--- libelwix/example/test_iovec.c	2021/03/19 01:29:24	1.1
+++ libelwix/example/test_iovec.c	2021/03/21 01:32:04	1.2
@@ -0,0 +1,62 @@
+#include <stdio.h>
+#include <elwix.h>
+
+
+int
+main(int argc, char **argv)
+{
+	iovec_t *iov;
+	char d[BUFSIZ], n[BUFSIZ];
+	size_t nl, dl = sizeof d;
+
+	iov = iov_Init();
+	if (!iov)
+		return 1;
+
+	printf("iov_Insert at 0 %d\n", iov_Insert(iov, 0, "aaaaa", 6));
+	printf("iov_Insert at 3 %d\n", iov_Insert(iov, 3, "BBBBB", 6));
+
+	iov_Debug(iov);
+
+	printf("iov_Delete at 1 %d\n", iov_Delete(iov, 1, 42));
+	printf("iov_Delete at 9 %d\n", iov_Delete(iov, 9, 0));
+
+	iov_Debug(iov);
+
+	printf("iov_Delete at 3 %d\n", iov_Delete(iov, 3, 0));
+	printf("iov_Insert at 2 %d\n", iov_Insert(iov, 2, "bbbBB", 6));
+
+	iov_Debug(iov);
+
+	printf("iov_Push at %d\n", iov_Push(iov, "oho", 4));
+	printf("iov_Pop at %d\n", iov_Pop(iov, d, &dl, 0));
+	printf(" -> (%zu) %s\n", dl, d);
+
+	iov_Debug(iov);
+
+	printf("iov_PushPair at %d\n", iov_PushPair(iov, "pair1", "o!o", (size_t) -1));
+
+	iov_Debug(iov);
+
+	nl = sizeof n;
+	dl = sizeof d;
+	printf("iov_PopPair at %d\n", iov_PopPair(iov, n, &nl, d, &dl, 0));
+	printf(" -> (%zu) %s = (%zu) %s\n", nl, n, dl, d);
+
+	iov_Debug(iov);
+
+	printf("iov_PushPair at %d\n", iov_PushPair(iov, "pair1", "o!o", (size_t) -1));
+	printf("iov_PopPair without get data at %d\n", iov_PopPair(iov, NULL, NULL, NULL, NULL, 0));
+
+	iov_Delete(iov, 0, 0);
+	iov_Delete(iov, 1, 0);
+
+	printf("+iov_PopPair without get data at %d\n", iov_PopPair(iov, NULL, NULL, NULL, NULL, 0));
+
+	iov_Debug(iov);
+
+	iov_Destroy(&iov);
+
+	mpool_dump(NULL, NULL);
+	return 0;
+}