Worked on hash table initialization

SLS_C/src/hash_table.c

@@ -8,11 +8,49 @@
 #include "sls/hash_table.h"
 #include "sls/string.h"
 
-static size_t next_power_of_two(size_t n);
+static size_t next_power_of_two(size_t n) {
+    if (n < 2) return 2;
+    n--;
+    n |= n >> 1;
+    n |= n >> 2;
+    n |= n >> 4;
+    n |= n >> 8;
+    n |= n >> 16;
+#if SIZE_MAX > UINT32_MAX
+    n |= n >> 32;
+#endif
+    n++;
+    return n;
+}
 
-HashTable *init_hash_table(size_t min_buckets_count);
+HashTable *init_hash_table(size_t min_buckets_count) {
+    HashTable *ht = (HashTable *)malloc(sizeof(HashTable));
+    if (!ht) return NULL;
 
-void del_hash_table(HashTable *ht);
+    ht->buckets_count = next_power_of_two(min_buckets_count);
+
+    ht->buckets = (Bucket **)calloc(ht->buckets_count, sizeof(Bucket *));
+    if (!ht->buckets) {
+        free(ht);
+        return NULL;
+    }
+
+    return ht;
+}
+
+void del_hash_table(HashTable *ht) {
+    for (size_t i = 0; i < ht->buckets_count; i++) {
+        Bucket *next, *head;
+        head = (ht->buckets)+i;
+        while (head) {
+            next = head->next;
+            free(head);
+            head = next;
+        }
+    }
+    free(ht->buckets);
+    free(ht);
+}
 
 static inline uint32_t sls_hash_a(SlsStr key) {
     // FNV-1a