From 2c6a3b7c4f662b7a94a8ba6870565a45df0cbe2c Mon Sep 17 00:00:00 2001
From: Florian Westphal <fw@strlen.de>
Date: Wed, 27 Jul 2016 15:22:25 +0200
Subject: utils: provide snprintf helper macro

lifted from libnftnl, except that we will abort on snprintf errors.

Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 include/utils.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'include/utils.h')

diff --git a/include/utils.h b/include/utils.h
index d8867647..bb58ba42 100644
--- a/include/utils.h
+++ b/include/utils.h
@@ -83,6 +83,16 @@
 	(void) (&_max1 == &_max2);		\
 	_max1 > _max2 ? _max1 : _max2; })
 
+#define SNPRINTF_BUFFER_SIZE(ret, size, len, offset)	\
+	if (ret < 0)					\
+		abort();				\
+	offset += ret;					\
+	assert(ret < len);				\
+	if (ret > len)					\
+		ret = len;				\
+	size += ret;					\
+	len -= ret;
+
 #define MSEC_PER_SEC	1000L
 
 /**
-- 
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