                                objects[uwep->otyp].oc_name);
                        uwep->rustfree = 1;
                } else
                        if(!chwepon(scroll, 1))         /* tests for !uwep */
                                return(1);
                break;
        case SCR_DAMAGE_WEAPON:
                if(uwep && confused) {
                        pline("Your %s glows purple for a moment.",
                                objects[uwep->otyp].oc_name);
                        uwep->rustfree = 0;
                } else
                        if(!chwepon(scroll, -1))        /* tests for !uwep */
                                return(1);
                break;
        case SCR_TAMING:
            {   int i,j;
                int bd = confused ? 5 : 1;
                struct monst *mtmp;

                for(i = -bd; i <= bd; i++) for(j = -bd; j <= bd; j++)
                if ((mtmp = m_at(u.ux+i, u.uy+j)))
                        (void) tamedog(mtmp, NULL);
                break;
            }
        case SCR_GENOCIDE:
            {   extern char genocided[], fut_geno[];
                char buf[BUFSZ];
                struct monst *mtmp, *mtmp2;

                pline("You have found a scroll of genocide!");
                known = TRUE;
                if(confused)
                        *buf = u.usym;
                else do {
            pline("What monster do you want to genocide (Type the letter)? ");
                        getlin(buf);
                } while(strlen(buf) != 1 || !monstersym(*buf));
                if(!strchr(fut_geno, *buf))
                        charcat(fut_geno, *buf);
                if(!strchr(genocided, *buf))
                        charcat(genocided, *buf);
                else {
                        pline("Such monsters do not exist in this world.");
                        break;
                }
                for(mtmp = fmon; mtmp; mtmp = mtmp2){
                        mtmp2 = mtmp->nmon;
                        if(mtmp->data->mlet == *buf)
                                mondead(mtmp);
                }
                pline("Wiped out all %c's.", *buf);
                if(*buf == u.usym) {
                        killer = "scroll of genocide";
                        u.uhp = -1;
                }
                break;
                }
        case SCR_LIGHT:
                if(!Blind) known = TRUE;
                litroom(!confused);
                break;
        case SCR_TELEPORTATION:
                if(confused)
                        level_tele();
                else {
#ifdef QUEST
                        int oux = u.ux, ouy = u.uy;
                        tele();
                        if(dist(oux, ouy) > 100) known = TRUE;
#else /* QUEST */
                        int uroom = inroom(u.ux, u.uy);
                        tele();
                        if(uroom != inroom(u.ux, u.uy)) known = TRUE;
#endif /* QUEST */
                }
                break;
        case SCR_GOLD_DETECTION:
            /* Unfortunately this code has become slightly less elegant,
               now that gold and traps no longer are of the same type. */
            if(confused) {
                struct trap *ttmp;

                if(!ftrap) {
                        strange_feeling(scroll, "Your toes stop itching.");
                        return(1);
                } else {
                        for(ttmp = ftrap; ttmp; ttmp = ttmp->ntrap)
                                if(ttmp->tx != u.ux || ttmp->ty != u.uy)
                                        goto outtrapmap;
                        /* only under me - no separate display required */
                        pline("Your toes itch!");
                        break;
                outtrapmap:
                        cls();
                        for(ttmp = ftrap; ttmp; ttmp = ttmp->ntrap)
                                at(ttmp->tx, ttmp->ty, '$');
                        prme();
                        pline("You feel very greedy!");
                }
            } else {
                struct gold *gtmp;

                if(!fgold) {
                        strange_feeling(scroll, "You feel materially poor.");
                        return(1);
                } else {
                        known = TRUE;
                        for(gtmp = fgold; gtmp; gtmp = gtmp->ngold)
                                if(gtmp->gx != u.ux || gtmp->gy != u.uy)
                                        goto outgoldmap;
                        /* only under me - no separate display required */
                        pline("You notice some gold between your feet.");
                        break;
                outgoldmap:
                        cls();
                        for(gtmp = fgold; gtmp; gtmp = gtmp->ngold)
                                at(gtmp->gx, gtmp->gy, '$');
                        prme();
                        pline("You feel very greedy, and sense gold!");
                }
            }
                /* common sequel */
                more();
                docrt();
                break;
        case SCR_FOOD_DETECTION:
            {   int ct = 0, ctu = 0;
                struct obj *obj;
                char foodsym = confused ? POTION_SYM : FOOD_SYM;

                for(obj = fobj; obj; obj = obj->nobj)
                        if(obj->olet == FOOD_SYM) {
                                if(obj->ox == u.ux && obj->oy == u.uy) ctu++;
                                else ct++;
                        }
                if(!ct && !ctu) {
                        strange_feeling(scroll,"Your nose twitches.");
                        return(1);
                } else if(!ct) {
                        known = TRUE;
                        pline("You smell %s close nearby.",
                                confused ? "something" : "food");
                        
                } else {
                        known = TRUE;
                        cls();
                        for(obj = fobj; obj; obj = obj->nobj)
                            if(obj->olet == foodsym)
                                at(obj->ox, obj->oy, FOOD_SYM);
                        prme();
                        pline("Your nose tingles and you smell %s!",
                                confused ? "something" : "food");
                        more();
                        docrt();
                }
                break;
            }
        case SCR_IDENTIFY:
                /* known = TRUE; */
                if(confused)
                        pline("You identify this as an identify scroll.");
                else
                        pline("This is an identify scroll.");
                useup(scroll);
                objects[SCR_IDENTIFY].oc_name_known = 1;
                if(!confused)
                    while(
                        !ggetobj("identify", identify, rn2(5) ? 1 : rn2(5))
                        && invent
                    );
                return(1);
        case SCR_MAGIC_MAPPING:
            {   struct rm *lev;
                int num, zx, zy;

                known = TRUE;
                pline("On this scroll %s a map!",
                        confused ? "was" : "is");
                for(zy = 0; zy < ROWNO; zy++)
                        for(zx = 0; zx < COLNO; zx++) {
                                if(confused && rn2(7)) continue;
                                lev = &(levl[zx][zy]);
                                if((num = lev->typ) == 0)
                                        continue;
                                if(num == SCORR) {
                                        lev->typ = CORR;
                                        lev->scrsym = CORR_SYM;
                                } else
                                if(num == SDOOR) {
                                        lev->typ = DOOR;
                                        lev->scrsym = '+';
                                        /* do sth in doors ? */
                                } else if(lev->seen) continue;
#ifndef QUEST
                                if(num != ROOM)
#endif /* QUEST */
                                {
                                  lev->seen = lev->new = 1;
                                  if(lev->scrsym == ' ' || !lev->scrsym)
                                    newsym(zx,zy);
                                  else
                                    on_scr(zx,zy);
                                }
                        }
                break;
            }
        case SCR_AMNESIA:
            {   int zx, zy;

                known = TRUE;
                for(zx = 0; zx < COLNO; zx++) for(zy = 0; zy < ROWNO; zy++)
                    if(!confused || rn2(7))
                        if(!cansee(zx,zy))
                            levl[zx][zy].seen = 0;
                docrt();
                pline("Thinking of Maud you forget everything else.");
                break;
            }
        case SCR_FIRE:
            {   int num;
                struct monst *mtmp;

                known = TRUE;
                if(confused) {
                    pline("The scroll catches fire and you burn your hands.");
                    losehp(1, "scroll of fire");
                } else {
                    pline("The scroll erupts in a tower of flame!");
                    if(Fire_resistance)
                        pline("You are uninjured.");
                    else {
                        num = rnd(6);
                        u.uhpmax -= num;
                        losehp(num, "scroll of fire");
                    }
                }
                num = (2*num + 1)/3;
                for(mtmp = fmon; mtmp; mtmp = mtmp->nmon) {
                    if(dist(mtmp->mx,mtmp->my) < 3) {
                        mtmp->mhp -= num;
                        if(strchr("FY", mtmp->data->mlet))
                            mtmp->mhp -= 3*num; /* this might well kill 'F's */
                        if(mtmp->mhp < 1) {
                            killed(mtmp);
                            break;              /* primitive */
                        }
                    }
                }
                break;
            }
        case SCR_PUNISHMENT:
                known = TRUE;
                if(confused) {
                        pline("You feel guilty.");
                        break;
                }
                pline("You are being punished for your misbehaviour!");
                if(Punished){
                        pline("Your iron ball gets heavier.");
                        uball->owt += 15;
                        break;
                }
                Punished = INTRINSIC;
                setworn(mkobj_at(CHAIN_SYM, u.ux, u.uy), W_CHAIN);
                setworn(mkobj_at(BALL_SYM, u.ux, u.uy), W_BALL);
                uball->spe = 1;         /* special ball (see save) */
                break;
        default:
                impossible("What weird language is this written in? (%u)",
                        scroll->otyp);
        }
        if(!objects[scroll->otyp].oc_name_known) {
                if(known && !confused) {
                        objects[scroll->otyp].oc_name_known = 1;
                        more_experienced(0,10);
                } else if(!objects[scroll->otyp].oc_uname)
                        docall(scroll);
        }
        useup(scroll);
        return(1);
}

/* also called by newmail() */
int
identify(struct obj *otmp)
{
        objects[otmp->otyp].oc_name_known = 1;
        otmp->known = otmp->dknown = 1;
        prinv(otmp);
        return(1);
}

void
litroom(boolean on)
{
        int num,zx,zy;

        /* first produce the text (provided he is not blind) */
        if(Blind) goto do_it;
        if(!on) {
                if(u.uswallow || !xdnstair ||
                   levl[(int)u.ux][(int)u.uy].typ == CORR ||
                   !levl[(int)u.ux][(int)u.uy].lit) {
                        pline("It seems even darker in here than before.");
                        return;
                } else
                        pline("It suddenly becomes dark in here.");
        } else {
                if(u.uswallow){
                        pline("%s's stomach is lit.", Monnam(u.ustuck));
                        return;
                }
                if(!xdnstair){
                        pline("Nothing Happens.");
                        return;
                }
#ifdef QUEST
                pline("The cave lights up around you, then fades.");
                return;
#else /* QUEST */
                if (levl[(int)u.ux][(int)u.uy].typ == CORR) {
                    pline("The corridor lights up around you, then fades.");
                    return;
                } else if (levl[(int)u.ux][(int)u.uy].lit) {
                    pline("The light here seems better now.");
                    return;
                } else
                    pline("The room is lit.");
#endif /* QUEST */
        }

do_it:
#ifdef QUEST
        return;
#else /* QUEST */
        if (levl[(int)u.ux][(int)u.uy].lit == on)
                return;
        if (levl[(int)u.ux][(int)u.uy].typ == DOOR) {
                if (IS_ROOM(levl[(int)u.ux][(int)u.uy+1].typ))
                        zy = u.uy+1;
                else if(IS_ROOM(levl[(int)u.ux][u.uy-1].typ))
                        zy = u.uy-1;
                else zy = u.uy;
                if(IS_ROOM(levl[u.ux+1][(int)u.uy].typ))
                        zx = u.ux+1;
                else if(IS_ROOM(levl[u.ux-1][(int)u.uy].typ))
                        zx = u.ux-1;
                else zx = u.ux;
        } else {
                zx = u.ux;
                zy = u.uy;
        }
        for(seelx = u.ux; (num = levl[seelx-1][zy].typ) != CORR && num != 0;
                seelx--);
        for(seehx = u.ux; (num = levl[seehx+1][zy].typ) != CORR && num != 0;
                seehx++);
        for(seely = u.uy; (num = levl[zx][seely-1].typ) != CORR && num != 0;
                seely--);
        for(seehy = u.uy; (num = levl[zx][seehy+1].typ) != CORR && num != 0;
                seehy++);
        for(zy = seely; zy <= seehy; zy++)
                for(zx = seelx; zx <= seehx; zx++) {
                        levl[zx][zy].lit = on;
                        if (!Blind && dist(zx,zy) > 2) {
                                if(on)
                                        prl(zx,zy);
                                else
                                        nosee(zx,zy);
                        }
                }
        if(!on)
                seehx = 0;
#endif /* QUEST */
}

/* Test whether we may genocide all monsters with symbol  ch  */
/* arnold@ucsfcgl */
static boolean
monstersym(char ch)
{
        struct permonst *mp;
        extern struct permonst pm_eel;

        /*
         * can't genocide certain monsters
         */
        if (strchr("12 &:", ch))
                return FALSE;

        if (ch == pm_eel.mlet)
                return TRUE;
        for (mp = mons; mp < &mons[CMNUM+2]; mp++)
                if (mp->mlet == ch)
                        return TRUE;
        return FALSE;
}