1 files changed, 22 insertions, 0 deletions
diff --git a/lib/dynarr/daextend.c b/lib/dynarr/daextend.c
new file mode 100644
index 0000000..efa96d5
--- /dev/null
+++ b/lib/dynarr/daextend.c
@@ -0,0 +1,22 @@
+#include <errno.h>
+#include <stdbit.h>
+#include <stdint.h>
+#include <string.h>
+
+#include "dynarr.h"
+
+void *
+(daextend)(void *da, void *xs, size_t n, size_t sz, size_t align)
+{
+	dynarr(uint8_t) cpy;
+	memcpy(&cpy, da, sizeof(cpy));
+
+	if ((cpy.len += n) > cpy.cap) {
+		size_t ncap = stdc_bit_ceil(cpy.len);
+		cpy.buf = cpy.alloc(cpy.ctx, cpy.buf, cpy.cap, ncap, sz, align);
+		cpy.cap = ncap;
+	}
+
+	memcpy(cpy.buf + cpy.len * sz - n * sz, xs, n * sz);
+	return memcpy(da, &cpy, sizeof(cpy));
+}