void delete_elem(node** t, int val) {
if(!(*t))
return;
if((*t)->data < val)
delete_elem(&(*t)->right, val);
else if((*t)->data > val)
delete_elem(&(*t)->left, val);
else {
if((*t)->dup_count) // there were no duplicates
--(*t)->dup_count;
else {
node* del;
if(!(*t)->left) {
del = (*t);
(*t) = (*t)->right;
free(del);
}
else if(!(*t)->right) {
del = (*t);
(*t) = (*t)->left;
free(del);
}
else {
del = find_min((*t)->right);
(*t)->data = del->data;
delete_elem(&(*t)->right, del->data);
}
}
}
}
int delete_from_buffer(bool right) {
if(right) {
forward_buffer();
} else {
wprintf(L"\033[1D");
}
if(buffer->current == NULL) {
return RET_OK;
} else {
wprintf(L"\033[K");
}
delete_elem(buffer);
if(buffer->current == NULL) {
print_buffer(true);
wprintf(L"\033[1D");
return RET_OK;
}
if(buffer->current->next != NULL) {
forward_buffer();
print_buffer(true);
backward_buffer();
wprintf(L"\033[1D");
}
return RET_OK;
}
int free_list(List *list) {
while(list->queue != NULL) {
delete_elem(list);
}
return RET_OK;
}
static
void delete_list(list_t *list)
{
elem_t *iter = list->head;
while (iter != NULL) {
elem_t *next = iter->next;
delete_elem(iter);
iter = next;
}
dr_global_free(list, sizeof(list_t));
}
t_list *delete_elem(t_list *list, char *data)
{
t_list *tmp_next;
if (list == NULL)
return (NULL);
if (list->data == data)
{
tmp_next = list->next;
return (tmp_next);
}
list->next = delete_elem(list->next, data);
return (list);
}
int main() {
srand(time(NULL));
node* tree = create_bst(40);
for(uint i = 0; i < 10; ++i) {
int elem = rand() % 100 + 1;
insert(&tree, elem);
}
display_tree(tree);
int input;
do {
printf("Enter value to delete: ");
scanf("%d", &input);
delete_elem(&tree, input);
display_tree(tree);
} while(input != -1);
return 0;
}
void format(struct item *head)
{
struct item *elem1 = head;
struct item *elem2 = head->next;
while (elem1 != NULL && elem1->next != NULL)
{
elem2 = elem1->next;
while (elem2 != NULL)
{
if (elem1->power == elem2->power)
{
elem1->num = elem1->num + elem2->num;
struct item *prev = find_prev(head, elem2);
delete_elem(&head, elem2);
elem2 = prev->next;
}
else
elem2 = elem2->next;
}
elem1 = elem1->next;
}
}
int ft_unset(char **scmd, t_env **env, t_cmd *cmd, t_data *data)
{
int ret;
if (!scmd[1])
{
putstr_builtin(cmd, "unset: Too few arguments.\n", 2);
return (1);
}
ret = 1;
if (isset_arg(*env, scmd[1]))
{
delete_elem(env, scmd[1]);
ret = 0;
}
if (isset_var(data->var, scmd[1]))
{
delete_elem_var(&(data->var), scmd[1]);
ret = 0;
}
return (ret);
}
void recieveUpdate(){
struct sockaddr_in addr;
int fd, nbytes,addrlen;
struct ip_mreq mreq;
char buf[BUF_SIZE];
u_int yes=1;
/* create what looks like an ordinary UDP socket */
if ((fd=socket(AF_INET,SOCK_DGRAM,0)) < 0) {
perror("socket");
exit(1);
}
/**** MODIFICATION TO ORIGINAL */
/* allow multiple sockets to use the same PORT number */
if (setsockopt(fd,SOL_SOCKET,SO_REUSEADDR,&yes,sizeof(yes)) < 0) {
perror("Reusing ADDR failed");
exit(1);
}
/*** END OF MODIFICATION TO ORIGINAL */
/* set up destination address */
memset(&addr,0,sizeof(addr));
addr.sin_family=AF_INET;
addr.sin_addr.s_addr=htonl(INADDR_ANY); /* N.B.: differs from sender */
addr.sin_port=htons(PORT);
/* bind to receive address */
if (bind(fd,(struct sockaddr *) &addr,sizeof(addr)) < 0) {
perror("bind");
exit(1);
}
printf("\nlisten on socket UDP %i\n", PORT);
/* use setsockopt() to request that the kernel join a multicast group */
mreq.imr_multiaddr.s_addr=inet_addr(DST_IP);
mreq.imr_interface.s_addr=htonl(INADDR_ANY);
if (setsockopt(fd,IPPROTO_IP,IP_ADD_MEMBERSHIP,&mreq,sizeof(mreq)) < 0) {
perror("setsockopt");
exit(1);
}
/* now just enter a read-print loop */
while (1) {
addrlen=sizeof(addr);
if ((nbytes=recvfrom(fd,buf,BUF_SIZE,0,(struct sockaddr *) &addr,&addrlen)) < 0) {
perror("recvfrom");
exit(1);
}
printf("recived RIP update from %s\n", intToIp(addr.sin_addr.s_addr));
int entrySize = sizeof(entry)-sizeof(UT_hash_handle);
int i;
int numOfEntries = (nbytes - sizeof(header))/entrySize;
for(i = 0; i < numOfEntries; i++){
entry *e = malloc(entrySize);
memcpy(e, &buf[4+i*entrySize], entrySize);
uint32_t network = e->network_addr;
struct entry *entr = find_elem(network);
if(entr == NULL && e->metric <= 15){
sem_wait(&mutex);
add_elem(entr);
printf("%s/%s Metric %u",intToIp(entr->network_addr), intToIp(entr->subnet_mask), entr->metric);
sem_post(&mutex);
}else{
if(entr->network_addr == 2130706432) continue;
if(e->metric < entr->metric && e->metric <= 15){
sem_wait(&mutex);
printf("%s/%s Metric %u",intToIp(entr->network_addr), intToIp(entr->subnet_mask), entr->metric);
printf("found better route to %s %s Metric %u through %s\n", intToIp(entr->network_addr), intToIp(entr->subnet_mask), entr->metric, intToIp(e->next_hop));
delete_elem(entr);
add_elem(e);
sem_post(&mutex);
}
}
}
}
}
int main(int argc, char *argv[]) {
int ch;
int k_size=0,val_size=0;
char* k=NULL,*val=NULL;
do{
printf("Choose the option:\n");
printf("1.Create new table\n");
printf("2.Insert new element\n");
printf("3.Search element\n");
printf("4.Get hashed value of a key\n");
printf("5.Delete table\n");
printf("6.Print key-value pairs of the table\n");
printf("7.Delete element\n");
scanf("%d",&ch);
printf("You entered\t%d\n",ch);
switch(ch){
case 1:
if(ht)
free(ht);
ht=(HT*)malloc(table_size*sizeof(HT));
for(ch=0;ch<table_size;ch++)
ht[ch].coll_res=-1;
if(!ht){
printf("Error allocating memory for table\n");
break;
}else
printf("Empty Table of size \t%d\tcreated\n",table_size);
break;
case 2:
if(!ht){
printf("First create empty table\n");
break;
}
/*printf("Enter the maximum sizes of key and value\n");
scanf("%d%d",&k_size,&val_size);*/
k=(char*)malloc((k_size+1)*sizeof(char));
val=(char*)malloc((val_size+1)*sizeof(char));
if(k && val){
printf("Enter key-value pair to insert\n");
scanf("%s%s",k,val);
elem1=(elem*)malloc(sizeof(elem));
if(!elem1){
printf("Error allocating memory for new element\n");
break;
}
elem1->key=k;
elem1->value=val;
insert(elem1);
break;
}else{
printf("Error allocating memories for key-value pair\n");
break;
}
case 3:
if(!ht){
printf("First create empty table\n");
break;
}
/*printf("Enter the maximum size of key to be searched\n");
scanf("%d",&k_size);*/
k=(char*)malloc((k_size+1)*sizeof(char));
printf("Enter key to search for element\n");
scanf("%s",k);
search(k);
break;
case 4:
if(!ht){
printf("First create empty table\n");
break;
}
/*printf("Enter the maximum size of key \n");
scanf("%d",&k_size);*/
k=(char*)malloc((k_size+1)*sizeof(char));
printf("Enter key to get its hashed value\n");
scanf("%s",k);
int hash=0;
printf("Hashed Value of the key \t%s\t is\t%d\n",k,h(k));
break;
case 5:
if(!ht){
printf("First create empty table\n");
break;
}
if(ht){
for(ch=0;ch<table_size;ch++)
{
if(ht[ch].el!=NULL)
{
if(ht[ch].el->key!=NULL)
free(ht[ch].el->key);
if(ht[ch].el->value!=NULL)
free(ht[ch].el->value);
ht[ch].el=NULL;
}
}
ht=NULL;
}
if(ht){
printf("Error deleting table,Try again...\n");
break;
}else{
elem_count=0;
table_size=0;
printf("Table deleted\n");
break;
}
case 6:
if(!ht){
printf("First create empty table\n");
break;
}
print_key_value_pairs();
break;
case 7:
if(!ht){
printf("First create empty table\n");
break;
}
/*printf("Enter the maximum size of key to be deleted\n");
scanf("%d",&k_size);*/
k=(char*)malloc((k_size+1)*sizeof(char));
printf("Enter key to be deleted for element\n");
scanf("%s",k);
delete_elem(k);
break;
default:
printf("Exiting.\n");
return 0;
}
}while(true);
return 0;
}