array: mark array_length argument as const

2 files changed, 2 insertions, 2 deletions

diff --git a/array.c b/array.c
index 33a72b8..97bbb30 100644
--- a/array.c
+++ b/array.c
@@ -124,7 +124,7 @@ bool array_remove(Array *arr, size_t idx) {
 	return true;
 }
 
-size_t array_length(Array *arr) {
+size_t array_length(const Array *arr) {
 	return arr->len;
 }
 
diff --git a/array.h b/array.h
index d55af28..fa26a4e 100644
--- a/array.h
+++ b/array.h
@@ -91,7 +91,7 @@ bool array_add_ptr(Array*, void *item);
  */
 bool array_remove(Array*, size_t idx);
 /** Number of elements currently stored in the array. */
-size_t array_length(Array*);
+size_t array_length(const Array*);
 /** Number of elements which can be stored without enlarging the array. */
 size_t array_capacity(Array*);
 /** Remove all elements with index greater or equal to ``length``, keep allocated memory. */