From 496a62549f613b805feb559b557c2474f5e9a744 Mon Sep 17 00:00:00 2001
From: Piv <18462828+Piv200@users.noreply.github.com>
Date: Tue, 7 Jul 2020 22:48:17 +0930
Subject: [PATCH] Add inWaiting Property

---
 Sources/SwiftSerial.swift | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Sources/SwiftSerial.swift b/Sources/SwiftSerial.swift
index 94e56e7..c504fb0 100644
--- a/Sources/SwiftSerial.swift
+++ b/Sources/SwiftSerial.swift
@@ -165,6 +165,11 @@ public enum BaudRate {
 }
 #endif
 
+#if os(OSX)
+// Darwin doesn't provide this
+private let FIONREAD: UInt = 0x541B
+#endif
+
 public enum DataBitsSize {
     case bits5
     case bits6
@@ -384,6 +389,12 @@ public class SerialPort {
             }
         }
     }
+    
+    public var inWaiting: Int? {
+        get{
+            return Int(ioctl(fileDescriptor!, FIONREAD))
+        }
+    }
 }
 
 // MARK: Receiving