From 0e0a748037bc8766f0616b4d52a938ed447633c7 Mon Sep 17 00:00:00 2001
From: flagarde <lagarde@sjtu.edu.cn>
Date: Tue, 20 Apr 2021 00:25:06 +0800
Subject: [PATCH] Remove warnings (#284)

---
 ixwebsocket/IXHttp.cpp            | 2 +-
 ixwebsocket/IXNetSystem.cpp       | 4 +++-
 ixwebsocket/IXWebSocketServer.cpp | 1 -
 3 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/ixwebsocket/IXHttp.cpp b/ixwebsocket/IXHttp.cpp
index c6b43521..46212cf2 100644
--- a/ixwebsocket/IXHttp.cpp
+++ b/ixwebsocket/IXHttp.cpp
@@ -137,7 +137,7 @@ namespace ix
             {
                 contentLength = std::stoi(headers["Content-Length"]);
             }
-            catch (std::exception)
+            catch(const std::exception&)
             {
                 return std::make_tuple(
                     false, "Error parsing HTTP Header 'Content-Length'", httpRequest);
diff --git a/ixwebsocket/IXNetSystem.cpp b/ixwebsocket/IXNetSystem.cpp
index 6aec0b2f..c6510510 100644
--- a/ixwebsocket/IXNetSystem.cpp
+++ b/ixwebsocket/IXNetSystem.cpp
@@ -192,7 +192,8 @@ namespace ix
         return ::inet_ntop(af, a0, s, l);
 #endif
     }
-
+    
+#if defined(_WIN32) && defined(__GNUC__)
     static int hexval(unsigned c)
     {
         if (c - '0' < 10) return c - '0';
@@ -200,6 +201,7 @@ namespace ix
         if (c - 'a' < 6) return c - 'a' + 10;
         return -1;
     }
+#endif
 
     //
     // mingw does not have inet_pton, which were taken as is from the musl C library.
diff --git a/ixwebsocket/IXWebSocketServer.cpp b/ixwebsocket/IXWebSocketServer.cpp
index 7a9d4ea4..8a18f9d0 100644
--- a/ixwebsocket/IXWebSocketServer.cpp
+++ b/ixwebsocket/IXWebSocketServer.cpp
@@ -191,7 +191,6 @@ namespace ix
                         // Make sure the OS send buffer is flushed before moving on
                         do
                         {
-                            size_t bufferedAmount = client->bufferedAmount();
                             std::chrono::duration<double, std::milli> duration(500);
                             std::this_thread::sleep_for(duration);
                         } while (client->bufferedAmount() != 0);