From 0be94a8db1793b9f077d92bfc9db4f2a22914403 Mon Sep 17 00:00:00 2001
From: jswirl <pujnmao@gmail.com>
Date: Sat, 23 Apr 2016 21:31:06 +0900
Subject: [PATCH] Fix head index not wrapped around

---
 cbuffer.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/cbuffer.c b/cbuffer.c
index a0904b1..c1e3e6f 100644
--- a/cbuffer.c
+++ b/cbuffer.c
@@ -109,6 +109,8 @@ unsigned char *cbuf_poll(cbuf_t *me, const unsigned int size)
 
     void *end = me->data + me->head;
     me->head += size;
+    if (me->head >= me->size)
+        me->head -= me->size;
     return end;
 }