array: Add an insert/create function for value based arrays

src/libstrongswan/collections/array.c

@@ -277,6 +277,16 @@ void array_insert_create(array_t **array, int idx, void *ptr)
 	array_insert(*array, idx, ptr);
 }
 
+void array_insert_create_value(array_t **array, u_int esize,
+							   int idx, void *val)
+{
+	if (*array == NULL)
+	{
+		*array = array_create(esize, 0);
+	}
+	array_insert(*array, idx, val);
+}
+
 void array_insert_enumerator(array_t *array, int idx, enumerator_t *enumerator)
 {
 	void *ptr;

src/libstrongswan/collections/array.h

@@ -138,6 +138,21 @@ void array_insert(array_t *array, int idx, void *data);
  */
 void array_insert_create(array_t **array, int idx, void *ptr);
 
+/**
+ * Create a value based array if it does not exist, insert value.
+ *
+ * This is a convenience function to insert a value and implicitly
+ * create a value based array if array is NULL. Array is set the the newly
+ * created array, if any.
+ *
+ * @param array			pointer to array reference, potentially NULL
+ * @param esize			element size of this array
+ * @param idx			index to insert item at
+ * @param val			pointer to value to insert
+ */
+void array_insert_create_value(array_t **array, u_int esize,
+							   int idx, void *val);
+
 /**
  * Insert all items from an enumerator to an array.
  *

src/libstrongswan/tests/suites/test_array.c

@@ -491,6 +491,44 @@ START_TEST(test_invoke_offset)
 }
 END_TEST
 
+START_TEST(test_insert_create)
+{
+	array_t *array = NULL;
+	uintptr_t x;
+
+	array_insert_create(&array, ARRAY_TAIL, (void*)(uintptr_t)1);
+	array_insert_create(&array, ARRAY_TAIL, (void*)(uintptr_t)2);
+	ck_assert(array != NULL);
+
+	ck_assert(array_get(array, ARRAY_HEAD, &x));
+	ck_assert_int_eq(x, 1);
+	ck_assert(array_get(array, ARRAY_TAIL, &x));
+	ck_assert_int_eq(x, 2);
+
+	array_destroy(array);
+}
+END_TEST
+
+START_TEST(test_insert_create_value)
+{
+	array_t *array = NULL;
+	u_int16_t v;
+
+	v = 1;
+	array_insert_create_value(&array, sizeof(v), ARRAY_TAIL, &v);
+	v = 2;
+	array_insert_create_value(&array, sizeof(v), ARRAY_TAIL, &v);
+	ck_assert(array != NULL);
+
+	ck_assert(array_get(array, ARRAY_HEAD, &v));
+	ck_assert_int_eq(v, 1);
+	ck_assert(array_get(array, ARRAY_TAIL, &v));
+	ck_assert_int_eq(v, 2);
+
+	array_destroy(array);
+}
+END_TEST
+
 Suite *array_suite_create()
 {
 	Suite *s;
@@ -528,5 +566,10 @@ Suite *array_suite_create()
 	tcase_add_test(tc, test_invoke_offset);
 	suite_add_tcase(s, tc);
 
+	tc = tcase_create("insert create");
+	tcase_add_test(tc, test_insert_create);
+	tcase_add_test(tc, test_insert_create_value);
+	suite_add_tcase(s, tc);
+
 	return s;
 }