link LLRBinsert(link h, Item *item) {
Key v = key(item);
/* Insert a new node at the bottom*/
conflict = NULL;
if (h == z) {
return NEW(item, z, z, 1, 1);
}
if (less(v, key(h->item)))
hl = LLRBinsert(hl, item);
else if (eq(v, key(h->item))) { /* If the object we are trying to insert is already there,
we opt to return a pointer to the existing item, so that
the user may choose what to do (i.e. create a list of items) */
conflict = h->item;
}
else
hr = LLRBinsert(hr, item);
/* Enforce left-leaning condition */
if (hr->red && !hl->red) h = rotL(h);
if (hl->red && hll->red) h = rotR(h);
if (hl->red && hr->red) colorFlip(h);
return fixNr(h);
}
static link LLRBinsert(link h, EnglishWord newWord){
Key v = makeKey(newWord);
int val = 0;
if (compareNodes(h,z))
return NEW(newWord, z, z, 1);
val = compareKeys(v,makeKey(h->englishWord));
if ( val < 0)
hl = LLRBinsert(hl, newWord);
else
hr = LLRBinsert(hr, newWord);
if (hr->red && !hl->red)
h = rotL(h);
if (hl->red && hll->red)
h = rotR(h);
if (hl->red && hr->red)
colorFlip(h);
return h;
}
link STinsert(link head, Item *item) {
head = LLRBinsert(head, item);
head->red = 0;
return head;
}
static void STinsert(EnglishWord newWord){
head = LLRBinsert(head, newWord);
head->red = 0;
}
