Support for older version of Arduino IDE

Author: thienandangthanh

avdweb_VirtualDelay.h

@@ -1,9 +1,12 @@
 /*
 Copyright (C) 2016  Albert van Dalen http://www.avdweb.nl
-This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License
-as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
-This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
-of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License at http://www.gnu.org/licenses .
+This program is free software: you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free Software
+Foundation, either version 3 of the License, or (at your option) any later
+version. This program is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License at
+http://www.gnu.org/licenses .
 
 AUTHOR: Albert van Dalen
 WEBSITE: http://www.avdweb.nl/arduino/libraries/virtualdelay.html
@@ -12,17 +15,30 @@ WEBSITE: http://www.avdweb.nl/arduino/libraries/virtualdelay.html
 #ifndef VirtualDelay_H
 #define VirtualDelay_H
 
-class VirtualDelay
-{  
-public:
-  VirtualDelay(unsigned long (*timerFunctionPtr)() = millis); 
+#if ARDUINO >= 100
+#include <Arduino.h>
+#else
+#include <WProgram.h>
+#include <wiring.h>
+#endif
+
+class VirtualDelay {
+ public:
+  VirtualDelay(unsigned long (*timerFunctionPtr)() = millis);
   void start(signed long delay);
   bool elapsed();
-  
-  bool running=0;
-  unsigned long timeOut, (*timerFunctionPtr)(); 
+
+  bool running = 0;
+  unsigned long timeOut, (*timerFunctionPtr)();
 };
 
-#define DO_ONCE(x) {static bool b; if(!b) {b=1; x;}} 
+#define DO_ONCE(x) \
+  {                \
+    static bool b; \
+    if (!b) {      \
+      b = 1;       \
+      x;           \
+    }              \
+  }
 
-#endif
+#endif