1 files changed, 7 insertions, 0 deletions
diff --git a/arr.c b/arr.c
index dea2760..0e545f7 100644
--- a/arr.c
+++ b/arr.c
@@ -157,6 +157,12 @@ static void arr_set_len_(void **arr, size_t member_size, size_t n) {
 	}
 }
 
+static void arr_remove_(void *arr, size_t member_size, size_t index) {
+	ArrHeader *hdr = arr_hdr_(arr);
+	assert(index < hdr->len);
+	memmove((char *)arr + index * member_size, (char *)arr + (index+1) * member_size, (hdr->len - (index+1)) * member_size);
+	--hdr->len;
+}
 
 #ifdef __cplusplus
 #define arr_cast_typeof(a) (decltype(a))
@@ -183,6 +189,7 @@ static void arr_set_len_(void **arr, size_t member_size, size_t n) {
 // the newly-added elements are zero-initialized.
 #define arr_qsort(a, cmp) qsort((a), arr_len(a), sizeof *(a), (cmp))
 #define arr_remove_last(a) do { assert(a); if (--arr_hdr_(a)->len == 0) arr_free(a); } while (0)
+#define arr_remove(a, i) arr_remove_((a), sizeof *(a), (i))
 #define arr_pop_last(a) ((a)[--arr_hdr_(a)->len])
 #define arr_size_in_bytes(a) (arr_len(a) * sizeof *(a))
 #define arr_lastp(a) ((a) ? &(a)[arr_len(a)-1] : NULL)