From bad728446564bc705ee5b348015a8ef0afcb7336 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=A1clav=20=C5=A0milauer?= <eu@doxos.eu>
Date: Sat, 9 Nov 2019 09:30:27 +0100
Subject: [PATCH] Fix cicular_q::size()

---
 include/spdlog/details/circular_q.h | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/include/spdlog/details/circular_q.h b/include/spdlog/details/circular_q.h
index aac4223f2..d07f07256 100644
--- a/include/spdlog/details/circular_q.h
+++ b/include/spdlog/details/circular_q.h
@@ -75,7 +75,14 @@ class circular_q
     // Return number of elements actually stored
     size_t size() const
     {
-        return (tail_ - head_) % max_items_;
+        if (tail_ > head_)
+        {
+           return (tail_ - head_) % max_items;
+        }
+        else
+        {
+            return max_items - (head_ - tail_ ) % max_items;
+        }
     }
 
     // Return const reference to item by index.