From da658b6e70e17cc8fe787ab2a7909fc3ce0b8cd4 Mon Sep 17 00:00:00 2001
From: Daniel Fekete <danieleff@gmail.com>
Date: Mon, 17 Apr 2017 13:37:26 +0200
Subject: [PATCH] Add arduino utility function implementation: random, map,
 makeWord

---
 STM32/cores/arduino/WMath.cpp | 67 +++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 STM32/cores/arduino/WMath.cpp

diff --git a/STM32/cores/arduino/WMath.cpp b/STM32/cores/arduino/WMath.cpp
new file mode 100644
index 0000000..27d6879
--- /dev/null
+++ b/STM32/cores/arduino/WMath.cpp
@@ -0,0 +1,67 @@
+/*
+  Copyright (c) 2011 Arduino.  All right reserved.
+
+  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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+extern "C" {
+  #include "stdlib.h"
+  #include "stdint.h"
+}
+
+extern void randomSeed( uint32_t dwSeed )
+{
+  if ( dwSeed != 0 )
+  {
+    srand( dwSeed ) ;
+  }
+}
+
+extern long random( long howbig )
+{
+  if ( howbig == 0 )
+  {
+    return 0 ;
+  }
+
+  return rand() % howbig;
+}
+
+extern long random( long howsmall, long howbig )
+{
+  if (howsmall >= howbig)
+  {
+    return howsmall;
+  }
+
+  long diff = howbig - howsmall;
+
+  return random(diff) + howsmall;
+}
+
+extern long map(long x, long in_min, long in_max, long out_min, long out_max)
+{
+  return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
+}
+
+extern uint16_t makeWord( uint16_t w )
+{
+  return w ;
+}
+
+extern uint16_t makeWord( uint8_t h, uint8_t l )
+{
+  return (h << 8) | l ;
+}