Function reassign

src/invent.c:4854–4884

give consecutive letters to every item in inventory (for !fixinv mode); gold is always forced to '$' slot at head of list */

/* give consecutive letters to every item in inventory (for !fixinv mode);
   gold is always forced to '$' slot at head of list */
void
reassign(void)
{
    int i;
    struct obj *obj, *prevobj, *goldobj;

    /* first, remove [first instance of] gold from invent, if present */
    prevobj = goldobj = 0;
    for (obj = gi.invent; obj; prevobj = obj, obj = obj->nobj)
        if (obj->oclass == COIN_CLASS) {
            goldobj = obj;
            if (prevobj)
                prevobj->nobj = goldobj->nobj;
            else
                gi.invent = goldobj->nobj;
            break;
        }
    /* second, re-letter the rest of the list */
    for (obj = gi.invent, i = 0; obj; obj = obj->nobj, i++)
        obj->invlet =
            (i < 26) ? ('a' + i) : (i < 52) ? ('A' + i - 26) : NOINVSYM;
    /* third, assign gold the "letter" '$' and re-insert it at head */
    if (goldobj) {
        goldobj->invlet = GOLD_SYM;
        goldobj->nobj = gi.invent;
        gi.invent = goldobj;
    }
    if (i >= 52)
        i = 52 - 1;
    gl.lastinvnr = i;
}

/* invent gold sanity check; used by doorganize() to control how getobj()
   deals with gold and also by wizard mode sanity_check() */