Adding Wiring-compatible random(min) and random(min, max) functions (except operating on longs instead of floats).

targets/arduino/WProgram.h

@@ -5,5 +5,12 @@
 #include <avr/signal.h>
 
 #include "wiring.h"
+
+#ifdef __cplusplus
 #include "HardwareSerial.h"
 
+// random prototypes
+long random(long);
+long random(long, long);
+void randomSeed(unsigned int);
+#endif

targets/arduino/WRandom.cpp

@@ -0,0 +1,54 @@
+/* -*- mode: jde; c-basic-offset: 2; indent-tabs-mode: nil -*- */
+
+/*
+  Part of the Wiring project - http://wiring.org.co
+  Copyright (c) 2004-06 Hernando Barragan
+  Modified 13 August 2006, David A. Mellis for Arduino - http://www.arduino.cc/
+  
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General
+  Public License along with this library; if not, write to the
+  Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+  Boston, MA  02111-1307  USA
+  
+  $Id$
+*/
+
+extern "C" {
+  #include "stdlib.h"
+}
+
+void randomSeed(unsigned int seed)
+{
+  if(seed != 0){
+    srand(seed);
+  }
+}
+
+long random(long howbig)
+{
+  long value;
+  if (howbig == 0){
+    return 0;
+  }
+  return rand() % howbig;
+}
+
+long random(long howsmall, long howbig)
+{
+  if(howsmall >= howbig){
+    return howsmall;
+  }
+  long diff = howbig - howsmall;
+  return random(diff) + howsmall;
+}
+