129 lines
3.3 KiB
C
129 lines
3.3 KiB
C
#include "ht.h"
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
|
|
unsigned int ht_default_hash_func(void* data){
|
|
const unsigned int fnv_prime = 16777619;
|
|
const unsigned int fnv_offset_basis = 2166136261;
|
|
unsigned int hash;
|
|
char* string;
|
|
hash = fnv_offset_basis;
|
|
string = data;
|
|
while (*string) {
|
|
hash = hash * fnv_prime;
|
|
hash = hash ^ (*(string++));
|
|
}
|
|
return hash;
|
|
}
|
|
int ht_default_cmp_func(void* a, void* b){
|
|
return strcmp(a, b) == 0;
|
|
}
|
|
void* ht_default_copy_func(void* from) {
|
|
void* copy = malloc(sizeof(char) * (strlen(from) + 1));
|
|
if(copy) {
|
|
strcpy(copy, from);
|
|
}
|
|
return copy;
|
|
}
|
|
void ht_default_free_func(void* data){
|
|
free(data);
|
|
}
|
|
|
|
void ht_init(ht* ht){
|
|
ht->cmp_func = ht_default_cmp_func;
|
|
ht->copy_func = ht_default_copy_func;
|
|
ht->free_func = ht_default_free_func;
|
|
ht->hash_func = ht_default_hash_func;
|
|
memset(ht->data, 0, sizeof(ht->data));
|
|
}
|
|
void ht_free(ht* ht){
|
|
int index = 0;
|
|
for(; index < LIBDS_HT_SIZE; index++){
|
|
ht_node* head = ht->data[index];
|
|
while(head){
|
|
ht_node* to_delete = head;
|
|
head = head->next;
|
|
ht->free_func(to_delete->key);
|
|
free(to_delete);
|
|
}
|
|
}
|
|
}
|
|
|
|
libds_result ht_put(ht* ht, void* key, void* data){
|
|
libds_result result = SUCCESS;
|
|
ht_node* new_node = NULL;
|
|
unsigned int key_int = ht->hash_func(key) % LIBDS_HT_SIZE;
|
|
|
|
|
|
new_node = malloc(sizeof(*new_node));
|
|
if(new_node) {
|
|
new_node->data = data;
|
|
new_node->key = ht->copy_func(key);
|
|
if(new_node->key == NULL){
|
|
result = MALLOC;
|
|
}
|
|
} else {
|
|
result = MALLOC;
|
|
}
|
|
|
|
if(result != SUCCESS) {
|
|
if(new_node) {
|
|
free(new_node);
|
|
new_node = NULL;
|
|
}
|
|
} else {
|
|
new_node->next = ht->data[key_int];
|
|
ht->data[key_int] = new_node;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
void* ht_get(ht* ht, void* key) {
|
|
void* data = NULL;
|
|
ht_node* search_node;
|
|
unsigned int key_int = ht->hash_func(key) % LIBDS_HT_SIZE;
|
|
|
|
search_node = ht->data[key_int];
|
|
while(search_node && data == NULL){
|
|
if(ht->cmp_func(search_node->key, key)) {
|
|
data = search_node->data;
|
|
}
|
|
search_node = search_node->next;
|
|
}
|
|
|
|
return data;
|
|
}
|
|
void ht_remove(ht* ht, void* key){
|
|
ht_node** search_ptr;
|
|
unsigned int key_int = ht->hash_func(key) % LIBDS_HT_SIZE;
|
|
|
|
search_ptr = &ht->data[key_int];
|
|
while(*search_ptr){
|
|
if(ht->cmp_func((*search_ptr)->key, key)){
|
|
ht_node* to_delete = *search_ptr;
|
|
*search_ptr = (*search_ptr)->next;
|
|
ht->free_func(to_delete->key);
|
|
free(to_delete);
|
|
} else {
|
|
search_ptr = &(*search_ptr)->next;
|
|
}
|
|
}
|
|
}
|
|
|
|
int ht_foreach(ht* ht, void* data, compare_func compare, foreach_func foreach, ...){
|
|
int index = 0;
|
|
int return_code = 0;
|
|
va_list args;
|
|
for(; index < LIBDS_HT_SIZE && return_code == 0; index++){
|
|
ht_node* search_node = ht->data[index];
|
|
while(search_node && return_code == 0){
|
|
if(compare(data, search_node->data)) {
|
|
va_start(args, foreach);
|
|
return_code = foreach(search_node->data, args);
|
|
va_end(args);
|
|
}
|
|
search_node = search_node->next;
|
|
}
|
|
}
|
|
return return_code;
|
|
} |