From f9d2156e233fede5745bd34c13d0efc2ac22a22c Mon Sep 17 00:00:00 2001
From: Martin Piatka <piatka@cesnet.cz>
Date: Tue, 13 Jun 2023 12:55:23 +0200
Subject: [PATCH] ring_buffer: Fix warn about too big write when writing 0
 bytes

---
 src/utils/ring_buffer.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/utils/ring_buffer.cpp b/src/utils/ring_buffer.cpp
index 148899ae6..0732f863f 100644
--- a/src/utils/ring_buffer.cpp
+++ b/src/utils/ring_buffer.cpp
@@ -209,6 +209,8 @@ void ring_buffer_write(struct ring_buffer * ring, const char *in, int len) {
         int size1;
         void *ptr2;
         int size2;
+        if(len == 0)
+                return;
         if(!ring_get_write_regions(ring, len, &ptr1, &size1, &ptr2, &size2)){
                 fprintf(stderr, "Warning: too long write request for ring buffer (%d B)!!!\n", len);
                 return;
@@ -233,6 +235,8 @@ void ring_fill(struct ring_buffer *ring, int c, int size){
         int size1;
         void *ptr2;
         int size2;
+        if(size == 0)
+                return;
         if(!ring_get_write_regions(ring, size, &ptr1, &size1, &ptr2, &size2)){
                 fprintf(stderr, "Warning: too long write request for ring buffer (%d B)!!!\n", size);
                 return;