array: add array initialization utility function

Reuses the element size from another array.

2 files changed, 6 insertions, 0 deletions

diff --git a/array.c b/array.c
index d0f937d..b65ad12 100644
--- a/array.c
+++ b/array.c
@@ -11,6 +11,10 @@ void array_init(Array *arr) {
 	array_init_sized(arr, sizeof(void*));
 }
 
+void array_init_from(Array *arr, Array *from) {
+	array_init_sized(arr, from->elem_size);
+}
+
 void array_init_sized(Array *arr, size_t elem_size) {
 	memset(arr, 0, sizeof *arr);
 	arr->elem_size = elem_size;
diff --git a/array.h b/array.h
index 8417f7d..80b3619 100644
--- a/array.h
+++ b/array.h
@@ -43,6 +43,8 @@ void array_init(Array*);
  * Initalize an Array object to store arbitrarily sized objects.
  */
 void array_init_sized(Array*, size_t elem_size);
+/** Initialize Array by using the same element size as in ``from``. */
+void array_init_from(Array*, Array *from);
 /** Release storage space. Reinitializes Array object. */
 void array_release(Array*);
 /**