void main()
{
int bloom[20],i,k,l=20,n,m,a[20],h1,h2,b[20];
printf("Enter the number of terms to insert:\n");
scanf("%d",&m);
printf("Enter %d values to insert:\n",m);
for(i=0;i<m;i++)
scanf("%d",&a[i]);
for(i=0;i<l;i++)
bloom[i]=0;
for(i=0;i<m;i++)
{
k=a[i];
h1=hash1(k,l);
h2=hash2(k,l);
bloom[h1]=1;
bloom[h2]=1;
}
printf("Enter the number of terms to search:\n");
scanf("%d",&n);
printf("Enter %d values to search:\n",n);
for(i=0;i<n;i++)
scanf("%d",&b[i]);
for(i=0;i<n;i++)
{
k=b[i];
h1=hash1(k,l);
h2=hash2(k,l);
bfilter(bloom,h1,h2,k);
}
}
int checkUniqueness(char *url){
int index, index2;
index = hash1(url)%(MAX_URL_LENGTH);
// printf("url being considered: %s\n", url);
// printf("index: %d\n",index);
if(dict->hash[index] == NULL){ // if there are no DNODES in the hash table at the gievn index, it is unique
// printf("UNIQUE\n");
return 1;
} else {
DNODE *c = dict->hash[index]; // search through collision cluster (DNODES at the same hash index
while(c != NULL){ // while still in the DNODE list
// printf("CHECKING %s with %s\n", url, c->key);
index2 = hash1(c->key)%(MAX_URL_LENGTH); // rehash next DNODE to test if still in collision cluster
if(index != index2){ // exit if you've checked all DNODES in the cluster
// printf("UNIQUE\n");
// printf(")
return 1;
}
if(strcmp(url, c->key) == 0){ // if url is in current, it is not unique
// printf("NOT UNIQUE\n");
return 0;
} else { // go to next DNODE to check
c = c->next;
}
}
}
// printf("UNIQUE BY DEFAULLT\n");
return 1; // if get to end of list and haven't found
}
// Test case: TestLookUp:1
// This test calls lookUp() for the condition where
// the query has an OR operator.
int TestLookUp1() {
START_TEST_CASE;
INVERTED_INDEX* testIndex = NULL;
int wordHash;
int wordHash2;
testIndex = initStructure(testIndex);
wordHash = hash1("dog") % MAX_NUMBER_OF_SLOTS;
DocumentNode* docNode = NULL;
docNode = newDocNode(docNode, 15, 1);
WordNode* wordNode = NULL;
wordNode = newWordNode(wordNode, docNode, "dog");
testIndex->hash[wordHash] = wordNode;
wordHash2 = hash1("cat") % MAX_NUMBER_OF_SLOTS;
DocumentNode* docNode2 = NULL;
docNode2 = newDocNode(docNode2, 20, 2);
WordNode* wordNode2 = NULL;
wordNode2 = newWordNode(wordNode2, docNode2, "cat");
testIndex->hash[wordHash2] = wordNode2;
char query[1000] = "dog OR cat";
sanitize(query);
char* temp[1000];
BZERO(temp, 1000);
char* queryList[2];
BZERO(queryList, 2);
curateWords(queryList, query);
SHOULD_BE(strcmp(queryList[0],"dog") == 0);
SHOULD_BE(strcmp(queryList[1],"OR") == 0);
SHOULD_BE(strcmp(queryList[2],"cat") == 0);
DocumentNode* saved[1000];
BZERO(saved, 1000);
lookUp(saved, queryList, testIndex);
SHOULD_BE(saved[0]->document_id == docNode->document_id);
SHOULD_BE(saved[0]->page_word_frequency == docNode->page_word_frequency);
SHOULD_BE(saved[1]->document_id == docNode2->document_id);
SHOULD_BE(saved[1]->page_word_frequency == docNode2->page_word_frequency);
cleanUpList(saved);
cleanUpQueryList(queryList);
BZERO(saved, 1000);
cleanUpIndex(testIndex);
END_TEST_CASE;
}
void insertHashtable(Hash_item* table1, int htsize, int cid, char *item, int price){
static int cnt=0;
int idx=hash1(item,htsize);
int idx2=hash2(cid,CSIZE);
node* newNode= (node*) malloc(sizeof(node));
newNode->cust_id=cid;
newNode->item_cost=price;
strcpy(newNode->item_code,item);
newNode->next=NULL;
if(table1->table[idx])
{
if((table1->table[idx])->table[idx2])
{
node* temp= table1->table[idx]->table[idx2];
table1->table[idx]->table[idx2]=newNode;
newNode->next=temp;
}
else
{
table1->table[idx]->table[idx2]=newNode;
}
}
else
{
table1->table[idx]=(Hash_id*) malloc(sizeof(Hash_id));
memset(table1->table[idx]->table,0,sizeof(table1->table[idx]->table));
table1->table[idx]->table[idx2]=newNode;
newNode->next=NULL;
}
}
BOOLEAN EnvWriteRetrieve(OBJECT env, FILE_NUM fnum, int *offset, int *lnum)
{ unsigned int pos; OBJECT link, y, z;
debug2(DET, DD, "EnvWriteRetrieve(env %d, %s)", (int) env, FileName(fnum));
debug1(DET, DDD, " %s", EchoObject(env));
stat_writes++;
hash1(pos, env, fnum);
if( tab[pos] != nilobj )
{
for( link = Down(tab[pos]); link != tab[pos]; link = NextDown(link) )
{ Child(y, link);
Child(z, Down(y));
if( env_fnum(y) == fnum && z == env && !env_read(y) )
{ MoveLink(LastUp(y), env_cache, PARENT);
*offset = env_offset(y);
*lnum = env_lnum(y);
stat_write_hits++;
debug2(DET, DD, "EnvWriteRetrieve returning TRUE (offset %d, lnum %d)",
*offset, *lnum);
return TRUE;
}
}
}
debug0(DET, DD, "EnvWriteRetrieve returning FALSE");
return FALSE;
} /* end EnvWriteRetrieve */
void BloomFilter::del(const Key& key) {
countDelete++;
////////////// Write your code below ////////////////////////
unsigned long hash_out_1 = hash1(key);
unsigned long hash_out_2 = hash2(key);
}
int findEntry(int htsize,int cust_id, char* item_code)
{
int key1 = hash1(item_code,htsize);
int key2 = hash2(cust_id,htsize);
Item *temp = Ht[key1]->Hid[key2]->Head;
if(temp!=NULL)
{
while(temp!=NULL)
{
if(strcmp(temp->item_code,item_code) == 0 && temp->cust_id == cust_id)
{
return temp->cost_item;
}
else
{
temp = temp->next;
}
}
return -1;
}
else
return -1;
}
Hash_item * populateHashTable(char *filename)
{
Hash_item *ht;
Node node;
SIZE_T = 100;
ht = malloc(sizeof(Hash_item )*SIZE_T);
int h1,h2,i,j;
FILE *fp;
char c[9];
fp = fopen(filename,"r");
while(!feof(fp))
{
fscanf(fp,"%d %s %d",&i,c,&j);
node.cust_id = i;
strcpy(node.item_code,c);
node.item_cost = j;
h1 = hash1(node.item_code,SIZE_T);
h2 = hash2(node.cust_id,20);
if(ht[h1].CSIZE!=20)
{
ht[h1].CSIZE = 20;
ht[h1].hashId = malloc(sizeof(Hash_id)*20);
}
ht[h1].hashId[h2]=node;
}
return ht;
}
int hash(int key, int i, int M){
int address;
address = (hash1(key, M) + i * hash2(key, M)) % M;
return address;
}
void EnvWriteInsert(OBJECT env, FILE_NUM fnum, int offset, int lnum)
{ unsigned int pos; OBJECT loser, x;
debug3(DET, DD, "EnvWriteInsert(env %d, %s, %d)", (int) env,
FileName(fnum), offset);
/* to limit the cache size, remove least recently used entry if full */
if( cache_count >= MAX_CACHE )
{
Child(loser, Down(env_cache));
DeleteLink(Up(loser));
DisposeChild(Up(loser));
cache_count--;
}
/* insert the new entry */
hash1(pos, env, fnum);
if( tab[pos] == nilobj ) New(tab[pos], ACAT);
New(x, ACAT);
env_fnum(x) = fnum;
env_offset(x) = offset;
env_lnum(x) = lnum;
env_read(x) = FALSE;
Link(tab[pos], x);
Link(env_cache, x);
Link(x, env);
cache_count++;
debug1(DET, DD, "EnvWriteInsert returning (cache_count = %d)", cache_count);
} /* end EnvWriteInsert */
void v_macro(char *str, MNEMONIC *dummy)
{
STRLIST *base;
int defined = 0;
STRLIST **slp, *sl;
MACRO *mac; /* slp, mac: might be used uninitialised */
MNEMONIC *mne;
unsigned int i;
char buf[MAXLINE];
int skipit = !(Ifstack->xtrue && Ifstack->acctrue);
strlower(str);
if (skipit) {
defined = 1;
} else {
defined = (findmne(str) != NULL);
if (F_listfile && ListMode)
outlistfile("");
}
if (!defined) {
base = NULL;
slp = &base;
mac = (MACRO *)permalloc(sizeof(MACRO));
i = hash1(str);
mac->next = (MACRO *)MHash[i];
mac->vect = v_execmac;
mac->name = strcpy(permalloc(strlen(str)+1), str);
mac->flags = MF_MACRO;
MHash[i] = (MNEMONIC *)mac;
}
while (fgets(buf, MAXLINE, pIncfile->fi)) {
const char *comment;
if (Xdebug)
printf("%08lx %s\n", (unsigned long) pIncfile, buf);
++pIncfile->lineno;
comment = cleanup(buf, true);
mne = parse(buf);
if (Av[1][0]) {
if (mne && mne->flags & MF_ENDM) {
if (!defined)
mac->strlist = base;
return;
}
}
if (!skipit && F_listfile && ListMode)
outlistfile(comment);
if (!defined) {
sl = (STRLIST *)permalloc(STRLISTSIZE+1+strlen(buf));
strcpy(sl->buf, buf);
*slp = sl;
slp = &sl->next;
}
}
asmerr( ERROR_PREMATURE_EOF, true, NULL );
}
static void
make_forward_references_hash1(void) {
int n;
init_hash_table();
/* set up the forward references using the last_index hash table */
for (n = 0; n < Number_Of_Texts; n++) {
struct text *txt = &Text[n];
size_t j;
for ( /* all pos'ns in txt except the last Min_Run_Size-1 */
j = txt->tx_start; /* >= 1 */
j + Min_Run_Size - 1 < txt->tx_limit;
j++
) {
if (May_Be_Start_Of_Run(Token_Array[j])) {
size_t h = hash1(&Token_Array[j]);
if (last_index[h]) {
forward_reference[last_index[h]] = j;
}
last_index[h] = j;
}
}
}
Free((char *)last_index);
#ifdef DB_FORW_REF
db_forward_references("first hashing");
#endif /* DB_FORW_REF */
}
// inserts a page (DocumentNode) into the index
int findWordData(char* word, char** list, INVERTED_INDEX* index) {
int hashIndex = hash1(word)%MAX_HASH_SLOT;
int pos = 0;
// something is in there already
if (((index->hash[hashIndex]) != NULL) && (!strcmp(word,(index->hash[hashIndex])->word))) {
WordNode* node = index->hash[hashIndex];
// printf("\nThe following word is present: %s\n", word);
DocumentNode* d;
d = node->page;
while (d != NULL) {
list[pos] = (char*)malloc(sizeof(char)*1000);
BZERO(list[pos], 1000);
int id = d->document_id;
int freq = d->page_word_frequency;
sprintf(list[pos], "%d %d ", id, freq);
// printf("%d: %s\n", pos, list[pos]);
d = d->next;
pos++;
}
return(1);
}
// nothing is in there already
else {
printf("\nNo results found for the following word: %s\n", word);
return(0);
}
}
insertHashtable(hash_item ht, int htsize, int cust_id, char *item_code, int cost_item)
{
int h1 = hash1(item_code, htsize);
int h2 = hash2(cust_id, htsize);
Hash_id hi = ht.HT_id[h1];
node* n = hi[h2];
add(n, cust_id, item_code, cost_item);
}
int insertDict(char* word, int pagenum){
int hash_val=hash1(word)%MAX_HASH_SLOT;
DNODE* findnode=dict->hash[hash_val];
while(findnode){
if((hash1(findnode->key)%MAX_HASH_SLOT)!=hash_val)
break;
//find the node
if(strcmp(findnode->key,word)==0)
return insertDocNode(findnode,pagenum);
findnode=findnode->next;
}
//The word not currently in the Dict
DNODE* rv=insertWordNode(word,hash_val,findnode);
return insertDocNode(rv,pagenum);
}
// tweaked version of update index to insert an element into the index along with with the frequency
int insertElementIntoIndex(char* word, int documentId, int frequency, INVERTED_INDEX* index) {
int hashIndex = hash1(word)%MAX_HASH_SLOT;
// something is in there already
if ((index->hash[hashIndex]) != NULL) {
DocumentNode* init;
init = (index->hash[hashIndex])->page;
if(init->document_id == documentId) {
init->page_word_frequency = frequency;
(index->hash[hashIndex])->page = init;
}
else {
DocumentNode* d;
if(index->hash[hashIndex]) {
int flag = 0;
d = (index->hash[hashIndex])->page;
while ((d->next) != NULL) {
d = d->next;
if(d->document_id == documentId) {
//we found the same documentId
d->page_word_frequency = frequency;
flag = 1;
break;
}
}
if (flag == 0) {
// documentId not present
DocumentNode* dd = (DocumentNode*)malloc(sizeof(DocumentNode));
MALLOC_CHECK(dd);
dd->next = NULL;
dd->document_id = documentId;
dd->page_word_frequency = frequency;
if (d->next == NULL) {
d->next = dd;
}
}
}
}
return 1;
}
// nothing is in there already
else {
DocumentNode* doc = malloc(sizeof(DocumentNode));
MALLOC_CHECK(doc);
doc->document_id = documentId;
doc->page_word_frequency = frequency;
doc->next = NULL;
// add element into the index
IndexAdd(index, (void*)doc, word);
return 1;
}
}
static int file_hash(void *key)
{
cm_handle_t f1 = (cm_handle_t ) key;
int hash_value = 0, i;
char *name = ((struct handle *)f1)->name;
for (i = 0; i < strlen(name); i++) {
hash_value += abs(hash1(name[i]));
}
return hash_value;
}
bool BloomFilter::exist(const Key& key) {
countFind++;
////////////// Write your code below ////////////////////////
unsigned long hash_out_1 = hash1(key);
unsigned long hash_out_2 = hash2(key);
if (m_tickBook.at(hash_out_1) == 1) {
return true;
}
return false; //you have to replace this line with your own.
}
void BloomFilter::add(const Key& key) {
countAdd++;
unsigned long hash_out_1 = hash1(key);
unsigned long hash_out_2 = hash2(key);
unsigned long hash_at_1 = m_tickBook.at(hash_out_1);
unsigned long hash_at_2 = m_tickBook.at(hash_out_1);
m_tickBook.at(hash_at_1);
}
void DoubleHashDict::rehash() {
// 221 Students: DO NOT CHANGE OR DELETE THE NEXT FEW LINES!!!
// And leave this at the beginning of the rehash() function.
// We will use this code when marking to be able to watch what
// your program is doing, so if you change things, we'll mark it wrong.
#ifdef MARKING_TRACE
std::cout << "*** REHASHING " << size;
#endif
// End of "DO NOT CHANGE" Block
// TODO: [done] Your code goes here...
std::cout << "rehash" << std::endl;
// Keep a pointer to the old table.
bucket *old = table;
int x = size;
// Get a bigger table
if (primes[1 + size_index] == -1)
return;
size = primes[++size_index];
table = new bucket[size]();
// Rehash all the data over
int h, o;
for (int i = 0; i < x; ++i) {
if (old[i].key != 0) {
// need to add it to new table
h = hash1(old[i].key->getUniqId());
o = hash2(old[i].key->getUniqId());
for (int j = 0; j < size; ++j) {
if (table[(h + (o * j) % size) % size].key == 0) {
table[(h + (o * j) % size) % size].key = old[i].key;
table[(h + (o * j) % size) % size].data = old[i].data;
break;
}
}
}
}
delete[] old;
// No need to delete the data, as all copied into new table.
// 221 Students: DO NOT CHANGE OR DELETE THE NEXT FEW LINES!!!
// And leave this at the end of the rehash() function.
// We will use this code when marking to be able to watch what
// your program is doing, so if you change things, we'll mark it wrong.
#ifdef MARKING_TRACE
std::cout << " to " << size << " ***\n";
#endif
// End of "DO NOT CHANGE" Block
}
int checkUniqueness(char *word, INVERTED_INDEX *index) {
int hashIndex, hashIndex2;
hashIndex = hash1(word)%(MAX_WORD_LEN);
if(index->hash[hashIndex] == NULL) { // if there are no DNODES in the hash table at the gievn index, it is unique
return 1;
} else {
WORDNODE *c = index->hash[hashIndex]; // search through collision cluster (DNODES at the same hash index
while(c != NULL) { // while still in the DNODE list
hashIndex2 = hash1(c->word)%(MAX_WORD_LEN); // rehash next DNODE to test if still in collision cluster
if(hashIndex != hashIndex2) { // exit if you've checked all DNODES in the cluster
return 1;
}
if(strcmp(word, c->word) == 0) { // if url is in current, it is not unique
return 0;
} else { // go to next DNODE to check
c = c->next;
}
}
}
return 1; // if get to end of list and haven't found
}
DNODE* findNode(char* word){
int hash_val=hash1(word)%MAX_HASH_SLOT;
DNODE* findnode=dict->hash[hash_val];
while(findnode){
//find the node
if(strcmp(findnode->key,word)==0)
return findnode;
findnode=findnode->next;
}
return 0;
}
bool BloomFilter::exist(const Key& key) {
countFind++;
unsigned long v1 = hash1(key);
unsigned long v2 = hash2(key);
int p1 = v1/m_pocketSize;
int p2 = v2/m_pocketSize;
unsigned long address1 = 1<<(v1 % m_pocketSize);
unsigned long address2 = 1<<(v2 % m_pocketSize);
return (m_tickBook[p1] & (address1)) && (m_tickBook[p2] & (address2));
}
void brute_hash1(){
//uint8_t csn[8] = {0,0,0,0,0xf7,0xff,0x12,0xe0};
uint8_t k[8]= {0,0,0,0,0,0,0,0};
uint16_t a,b,c,d;
//uint8_t testcsn[8] ={0x00,0x0d,0x0f,0xfd,0xf7,0xff,0x12,0xe0} ;
uint8_t csn[8] = {0x04,0x0f,0x0f,0xf7,0xf7,0xff,0x12,0xe0};
//uint8_t testkey2[8] = {0};
hash1(csn, k);
printf("CSN\t%02x%02x%02x%02x%02x%02x%02x%02x\t%02x %02x %02x %02x %02x %02x %02x %02x\t"
,csn[0],csn[1],csn[2],csn[3],csn[4],csn[5],csn[6],csn[7]
,k[0],k[1],k[2],k[3],k[4],k[5],k[6],k[7]
);
//uint8_t testkey[8] ={0x05 ,0x01 ,0x00 ,0x10 ,0x45 ,0x08 ,0x45,0x56} ;
calc_score(csn,k);
printf("Brute forcing hashones\n");
//exit(1);
for(a=0;a < 256;a++)
{
//if(a > 0)printf("%d/256 done...\n", a);
for(b=0;b < 256 ; b++)
for(c=0;c < 256;c++)
for(d=0;d < 256;d++)
{
csn[0] = a;
csn[1] = b;
csn[2] = c;
csn[3] = d;
csn[4] = 0xf7;
csn[5] = 0xff;
csn[6] = 0x12;
csn[7] = 0xe0;
hash1(csn, k);
calc_score(csn,k);
}
}
}
int findEntry(Hash_item ht, int htsize, int cust_id, char *item_code){
// This function searches for an entry corresponding to customer's id, cust_id, and item_code. This function returns the cost of the item purchased by the customer if found; else it returns -1.
int idx=hash1(item_code,T_SIZE);
int idx2=hash2(cust_id,CSIZE);
node* temp=ht.table[idx]->table[idx2];
while(temp)
{
if(temp->cust_id==cust_id && strcmp(temp->item_code,item_code)==0)
{
return temp->item_cost;
}
temp=temp->next;
}
return -1;
}
void VMACTest::CompareAccess(std::vector<byte> &Key, std::vector<byte> &Iv)
{
std::vector<byte> hash1(20);
CEX::Mac::VMAC mac;
mac.Initialize(Key, Iv);
mac.BlockUpdate(m_input, 0, m_input.size());
mac.DoFinal(hash1, 0);
std::vector<byte> hash2(20);
mac.ComputeMac(m_input, hash2);
if (hash1 != hash2)
throw std::string("VMACTest: hash is not equal!");
}
static hashmapEntry* find(const hashmap* map, const char* key)
{
unsigned long index, step, initialIndex;
hashmapEntry* freeEntry = 0;
initialIndex = index = hash1(key) & map->size;
/* first try */
if (map->array[index].key)
{
if (!strcmp(map->array[index].key, key))
return &map->array[index];
}
else if (!map->array[index].data)
{
return &map->array[index];
}
else
{
freeEntry = &map->array[index];
}
/* collision */
step = (hash2(key) % map->size) + 1;
do
{
index = (index + step) & map->size;
if (map->array[index].key)
{
if (!strcmp(map->array[index].key, key))
return &map->array[index];
}
else if (!map->array[index].data)
{
return (freeEntry) ? freeEntry : &map->array[index];
}
else if (!freeEntry)
{
freeEntry = &map->array[index];
}
}
while (index != initialIndex);
return freeEntry;
}
void addhashtable(MNEMONIC *mne)
{
int i, j;
unsigned int opcode[NUMOC];
for (; mne->vect; ++mne) {
memcpy(opcode, mne->opcode, sizeof(mne->opcode));
for (i = j = 0; i < NUMOC; ++i) {
mne->opcode[i] = 0; /* not really needed */
if (mne->okmask & (1L << i))
mne->opcode[i] = opcode[j++];
}
i = hash1(mne->name);
mne->next = MHash[i];
MHash[i] = mne;
}
}
void hash(int array[],int hashtable[])
{
int i,first,second,count,off;
int left = 0;
for ( i = 0; i < 120; ++i)
{
first = hash1(array[i]);
if(hashtable[first]==-1)
{
hashtable[first] = array[i];
printf("the first hashed index for %d is %d\n",array[i],first);
}
else
{
printf("occupied by %d\n",hashtable[first] );
count = 0;
second = first;
off = offset(array[i]);
while(count<25)
{
second = second + off;
if (second>172)
second -= 173;
if (hashtable[second]==-1)
{
hashtable[second] = array[i];
break;
}
else
count++;
}
if (count>=25)//no space found
{
left++;
printf("no space found for %d\n",array[i]);
}
else
printf("hashed %d at %d in %d th attempt\n",array[i],second,count+1);
}
}
printf("\nleft are %d \n",left);
}
void BloomFilter::del(const Key& key) {
countDelete++;
unsigned long v1 = hash1(key);
unsigned long v2 = hash2(key);
unsigned int p1 = v1/m_pocketSize;
unsigned int p2 = v2/m_pocketSize;
unsigned long address1 = 1<<(v1 % m_pocketSize);
unsigned long address2 = 1<<(v2 % m_pocketSize);
m_tickBook[p1] &= ~address1;
m_tickBook[p2] &= ~address2;
}