Adding functions table to hashmap and some fixes in bidimap and queue

src/cmc/bidimap.h

@@ -412,7 +412,7 @@ struct cmc_callbacks_bidimap
         if (capacity >= UINTMAX_MAX * load)                                    \
             return NULL;                                                       \
                                                                                \
-        if (!f_val)                                                            \
+        if (!f_key || !f_val)                                                  \
             return NULL;                                                       \
                                                                                \
         size_t real_capacity = PFX##_impl_calculate_size(capacity / load);     \
@@ -461,6 +461,9 @@ struct cmc_callbacks_bidimap
         if (capacity >= UINTMAX_MAX * load)                                    \
             return NULL;                                                       \
                                                                                \
+        if (!f_key || !f_val)                                                  \
+            return NULL;                                                       \
+                                                                               \
         size_t real_capacity = PFX##_impl_calculate_size(capacity / load);     \
                                                                                \
         if (!alloc)                                                            \

src/cmc/queue.h

@@ -504,6 +504,8 @@ struct cmc_callbacks_queue
         }                                                                     \
                                                                               \
         result->count = _queue_->count;                                       \
+        result->front = 0;                                                    \
+        result->back = _queue_->count;                                        \
                                                                               \
         return result;                                                        \
     }                                                                         \