diff --git a/src/include/map.h b/src/include/map.h
index 0734efd..d6db0c4 100644
--- a/src/include/map.h
+++ b/src/include/map.h
@@ -45,6 +45,14 @@ bk_bool map_get(void *value, map me, void *key);
 bk_bool map_contains(map me, void *key);
 bk_bool map_remove(map me, void *key);
 
+/* Retrieval */
+void *map_first(map me);
+void *map_last(map me);
+void *map_lower(map me, void *key);
+void *map_higher(map me, void *key);
+void *map_floor(map me, void *key);
+void *map_ceiling(map me, void *key);
+
 /* Ending */
 void map_clear(map me);
 map map_destroy(map me);
diff --git a/src/include/multimap.h b/src/include/multimap.h
index f233f4f..757d7e8 100644
--- a/src/include/multimap.h
+++ b/src/include/multimap.h
@@ -51,6 +51,14 @@ bk_bool multimap_contains(multimap me, void *key);
 bk_bool multimap_remove(multimap me, void *key, void *value);
 bk_bool multimap_remove_all(multimap me, void *key);
 
+/* Retrieval */
+void *multimap_first(multimap me);
+void *multimap_last(multimap me);
+void *multimap_lower(multimap me, void *key);
+void *multimap_higher(multimap me, void *key);
+void *multimap_floor(multimap me, void *key);
+void *multimap_ceiling(multimap me, void *key);
+
 /* Ending */
 void multimap_clear(multimap me);
 multimap multimap_destroy(multimap me);
diff --git a/src/include/multiset.h b/src/include/multiset.h
index c6bf006..7d1a394 100644
--- a/src/include/multiset.h
+++ b/src/include/multiset.h
@@ -47,6 +47,14 @@ bk_bool multiset_contains(multiset me, void *key);
 bk_bool multiset_remove(multiset me, void *key);
 bk_bool multiset_remove_all(multiset me, void *key);
 
+/* Retrieval */
+void *multiset_first(multiset me);
+void *multiset_last(multiset me);
+void *multiset_lower(multiset me, void *key);
+void *multiset_higher(multiset me, void *key);
+void *multiset_floor(multiset me, void *key);
+void *multiset_ceiling(multiset me, void *key);
+
 /* Ending */
 void multiset_clear(multiset me);
 multiset multiset_destroy(multiset me);
diff --git a/src/include/set.h b/src/include/set.h
index 73758df..8117d85 100644
--- a/src/include/set.h
+++ b/src/include/set.h
@@ -43,6 +43,14 @@ bk_err set_put(set me, void *key);
 bk_bool set_contains(set me, void *key);
 bk_bool set_remove(set me, void *key);
 
+/* Retrieval */
+void *set_first(set me);
+void *set_last(set me);
+void *set_lower(set me, void *key);
+void *set_higher(set me, void *key);
+void *set_floor(set me, void *key);
+void *set_ceiling(set me, void *key);
+
 /* Ending */
 void set_clear(set me);
 set set_destroy(set me);
diff --git a/src/map.c b/src/map.c
index 45d0764..d627577 100644
--- a/src/map.c
+++ b/src/map.c
@@ -721,6 +721,157 @@ bk_bool map_remove(map me, void *const key)
     return BK_TRUE;
 }
 
+/**
+ * Returns the first (lowest) key in this map. The returned key is a pointer to
+ * the internally stored key, which should not be modified. Modifying it results
+ * in undefined behaviour.
+ *
+ * @param me the map to get the key from
+ *
+ * @return the lowest key in this map, or NULL if it is empty
+ */
+void *map_first(map me)
+{
+    char *traverse = me->root;
+    char *traverse_left;
+    if (!traverse) {
+        return NULL;
+    }
+    memcpy(&traverse_left, traverse + node_left_child_offset, ptr_size);
+    while (traverse_left) {
+        traverse = traverse_left;
+        memcpy(&traverse_left, traverse + node_left_child_offset, ptr_size);
+    }
+    return traverse + node_key_offset;
+}
+
+/**
+ * Returns the last (highest) key in this map. The returned key is a pointer to
+ * the internally stored key, which should not be modified. Modifying it results
+ * in undefined behaviour.
+ *
+ * @param me the map to get the key from
+ *
+ * @return the highest key in this map, or NULL if it is empty
+ */
+void *map_last(map me)
+{
+    char *traverse = me->root;
+    char *traverse_right;
+    if (!traverse) {
+        return NULL;
+    }
+    memcpy(&traverse_right, traverse + node_right_child_offset, ptr_size);
+    while (traverse_right) {
+        traverse = traverse_right;
+        memcpy(&traverse_right, traverse + node_right_child_offset, ptr_size);
+    }
+    return traverse + node_key_offset;
+}
+
+/**
+ * Returns the key which is strictly lower than the comparison key. Meaning that
+ * the highest key which is lower than the key used for comparison is returned.
+ *
+ * @param me  the map to get the lower key from
+ * @param key the key to use for comparison
+ *
+ * @return the key which is strictly lower, or NULL if it does not exist
+ */
+void *map_lower(map me, void *const key)
+{
+    char *ret = NULL;
+    char *traverse = me->root;
+    while (traverse) {
+        const int compare = me->comparator(traverse + node_key_offset, key);
+        if (compare < 0) {
+            ret = traverse + node_key_offset;
+            memcpy(&traverse, traverse + node_right_child_offset, ptr_size);
+        } else {
+            memcpy(&traverse, traverse + node_left_child_offset, ptr_size);
+        }
+    }
+    return ret;
+}
+
+/**
+ * Returns the key which is strictly higher than the comparison key. Meaning
+ * that the lowest key which is higher than the key used for comparison is
+ * returned.
+ *
+ * @param me  the map to get the higher key from
+ * @param key the key to use for comparison
+ *
+ * @return the key which is strictly higher, or NULL if it does not exist
+ */
+void *map_higher(map me, void *const key)
+{
+    char *ret = NULL;
+    char *traverse = me->root;
+    while (traverse) {
+        const int compare = me->comparator(traverse + node_key_offset, key);
+        if (compare > 0) {
+            ret = traverse + node_key_offset;
+            memcpy(&traverse, traverse + node_left_child_offset, ptr_size);
+        } else {
+            memcpy(&traverse, traverse + node_right_child_offset, ptr_size);
+        }
+    }
+    return ret;
+}
+
+/**
+ * Returns the key which is the floor of the comparison key. Meaning that the
+ * the highest key which is lower or equal to the key used for comparison is
+ * returned.
+ *
+ * @param me  the map to get the floor key from
+ * @param key the key to use for comparison
+ *
+ * @return the key which is the floor, or NULL if it does not exist
+ */
+void *map_floor(map me, void *const key)
+{
+    char *ret = NULL;
+    char *traverse = me->root;
+    while (traverse) {
+        const int compare = me->comparator(traverse + node_key_offset, key);
+        if (compare <= 0) {
+            ret = traverse + node_key_offset;
+            memcpy(&traverse, traverse + node_right_child_offset, ptr_size);
+        } else {
+            memcpy(&traverse, traverse + node_left_child_offset, ptr_size);
+        }
+    }
+    return ret;
+}
+
+/**
+ * Returns the key which is the ceiling of the comparison key. Meaning that the
+ * the lowest key which is higher or equal to the key used for comparison is
+ * returned.
+ *
+ * @param me  the map to get the ceiling key from
+ * @param key the key to use for comparison
+ *
+ * @return the key which is the ceiling, or NULL if it does not exist
+ */
+void *map_ceiling(map me, void *const key)
+{
+    char *ret = NULL;
+    char *traverse = me->root;
+    while (traverse) {
+        const int compare = me->comparator(traverse + node_key_offset, key);
+        if (compare >= 0) {
+            ret = traverse + node_key_offset;
+            memcpy(&traverse, traverse + node_left_child_offset, ptr_size);
+        } else {
+            memcpy(&traverse, traverse + node_right_child_offset, ptr_size);
+        }
+    }
+    return ret;
+}
+
 /**
  * Clears the key-value pairs from the map.
  *
diff --git a/src/multimap.c b/src/multimap.c
index bf77c51..52cc00b 100644
--- a/src/multimap.c
+++ b/src/multimap.c
@@ -910,6 +910,157 @@ bk_bool multimap_remove_all(multimap me, void *const key)
     return BK_TRUE;
 }
 
+/**
+ * Returns the first (lowest) key in this multi-map. The returned key is a
+ * pointer to the internally stored key, which should not be modified. Modifying
+ * it results in undefined behaviour.
+ *
+ * @param me the multi-map to get the key from
+ *
+ * @return the lowest key in this multi-map, or NULL if it is empty
+ */
+void *multimap_first(multimap me)
+{
+    char *traverse = me->root;
+    char *traverse_left;
+    if (!traverse) {
+        return NULL;
+    }
+    memcpy(&traverse_left, traverse + node_left_child_offset, ptr_size);
+    while (traverse_left) {
+        traverse = traverse_left;
+        memcpy(&traverse_left, traverse + node_left_child_offset, ptr_size);
+    }
+    return traverse + node_key_offset;
+}
+
+/**
+ * Returns the last (highest) key in this multi-map. The returned key is a
+ * pointer to the internally stored key, which should not be modified. Modifying
+ * it results in undefined behaviour.
+ *
+ * @param me the multi-map to get the key from
+ *
+ * @return the highest key in this multi-map, or NULL if it is empty
+ */
+void *multimap_last(multimap me)
+{
+    char *traverse = me->root;
+    char *traverse_right;
+    if (!traverse) {
+        return NULL;
+    }
+    memcpy(&traverse_right, traverse + node_right_child_offset, ptr_size);
+    while (traverse_right) {
+        traverse = traverse_right;
+        memcpy(&traverse_right, traverse + node_right_child_offset, ptr_size);
+    }
+    return traverse + node_key_offset;
+}
+
+/**
+ * Returns the key which is strictly lower than the comparison key. Meaning that
+ * the highest key which is lower than the key used for comparison is returned.
+ *
+ * @param me  the multi-map to get the lower key from
+ * @param key the key to use for comparison
+ *
+ * @return the key which is strictly lower, or NULL if it does not exist
+ */
+void *multimap_lower(multimap me, void *const key)
+{
+    char *ret = NULL;
+    char *traverse = me->root;
+    while (traverse) {
+        const int compare = me->key_comparator(traverse + node_key_offset, key);
+        if (compare < 0) {
+            ret = traverse + node_key_offset;
+            memcpy(&traverse, traverse + node_right_child_offset, ptr_size);
+        } else {
+            memcpy(&traverse, traverse + node_left_child_offset, ptr_size);
+        }
+    }
+    return ret;
+}
+
+/**
+ * Returns the key which is strictly higher than the comparison key. Meaning
+ * that the lowest key which is higher than the key used for comparison is
+ * returned.
+ *
+ * @param me  the multi-map to get the higher key from
+ * @param key the key to use for comparison
+ *
+ * @return the key which is strictly higher, or NULL if it does not exist
+ */
+void *multimap_higher(multimap me, void *const key)
+{
+    char *ret = NULL;
+    char *traverse = me->root;
+    while (traverse) {
+        const int compare = me->key_comparator(traverse + node_key_offset, key);
+        if (compare > 0) {
+            ret = traverse + node_key_offset;
+            memcpy(&traverse, traverse + node_left_child_offset, ptr_size);
+        } else {
+            memcpy(&traverse, traverse + node_right_child_offset, ptr_size);
+        }
+    }
+    return ret;
+}
+
+/**
+ * Returns the key which is the floor of the comparison key. Meaning that the
+ * the highest key which is lower or equal to the key used for comparison is
+ * returned.
+ *
+ * @param me  the multi-map to get the floor key from
+ * @param key the key to use for comparison
+ *
+ * @return the key which is the floor, or NULL if it does not exist
+ */
+void *multimap_floor(multimap me, void *const key)
+{
+    char *ret = NULL;
+    char *traverse = me->root;
+    while (traverse) {
+        const int compare = me->key_comparator(traverse + node_key_offset, key);
+        if (compare <= 0) {
+            ret = traverse + node_key_offset;
+            memcpy(&traverse, traverse + node_right_child_offset, ptr_size);
+        } else {
+            memcpy(&traverse, traverse + node_left_child_offset, ptr_size);
+        }
+    }
+    return ret;
+}
+
+/**
+ * Returns the key which is the ceiling of the comparison key. Meaning that the
+ * the lowest key which is higher or equal to the key used for comparison is
+ * returned.
+ *
+ * @param me  the multi-map to get the ceiling key from
+ * @param key the key to use for comparison
+ *
+ * @return the key which is the ceiling, or NULL if it does not exist
+ */
+void *multimap_ceiling(multimap me, void *const key)
+{
+    char *ret = NULL;
+    char *traverse = me->root;
+    while (traverse) {
+        const int compare = me->key_comparator(traverse + node_key_offset, key);
+        if (compare >= 0) {
+            ret = traverse + node_key_offset;
+            memcpy(&traverse, traverse + node_left_child_offset, ptr_size);
+        } else {
+            memcpy(&traverse, traverse + node_right_child_offset, ptr_size);
+        }
+    }
+    return ret;
+}
+
 /**
  * Clears the key-value pairs from the multi-map.
  *
diff --git a/src/multiset.c b/src/multiset.c
index 401de75..0f22e10 100644
--- a/src/multiset.c
+++ b/src/multiset.c
@@ -763,6 +763,157 @@ bk_bool multiset_remove_all(multiset me, void *const key)
     return BK_TRUE;
 }
 
+/**
+ * Returns the first (lowest) key in this multi-set. The returned key is a
+ * pointer to the internally stored key, which should not be modified. Modifying
+ * it results in undefined behaviour.
+ *
+ * @param me the multi-set to get the key from
+ *
+ * @return the lowest key in this multi-set, or NULL if it is empty
+ */
+void *multiset_first(multiset me)
+{
+    char *traverse = me->root;
+    char *traverse_left;
+    if (!traverse) {
+        return NULL;
+    }
+    memcpy(&traverse_left, traverse + node_left_child_offset, ptr_size);
+    while (traverse_left) {
+        traverse = traverse_left;
+        memcpy(&traverse_left, traverse + node_left_child_offset, ptr_size);
+    }
+    return traverse + node_key_offset;
+}
+
+/**
+ * Returns the last (highest) key in this multi-set. The returned key is a
+ * pointer to the internally stored key, which should not be modified. Modifying
+ * it results in undefined behaviour.
+ *
+ * @param me the multi-set to get the key from
+ *
+ * @return the highest key in this multi-set, or NULL if it is empty
+ */
+void *multiset_last(multiset me)
+{
+    char *traverse = me->root;
+    char *traverse_right;
+    if (!traverse) {
+        return NULL;
+    }
+    memcpy(&traverse_right, traverse + node_right_child_offset, ptr_size);
+    while (traverse_right) {
+        traverse = traverse_right;
+        memcpy(&traverse_right, traverse + node_right_child_offset, ptr_size);
+    }
+    return traverse + node_key_offset;
+}
+
+/**
+ * Returns the key which is strictly lower than the comparison key. Meaning that
+ * the highest key which is lower than the key used for comparison is returned.
+ *
+ * @param me  the multi-set to get the lower key from
+ * @param key the key to use for comparison
+ *
+ * @return the key which is strictly lower, or NULL if it does not exist
+ */
+void *multiset_lower(multiset me, void *const key)
+{
+    char *ret = NULL;
+    char *traverse = me->root;
+    while (traverse) {
+        const int compare = me->comparator(traverse + node_key_offset, key);
+        if (compare < 0) {
+            ret = traverse + node_key_offset;
+            memcpy(&traverse, traverse + node_right_child_offset, ptr_size);
+        } else {
+            memcpy(&traverse, traverse + node_left_child_offset, ptr_size);
+        }
+    }
+    return ret;
+}
+
+/**
+ * Returns the key which is strictly higher than the comparison key. Meaning
+ * that the lowest key which is higher than the key used for comparison is
+ * returned.
+ *
+ * @param me  the multi-set to get the higher key from
+ * @param key the key to use for comparison
+ *
+ * @return the key which is strictly higher, or NULL if it does not exist
+ */
+void *multiset_higher(multiset me, void *const key)
+{
+    char *ret = NULL;
+    char *traverse = me->root;
+    while (traverse) {
+        const int compare = me->comparator(traverse + node_key_offset, key);
+        if (compare > 0) {
+            ret = traverse + node_key_offset;
+            memcpy(&traverse, traverse + node_left_child_offset, ptr_size);
+        } else {
+            memcpy(&traverse, traverse + node_right_child_offset, ptr_size);
+        }
+    }
+    return ret;
+}
+
+/**
+ * Returns the key which is the floor of the comparison key. Meaning that the
+ * the highest key which is lower or equal to the key used for comparison is
+ * returned.
+ *
+ * @param me  the multi-set to get the floor key from
+ * @param key the key to use for comparison
+ *
+ * @return the key which is the floor, or NULL if it does not exist
+ */
+void *multiset_floor(multiset me, void *const key)
+{
+    char *ret = NULL;
+    char *traverse = me->root;
+    while (traverse) {
+        const int compare = me->comparator(traverse + node_key_offset, key);
+        if (compare <= 0) {
+            ret = traverse + node_key_offset;
+            memcpy(&traverse, traverse + node_right_child_offset, ptr_size);
+        } else {
+            memcpy(&traverse, traverse + node_left_child_offset, ptr_size);
+        }
+    }
+    return ret;
+}
+
+/**
+ * Returns the key which is the ceiling of the comparison key. Meaning that the
+ * the lowest key which is higher or equal to the key used for comparison is
+ * returned.
+ *
+ * @param me  the multi-set to get the ceiling key from
+ * @param key the key to use for comparison
+ *
+ * @return the key which is the ceiling, or NULL if it does not exist
+ */
+void *multiset_ceiling(multiset me, void *const key)
+{
+    char *ret = NULL;
+    char *traverse = me->root;
+    while (traverse) {
+        const int compare = me->comparator(traverse + node_key_offset, key);
+        if (compare >= 0) {
+            ret = traverse + node_key_offset;
+            memcpy(&traverse, traverse + node_left_child_offset, ptr_size);
+        } else {
+            memcpy(&traverse, traverse + node_right_child_offset, ptr_size);
+        }
+    }
+    return ret;
+}
+
 /**
  * Clears the keys from the multiset.
  *
diff --git a/src/set.c b/src/set.c
index e9a4a62..686884a 100644
--- a/src/set.c
+++ b/src/set.c
@@ -684,6 +684,157 @@ bk_err set_remove(set me, void *const key)
     return BK_TRUE;
 }
 
+/**
+ * Returns the first (lowest) key in this set. The returned key is a pointer to
+ * the internally stored key, which should not be modified. Modifying it results
+ * in undefined behaviour.
+ *
+ * @param me the set to get the key from
+ *
+ * @return the lowest key in this set, or NULL if it is empty
+ */
+void *set_first(set me)
+{
+    char *traverse = me->root;
+    char *traverse_left;
+    if (!traverse) {
+        return NULL;
+    }
+    memcpy(&traverse_left, traverse + node_left_child_offset, ptr_size);
+    while (traverse_left) {
+        traverse = traverse_left;
+        memcpy(&traverse_left, traverse + node_left_child_offset, ptr_size);
+    }
+    return traverse + node_key_offset;
+}
+
+/**
+ * Returns the last (highest) key in this set. The returned key is a pointer to
+ * the internally stored key, which should not be modified. Modifying it results
+ * in undefined behaviour.
+ *
+ * @param me the set to get the key from
+ *
+ * @return the highest key in this set, or NULL if it is empty
+ */
+void *set_last(set me)
+{
+    char *traverse = me->root;
+    char *traverse_right;
+    if (!traverse) {
+        return NULL;
+    }
+    memcpy(&traverse_right, traverse + node_right_child_offset, ptr_size);
+    while (traverse_right) {
+        traverse = traverse_right;
+        memcpy(&traverse_right, traverse + node_right_child_offset, ptr_size);
+    }
+    return traverse + node_key_offset;
+}
+
+/**
+ * Returns the key which is strictly lower than the comparison key. Meaning that
+ * the highest key which is lower than the key used for comparison is returned.
+ *
+ * @param me  the set to get the lower key from
+ * @param key the key to use for comparison
+ *
+ * @return the key which is strictly lower, or NULL if it does not exist
+ */
+void *set_lower(set me, void *const key)
+{
+    char *ret = NULL;
+    char *traverse = me->root;
+    while (traverse) {
+        const int compare = me->comparator(traverse + node_key_offset, key);
+        if (compare < 0) {
+            ret = traverse + node_key_offset;
+            memcpy(&traverse, traverse + node_right_child_offset, ptr_size);
+        } else {
+            memcpy(&traverse, traverse + node_left_child_offset, ptr_size);
+        }
+    }
+    return ret;
+}
+
+/**
+ * Returns the key which is strictly higher than the comparison key. Meaning
+ * that the lowest key which is higher than the key used for comparison is
+ * returned.
+ *
+ * @param me  the set to get the higher key from
+ * @param key the key to use for comparison
+ *
+ * @return the key which is strictly higher, or NULL if it does not exist
+ */
+void *set_higher(set me, void *const key)
+{
+    char *ret = NULL;
+    char *traverse = me->root;
+    while (traverse) {
+        const int compare = me->comparator(traverse + node_key_offset, key);
+        if (compare > 0) {
+            ret = traverse + node_key_offset;
+            memcpy(&traverse, traverse + node_left_child_offset, ptr_size);
+        } else {
+            memcpy(&traverse, traverse + node_right_child_offset, ptr_size);
+        }
+    }
+    return ret;
+}
+
+/**
+ * Returns the key which is the floor of the comparison key. Meaning that the
+ * the highest key which is lower or equal to the key used for comparison is
+ * returned.
+ *
+ * @param me  the set to get the floor key from
+ * @param key the key to use for comparison
+ *
+ * @return the key which is the floor, or NULL if it does not exist
+ */
+void *set_floor(set me, void *const key)
+{
+    char *ret = NULL;
+    char *traverse = me->root;
+    while (traverse) {
+        const int compare = me->comparator(traverse + node_key_offset, key);
+        if (compare <= 0) {
+            ret = traverse + node_key_offset;
+            memcpy(&traverse, traverse + node_right_child_offset, ptr_size);
+        } else {
+            memcpy(&traverse, traverse + node_left_child_offset, ptr_size);
+        }
+    }
+    return ret;
+}
+
+/**
+ * Returns the key which is the ceiling of the comparison key. Meaning that the
+ * the lowest key which is higher or equal to the key used for comparison is
+ * returned.
+ *
+ * @param me  the set to get the ceiling key from
+ * @param key the key to use for comparison
+ *
+ * @return the key which is the ceiling, or NULL if it does not exist
+ */
+void *set_ceiling(set me, void *const key)
+{
+    char *ret = NULL;
+    char *traverse = me->root;
+    while (traverse) {
+        const int compare = me->comparator(traverse + node_key_offset, key);
+        if (compare >= 0) {
+            ret = traverse + node_key_offset;
+            memcpy(&traverse, traverse + node_left_child_offset, ptr_size);
+        } else {
+            memcpy(&traverse, traverse + node_right_child_offset, ptr_size);
+        }
+    }
+    return ret;
+}
+
 /**
  * Clears the keys from the set.
  *
diff --git a/tst/test_map.c b/tst/test_map.c
index f7fac6f..b891df9 100644
--- a/tst/test_map.c
+++ b/tst/test_map.c
@@ -601,6 +601,99 @@ static void test_big_object(void)
     assert(!map_destroy(me));
 }
 
+static void test_ordered_retrieval(void)
+{
+    int *get;
+    int val = 4;
+    map me = map_init(sizeof(int), sizeof(int), compare_int);
+    assert(!map_first(me));
+    assert(!map_last(me));
+    assert(map_put(me, &val, &val) == BK_OK);
+    get = map_first(me);
+    assert(val == *get);
+    get = map_last(me);
+    assert(val == *get);
+    val = 5;
+    assert(map_put(me, &val, &val) == BK_OK);
+    val = 3;
+    assert(map_put(me, &val, &val) == BK_OK);
+    get = map_first(me);
+    assert(3 == *get);
+    get = map_last(me);
+    assert(5 == *get);
+    /* Lower tests */
+    val = 7;
+    get = map_lower(me, &val);
+    assert(5 == *get);
+    val = 6;
+    get = map_lower(me, &val);
+    assert(5 == *get);
+    val = 5;
+    get = map_lower(me, &val);
+    assert(4 == *get);
+    val = 4;
+    get = map_lower(me, &val);
+    assert(3 == *get);
+    val = 3;
+    get = map_lower(me, &val);
+    assert(!get);
+    /* Higher tests */
+    val = 1;
+    get = map_higher(me, &val);
+    assert(3 == *get);
+    val = 2;
+    get = map_higher(me, &val);
+    assert(3 == *get);
+    val = 3;
+    get = map_higher(me, &val);
+    assert(4 == *get);
+    val = 4;
+    get = map_higher(me, &val);
+    assert(5 == *get);
+    val = 5;
+    get = map_higher(me, &val);
+    assert(!get);
+    /* Floor tests */
+    val = 7;
+    get = map_floor(me, &val);
+    assert(5 == *get);
+    val = 6;
+    get = map_floor(me, &val);
+    assert(5 == *get);
+    val = 5;
+    get = map_floor(me, &val);
+    assert(5 == *get);
+    val = 4;
+    get = map_floor(me, &val);
+    assert(4 == *get);
+    val = 3;
+    get = map_floor(me, &val);
+    assert(3 == *get);
+    val = 2;
+    get = map_floor(me, &val);
+    assert(!get);
+    /* Ceiling tests */
+    val = 1;
+    get = map_ceiling(me, &val);
+    assert(3 == *get);
+    val = 2;
+    get = map_ceiling(me, &val);
+    assert(3 == *get);
+    val = 3;
+    get = map_ceiling(me, &val);
+    assert(3 == *get);
+    val = 4;
+    get = map_ceiling(me, &val);
+    assert(4 == *get);
+    val = 5;
+    get = map_ceiling(me, &val);
+    assert(5 == *get);
+    val = 6;
+    get = map_ceiling(me, &val);
+    assert(!get);
+    map_destroy(me);
+}
+
 void test_map(void)
 {
     test_invalid_init();
@@ -617,4 +710,5 @@ void test_map(void)
     test_put_out_of_memory();
 #endif
     test_big_object();
+    test_ordered_retrieval();
 }
diff --git a/tst/test_multimap.c b/tst/test_multimap.c
index e8cefa7..dee2a95 100644
--- a/tst/test_multimap.c
+++ b/tst/test_multimap.c
@@ -674,6 +674,100 @@ static void test_big_object(void)
     assert(!multimap_destroy(me));
 }
 
+static void test_ordered_retrieval(void)
+{
+    int *get;
+    int val = 4;
+    multimap me = multimap_init(sizeof(int), sizeof(int), compare_int,
+                                compare_int);
+    assert(!multimap_first(me));
+    assert(!multimap_last(me));
+    assert(multimap_put(me, &val, &val) == BK_OK);
+    get = multimap_first(me);
+    assert(val == *get);
+    get = multimap_last(me);
+    assert(val == *get);
+    val = 5;
+    assert(multimap_put(me, &val, &val) == BK_OK);
+    val = 3;
+    assert(multimap_put(me, &val, &val) == BK_OK);
+    get = multimap_first(me);
+    assert(3 == *get);
+    get = multimap_last(me);
+    assert(5 == *get);
+    /* Lower tests */
+    val = 7;
+    get = multimap_lower(me, &val);
+    assert(5 == *get);
+    val = 6;
+    get = multimap_lower(me, &val);
+    assert(5 == *get);
+    val = 5;
+    get = multimap_lower(me, &val);
+    assert(4 == *get);
+    val = 4;
+    get = multimap_lower(me, &val);
+    assert(3 == *get);
+    val = 3;
+    get = multimap_lower(me, &val);
+    assert(!get);
+    /* Higher tests */
+    val = 1;
+    get = multimap_higher(me, &val);
+    assert(3 == *get);
+    val = 2;
+    get = multimap_higher(me, &val);
+    assert(3 == *get);
+    val = 3;
+    get = multimap_higher(me, &val);
+    assert(4 == *get);
+    val = 4;
+    get = multimap_higher(me, &val);
+    assert(5 == *get);
+    val = 5;
+    get = multimap_higher(me, &val);
+    assert(!get);
+    /* Floor tests */
+    val = 7;
+    get = multimap_floor(me, &val);
+    assert(5 == *get);
+    val = 6;
+    get = multimap_floor(me, &val);
+    assert(5 == *get);
+    val = 5;
+    get = multimap_floor(me, &val);
+    assert(5 == *get);
+    val = 4;
+    get = multimap_floor(me, &val);
+    assert(4 == *get);
+    val = 3;
+    get = multimap_floor(me, &val);
+    assert(3 == *get);
+    val = 2;
+    get = multimap_floor(me, &val);
+    assert(!get);
+    /* Ceiling tests */
+    val = 1;
+    get = multimap_ceiling(me, &val);
+    assert(3 == *get);
+    val = 2;
+    get = multimap_ceiling(me, &val);
+    assert(3 == *get);
+    val = 3;
+    get = multimap_ceiling(me, &val);
+    assert(3 == *get);
+    val = 4;
+    get = multimap_ceiling(me, &val);
+    assert(4 == *get);
+    val = 5;
+    get = multimap_ceiling(me, &val);
+    assert(5 == *get);
+    val = 6;
+    get = multimap_ceiling(me, &val);
+    assert(!get);
+    multimap_destroy(me);
+}
+
 void test_multimap(void)
 {
     test_invalid_init();
@@ -691,4 +785,5 @@ void test_multimap(void)
     test_put_out_of_memory();
 #endif
     test_big_object();
+    test_ordered_retrieval();
 }
diff --git a/tst/test_multiset.c b/tst/test_multiset.c
index a1773f0..945d5e3 100644
--- a/tst/test_multiset.c
+++ b/tst/test_multiset.c
@@ -605,6 +605,99 @@ static void test_big_object(void)
     assert(!multiset_destroy(me));
 }
 
+static void test_ordered_retrieval(void)
+{
+    int *get;
+    int val = 4;
+    multiset me = multiset_init(sizeof(int), compare_int);
+    assert(!multiset_first(me));
+    assert(!multiset_last(me));
+    assert(multiset_put(me, &val) == BK_OK);
+    get = multiset_first(me);
+    assert(val == *get);
+    get = multiset_last(me);
+    assert(val == *get);
+    val = 5;
+    assert(multiset_put(me, &val) == BK_OK);
+    val = 3;
+    assert(multiset_put(me, &val) == BK_OK);
+    get = multiset_first(me);
+    assert(3 == *get);
+    get = multiset_last(me);
+    assert(5 == *get);
+    /* Lower tests */
+    val = 7;
+    get = multiset_lower(me, &val);
+    assert(5 == *get);
+    val = 6;
+    get = multiset_lower(me, &val);
+    assert(5 == *get);
+    val = 5;
+    get = multiset_lower(me, &val);
+    assert(4 == *get);
+    val = 4;
+    get = multiset_lower(me, &val);
+    assert(3 == *get);
+    val = 3;
+    get = multiset_lower(me, &val);
+    assert(!get);
+    /* Higher tests */
+    val = 1;
+    get = multiset_higher(me, &val);
+    assert(3 == *get);
+    val = 2;
+    get = multiset_higher(me, &val);
+    assert(3 == *get);
+    val = 3;
+    get = multiset_higher(me, &val);
+    assert(4 == *get);
+    val = 4;
+    get = multiset_higher(me, &val);
+    assert(5 == *get);
+    val = 5;
+    get = multiset_higher(me, &val);
+    assert(!get);
+    /* Floor tests */
+    val = 7;
+    get = multiset_floor(me, &val);
+    assert(5 == *get);
+    val = 6;
+    get = multiset_floor(me, &val);
+    assert(5 == *get);
+    val = 5;
+    get = multiset_floor(me, &val);
+    assert(5 == *get);
+    val = 4;
+    get = multiset_floor(me, &val);
+    assert(4 == *get);
+    val = 3;
+    get = multiset_floor(me, &val);
+    assert(3 == *get);
+    val = 2;
+    get = multiset_floor(me, &val);
+    assert(!get);
+    /* Ceiling tests */
+    val = 1;
+    get = multiset_ceiling(me, &val);
+    assert(3 == *get);
+    val = 2;
+    get = multiset_ceiling(me, &val);
+    assert(3 == *get);
+    val = 3;
+    get = multiset_ceiling(me, &val);
+    assert(3 == *get);
+    val = 4;
+    get = multiset_ceiling(me, &val);
+    assert(4 == *get);
+    val = 5;
+    get = multiset_ceiling(me, &val);
+    assert(5 == *get);
+    val = 6;
+    get = multiset_ceiling(me, &val);
+    assert(!get);
+    multiset_destroy(me);
+}
+
 void test_multiset(void)
 {
     test_invalid_init();
@@ -621,4 +714,5 @@ void test_multiset(void)
     test_put_out_of_memory();
 #endif
     test_big_object();
+    test_ordered_retrieval();
 }
diff --git a/tst/test_set.c b/tst/test_set.c
index e07e7e9..304e721 100644
--- a/tst/test_set.c
+++ b/tst/test_set.c
@@ -574,6 +574,99 @@ static void test_big_object(void)
     assert(!set_destroy(me));
 }
 
+static void test_ordered_retrieval(void)
+{
+    int *get;
+    int val = 4;
+    set me = set_init(sizeof(int), compare_int);
+    assert(!set_first(me));
+    assert(!set_last(me));
+    assert(set_put(me, &val) == BK_OK);
+    get = set_first(me);
+    assert(val == *get);
+    get = set_last(me);
+    assert(val == *get);
+    val = 5;
+    assert(set_put(me, &val) == BK_OK);
+    val = 3;
+    assert(set_put(me, &val) == BK_OK);
+    get = set_first(me);
+    assert(3 == *get);
+    get = set_last(me);
+    assert(5 == *get);
+    /* Lower tests */
+    val = 7;
+    get = set_lower(me, &val);
+    assert(5 == *get);
+    val = 6;
+    get = set_lower(me, &val);
+    assert(5 == *get);
+    val = 5;
+    get = set_lower(me, &val);
+    assert(4 == *get);
+    val = 4;
+    get = set_lower(me, &val);
+    assert(3 == *get);
+    val = 3;
+    get = set_lower(me, &val);
+    assert(!get);
+    /* Higher tests */
+    val = 1;
+    get = set_higher(me, &val);
+    assert(3 == *get);
+    val = 2;
+    get = set_higher(me, &val);
+    assert(3 == *get);
+    val = 3;
+    get = set_higher(me, &val);
+    assert(4 == *get);
+    val = 4;
+    get = set_higher(me, &val);
+    assert(5 == *get);
+    val = 5;
+    get = set_higher(me, &val);
+    assert(!get);
+    /* Floor tests */
+    val = 7;
+    get = set_floor(me, &val);
+    assert(5 == *get);
+    val = 6;
+    get = set_floor(me, &val);
+    assert(5 == *get);
+    val = 5;
+    get = set_floor(me, &val);
+    assert(5 == *get);
+    val = 4;
+    get = set_floor(me, &val);
+    assert(4 == *get);
+    val = 3;
+    get = set_floor(me, &val);
+    assert(3 == *get);
+    val = 2;
+    get = set_floor(me, &val);
+    assert(!get);
+    /* Ceiling tests */
+    val = 1;
+    get = set_ceiling(me, &val);
+    assert(3 == *get);
+    val = 2;
+    get = set_ceiling(me, &val);
+    assert(3 == *get);
+    val = 3;
+    get = set_ceiling(me, &val);
+    assert(3 == *get);
+    val = 4;
+    get = set_ceiling(me, &val);
+    assert(4 == *get);
+    val = 5;
+    get = set_ceiling(me, &val);
+    assert(5 == *get);
+    val = 6;
+    get = set_ceiling(me, &val);
+    assert(!get);
+    set_destroy(me);
+}
+
 void test_set(void)
 {
     test_invalid_init();
@@ -589,4 +682,5 @@ void test_set(void)
     test_put_out_of_memory();
 #endif
     test_big_object();
+    test_ordered_retrieval();
 }