Add general array_len

1 files changed, 11 insertions, 3 deletions

diff --git a/array.c b/array.c
index 90af331..6c23330 100644
--- a/array.c
+++ b/array.c
@@ -177,6 +177,14 @@ array_append (void *data,
     return data;
 }
 
+static gssize
+array_len (void *data, const int *magic)
+{
+    array_t *array = get_array (data, magic);
+
+    return array->n_elements;
+}
+
 /***************************** individual array implementations ****************************/
 
 /* Generic arrays
@@ -215,7 +223,7 @@ nul_array_free (nul_ptr_t array)
 gsize
 nul_array_len (nul_ptr_t array)
 {
-    return get_array (array, &arr_t_magic)->n_elements;
+    return array_len (array, &arr_t_magic);
 }
 
 /* Pointer arrays. The idiomatic way to iterate through such an array is:
@@ -272,7 +280,7 @@ nul_ptr_array_free (void **arr)
 gsize
 nul_ptr_array_len (void *const *arr)
 {
-    return get_array (arr, &parr_t_magic)->n_elements;
+    return array_len (arr, &parr_t_magic);
 }
 
 /*
@@ -295,7 +303,7 @@ nul_string_free (nul_string_t *str)
 gsize
 nul_string_len (const nul_string_t *str)
 {
-    return get_array (str, &string_t_magic)->n_elements;
+    return array_len (str, &string_t_magic);
 }
 
 gboolean