HashNode
addhashnode2(HashTable ht, char *nam, void *nodeptr)
{
unsigned hashval;
HashNode hn, hp, hq;
hn = (HashNode) nodeptr;
hn->nam = nam;
hashval = ht->hash(hn->nam) % ht->hsize;
hp = ht->nodes[hashval];
/* check if this is the first node for this hash value */
if (!hp) {
hn->next = NULL;
ht->nodes[hashval] = hn;
if (++ht->ct >= ht->hsize * 2 && !ht->scan)
expandhashtable(ht);
return NULL;
}
/* else check if the first node contains the same key */
if (ht->cmpnodes(hp->nam, hn->nam) == 0) {
ht->nodes[hashval] = hn;
replacing:
hn->next = hp->next;
if(ht->scan) {
if(ht->scan->sorted) {
HashNode *tab = ht->scan->u.s.tab;
int i;
for(i = ht->scan->u.s.ct; i--; )
if(tab[i] == hp)
tab[i] = hn;
} else if(ht->scan->u.u == hp)
ht->scan->u.u = hn;
}
return hp;
}
/* else run through the list and check all the keys */
hq = hp;
hp = hp->next;
for (; hp; hq = hp, hp = hp->next) {
if (ht->cmpnodes(hp->nam, hn->nam) == 0) {
hq->next = hn;
goto replacing;
}
}
/* else just add it at the front of the list */
hn->next = ht->nodes[hashval];
ht->nodes[hashval] = hn;
if (++ht->ct >= ht->hsize * 2 && !ht->scan)
expandhashtable(ht);
return NULL;
}
mod_export HashNode
removehashnode(HashTable ht, char *nam)
{
unsigned hashval;
HashNode hp, hq;
hashval = ht->hash(nam) % ht->hsize;
hp = ht->nodes[hashval];
/* if no nodes at this hash value, return NULL */
if (!hp)
return NULL;
/* else check if the key in the first one matches */
if (ht->cmpnodes(hp->nam, nam) == 0) {
ht->nodes[hashval] = hp->next;
gotit:
ht->ct--;
if(ht->scan) {
if(ht->scan->sorted) {
HashNode *tab = ht->scan->u.s.tab;
int i;
for(i = ht->scan->u.s.ct; i--; )
if(tab[i] == hp)
tab[i] = NULL;
} else if(ht->scan->u.u == hp)
ht->scan->u.u = hp->next;
}
return hp;
}
/* else run through the list and check the rest of the keys */
hq = hp;
hp = hp->next;
for (; hp; hq = hp, hp = hp->next) {
if (ht->cmpnodes(hp->nam, nam) == 0) {
hq->next = hp->next;
goto gotit;
}
}
/* else it is not in the list, so return NULL */
return NULL;
}
mod_export HashNode
gethashnode2(HashTable ht, char *nam)
{
unsigned hashval;
HashNode hp;
hashval = ht->hash(nam) % ht->hsize;
for (hp = ht->nodes[hashval]; hp; hp = hp->next) {
if (ht->cmpnodes(hp->nam, nam) == 0)
return hp;
}
return NULL;
}
mod_export HashNode
gethashnode(HashTable ht, const char *nam)
{
unsigned hashval;
HashNode hp;
hashval = ht->hash(nam) % ht->hsize;
for (hp = ht->nodes[hashval]; hp; hp = hp->next) {
if (ht->cmpnodes(hp->nam, nam) == 0) {
if (hp->flags & DISABLED)
return NULL;
else
return hp;
}
}
return NULL;
}
