usr/src/games/hack/hack.engrave.c

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

#include        "hack.h"

extern char *nomovemsg;
extern char nul[];
extern struct obj zeroobj;
struct engr {
        struct engr *nxt_engr;
        char *engr_txt;
        xchar engr_x, engr_y;
        unsigned engr_lth;      /* for save & restore; not length of text */
        long engr_time; /* moment engraving was (will be) finished */
        xchar engr_type;
#define DUST    1
#define ENGRAVE 2
#define BURN    3
} *head_engr;

struct engr *
engr_at(x,y) register xchar x,y; {
register struct engr *ep = head_engr;
        while(ep) {
                if(x == ep->engr_x && y == ep->engr_y)
                        return(ep);
                ep = ep->nxt_engr;
        }
        return((struct engr *) 0);
}

sengr_at(s,x,y) register char *s; register xchar x,y; {
register struct engr *ep = engr_at(x,y);
register char *t;
register int n;
        if(ep && ep->engr_time <= moves) {
                t = ep->engr_txt;
/*
                if(!strcmp(s,t)) return(1);
*/
                n = strlen(s);
                while(*t) {
                        if(!strncmp(s,t,n)) return(1);
                        t++;
                }
        }
        return(0);
}

u_wipe_engr(cnt)
register int cnt;
{
        if(!u.uswallow && !Levitation)
                wipe_engr_at(u.ux, u.uy, cnt);
}

wipe_engr_at(x,y,cnt) register xchar x,y,cnt; {
register struct engr *ep = engr_at(x,y);
register int lth,pos;
char ch;
        if(ep){
                if((ep->engr_type != DUST) || Levitation) {
                        cnt = rn2(1 + 50/(cnt+1)) ? 0 : 1;
                }
                lth = strlen(ep->engr_txt);
                if(lth && cnt > 0 ) {
                        while(cnt--) {
                                pos = rn2(lth);
                                if((ch = ep->engr_txt[pos]) == ' ')
                                        continue;
                                ep->engr_txt[pos] = (ch != '?') ? '?' : ' ';
                        }
                }
                while(lth && ep->engr_txt[lth-1] == ' ')
                        ep->engr_txt[--lth] = 0;
                while(ep->engr_txt[0] == ' ')
                        ep->engr_txt++;
                if(!ep->engr_txt[0]) del_engr(ep);
        }
}

read_engr_at(x,y) register int x,y; {
register struct engr *ep = engr_at(x,y);
        if(ep && ep->engr_txt[0]) {
            switch(ep->engr_type) {
            case DUST:
                pline("Something is written here in the dust.");
                break;
            case ENGRAVE:
                pline("Something is engraved here on the floor.");
                break;
            case BURN:
                pline("Some text has been burned here in the floor.");
                break;
            default:
                impossible("Something is written in a very strange way.");
            }
            pline("You read: \"%s\".", ep->engr_txt);
        }
}

make_engr_at(x,y,s)
register int x,y;
register char *s;
{
        register struct engr *ep;

        if(ep = engr_at(x,y))
            del_engr(ep);
        ep = (struct engr *)
            alloc((unsigned)(sizeof(struct engr) + strlen(s) + 1));
        ep->nxt_engr = head_engr;
        head_engr = ep;
        ep->engr_x = x;
        ep->engr_y = y;
        ep->engr_txt = (char *)(ep + 1);
        (void) strcpy(ep->engr_txt, s);
        ep->engr_time = 0;
        ep->engr_type = DUST;
        ep->engr_lth = strlen(s) + 1;
}

doengrave(){
register int len;
register char *sp;
register struct engr *ep, *oep = engr_at(u.ux,u.uy);
char buf[BUFSZ];
xchar type;
int spct;               /* number of leading spaces */
register struct obj *otmp;
        multi = 0;

        if(u.uswallow) {
                pline("You're joking. Hahaha!");        /* riv05!a3 */
                return(0);
        }

        /* one may write with finger, weapon or wand */
        otmp = getobj("#-)/", "write with");
        if(!otmp) return(0);

        if(otmp == &zeroobj)
                otmp = 0;
        if(otmp && otmp->otyp == WAN_FIRE && otmp->spe) {
                type = BURN;
                otmp->spe--;
        } else {
                /* first wield otmp */
                if(otmp != uwep) {
                        if(uwep && uwep->cursed) {
                            /* Andreas Bormann */
                            pline("Since your weapon is welded to your hand,");
                            pline("you use the %s.", aobjnam(uwep, (char *) 0));
                            otmp = uwep;
                        } else {
                            if(!otmp)
                                pline("You are now empty-handed.");
                            else if(otmp->cursed)
                                pline("The %s %s to your hand!",
                                    aobjnam(otmp, "weld"),
                                    (otmp->quan == 1) ? "itself" : "themselves");
                            else
                                pline("You now wield %s.", doname(otmp));
                            setuwep(otmp);
                        }
                }

                if(!otmp)
                        type = DUST;
                else
                if(otmp->otyp == DAGGER || otmp->otyp == TWO_HANDED_SWORD ||
                otmp->otyp == CRYSKNIFE ||
                otmp->otyp == LONG_SWORD || otmp->otyp == AXE) {
                        type = ENGRAVE;
                        if((int)otmp->spe <= -3) {
                                type = DUST;
                                pline("Your %s too dull for engraving.",
                                        aobjnam(otmp, "are"));
                                if(oep && oep->engr_type != DUST) return(1);
                        }
                } else  type = DUST;
        }
        if(Levitation && type != BURN){         /* riv05!a3 */
                pline("You can't reach the floor!");
                return(1);
        }
        if(oep && oep->engr_type == DUST){
                  pline("You wipe out the message that was written here.");
                  del_engr(oep);
                  oep = 0;
        }
        if(type == DUST && oep){
        pline("You cannot wipe out the message that is %s in the rock.",
                    (oep->engr_type == BURN) ? "burned" : "engraved");
                  return(1);
        }

        pline("What do you want to %s on the floor here? ",
          (type == ENGRAVE) ? "engrave" : (type == BURN) ? "burn" : "write");
        getlin(buf);
        clrlin();
        spct = 0;
        sp = buf;
        while(*sp == ' ') spct++, sp++;
        len = strlen(sp);
        if(!len || *buf == '\033') {
                if(type == BURN) otmp->spe++;
                return(0);
        }

        switch(type) {
        case DUST:
        case BURN:
                if(len > 15) {
                        multi = -(len/10);
                        nomovemsg = "You finished writing.";
                }
                break;
        case ENGRAVE:           /* here otmp != 0 */
                {       int len2 = (otmp->spe + 3) * 2 + 1;

                        pline("Your %s dull.", aobjnam(otmp, "get"));
                        if(len2 < len) {
                                len = len2;
                                sp[len] = 0;
                                otmp->spe = -3;
                                nomovemsg = "You cannot engrave more.";
                        } else {
                                otmp->spe -= len/2;
                                nomovemsg = "You finished engraving.";
                        }
                        multi = -len;
                }
                break;
        }
        if(oep) len += strlen(oep->engr_txt) + spct;
        ep = (struct engr *) alloc((unsigned)(sizeof(struct engr) + len + 1));
        ep->nxt_engr = head_engr;
        head_engr = ep;
        ep->engr_x = u.ux;
        ep->engr_y = u.uy;
        sp = (char *)(ep + 1);  /* (char *)ep + sizeof(struct engr) */
        ep->engr_txt = sp;
        if(oep) {
                (void) strcpy(sp, oep->engr_txt);
                (void) strcat(sp, buf);
                del_engr(oep);
        } else
                (void) strcpy(sp, buf);
        ep->engr_lth = len+1;
        ep->engr_type = type;
        ep->engr_time = moves-multi;

        /* kludge to protect pline against excessively long texts */
        if(len > BUFSZ-20) sp[BUFSZ-20] = 0;

        return(1);
}

save_engravings(fd) int fd; {
register struct engr *ep = head_engr;
        while(ep) {
                if(!ep->engr_lth || !ep->engr_txt[0]){
                        ep = ep->nxt_engr;
                        continue;
                }
                bwrite(fd, (char *) & (ep->engr_lth), sizeof(ep->engr_lth));
                bwrite(fd, (char *) ep, sizeof(struct engr) + ep->engr_lth);
                ep = ep->nxt_engr;
        }
        bwrite(fd, (char *) nul, sizeof(unsigned));
        head_engr = 0;
}

rest_engravings(fd) int fd; {
register struct engr *ep;
unsigned lth;
        head_engr = 0;
        while(1) {
                mread(fd, (char *) &lth, sizeof(unsigned));
                if(lth == 0) return;
                ep = (struct engr *) alloc(sizeof(struct engr) + lth);
                mread(fd, (char *) ep, sizeof(struct engr) + lth);
                ep->nxt_engr = head_engr;
                ep->engr_txt = (char *) (ep + 1);       /* Andreas Bormann */
                head_engr = ep;
        }
}

del_engr(ep) register struct engr *ep; {
register struct engr *ept;
        if(ep == head_engr)
                head_engr = ep->nxt_engr;
        else {
                for(ept = head_engr; ept; ept = ept->nxt_engr) {
                        if(ept->nxt_engr == ep) {
                                ept->nxt_engr = ep->nxt_engr;
                                goto fnd;
                        }
                }
                impossible("Error in del_engr?");
                return;
        fnd:    ;
        }
        free((char *) ep);
}