From b44293b115bbe69033ab9c066d301e1f7aaf64cf Mon Sep 17 00:00:00 2001
From: Iru Cai <mytbk920423@gmail.com>
Date: Mon, 21 May 2018 14:32:34 +0800
Subject: buffer_append: support NULL argument s to just allocate the space

---
 src/protocol/internal/buffer.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src/protocol/internal/buffer.c')

diff --git a/src/protocol/internal/buffer.c b/src/protocol/internal/buffer.c
index f75d33e..dc53781 100644
--- a/src/protocol/internal/buffer.c
+++ b/src/protocol/internal/buffer.c
@@ -51,7 +51,8 @@ static int ensure(buffer *b, size_t len)
 int buffer_append(buffer *b, const uint8_t *s, size_t len)
 {
 	if (ensure(b, len)) {
-		memcpy(b->p + b->offs + b->sz, s, len);
+		if (s != NULL)
+			memcpy(b->p + b->offs + b->sz, s, len);
 		b->sz += len;
 		return 1;
 	} else {
-- 
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