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- /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
- /* hack.invent.c - version 1.0.3 */
-
- #include "hack.h"
- #include <stdio.h>
- extern struct obj *splitobj();
- extern struct obj zeroobj;
- extern char morc;
- extern char quitchars[];
- char *xprname();
-
- #ifndef NOWORM
- #include "def.wseg.h"
- extern struct wseg *wsegs[32];
- #endif NOWORM
-
- #define NOINVSYM '#'
-
- static int lastinvnr = 51; /* 0 ... 51 */
- static
- assigninvlet(otmp)
- register struct obj *otmp;
- {
- boolean inuse[52];
- register int i;
- register struct obj *obj;
-
- for(i = 0; i < 52; i++) inuse[i] = FALSE;
- for(obj = invent; obj; obj = obj->nobj) if(obj != otmp) {
- i = obj->invlet;
- if('a' <= i && i <= 'z') inuse[i - 'a'] = TRUE; else
- if('A' <= i && i <= 'Z') inuse[i - 'A' + 26] = TRUE;
- if(i == otmp->invlet) otmp->invlet = 0;
- }
- if((i = otmp->invlet) &&
- (('a' <= i && i <= 'z') || ('A' <= i && i <= 'Z')))
- return;
- for(i = lastinvnr+1; i != lastinvnr; i++) {
- if(i == 52) { i = -1; continue; }
- if(!inuse[i]) break;
- }
- otmp->invlet = (inuse[i] ? NOINVSYM :
- (i < 26) ? ('a'+i) : ('A'+i-26));
- lastinvnr = i;
- }
-
- struct obj *
- addinv(obj)
- register struct obj *obj;
- {
- register struct obj *otmp;
-
- /* merge or attach to end of chain */
- if(!invent) {
- invent = obj;
- otmp = 0;
- } else
- for(otmp = invent; /* otmp */; otmp = otmp->nobj) {
- if(merged(otmp, obj, 0))
- return(otmp);
- if(!otmp->nobj) {
- otmp->nobj = obj;
- break;
- }
- }
- obj->nobj = 0;
-
- if(flags.invlet_constant) {
- assigninvlet(obj);
- /*
- * The ordering of the chain is nowhere significant
- * so in case you prefer some other order than the
- * historical one, change the code below.
- */
- if(otmp) { /* find proper place in chain */
- otmp->nobj = 0;
- if((invent->invlet ^ 040) > (obj->invlet ^ 040)) {
- obj->nobj = invent;
- invent = obj;
- } else
- for(otmp = invent; ; otmp = otmp->nobj) {
- if(!otmp->nobj ||
- (otmp->nobj->invlet ^ 040) > (obj->invlet ^ 040)){
- obj->nobj = otmp->nobj;
- otmp->nobj = obj;
- break;
- }
- }
- }
- }
-
- return(obj);
- }
-
- useup(obj)
- register struct obj *obj;
- {
- if(obj->quan > 1){
- obj->quan--;
- obj->owt = weight(obj);
- } else {
- setnotworn(obj);
- freeinv(obj);
- obfree(obj, (struct obj *) 0);
- }
- }
-
- freeinv(obj)
- register struct obj *obj;
- {
- register struct obj *otmp;
-
- if(obj == invent)
- invent = invent->nobj;
- else {
- for(otmp = invent; otmp->nobj != obj; otmp = otmp->nobj)
- if(!otmp->nobj) panic("freeinv");
- otmp->nobj = obj->nobj;
- }
- }
-
- /* destroy object in fobj chain (if unpaid, it remains on the bill) */
- delobj(obj) register struct obj *obj; {
- freeobj(obj);
- unpobj(obj);
- obfree(obj, (struct obj *) 0);
- }
-
- /* unlink obj from chain starting with fobj */
- freeobj(obj) register struct obj *obj; {
- register struct obj *otmp;
-
- if(obj == fobj) fobj = fobj->nobj;
- else {
- for(otmp = fobj; otmp->nobj != obj; otmp = otmp->nobj)
- if(!otmp) panic("error in freeobj");
- otmp->nobj = obj->nobj;
- }
- }
-
- /* Note: freegold throws away its argument! */
- freegold(gold) register struct gold *gold; {
- register struct gold *gtmp;
-
- if(gold == fgold) fgold = gold->ngold;
- else {
- for(gtmp = fgold; gtmp->ngold != gold; gtmp = gtmp->ngold)
- if(!gtmp) panic("error in freegold");
- gtmp->ngold = gold->ngold;
- }
- free((char *) gold);
- }
-
- deltrap(trap)
- register struct trap *trap;
- {
- register struct trap *ttmp;
-
- if(trap == ftrap)
- ftrap = ftrap->ntrap;
- else {
- for(ttmp = ftrap; ttmp->ntrap != trap; ttmp = ttmp->ntrap) ;
- ttmp->ntrap = trap->ntrap;
- }
- free((char *) trap);
- }
-
- struct wseg *m_atseg;
-
- struct monst *
- m_at(x,y)
- register x,y;
- {
- register struct monst *mtmp;
- #ifndef NOWORM
- register struct wseg *wtmp;
- #endif NOWORM
-
- m_atseg = 0;
- for(mtmp = fmon; mtmp; mtmp = mtmp->nmon){
- if(mtmp->mx == x && mtmp->my == y)
- return(mtmp);
- #ifndef NOWORM
- if(mtmp->wormno){
- for(wtmp = wsegs[mtmp->wormno]; wtmp; wtmp = wtmp->nseg)
- if(wtmp->wx == x && wtmp->wy == y){
- m_atseg = wtmp;
- return(mtmp);
- }
- }
- #endif NOWORM
- }
- return(0);
- }
-
- struct obj *
- o_at(x,y)
- register x,y;
- {
- register struct obj *otmp;
-
- for(otmp = fobj; otmp; otmp = otmp->nobj)
- if(otmp->ox == x && otmp->oy == y) return(otmp);
- return(0);
- }
-
- struct obj *
- sobj_at(n,x,y)
- register n,x,y;
- {
- register struct obj *otmp;
-
- for(otmp = fobj; otmp; otmp = otmp->nobj)
- if(otmp->ox == x && otmp->oy == y && otmp->otyp == n)
- return(otmp);
- return(0);
- }
-
- carried(obj) register struct obj *obj; {
- register struct obj *otmp;
- for(otmp = invent; otmp; otmp = otmp->nobj)
- if(otmp == obj) return(1);
- return(0);
- }
-
- carrying(type)
- register int type;
- {
- register struct obj *otmp;
-
- for(otmp = invent; otmp; otmp = otmp->nobj)
- if(otmp->otyp == type)
- return(TRUE);
- return(FALSE);
- }
-
- struct obj *
- o_on(id, objchn) unsigned int id; register struct obj *objchn; {
- while(objchn) {
- if(objchn->o_id == id) return(objchn);
- objchn = objchn->nobj;
- }
- return((struct obj *) 0);
- }
-
- struct trap *
- t_at(x,y)
- register x,y;
- {
- register struct trap *trap = ftrap;
- while(trap) {
- if(trap->tx == x && trap->ty == y) return(trap);
- trap = trap->ntrap;
- }
- return(0);
- }
-
- struct gold *
- g_at(x,y)
- register x,y;
- {
- register struct gold *gold = fgold;
- while(gold) {
- if(gold->gx == x && gold->gy == y) return(gold);
- gold = gold->ngold;
- }
- return(0);
- }
-
- /* make dummy object structure containing gold - for temporary use only */
- struct obj *
- mkgoldobj(q)
- register long q;
- {
- register struct obj *otmp;
-
- otmp = newobj(0);
- /* should set o_id etc. but otmp will be freed soon */
- otmp->olet = '$';
- u.ugold -= q;
- OGOLD(otmp) = q;
- flags.botl = 1;
- return(otmp);
- }
-
- /*
- * getobj returns:
- * struct obj *xxx: object to do something with.
- * (struct obj *) 0 error return: no object.
- * &zeroobj explicitly no object (as in w-).
- */
- struct obj *
- getobj(let,word)
- register char *let,*word;
- {
- register struct obj *otmp;
- register char ilet,ilet1,ilet2;
- char buf[BUFSZ];
- char lets[BUFSZ];
- register int foo = 0, foo2;
- register char *bp = buf;
- xchar allowcnt = 0; /* 0, 1 or 2 */
- boolean allowgold = FALSE;
- boolean allowall = FALSE;
- boolean allownone = FALSE;
- xchar foox = 0;
- long cnt;
-
- if(*let == '0') let++, allowcnt = 1;
- if(*let == '$') let++, allowgold = TRUE;
- if(*let == '#') let++, allowall = TRUE;
- if(*let == '-') let++, allownone = TRUE;
- if(allownone) *bp++ = '-';
- if(allowgold) *bp++ = '$';
- if(bp > buf && bp[-1] == '-') *bp++ = ' ';
-
- ilet = 'a';
- for(otmp = invent; otmp; otmp = otmp->nobj){
- if(!*let || index(let, otmp->olet)) {
- bp[foo++] = flags.invlet_constant ? otmp->invlet : ilet;
-
- /* ugly check: remove inappropriate things */
- if((!strcmp(word, "take off") &&
- !(otmp->owornmask & (W_ARMOR - W_ARM2)))
- || (!strcmp(word, "wear") &&
- (otmp->owornmask & (W_ARMOR | W_RING)))
- || (!strcmp(word, "wield") &&
- (otmp->owornmask & W_WEP))) {
- foo--;
- foox++;
- }
- }
- if(ilet == 'z') ilet = 'A'; else ilet++;
- }
- bp[foo] = 0;
- if(foo == 0 && bp > buf && bp[-1] == ' ') *--bp = 0;
- (void) strcpy(lets, bp); /* necessary since we destroy buf */
- if(foo > 5) { /* compactify string */
- foo = foo2 = 1;
- ilet2 = bp[0];
- ilet1 = bp[1];
- while(ilet = bp[++foo2] = bp[++foo]){
- if(ilet == ilet1+1){
- if(ilet1 == ilet2+1)
- bp[foo2 - 1] = ilet1 = '-';
- else if(ilet2 == '-') {
- bp[--foo2] = ++ilet1;
- continue;
- }
- }
- ilet2 = ilet1;
- ilet1 = ilet;
- }
- }
- if(!foo && !allowall && !allowgold && !allownone) {
- pline("You don't have anything %sto %s.",
- foox ? "else " : "", word);
- return(0);
- }
- for(;;) {
- if(!buf[0])
- pline("What do you want to %s [*]? ", word);
- else
- pline("What do you want to %s [%s or ?*]? ",
- word, buf);
-
- cnt = 0;
- ilet = readchar();
- while(digit(ilet) && allowcnt) {
- if (cnt < 100000000)
- cnt = 10*cnt + (ilet - '0');
- else
- cnt = 999999999;
- allowcnt = 2; /* signal presence of cnt */
- ilet = readchar();
- }
- if(digit(ilet)) {
- pline("No count allowed with this command.");
- continue;
- }
- if(index(quitchars,ilet))
- return((struct obj *)0);
- if(ilet == '-') {
- return(allownone ? &zeroobj : (struct obj *) 0);
- }
- if(ilet == '$') {
- if(!allowgold){
- pline("You cannot %s gold.", word);
- continue;
- }
- if(!(allowcnt == 2 && cnt < u.ugold))
- cnt = u.ugold;
- return(mkgoldobj(cnt));
- }
- if(ilet == '?') {
- doinv(lets);
- if(!(ilet = morc)) continue;
- /* he typed a letter (not a space) to more() */
- } else if(ilet == '*') {
- doinv((char *) 0);
- if(!(ilet = morc)) continue;
- /* ... */
- }
- if(flags.invlet_constant) {
- for(otmp = invent; otmp; otmp = otmp->nobj)
- if(otmp->invlet == ilet) break;
- } else {
- if(ilet >= 'A' && ilet <= 'Z') ilet += 'z'-'A'+1;
- ilet -= 'a';
- for(otmp = invent; otmp && ilet;
- ilet--, otmp = otmp->nobj) ;
- }
- if(!otmp) {
- pline("You don't have that object.");
- continue;
- }
- if(cnt < 0 || otmp->quan < cnt) {
- pline("You don't have that many! [You have %u]"
- , otmp->quan);
- continue;
- }
- break;
- }
- if(!allowall && let && !index(let,otmp->olet)) {
- pline("That is a silly thing to %s.",word);
- return(0);
- }
- if(allowcnt == 2) { /* cnt given */
- if(cnt == 0) return(0);
- if(cnt != otmp->quan) {
- register struct obj *obj;
- obj = splitobj(otmp, (int) cnt);
- if(otmp == uwep) setuwep(obj);
- }
- }
- return(otmp);
- }
-
- ckunpaid(otmp) register struct obj *otmp; {
- return( otmp->unpaid );
- }
-
- /* interactive version of getobj - used for Drop and Identify */
- /* return the number of times fn was called successfully */
- ggetobj(word, fn, max)
- char *word;
- int (*fn)(), max;
- {
- char buf[BUFSZ];
- register char *ip;
- register char sym;
- register int oletct = 0, iletct = 0;
- register boolean allflag = FALSE;
- char olets[20], ilets[20];
- int (*ckfn)() = (int (*)()) 0;
- xchar allowgold = (u.ugold && !strcmp(word, "drop")) ? 1 : 0; /* BAH */
- if(!invent && !allowgold){
- pline("You have nothing to %s.", word);
- return(0);
- } else {
- register struct obj *otmp = invent;
- register int uflg = 0;
-
- if(allowgold) ilets[iletct++] = '$';
- ilets[iletct] = 0;
- while(otmp) {
- if(!index(ilets, otmp->olet)){
- ilets[iletct++] = otmp->olet;
- ilets[iletct] = 0;
- }
- if(otmp->unpaid) uflg = 1;
- otmp = otmp->nobj;
- }
- ilets[iletct++] = ' ';
- if(uflg) ilets[iletct++] = 'u';
- if(invent) ilets[iletct++] = 'a';
- ilets[iletct] = 0;
- }
- pline("What kinds of thing do you want to %s? [%s] ",
- word, ilets);
- getlin(buf);
- if(buf[0] == '\033') {
- clrlin();
- return(0);
- }
- ip = buf;
- olets[0] = 0;
- while(sym = *ip++){
- if(sym == ' ') continue;
- if(sym == '$') {
- if(allowgold == 1)
- (*fn)(mkgoldobj(u.ugold));
- else if(!u.ugold)
- pline("You have no gold.");
- allowgold = 2;
- } else
- if(sym == 'a' || sym == 'A') allflag = TRUE; else
- if(sym == 'u' || sym == 'U') ckfn = ckunpaid; else
- if(index("!%?[()=*/\"0", sym)){
- if(!index(olets, sym)){
- olets[oletct++] = sym;
- olets[oletct] = 0;
- }
- }
- else pline("You don't have any %c's.", sym);
- }
- if(allowgold == 2 && !oletct)
- return(1); /* he dropped gold (or at least tried to) */
- else
- return(askchain(invent, olets, allflag, fn, ckfn, max));
- }
-
- /*
- * Walk through the chain starting at objchn and ask for all objects
- * with olet in olets (if nonNULL) and satisfying ckfn (if nonNULL)
- * whether the action in question (i.e., fn) has to be performed.
- * If allflag then no questions are asked. Max gives the max nr of
- * objects to be treated. Return the number of objects treated.
- */
- askchain(objchn, olets, allflag, fn, ckfn, max)
- struct obj *objchn;
- register char *olets;
- int allflag;
- int (*fn)(), (*ckfn)();
- int max;
- {
- register struct obj *otmp, *otmp2;
- register char sym, ilet;
- register int cnt = 0;
- ilet = 'a'-1;
- for(otmp = objchn; otmp; otmp = otmp2){
- if(ilet == 'z') ilet = 'A'; else ilet++;
- otmp2 = otmp->nobj;
- if(olets && *olets && !index(olets, otmp->olet)) continue;
- if(ckfn && !(*ckfn)(otmp)) continue;
- if(!allflag) {
- pline(xprname(otmp, ilet));
- addtopl(" [nyaq]? ");
- sym = readchar();
- }
- else sym = 'y';
-
- switch(sym){
- case 'a':
- allflag = 1;
- case 'y':
- cnt += (*fn)(otmp);
- if(--max == 0) goto ret;
- case 'n':
- default:
- break;
- case 'q':
- goto ret;
- }
- }
- pline(cnt ? "That was all." : "No applicable objects.");
- ret:
- return(cnt);
- }
-
- obj_to_let(obj) /* should of course only be called for things in invent */
- register struct obj *obj;
- {
- register struct obj *otmp;
- register char ilet;
-
- if(flags.invlet_constant)
- return(obj->invlet);
- ilet = 'a';
- for(otmp = invent; otmp && otmp != obj; otmp = otmp->nobj)
- if(++ilet > 'z') ilet = 'A';
- return(otmp ? ilet : NOINVSYM);
- }
-
- prinv(obj)
- register struct obj *obj;
- {
- pline(xprname(obj, obj_to_let(obj)));
- }
-
- static char *
- xprname(obj,let)
- register struct obj *obj;
- register char let;
- {
- static char li[BUFSZ];
-
- (void) sprintf(li, "%c - %s.",
- flags.invlet_constant ? obj->invlet : let,
- doname(obj));
- return(li);
- }
-
- ddoinv()
- {
- doinv((char *) 0);
- return(0);
- }
-
- /* called with 0 or "": all objects in inventory */
- /* otherwise: all objects with (serial) letter in lets */
- doinv(lets)
- register char *lets;
- {
- register struct obj *otmp;
- register char ilet;
- int ct = 0;
- char any[BUFSZ];
-
- morc = 0; /* just to be sure */
-
- if(!invent){
- pline("Not carrying anything.");
- return;
- }
-
- cornline(0, (char *) 0);
- ilet = 'a';
- for(otmp = invent; otmp; otmp = otmp->nobj) {
- if(flags.invlet_constant) ilet = otmp->invlet;
- if(!lets || !*lets || index(lets, ilet)) {
- cornline(1, xprname(otmp, ilet));
- any[ct++] = ilet;
- }
- if(!flags.invlet_constant) if(++ilet > 'z') ilet = 'A';
- }
- any[ct] = 0;
- cornline(2, any);
- }
-
- dotypeinv () /* free after Robert Viduya */
- /* Changed to one type only, so he doesnt have to type cr */
- {
- char c, ilet;
- char stuff[BUFSZ];
- register int stct;
- register struct obj *otmp;
- boolean billx = inshop() && doinvbill(0);
- boolean unpd = FALSE;
-
- if (!invent && !u.ugold && !billx) {
- pline ("You aren't carrying anything.");
- return(0);
- }
-
- stct = 0;
- if(u.ugold) stuff[stct++] = '$';
- stuff[stct] = 0;
- for(otmp = invent; otmp; otmp = otmp->nobj) {
- if (!index (stuff, otmp->olet)) {
- stuff[stct++] = otmp->olet;
- stuff[stct] = 0;
- }
- if(otmp->unpaid)
- unpd = TRUE;
- }
- if(unpd) stuff[stct++] = 'u';
- if(billx) stuff[stct++] = 'x';
- stuff[stct] = 0;
-
- if(stct > 1) {
- pline ("What type of object [%s] do you want an inventory of? ",
- stuff);
- c = readchar();
- if(index(quitchars,c)) return(0);
- } else
- c = stuff[0];
-
- if(c == '$')
- return(doprgold());
-
- if(c == 'x' || c == 'X') {
- if(billx)
- (void) doinvbill(1);
- else
- pline("No used-up objects on the shopping bill.");
- return(0);
- }
-
- if((c == 'u' || c == 'U') && !unpd) {
- pline("You are not carrying any unpaid objects.");
- return(0);
- }
-
- stct = 0;
- ilet = 'a';
- for (otmp = invent; otmp; otmp = otmp -> nobj) {
- if(flags.invlet_constant) ilet = otmp->invlet;
- if (c == otmp -> olet || (c == 'u' && otmp -> unpaid))
- stuff[stct++] = ilet;
- if(!flags.invlet_constant) if(++ilet > 'z') ilet = 'A';
- }
- stuff[stct] = '\0';
- if(stct == 0)
- pline("You have no such objects.");
- else
- doinv (stuff);
-
- return(0);
- }
-
- /* look at what is here */
- dolook() {
- register struct obj *otmp, *otmp0;
- register struct gold *gold;
- char *verb = Blind ? "feel" : "see";
- int ct = 0;
-
- if(!u.uswallow) {
- if(Blind) {
- pline("You try to feel what is lying here on the floor.");
- if(Levitation) { /* ab@unido */
- pline("You cannot reach the floor!");
- return(1);
- }
- }
- otmp0 = o_at(u.ux, u.uy);
- gold = g_at(u.ux, u.uy);
- }
-
- if(u.uswallow || (!otmp0 && !gold)) {
- pline("You %s no objects here.", verb);
- return(!!Blind);
- }
-
- cornline(0, "Things that are here:");
- for(otmp = otmp0; otmp; otmp = otmp->nobj) {
- if(otmp->ox == u.ux && otmp->oy == u.uy) {
- ct++;
- cornline(1, doname(otmp));
- if(Blind && otmp->otyp == DEAD_COCKATRICE && !uarmg) {
- pline("Touching the dead cockatrice is a fatal mistake ...");
- pline("You die ...");
- killer = "dead cockatrice";
- done("died");
- }
- }
- }
-
- if(gold) {
- char gbuf[30];
-
- (void) sprintf(gbuf, "%ld gold piece%s",
- gold->amount, plur(gold->amount));
- if(!ct++)
- pline("You %s here %s.", verb, gbuf);
- else
- cornline(1, gbuf);
- }
-
- if(ct == 1 && !gold) {
- pline("You %s here %s.", verb, doname(otmp0));
- cornline(3, (char *) 0);
- }
- if(ct > 1)
- cornline(2, (char *) 0);
- return(!!Blind);
- }
-
- stackobj(obj) register struct obj *obj; {
- register struct obj *otmp = fobj;
- for(otmp = fobj; otmp; otmp = otmp->nobj) if(otmp != obj)
- if(otmp->ox == obj->ox && otmp->oy == obj->oy &&
- merged(obj,otmp,1))
- return;
- }
-
- /* merge obj with otmp and delete obj if types agree */
- merged(otmp,obj,lose) register struct obj *otmp, *obj; {
- if(obj->otyp == otmp->otyp &&
- obj->unpaid == otmp->unpaid &&
- obj->spe == otmp->spe &&
- obj->dknown == otmp->dknown &&
- obj->cursed == otmp->cursed &&
- (index("%*?!", obj->olet) ||
- (obj->known == otmp->known &&
- (obj->olet == WEAPON_SYM && obj->otyp < BOOMERANG)))) {
- otmp->quan += obj->quan;
- otmp->owt += obj->owt;
- if(lose) freeobj(obj);
- obfree(obj,otmp); /* free(obj), bill->otmp */
- return(1);
- } else return(0);
- }
-
- /*
- * Gold is no longer displayed; in fact, when you have a lot of money,
- * it may take a while before you have counted it all.
- * [Bug: d$ and pickup still tell you how much it was.]
- */
- extern int (*occupation)();
- extern char *occtxt;
- static long goldcounted;
-
- countgold(){
- if((goldcounted += 100*(u.ulevel + 1)) >= u.ugold) {
- long eps = 0;
- if(!rn2(2)) eps = rnd((int) (u.ugold/100 + 1));
- pline("You probably have about %ld gold pieces.",
- u.ugold + eps);
- return(0); /* done */
- }
- return(1); /* continue */
- }
-
- doprgold(){
- if(!u.ugold)
- pline("You do not carry any gold.");
- else if(u.ugold <= 500)
- pline("You are carrying %ld gold pieces.", u.ugold);
- else {
- pline("You sit down in order to count your gold pieces.");
- goldcounted = 500;
- occupation = countgold;
- occtxt = "counting your gold";
- }
- return(1);
- }
-
- /* --- end of gold counting section --- */
-
- doprwep(){
- if(!uwep) pline("You are empty handed.");
- else prinv(uwep);
- return(0);
- }
-
- doprarm(){
- if(!uarm && !uarmg && !uarms && !uarmh)
- pline("You are not wearing any armor.");
- else {
- char lets[6];
- register int ct = 0;
-
- if(uarm) lets[ct++] = obj_to_let(uarm);
- if(uarm2) lets[ct++] = obj_to_let(uarm2);
- if(uarmh) lets[ct++] = obj_to_let(uarmh);
- if(uarms) lets[ct++] = obj_to_let(uarms);
- if(uarmg) lets[ct++] = obj_to_let(uarmg);
- lets[ct] = 0;
- doinv(lets);
- }
- return(0);
- }
-
- doprring(){
- if(!uleft && !uright)
- pline("You are not wearing any rings.");
- else {
- char lets[3];
- register int ct = 0;
-
- if(uleft) lets[ct++] = obj_to_let(uleft);
- if(uright) lets[ct++] = obj_to_let(uright);
- lets[ct] = 0;
- doinv(lets);
- }
- return(0);
- }
-
- digit(c) char c; {
- return(c >= '0' && c <= '9');
- }
-