From d4d29307a2e60aac7b7378f3e42d7df2aed038f2 Mon Sep 17 00:00:00 2001
From: Jon Trulson <jtrulson@ics.com>
Date: Tue, 8 Sep 2015 13:21:12 -0600
Subject: [PATCH] rotaryencoder: throw exception(s) on fatal errors

Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
---
 src/rotaryencoder/rotaryencoder.cxx | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/rotaryencoder/rotaryencoder.cxx b/src/rotaryencoder/rotaryencoder.cxx
index 2e580a54..15b7b5d4 100644
--- a/src/rotaryencoder/rotaryencoder.cxx
+++ b/src/rotaryencoder/rotaryencoder.cxx
@@ -23,6 +23,8 @@
  */
 
 #include <iostream>
+#include <string>
+#include <stdexcept>
 
 #include "rotaryencoder.h"
 
@@ -33,7 +35,8 @@ RotaryEncoder::RotaryEncoder(int pinA, int pinB)
 {
   if ( !(m_gpioA = mraa_gpio_init(pinA)) )
     {
-      cerr << __FUNCTION__ << ": mraa_gpio_init() failed" << endl;
+      throw std::invalid_argument(std::string(__FUNCTION__) +
+                                  ": mraa_gpio_init(pinA) failed, invalid pin?");
       return;
     }
 
@@ -41,7 +44,8 @@ RotaryEncoder::RotaryEncoder(int pinA, int pinB)
 
   if ( !(m_gpioB = mraa_gpio_init(pinB)) )
     {
-      cerr << __FUNCTION__ << ": mraa_gpio_init() failed" << endl;
+      throw std::invalid_argument(std::string(__FUNCTION__) +
+                                  ": mraa_gpio_init(pinB) failed, invalid pin?");
       return;
     }