hash_item* populateHashtable(char filename[])
{
FILE *fp = fopen(file, "r");
printf("file opened!!\n");
if(fp == NULL) {
printf("invalid file name\n");
exit(0);
}
int cost, id, i = 0;
char code[6];
char ch;
int lines = 0;
while(!feof(fp))
{
ch = fgetc(fp);
if(ch == '\n')
{
lines++;
}
}
rewind(fp);
while(i < lines) {
fscanf(fp, "%d", &id);
fscanf(fp, "%s", code);
fscanf(fp, "%d", &cost);
i++;
insertHashtable(ht, 10, id, code,cost);
}
fclose(fp);
}
Hash_item * populateHashtable( char * filename){
Hash_item* table1=(Hash_item*) malloc(sizeof(Hash_id)*T_SIZE);
memset(table1->table,0,sizeof(table1->table));
FILE* fp= fopen(filename,"r");
int cid,price;
char item[20];
while(fscanf(fp,"%d %s %d",&cid,item,&price)!=EOF){
insertHashtable(table1,T_SIZE,cid,item,price);
}
return table1;
}
void populateHashtable(char filename[])
{
FILE *fp;
fp = fopen(filename,"r+");
int cust_id,cost_item;
char *item_code = (char*)malloc(sizeof(char)*10);
while(!feof(fp))
{
fscanf(fp, "%d %s %d",&cust_id,item_code,&cost_item);
//printf("%d %s %d\n",cust_id,item_code,cost_item);
//no error till here.
insertHashtable(SIZE,cust_id,item_code,cost_item);
}
fclose(fp);
}
static int reHashTable(Hashtable* hashTable){
int i;
HashElement** _oldElements=NULL;
if(hashTable->size == hashTable->capacity){
int oldCapacity=hashTable->capacity;
int newCapacity = hashTable->capacity * 2;
if(newCapacity == 0)
newCapacity = hashTable->factor;
_oldElements = hashTable->elements;
hashTable->elements = (HashElement**)malloc(sizeof(HashElement*) * newCapacity);
if(!hashTable->elements){
hashTable->elements = _oldElements;
return 0;
}
memset(hashTable->elements,'\0',sizeof(HashElement*) * newCapacity);
hashTable->capacity = newCapacity;
hashTable->size = 0;
for(i=0;i<oldCapacity;i++){
HashElement* element = _oldElements[i];
while(element){
HashElement* tempElement;
insertHashtable(hashTable,element->key,element->value);
tempElement=element;
element = element->next;
free(tempElement);
}
}
if(hashTable->freeFunc){
}
else{
free(_oldElements);
}
}
return 1;
}
